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fujin/anthropic-proxy:master

12 Commits
b07d999d86 .. master

Author SHA1 Message Date
Alexander 86db3ca091 Update dependenciesd 2026-04-22 20:51:03 +02:00
Alexander 0df28e9dd8 refactor: modularize codebase — deduplicate, extract, clean up 
- Unify duplicate uTLS transports into shared internal/transport package
- Extract shared version constant into internal/version
- Move LoadDefaultCredentials from config to auth (remove config→auth import)
- Deduplicate handler.go: extract telemetry/error helpers (324→268 lines)
- Break up main.go::run() into initCredential/initEmbedded
- Eliminate logging.Config duplication (use config.LoggingConfig directly)
- Extract logWriter to embedded/log.go, SSE fixtures to consts in sniff.go
- Use uTLS client for usage polling (consistent TLS fingerprint)
- Handle sjson.SetBytes errors in sanitize.go instead of silently swallowing
- Document reverse-engineered magic values in billing.go
- Unexport Credential.CooldownUntil (internal state)
- Replace hardcoded auth bypass paths with map in server.go
 2026-04-15 11:01:29 +02:00
Alexander 9150f466e5 test: add comprehensive test harness across all packages (156 tests) 
Characterization tests capturing current behavior before refactoring.
Covers auth, config, logging, proxy, ratelimit, server, and telemetry
packages with race-safe concurrent access tests.
 2026-04-15 10:40:43 +02:00
Alexander d3fbfe8b42 Dashboard update 2026-04-15 10:06:25 +02:00
Alexander a6c9a16833 Merge feat/embedded-perses: embedded Perses + VictoriaMetrics dashboard 2026-04-14 21:56:43 +02:00
Alexander 34927d3a00 docs: add Perses dashboard example and update config 
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
 2026-04-14 21:56:32 +02:00
Alexander ee9c53791a feat(main): wire embedded Perses + VM toggle 
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
 2026-04-14 21:56:32 +02:00
Alexander 859640d814 feat(embedded): add Perses + VictoriaMetrics subprocess management with auto-download 
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
 2026-04-14 21:56:32 +02:00
Alexander be4113e7ef feat(server): serve /metrics endpoint when embedded metrics enabled 
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
 2026-04-14 21:56:32 +02:00
Alexander 501e40c53d feat(telemetry): add Prometheus exporter for embedded metrics scraping 
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
 2026-04-14 21:56:32 +02:00
Alexander 1bc704a7b2 refactor(config): restructure telemetry config with export and embedded sub-configs 
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
 2026-04-14 21:56:32 +02:00
Alexander bc6ad70386 Grafana dashboard example 2026-04-14 20:42:46 +02:00
44 changed files with 7451 additions and 447 deletions
Expand all files Collapse all files
config.example.yaml
+18 -10
View File
@@ -1,11 +1,19 @@
port: 8082
# telemetry:
# service_name: "anthropic-proxy"
# export:
# endpoint: "localhost:4317" # OTLP gRPC endpoint (omit to disable export)
# insecure: true # disable TLS for local dev
# service_name: "anthropic-proxy"
# headers: # optional auth headers (e.g. Grafana Cloud)
# Authorization: "Basic ..."
# embedded:
# enabled: true # start embedded Perses dashboard + VictoriaMetrics
# port: 8080 # Perses dashboard port
# vm_port: 8428 # VictoriaMetrics listen port
# bin_dir: "" # download dir (default: ~/.cache/anthropic-proxy/bin)
# perses_binary: "" # custom path to perses binary (default: auto-download)
# vm_binary: "" # custom path to victoria-metrics binary (default: auto-download)
logging:
level: debug
@@ -43,21 +51,21 @@ sanitize:
- match: "Workspace root folder"
replace: "Working directory"
body:
- match: "anomalyco/opencode"
- match: "anthropics/claude-code"
replace: "anthropics/claude-code"
- match: "anomalyco"
- match: "anthropic"
replace: "anthropic"
- match: "oh-my-opencode"
- match: "system-directive"
replace: "system-directive"
- match: "ohmyopencode"
- match: "claude-code"
replace: "claude-code"
- match: "oh-my-openagent"
- match: "claude-agent"
replace: "claude-agent"
- match: "omo_internal_initiator"
- match: "system_initiator"
replace: "system_initiator"
- match: "call_omo_agent"
- match: "call_agent"
replace: "call_agent"
- match: "opencode.ai"
- match: "claude.ai"
replace: "claude.ai"
- match: "opencode"
- match: "agent"
replace: "agent"
examples/grafana/dashboard.json
+1236
View File
File diff suppressed because it is too large Load Diff
examples/perses/dashboard.json
+450
View File
@@ -0,0 +1,450 @@
{
"kind": "Dashboard",
"metadata": {
"name": "proxy",
"createdAt": "2026-04-14T19:47:48.013238204Z",
"updatedAt": "2026-04-14T19:49:30.874125459Z",
"version": 1,
"project": "anthropic-proxy"
},
"spec": {
"display": {
"name": "Anthropic Proxy"
},
"datasources": {
"vm": {
"default": true,
"plugin": {
"kind": "PrometheusDatasource",
"spec": {
"directUrl": "http://localhost:9428"
}
}
}
},
"panels": {
"latency": {
"kind": "Panel",
"spec": {
"display": {
"name": "Latency"
},
"plugin": {
"kind": "TimeSeriesChart",
"spec": {
"legend": {
"position": "bottom"
},
"yAxis": {
"format": {
"unit": "milliseconds"
}
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "histogram_quantile(0.50, rate(proxy_request_duration_ms_milliseconds_bucket[5m]))",
"seriesNameFormat": "p50"
}
}
}
},
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "histogram_quantile(0.95, rate(proxy_request_duration_ms_milliseconds_bucket[5m]))",
"seriesNameFormat": "p95"
}
}
}
},
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "histogram_quantile(0.99, rate(proxy_request_duration_ms_milliseconds_bucket[5m]))",
"seriesNameFormat": "p99"
}
}
}
}
]
}
},
"request_rate": {
"kind": "Panel",
"spec": {
"display": {
"name": "Request Rate"
},
"plugin": {
"kind": "TimeSeriesChart",
"spec": {
"legend": {
"position": "bottom"
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "rate(proxy_request_count_total[5m])",
"seriesNameFormat": "req/s"
}
}
}
}
]
}
},
"token_rate": {
"kind": "Panel",
"spec": {
"display": {
"name": "Token Rate"
},
"plugin": {
"kind": "TimeSeriesChart",
"spec": {
"legend": {
"position": "bottom"
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "rate(proxy_tokens_input_total[5m]) * 60",
"seriesNameFormat": "input/min"
}
}
}
},
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "rate(proxy_tokens_output_total[5m]) * 60",
"seriesNameFormat": "output/min"
}
}
}
}
]
}
},
"tokens_5h": {
"kind": "Panel",
"spec": {
"display": {
"name": "5h Tokens"
},
"plugin": {
"kind": "StatChart",
"spec": {
"calculation": "last",
"format": {
"unit": "decimal"
},
"sparkline": {}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "increase(proxy_tokens_output_total[3h])"
}
}
}
}
]
}
},
"tokens_7d": {
"kind": "Panel",
"spec": {
"display": {
"name": "7d Tokens"
},
"plugin": {
"kind": "StatChart",
"spec": {
"calculation": "last",
"format": {
"unit": "decimal"
},
"sparkline": {}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "increase(proxy_tokens_output_total[9h])"
}
}
}
}
]
}
},
"util_5h": {
"kind": "Panel",
"spec": {
"display": {
"name": "5h Utilization"
},
"plugin": {
"kind": "GaugeChart",
"spec": {
"calculation": "last",
"format": {
"unit": "percent"
},
"thresholds": {
"steps": [
{
"color": "green",
"value": 0
},
{
"color": "orange",
"value": 70
},
{
"color": "red",
"value": 90
}
]
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "proxy_usage_utilization{window=\"5h\"}"
}
}
}
}
]
}
},
"util_7d": {
"kind": "Panel",
"spec": {
"display": {
"name": "7d Utilization"
},
"plugin": {
"kind": "GaugeChart",
"spec": {
"calculation": "last",
"format": {
"unit": "percent"
},
"thresholds": {
"steps": [
{
"color": "green",
"value": 0
},
{
"color": "orange",
"value": 70
},
{
"color": "red",
"value": 90
}
]
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "proxy_usage_utilization{window=\"7d\"}"
}
}
}
}
]
}
}
},
"layouts": [
{
"kind": "Grid",
"spec": {
"display": {
"title": "Utilization"
},
"items": [
{
"x": 0,
"y": 0,
"width": 6,
"height": 5,
"content": {
"$ref": "#/spec/panels/util_5h"
}
},
{
"x": 6,
"y": 0,
"width": 6,
"height": 5,
"content": {
"$ref": "#/spec/panels/util_7d"
}
},
{
"x": 12,
"y": 0,
"width": 6,
"height": 5,
"content": {
"$ref": "#/spec/panels/tokens_5h"
}
},
{
"x": 18,
"y": 0,
"width": 6,
"height": 5,
"content": {
"$ref": "#/spec/panels/tokens_7d"
}
}
]
}
},
{
"kind": "Grid",
"spec": {
"display": {
"title": "Traffic"
},
"items": [
{
"x": 0,
"y": 0,
"width": 12,
"height": 8,
"content": {
"$ref": "#/spec/panels/request_rate"
}
},
{
"x": 12,
"y": 0,
"width": 12,
"height": 8,
"content": {
"$ref": "#/spec/panels/latency"
}
}
]
}
},
{
"kind": "Grid",
"spec": {
"display": {
"title": "Tokens"
},
"items": [
{
"x": 0,
"y": 0,
"width": 24,
"height": 8,
"content": {
"$ref": "#/spec/panels/token_rate"
}
}
]
}
}
],
"duration": "1h",
"refreshInterval": "10s"
}
}
flake.lock
Generated
+3 -3
View File
@@ -20,11 +20,11 @@
},
"nixpkgs": {
"locked": {
"lastModified": 1775710090,
"narHash": "sha256-ar3rofg+awPB8QXDaFJhJ2jJhu+KqN/PRCXeyuXR76E=",
"lastModified": 1776169885,
"narHash": "sha256-l/iNYDZ4bGOAFQY2q8y5OAfBBtrDAaPuRQqWaFHVRXM=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "4c1018dae018162ec878d42fec712642d214fdfa",
"rev": "4bd9165a9165d7b5e33ae57f3eecbcb28fb231c9",
"type": "github"
},
"original": {
go.mod
+11 -2
View File
@@ -5,6 +5,7 @@ go 1.26
require (
github.com/gin-gonic/gin v1.12.0
github.com/google/uuid v1.6.0
github.com/prometheus/client_golang v1.23.2
github.com/refraction-networking/utls v1.8.2
github.com/rs/zerolog v1.35.0
github.com/tidwall/gjson v1.18.0
@@ -14,13 +15,13 @@ require (
go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.19.0
go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.43.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.43.0
go.opentelemetry.io/otel/exporters/prometheus v0.65.0
go.opentelemetry.io/otel/log v0.19.0
go.opentelemetry.io/otel/metric v1.43.0
go.opentelemetry.io/otel/sdk v1.43.0
go.opentelemetry.io/otel/sdk/log v0.19.0
go.opentelemetry.io/otel/sdk/metric v1.43.0
golang.org/x/net v0.52.0
google.golang.org/grpc v1.80.0
gopkg.in/lumberjack.v2 v2.0.0
gopkg.in/yaml.v3 v3.0.1
)
@@ -28,6 +29,7 @@ require (
require (
github.com/BurntSushi/toml v1.6.0 // indirect
github.com/andybalholm/brotli v1.0.6 // indirect
github.com/beorn7/perks v1.0.1 // indirect
github.com/bytedance/gopkg v0.1.4 // indirect
github.com/bytedance/sonic v1.15.0 // indirect
github.com/bytedance/sonic/loader v0.5.1 // indirect
@@ -45,14 +47,19 @@ require (
github.com/goccy/go-yaml v1.19.2 // indirect
github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect
github.com/json-iterator/go v1.1.12 // indirect
github.com/klauspost/compress v1.17.6 // indirect
github.com/klauspost/compress v1.18.0 // indirect
github.com/klauspost/cpuid/v2 v2.3.0 // indirect
github.com/leodido/go-urn v1.4.0 // indirect
github.com/mattn/go-colorable v0.1.14 // indirect
github.com/mattn/go-isatty v0.0.20 // indirect
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
github.com/modern-go/reflect2 v1.0.2 // indirect
github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
github.com/pelletier/go-toml/v2 v2.3.0 // indirect
github.com/prometheus/client_model v0.6.2 // indirect
github.com/prometheus/common v0.67.5 // indirect
github.com/prometheus/otlptranslator v1.0.0 // indirect
github.com/prometheus/procfs v0.20.1 // indirect
github.com/quic-go/qpack v0.6.0 // indirect
github.com/quic-go/quic-go v0.59.0 // indirect
github.com/tidwall/match v1.1.1 // indirect
@@ -64,12 +71,14 @@ require (
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0 // indirect
go.opentelemetry.io/otel/trace v1.43.0 // indirect
go.opentelemetry.io/proto/otlp v1.10.0 // indirect
go.yaml.in/yaml/v2 v2.4.4 // indirect
golang.org/x/arch v0.25.0 // indirect
golang.org/x/crypto v0.49.0 // indirect
golang.org/x/sys v0.42.0 // indirect
golang.org/x/text v0.35.0 // indirect
google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 // indirect
google.golang.org/grpc v1.80.0 // indirect
google.golang.org/protobuf v1.36.11 // indirect
gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
go.sum
+22 -2
View File
@@ -2,6 +2,8 @@ github.com/BurntSushi/toml v1.6.0 h1:dRaEfpa2VI55EwlIW72hMRHdWouJeRF7TPYhI+AUQjk
github.com/BurntSushi/toml v1.6.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
github.com/andybalholm/brotli v1.0.6 h1:Yf9fFpf49Zrxb9NlQaluyE92/+X7UVHlhMNJN2sxfOI=
github.com/andybalholm/brotli v1.0.6/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bytedance/gopkg v0.1.4 h1:oZnQwnX82KAIWb7033bEwtxvTqXcYMxDBaQxo5JJHWM=
github.com/bytedance/gopkg v0.1.4/go.mod h1:v1zWfPm21Fb+OsyXN2VAHdL6TBb2L88anLQgdyje6R4=
github.com/bytedance/sonic v1.15.0 h1:/PXeWFaR5ElNcVE84U0dOHjiMHQOwNIx3K4ymzh/uSE=
@@ -51,14 +53,16 @@ github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 h1:HWRh5R2+9EifMyIHV7ZV+MIZqgz
github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0/go.mod h1:JfhWUomR1baixubs02l85lZYYOm7LV6om4ceouMv45c=
github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
github.com/klauspost/compress v1.17.6 h1:60eq2E/jlfwQXtvZEeBUYADs+BwKBWURIY+Gj2eRGjI=
github.com/klauspost/compress v1.17.6/go.mod h1:/dCuZOvVtNoHsyb+cuJD3itjs3NbnF6KH9zAO4BDxPM=
github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=
github.com/klauspost/cpuid/v2 v2.3.0/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
github.com/mattn/go-colorable v0.1.14 h1:9A9LHSqF/7dyVVX6g0U9cwm9pG3kP9gSzcuIPHPsaIE=
@@ -70,10 +74,22 @@ github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9Gz0M=
github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
github.com/pelletier/go-toml/v2 v2.3.0 h1:k59bC/lIZREW0/iVaQR8nDHxVq8OVlIzYCOJf421CaM=
github.com/pelletier/go-toml/v2 v2.3.0/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
github.com/prometheus/client_model v0.6.2/go.mod h1:y3m2F6Gdpfy6Ut/GBsUqTWZqCUvMVzSfMLjcu6wAwpE=
github.com/prometheus/common v0.67.5 h1:pIgK94WWlQt1WLwAC5j2ynLaBRDiinoAb86HZHTUGI4=
github.com/prometheus/common v0.67.5/go.mod h1:SjE/0MzDEEAyrdr5Gqc6G+sXI67maCxzaT3A2+HqjUw=
github.com/prometheus/otlptranslator v1.0.0 h1:s0LJW/iN9dkIH+EnhiD3BlkkP5QVIUVEoIwkU+A6qos=
github.com/prometheus/otlptranslator v1.0.0/go.mod h1:vRYWnXvI6aWGpsdY/mOT/cbeVRBlPWtBNDb7kGR3uKM=
github.com/prometheus/procfs v0.20.1 h1:XwbrGOIplXW/AU3YhIhLODXMJYyC1isLFfYCsTEycfc=
github.com/prometheus/procfs v0.20.1/go.mod h1:o9EMBZGRyvDrSPH1RqdxhojkuXstoe4UlK79eF5TGGo=
github.com/quic-go/qpack v0.6.0 h1:g7W+BMYynC1LbYLSqRt8PBg5Tgwxn214ZZR34VIOjz8=
github.com/quic-go/qpack v0.6.0/go.mod h1:lUpLKChi8njB4ty2bFLX2x4gzDqXwUpaO1DP9qMDZII=
github.com/quic-go/quic-go v0.59.0 h1:OLJkp1Mlm/aS7dpKgTc6cnpynnD2Xg7C1pwL6vy/SAw=
@@ -126,6 +142,8 @@ go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0 h1:88Y4s2C8oTui1LGM6bT
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0/go.mod h1:Vl1/iaggsuRlrHf/hfPJPvVag77kKyvrLeD10kpMl+A=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.43.0 h1:RAE+JPfvEmvy+0LzyUA25/SGawPwIUbZ6u0Wug54sLc=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.43.0/go.mod h1:AGmbycVGEsRx9mXMZ75CsOyhSP6MFIcj/6dnG+vhVjk=
go.opentelemetry.io/otel/exporters/prometheus v0.65.0 h1:jOveH/b4lU9HT7y+Gfamf18BqlOuz2PWEvs8yM7Q6XE=
go.opentelemetry.io/otel/exporters/prometheus v0.65.0/go.mod h1:i1P8pcumauPtUI4YNopea1dhzEMuEqWP1xoUZDylLHo=
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.43.0 h1:mS47AX77OtFfKG4vtp+84kuGSFZHTyxtXIN269vChY0=
go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.43.0/go.mod h1:PJnsC41lAGncJlPUniSwM81gc80GkgWJWr3cu2nKEtU=
go.opentelemetry.io/otel/log v0.19.0 h1:KUZs/GOsw79TBBMfDWsXS+KZ4g2Ckzksd1ymzsIEbo4=
@@ -148,6 +166,8 @@ go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
go.uber.org/mock v0.6.0 h1:hyF9dfmbgIX5EfOdasqLsWD6xqpNZlXblLB/Dbnwv3Y=
go.uber.org/mock v0.6.0/go.mod h1:KiVJ4BqZJaMj4svdfmHM0AUx4NJYO8ZNpPnZn1Z+BBU=
go.yaml.in/yaml/v2 v2.4.4 h1:tuyd0P+2Ont/d6e2rl3be67goVK4R6deVxCUX5vyPaQ=
go.yaml.in/yaml/v2 v2.4.4/go.mod h1:gMZqIpDtDqOfM0uNfy0SkpRhvUryYH0Z6wdMYcacYXQ=
golang.org/x/arch v0.25.0 h1:qnk6Ksugpi5Bz32947rkUgDt9/s5qvqDPl/gBKdMJLE=
golang.org/x/arch v0.25.0/go.mod h1:0X+GdSIP+kL5wPmpK7sdkEVTt2XoYP0cSjQSbZBwOi8=
golang.org/x/crypto v0.49.0 h1:+Ng2ULVvLHnJ/ZFEq4KdcDd/cfjrrjjNSXNzxg0Y4U4=
internal/auth/credentials.go
+56
View File
@@ -0,0 +1,56 @@
package auth
import (
"encoding/json"
"fmt"
"os"
"time"
)
// claudeCredentialsJSON matches the structure of ~/.claude/.credentials.json.
type claudeCredentialsJSON struct {
ClaudeAiOauth struct {
AccessToken string `json:"accessToken"`
RefreshToken string `json:"refreshToken"`
ExpiresAt int64 `json:"expiresAt"`
SubscriptionType string `json:"subscriptionType"`
} `json:"claudeAiOauth"`
}
// LoadDefaultCredentials reads credentials from ~/.claude/.credentials.json.
// Returns nil, nil if the file does not exist.
func LoadDefaultCredentials() ([]*Credential, error) {
path, err := DefaultCredentialPath()
if err != nil {
return nil, nil
}
data, err := os.ReadFile(path)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
var cf claudeCredentialsJSON
if err := json.Unmarshal(data, &cf); err != nil {
return nil, err
}
oauth := cf.ClaudeAiOauth
if oauth.AccessToken == "" {
return nil, fmt.Errorf("no access token in %s", path)
}
cred := &Credential{
ID: "claude-native",
Email: oauth.SubscriptionType,
AccessToken: oauth.AccessToken,
RefreshToken: oauth.RefreshToken,
ExpiresAt: time.UnixMilli(oauth.ExpiresAt),
FilePath: path,
}
return []*Credential{cred}, nil
}
internal/auth/credentials_test.go
+70
View File
@@ -0,0 +1,70 @@
package auth
import (
"encoding/json"
"os"
"path/filepath"
"strings"
"testing"
)
func TestDefaultCredentialPath(t *testing.T) {
path, err := DefaultCredentialPath()
if err != nil {
t.Fatalf("DefaultCredentialPath error: %v", err)
}
if !strings.HasSuffix(path, filepath.Join(".claude", ".credentials.json")) {
t.Errorf("path = %q, want suffix .claude/.credentials.json", path)
}
}
func TestLoadDefaultCredentials_MissingFile(t *testing.T) {
// When credential file doesn't exist, returns nil, nil
path, err := DefaultCredentialPath()
if err != nil {
t.Skip("cannot determine home dir")
}
if _, statErr := os.Stat(path); os.IsNotExist(statErr) {
creds, err := LoadDefaultCredentials()
if creds != nil {
t.Errorf("expected nil creds for missing file, got %v", creds)
}
if err != nil {
t.Errorf("expected nil error for missing file, got %v", err)
}
}
}
func TestClaudeCredentialsJSON_ParsesCorrectly(t *testing.T) {
jsonData := `{"claudeAiOauth":{"accessToken":"test-token","refreshToken":"test-refresh","expiresAt":1234567890,"subscriptionType":"pro"}}`
var cf claudeCredentialsJSON
if err := json.Unmarshal([]byte(jsonData), &cf); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if cf.ClaudeAiOauth.AccessToken != "test-token" {
t.Errorf("AccessToken = %q, want test-token", cf.ClaudeAiOauth.AccessToken)
}
if cf.ClaudeAiOauth.RefreshToken != "test-refresh" {
t.Errorf("RefreshToken = %q, want test-refresh", cf.ClaudeAiOauth.RefreshToken)
}
if cf.ClaudeAiOauth.ExpiresAt != 1234567890 {
t.Errorf("ExpiresAt = %d, want 1234567890", cf.ClaudeAiOauth.ExpiresAt)
}
if cf.ClaudeAiOauth.SubscriptionType != "pro" {
t.Errorf("SubscriptionType = %q, want pro", cf.ClaudeAiOauth.SubscriptionType)
}
}
func TestClaudeCredentialsJSON_EmptyAccessToken(t *testing.T) {
jsonData := `{"claudeAiOauth":{"accessToken":"","refreshToken":"r","expiresAt":1}}`
var cf claudeCredentialsJSON
if err := json.Unmarshal([]byte(jsonData), &cf); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if cf.ClaudeAiOauth.AccessToken != "" {
t.Errorf("expected empty access token")
}
}
internal/auth/refresh.go
+3 -66
View File
@@ -6,16 +6,14 @@ import (
"encoding/json"
"fmt"
"io"
"net"
"net/http"
"os"
"path/filepath"
"sync"
"time"
tls "github.com/refraction-networking/utls"
"github.com/rs/zerolog/log"
"golang.org/x/net/http2"
"github.com/fujin/anthropic-proxy/internal/transport"
)
const (
@@ -28,7 +26,7 @@ const (
refreshBackoff = 5 * time.Minute
)
var utlsClient = newUTLSClient()
var utlsClient = transport.NewHTTPClient(15 * time.Second)
type tokenRequest struct {
ClientID string `json:"client_id"`
@@ -147,67 +145,6 @@ func persistCredential(cred *Credential) error {
return os.WriteFile(filePath, out, 0600)
}
func newUTLSClient() *http.Client {
return &http.Client{
Timeout: 15 * time.Second,
Transport: &utlsRefreshTransport{},
}
}
type utlsRefreshTransport struct {
mu sync.Mutex
conn *http2.ClientConn
host string
}
func (t *utlsRefreshTransport) RoundTrip(req *http.Request) (*http.Response, error) {
host := req.URL.Hostname()
port := req.URL.Port()
if port == "" {
port = "443"
}
t.mu.Lock()
if t.conn != nil && t.host == host && t.conn.CanTakeNewRequest() {
conn := t.conn
t.mu.Unlock()
resp, err := conn.RoundTrip(req)
if err == nil {
return resp, nil
}
t.mu.Lock()
t.conn = nil
t.mu.Unlock()
} else {
t.mu.Unlock()
}
addr := net.JoinHostPort(host, port)
rawConn, err := net.DialTimeout("tcp", addr, 10*time.Second)
if err != nil {
return nil, err
}
tlsConn := tls.UClient(rawConn, &tls.Config{ServerName: host}, tls.HelloChrome_Auto)
if err := tlsConn.Handshake(); err != nil {
rawConn.Close()
return nil, err
}
h2Conn, err := (&http2.Transport{}).NewClientConn(tlsConn)
if err != nil {
tlsConn.Close()
return nil, err
}
t.mu.Lock()
t.conn = h2Conn
t.host = host
t.mu.Unlock()
return h2Conn.RoundTrip(req)
}
func StartBackgroundRefresh(ctx context.Context, pool *Pool) {
go func() {
for {
internal/auth/selector_test.go
+318
View File
@@ -0,0 +1,318 @@
package auth
import (
"testing"
"time"
)
func TestNewPool(t *testing.T) {
creds := []*Credential{
{ID: "a", AccessToken: "tok-a"},
{ID: "b", AccessToken: "tok-b"},
}
p := NewPool(creds)
if p == nil {
t.Fatal("NewPool returned nil")
}
if len(p.creds) != 2 {
t.Errorf("pool has %d creds, want 2", len(p.creds))
}
if p.cursor != 0 {
t.Errorf("initial cursor = %d, want 0", p.cursor)
}
}
func TestPool_Pick_EmptyPool(t *testing.T) {
p := NewPool(nil)
_, err := p.Pick()
if err == nil {
t.Fatal("expected error from empty pool, got nil")
}
want := "no credentials available"
if err.Error() != want {
t.Errorf("error = %q, want %q", err.Error(), want)
}
}
func TestPool_Pick_SingleCredential(t *testing.T) {
cred := &Credential{ID: "only", AccessToken: "tok-only"}
p := NewPool([]*Credential{cred})
got, err := p.Pick()
if err != nil {
t.Fatalf("Pick() error = %v", err)
}
if got.ID != "only" {
t.Errorf("Pick() returned cred ID %q, want %q", got.ID, "only")
}
// Picking again should return the same credential
got2, err := p.Pick()
if err != nil {
t.Fatalf("second Pick() error = %v", err)
}
if got2.ID != "only" {
t.Errorf("second Pick() returned cred ID %q, want %q", got2.ID, "only")
}
}
func TestPool_Pick_RoundRobin(t *testing.T) {
creds := []*Credential{
{ID: "a"},
{ID: "b"},
{ID: "c"},
}
p := NewPool(creds)
// Should cycle through a, b, c, a, b, c
expected := []string{"a", "b", "c", "a", "b", "c"}
for i, want := range expected {
got, err := p.Pick()
if err != nil {
t.Fatalf("Pick() #%d error = %v", i, err)
}
if got.ID != want {
t.Errorf("Pick() #%d = %q, want %q", i, got.ID, want)
}
}
}
func TestPool_Pick_SkipsCooldown(t *testing.T) {
creds := []*Credential{
{ID: "a"},
{ID: "b", cooldownUntil: time.Now().Add(1 * time.Hour)},
{ID: "c"},
}
p := NewPool(creds)
// First pick: "a" (index 0, not on cooldown)
got, err := p.Pick()
if err != nil {
t.Fatalf("Pick() #1 error = %v", err)
}
if got.ID != "a" {
t.Errorf("Pick() #1 = %q, want %q", got.ID, "a")
}
// Second pick: cursor at 1, but "b" is on cooldown → skip to "c"
got, err = p.Pick()
if err != nil {
t.Fatalf("Pick() #2 error = %v", err)
}
if got.ID != "c" {
t.Errorf("Pick() #2 = %q, want %q", got.ID, "c")
}
// Third pick: cursor advanced past "c" to 0 → "a"
got, err = p.Pick()
if err != nil {
t.Fatalf("Pick() #3 error = %v", err)
}
if got.ID != "a" {
t.Errorf("Pick() #3 = %q, want %q", got.ID, "a")
}
}
func TestPool_Pick_AllOnCooldown(t *testing.T) {
future := time.Now().Add(1 * time.Hour)
creds := []*Credential{
{ID: "a", cooldownUntil: future},
{ID: "b", cooldownUntil: future},
}
p := NewPool(creds)
_, err := p.Pick()
if err == nil {
t.Fatal("expected error when all on cooldown, got nil")
}
want := "all 2 credentials are on cooldown"
if err.Error() != want {
t.Errorf("error = %q, want %q", err.Error(), want)
}
}
func TestPool_MarkFailure(t *testing.T) {
tests := []struct {
name string
statusCode int
expectCooldown bool
expectedDur time.Duration
}{
{
name: "429 sets 30s cooldown",
statusCode: 429,
expectCooldown: true,
expectedDur: 30 * time.Second,
},
{
name: "500 sets 5s cooldown",
statusCode: 500,
expectCooldown: true,
expectedDur: 5 * time.Second,
},
{
name: "502 sets 5s cooldown",
statusCode: 502,
expectCooldown: true,
expectedDur: 5 * time.Second,
},
{
name: "503 sets 5s cooldown",
statusCode: 503,
expectCooldown: true,
expectedDur: 5 * time.Second,
},
{
name: "400 does NOT set cooldown",
statusCode: 400,
expectCooldown: false,
},
{
name: "401 does NOT set cooldown",
statusCode: 401,
expectCooldown: false,
},
{
name: "403 does NOT set cooldown",
statusCode: 403,
expectCooldown: false,
},
{
name: "404 does NOT set cooldown",
statusCode: 404,
expectCooldown: false,
},
{
name: "422 does NOT set cooldown",
statusCode: 422,
expectCooldown: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
cred := &Credential{ID: "test"}
p := NewPool([]*Credential{cred})
before := time.Now()
p.MarkFailure(cred, tt.statusCode)
if tt.expectCooldown {
if !cred.IsOnCooldown() {
t.Errorf("expected cooldown after status %d", tt.statusCode)
}
// Verify approximate duration
cred.mu.Lock()
cooldownEnd := cred.cooldownUntil
cred.mu.Unlock()
lower := before.Add(tt.expectedDur)
upper := time.Now().Add(tt.expectedDur)
if cooldownEnd.Before(lower) || cooldownEnd.After(upper) {
t.Errorf("cooldownUntil %v not in expected range [%v, %v]", cooldownEnd, lower, upper)
}
} else {
if cred.IsOnCooldown() {
t.Errorf("did not expect cooldown after status %d", tt.statusCode)
}
}
})
}
}
func TestPool_MarkSuccess(t *testing.T) {
cred := &Credential{
ID: "test",
cooldownUntil: time.Now().Add(1 * time.Hour),
}
p := NewPool([]*Credential{cred})
if !cred.IsOnCooldown() {
t.Fatal("precondition: expected credential to be on cooldown")
}
p.MarkSuccess(cred)
if cred.IsOnCooldown() {
t.Error("expected cooldown to be cleared after MarkSuccess")
}
}
func TestPool_RoundRobinCursorAdvancement(t *testing.T) {
creds := []*Credential{
{ID: "0"},
{ID: "1"},
{ID: "2"},
}
p := NewPool(creds)
// Verify cursor starts at 0
if p.cursor != 0 {
t.Fatalf("initial cursor = %d, want 0", p.cursor)
}
// Pick cred[0], cursor should advance to 1
got, _ := p.Pick()
if got.ID != "0" {
t.Errorf("first pick = %q, want %q", got.ID, "0")
}
if p.cursor != 1 {
t.Errorf("cursor after first pick = %d, want 1", p.cursor)
}
// Pick cred[1], cursor should advance to 2
got, _ = p.Pick()
if got.ID != "1" {
t.Errorf("second pick = %q, want %q", got.ID, "1")
}
if p.cursor != 2 {
t.Errorf("cursor after second pick = %d, want 2", p.cursor)
}
// Pick cred[2], cursor should wrap to 0
got, _ = p.Pick()
if got.ID != "2" {
t.Errorf("third pick = %q, want %q", got.ID, "2")
}
if p.cursor != 0 {
t.Errorf("cursor after third pick = %d, want 0 (wrap)", p.cursor)
}
}
func TestPool_RoundRobinWithCooldownSkip(t *testing.T) {
creds := []*Credential{
{ID: "0"},
{ID: "1", cooldownUntil: time.Now().Add(1 * time.Hour)},
{ID: "2"},
}
p := NewPool(creds)
// First pick: cred[0]
got, _ := p.Pick()
if got.ID != "0" {
t.Errorf("first pick = %q, want %q", got.ID, "0")
}
// Cursor should be at 1
if p.cursor != 1 {
t.Errorf("cursor after first pick = %d, want 1", p.cursor)
}
// Second pick: cursor at 1, but cred[1] on cooldown → skip to cred[2]
got, _ = p.Pick()
if got.ID != "2" {
t.Errorf("second pick = %q, want %q", got.ID, "2")
}
// Cursor should advance past cred[2] to 0
if p.cursor != 0 {
t.Errorf("cursor after second pick (skip) = %d, want 0", p.cursor)
}
// Third pick: cursor at 0, cred[0] available
got, _ = p.Pick()
if got.ID != "0" {
t.Errorf("third pick = %q, want %q", got.ID, "0")
}
if p.cursor != 1 {
t.Errorf("cursor after third pick = %d, want 1", p.cursor)
}
}
internal/auth/types.go
+4 -4
View File
@@ -13,7 +13,7 @@ type Credential struct {
RefreshToken string
ExpiresAt time.Time
FilePath string
CooldownUntil time.Time
cooldownUntil time.Time
nextRefreshAfter time.Time
mu sync.Mutex
}
@@ -22,21 +22,21 @@ type Credential struct {
func (c *Credential) IsOnCooldown() bool {
c.mu.Lock()
defer c.mu.Unlock()
return time.Now().Before(c.CooldownUntil)
return time.Now().Before(c.cooldownUntil)
}
// SetCooldown puts the credential on cooldown for the given duration.
func (c *Credential) SetCooldown(duration time.Duration) {
c.mu.Lock()
defer c.mu.Unlock()
c.CooldownUntil = time.Now().Add(duration)
c.cooldownUntil = time.Now().Add(duration)
}
// ClearCooldown removes any active cooldown on the credential.
func (c *Credential) ClearCooldown() {
c.mu.Lock()
defer c.mu.Unlock()
c.CooldownUntil = time.Time{}
c.cooldownUntil = time.Time{}
}
// Token returns the current access token.
internal/auth/types_test.go
+167
View File
@@ -0,0 +1,167 @@
package auth
import (
"sync"
"testing"
"time"
)
func TestCredential_IsOnCooldown(t *testing.T) {
tests := []struct {
name string
cooldownUntil time.Time
want bool
}{
{
name: "zero time — not on cooldown",
cooldownUntil: time.Time{},
want: false,
},
{
name: "future time — on cooldown",
cooldownUntil: time.Now().Add(1 * time.Hour),
want: true,
},
{
name: "past time — expired cooldown",
cooldownUntil: time.Now().Add(-1 * time.Hour),
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c := &Credential{cooldownUntil: tt.cooldownUntil}
got := c.IsOnCooldown()
if got != tt.want {
t.Errorf("IsOnCooldown() = %v, want %v", got, tt.want)
}
})
}
}
func TestCredential_SetCooldown(t *testing.T) {
tests := []struct {
name string
duration time.Duration
}{
{name: "30 second cooldown", duration: 30 * time.Second},
{name: "5 second cooldown", duration: 5 * time.Second},
{name: "1 minute cooldown", duration: 1 * time.Minute},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c := &Credential{}
before := time.Now()
c.SetCooldown(tt.duration)
after := time.Now()
// cooldownUntil should be between before+duration and after+duration
if c.cooldownUntil.Before(before.Add(tt.duration)) {
t.Errorf("cooldownUntil %v is before expected lower bound %v", c.cooldownUntil, before.Add(tt.duration))
}
if c.cooldownUntil.After(after.Add(tt.duration)) {
t.Errorf("cooldownUntil %v is after expected upper bound %v", c.cooldownUntil, after.Add(tt.duration))
}
// Should now be on cooldown
if !c.IsOnCooldown() {
t.Error("expected credential to be on cooldown after SetCooldown")
}
})
}
}
func TestCredential_ClearCooldown(t *testing.T) {
t.Run("clears active cooldown", func(t *testing.T) {
c := &Credential{cooldownUntil: time.Now().Add(1 * time.Hour)}
if !c.IsOnCooldown() {
t.Fatal("precondition: expected credential to be on cooldown")
}
c.ClearCooldown()
if c.IsOnCooldown() {
t.Error("expected credential to not be on cooldown after ClearCooldown")
}
if !c.cooldownUntil.IsZero() {
t.Errorf("expected cooldownUntil to be zero time, got %v", c.cooldownUntil)
}
})
t.Run("clearing when not on cooldown is no-op", func(t *testing.T) {
c := &Credential{}
c.ClearCooldown()
if c.IsOnCooldown() {
t.Error("expected credential to not be on cooldown")
}
if !c.cooldownUntil.IsZero() {
t.Errorf("expected cooldownUntil to be zero time, got %v", c.cooldownUntil)
}
})
}
func TestCredential_Token(t *testing.T) {
tests := []struct {
name string
token string
}{
{name: "returns access token", token: "sk-ant-abc123"},
{name: "empty token", token: ""},
{name: "long token", token: "sk-ant-" + string(make([]byte, 200))},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c := &Credential{AccessToken: tt.token}
got := c.Token()
if got != tt.token {
t.Errorf("Token() = %q, want %q", got, tt.token)
}
})
}
}
func TestCredential_ConcurrentAccess(t *testing.T) {
c := &Credential{
AccessToken: "initial-token",
}
var wg sync.WaitGroup
const goroutines = 50
// Spawn goroutines that concurrently read and write
for i := 0; i < goroutines; i++ {
wg.Add(3)
go func() {
defer wg.Done()
_ = c.Token()
}()
go func() {
defer wg.Done()
c.SetCooldown(1 * time.Second)
}()
go func() {
defer wg.Done()
_ = c.IsOnCooldown()
}()
}
// Also mix in ClearCooldown calls
for i := 0; i < goroutines/2; i++ {
wg.Add(1)
go func() {
defer wg.Done()
c.ClearCooldown()
}()
}
wg.Wait()
// If we get here without -race detecting issues, mutex is working
}
internal/config/config.go
+28 -58
View File
@@ -1,12 +1,9 @@
package config
import (
"encoding/json"
"fmt"
"os"
"time"
"github.com/fujin/anthropic-proxy/internal/auth"
"gopkg.in/yaml.v3"
)
@@ -36,13 +33,27 @@ type ReplaceRule struct {
}
type TelemetryConfig struct {
Export ExportConfig `yaml:"export"`
Embedded EmbeddedConfig `yaml:"embedded"`
ServiceName string `yaml:"service_name"`
}
type ExportConfig struct {
Endpoint string `yaml:"endpoint"`
Insecure bool `yaml:"insecure"`
ServiceName string `yaml:"service_name"`
Headers map[string]string `yaml:"headers"`
}
func (t TelemetryConfig) ExportEnabled() bool { return t.Endpoint != "" }
func (e ExportConfig) Enabled() bool { return e.Endpoint != "" }
type EmbeddedConfig struct {
Enabled bool `yaml:"enabled"`
Port int `yaml:"port"`
PersesBinary string `yaml:"perses_binary"`
VMBinary string `yaml:"vm_binary"`
VMPort int `yaml:"vm_port"`
BinDir string `yaml:"bin_dir"`
}
type LoggingConfig struct {
Level string `yaml:"level"`
@@ -53,15 +64,6 @@ type LoggingConfig struct {
Compress bool `yaml:"compress"`
}
type claudeCredentialsJSON struct {
ClaudeAiOauth struct {
AccessToken string `json:"accessToken"`
RefreshToken string `json:"refreshToken"`
ExpiresAt int64 `json:"expiresAt"`
SubscriptionType string `json:"subscriptionType"`
} `json:"claudeAiOauth"`
}
func Load(path string) (*Config, error) {
data, err := os.ReadFile(path)
if err != nil {
@@ -89,6 +91,18 @@ func Load(path string) (*Config, error) {
if cfg.Telemetry.ServiceName == "" {
cfg.Telemetry.ServiceName = "anthropic-proxy"
}
if cfg.Telemetry.Embedded.Port == 0 {
cfg.Telemetry.Embedded.Port = 8080
}
if cfg.Telemetry.Embedded.PersesBinary == "" {
cfg.Telemetry.Embedded.PersesBinary = "perses"
}
if cfg.Telemetry.Embedded.VMBinary == "" {
cfg.Telemetry.Embedded.VMBinary = "victoria-metrics"
}
if cfg.Telemetry.Embedded.VMPort == 0 {
cfg.Telemetry.Embedded.VMPort = 8428
}
// Check for deprecated claude_credentials field
var rawCfg map[string]interface{}
@@ -102,47 +116,3 @@ func Load(path string) (*Config, error) {
return cfg, nil
}
func DefaultCredentialPath() string {
home, err := os.UserHomeDir()
if err != nil {
return ""
}
return home + "/.claude/.credentials.json"
}
func LoadDefaultCredentials() ([]*auth.Credential, error) {
path := DefaultCredentialPath()
if path == "" {
return nil, nil
}
data, err := os.ReadFile(path)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
var cf claudeCredentialsJSON
if err := json.Unmarshal(data, &cf); err != nil {
return nil, err
}
oauth := cf.ClaudeAiOauth
if oauth.AccessToken == "" {
return nil, fmt.Errorf("no access token in %s", path)
}
cred := &auth.Credential{
ID: "claude-native",
Email: oauth.SubscriptionType,
AccessToken: oauth.AccessToken,
RefreshToken: oauth.RefreshToken,
ExpiresAt: time.UnixMilli(oauth.ExpiresAt),
FilePath: path,
}
return []*auth.Credential{cred}, nil
}
internal/config/config_test.go
+270
View File
@@ -0,0 +1,270 @@
package config
import (
"os"
"path/filepath"
"strings"
"testing"
)
func TestLoad_AllFields(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "config.yaml")
yaml := `
port: 9090
api_keys:
- key1
- key2
claude_binary: /usr/bin/claude
sanitize:
tools:
- from: tool_a
to: tool_b
system:
- match: foo
replace: bar
body:
- match: baz
replace: qux
logging:
level: debug
file: /tmp/test.log
max_size_mb: 50
max_backups: 3
max_age_days: 7
compress: true
telemetry:
service_name: my-proxy
export:
endpoint: http://localhost:4317
insecure: true
headers:
x-token: abc
embedded:
enabled: true
port: 9999
perses_binary: /usr/bin/perses
vm_binary: /usr/bin/vm
vm_port: 9428
bin_dir: /opt/bin
`
if err := os.WriteFile(path, []byte(yaml), 0644); err != nil {
t.Fatal(err)
}
cfg, err := Load(path)
if err != nil {
t.Fatalf("Load returned error: %v", err)
}
if cfg.Port != 9090 {
t.Errorf("Port = %d, want 9090", cfg.Port)
}
if len(cfg.APIKeys) != 2 || cfg.APIKeys[0] != "key1" || cfg.APIKeys[1] != "key2" {
t.Errorf("APIKeys = %v, want [key1 key2]", cfg.APIKeys)
}
if cfg.ClaudeBinary != "/usr/bin/claude" {
t.Errorf("ClaudeBinary = %q, want /usr/bin/claude", cfg.ClaudeBinary)
}
// Sanitize
if len(cfg.Sanitize.Tools) != 1 || cfg.Sanitize.Tools[0].From != "tool_a" || cfg.Sanitize.Tools[0].To != "tool_b" {
t.Errorf("Sanitize.Tools = %v", cfg.Sanitize.Tools)
}
if len(cfg.Sanitize.System) != 1 || cfg.Sanitize.System[0].Match != "foo" {
t.Errorf("Sanitize.System = %v", cfg.Sanitize.System)
}
if len(cfg.Sanitize.Body) != 1 || cfg.Sanitize.Body[0].Match != "baz" {
t.Errorf("Sanitize.Body = %v", cfg.Sanitize.Body)
}
// Logging
if cfg.Logging.Level != "debug" {
t.Errorf("Logging.Level = %q, want debug", cfg.Logging.Level)
}
if cfg.Logging.File != "/tmp/test.log" {
t.Errorf("Logging.File = %q", cfg.Logging.File)
}
if cfg.Logging.MaxSizeMB != 50 {
t.Errorf("Logging.MaxSizeMB = %d, want 50", cfg.Logging.MaxSizeMB)
}
if cfg.Logging.MaxBackups != 3 {
t.Errorf("Logging.MaxBackups = %d, want 3", cfg.Logging.MaxBackups)
}
if cfg.Logging.MaxAgeDays != 7 {
t.Errorf("Logging.MaxAgeDays = %d, want 7", cfg.Logging.MaxAgeDays)
}
if !cfg.Logging.Compress {
t.Error("Logging.Compress = false, want true")
}
// Telemetry
if cfg.Telemetry.ServiceName != "my-proxy" {
t.Errorf("Telemetry.ServiceName = %q, want my-proxy", cfg.Telemetry.ServiceName)
}
if cfg.Telemetry.Export.Endpoint != "http://localhost:4317" {
t.Errorf("Export.Endpoint = %q", cfg.Telemetry.Export.Endpoint)
}
if !cfg.Telemetry.Export.Insecure {
t.Error("Export.Insecure = false, want true")
}
if !cfg.Telemetry.Export.Enabled() {
t.Error("Export.Enabled() = false, want true")
}
if cfg.Telemetry.Export.Headers["x-token"] != "abc" {
t.Errorf("Export.Headers = %v", cfg.Telemetry.Export.Headers)
}
// Embedded
if !cfg.Telemetry.Embedded.Enabled {
t.Error("Embedded.Enabled = false, want true")
}
if cfg.Telemetry.Embedded.Port != 9999 {
t.Errorf("Embedded.Port = %d, want 9999", cfg.Telemetry.Embedded.Port)
}
if cfg.Telemetry.Embedded.PersesBinary != "/usr/bin/perses" {
t.Errorf("Embedded.PersesBinary = %q", cfg.Telemetry.Embedded.PersesBinary)
}
if cfg.Telemetry.Embedded.VMBinary != "/usr/bin/vm" {
t.Errorf("Embedded.VMBinary = %q", cfg.Telemetry.Embedded.VMBinary)
}
if cfg.Telemetry.Embedded.VMPort != 9428 {
t.Errorf("Embedded.VMPort = %d, want 9428", cfg.Telemetry.Embedded.VMPort)
}
if cfg.Telemetry.Embedded.BinDir != "/opt/bin" {
t.Errorf("Embedded.BinDir = %q", cfg.Telemetry.Embedded.BinDir)
}
}
func TestLoad_Defaults(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "config.yaml")
// Minimal YAML — only api_keys
if err := os.WriteFile(path, []byte("api_keys:\n - k1\n"), 0644); err != nil {
t.Fatal(err)
}
cfg, err := Load(path)
if err != nil {
t.Fatalf("Load returned error: %v", err)
}
tests := []struct {
name string
got interface{}
want interface{}
}{
{"Port", cfg.Port, 8080},
{"Logging.Level", cfg.Logging.Level, "info"},
{"Logging.MaxSizeMB", cfg.Logging.MaxSizeMB, 100},
{"Logging.MaxBackups", cfg.Logging.MaxBackups, 5},
{"Logging.MaxAgeDays", cfg.Logging.MaxAgeDays, 30},
{"Telemetry.ServiceName", cfg.Telemetry.ServiceName, "anthropic-proxy"},
{"Embedded.Port", cfg.Telemetry.Embedded.Port, 8080},
{"Embedded.VMBinary", cfg.Telemetry.Embedded.VMBinary, "victoria-metrics"},
{"Embedded.PersesBinary", cfg.Telemetry.Embedded.PersesBinary, "perses"},
{"Embedded.VMPort", cfg.Telemetry.Embedded.VMPort, 8428},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.got != tt.want {
t.Errorf("got %v, want %v", tt.got, tt.want)
}
})
}
}
func TestLoad_MissingFile(t *testing.T) {
_, err := Load("/nonexistent/path/config.yaml")
if err == nil {
t.Fatal("expected error for missing file, got nil")
}
if !strings.Contains(err.Error(), "read config") {
t.Errorf("error = %q, want it to contain 'read config'", err.Error())
}
}
func TestLoad_DeprecatedClaudeCredentials(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "config.yaml")
yaml := `
api_keys:
- k1
claude_credentials: "/some/path"
`
if err := os.WriteFile(path, []byte(yaml), 0644); err != nil {
t.Fatal(err)
}
_, err := Load(path)
if err == nil {
t.Fatal("expected error for deprecated claude_credentials, got nil")
}
if !strings.Contains(err.Error(), "no longer supported") {
t.Errorf("error = %q, want it to contain 'no longer supported'", err.Error())
}
}
func TestLoad_EmptyClaudeCredentials(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "config.yaml")
// Empty string value should NOT trigger the deprecation error
yaml := `
api_keys:
- k1
claude_credentials: ""
`
if err := os.WriteFile(path, []byte(yaml), 0644); err != nil {
t.Fatal(err)
}
cfg, err := Load(path)
if err != nil {
t.Fatalf("empty claude_credentials should not error: %v", err)
}
if cfg.Port != 8080 {
t.Errorf("Port = %d, want 8080", cfg.Port)
}
}
func TestLoad_InvalidYAML(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "config.yaml")
// Truly invalid YAML that causes a parse error
if err := os.WriteFile(path, []byte("port:\n - bad\n indent: broken\n"), 0644); err != nil {
t.Fatal(err)
}
_, err := Load(path)
if err == nil {
t.Fatal("expected error for invalid YAML, got nil")
}
if !strings.Contains(err.Error(), "parse config") {
t.Errorf("error = %q, want it to contain 'parse config'", err.Error())
}
}
func TestExportConfig_Enabled(t *testing.T) {
tests := []struct {
name string
endpoint string
want bool
}{
{"empty endpoint", "", false},
{"set endpoint", "http://localhost:4317", true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
e := ExportConfig{Endpoint: tt.endpoint}
if got := e.Enabled(); got != tt.want {
t.Errorf("Enabled() = %v, want %v", got, tt.want)
}
})
}
}
internal/embedded/dashboard.go
+12
View File
@@ -0,0 +1,12 @@
package embedded
import (
"embed"
)
//go:embed dashboard/proxy.json
var dashboardFS embed.FS
func DashboardJSON() ([]byte, error) {
return dashboardFS.ReadFile("dashboard/proxy.json")
}
internal/embedded/dashboard/proxy.json
+450
View File
@@ -0,0 +1,450 @@
{
"kind": "Dashboard",
"metadata": {
"name": "proxy",
"createdAt": "2026-04-14T19:47:48.013238204Z",
"updatedAt": "2026-04-14T19:49:30.874125459Z",
"version": 1,
"project": "anthropic-proxy"
},
"spec": {
"display": {
"name": "Anthropic Proxy"
},
"datasources": {
"vm": {
"default": true,
"plugin": {
"kind": "PrometheusDatasource",
"spec": {
"directUrl": "http://localhost:9428"
}
}
}
},
"panels": {
"latency": {
"kind": "Panel",
"spec": {
"display": {
"name": "Latency"
},
"plugin": {
"kind": "TimeSeriesChart",
"spec": {
"legend": {
"position": "bottom"
},
"yAxis": {
"format": {
"unit": "milliseconds"
}
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "histogram_quantile(0.50, rate(proxy_request_duration_ms_milliseconds_bucket[5m]))",
"seriesNameFormat": "p50"
}
}
}
},
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "histogram_quantile(0.95, rate(proxy_request_duration_ms_milliseconds_bucket[5m]))",
"seriesNameFormat": "p95"
}
}
}
},
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "histogram_quantile(0.99, rate(proxy_request_duration_ms_milliseconds_bucket[5m]))",
"seriesNameFormat": "p99"
}
}
}
}
]
}
},
"request_rate": {
"kind": "Panel",
"spec": {
"display": {
"name": "Request Rate"
},
"plugin": {
"kind": "TimeSeriesChart",
"spec": {
"legend": {
"position": "bottom"
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "rate(proxy_request_count_total[5m])",
"seriesNameFormat": "req/s"
}
}
}
}
]
}
},
"token_rate": {
"kind": "Panel",
"spec": {
"display": {
"name": "Token Rate"
},
"plugin": {
"kind": "TimeSeriesChart",
"spec": {
"legend": {
"position": "bottom"
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "rate(proxy_tokens_input_total[5m]) * 60",
"seriesNameFormat": "input/min"
}
}
}
},
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "rate(proxy_tokens_output_total[5m]) * 60",
"seriesNameFormat": "output/min"
}
}
}
}
]
}
},
"tokens_5h": {
"kind": "Panel",
"spec": {
"display": {
"name": "5h Tokens"
},
"plugin": {
"kind": "StatChart",
"spec": {
"calculation": "last",
"format": {
"unit": "decimal"
},
"sparkline": {}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "increase(proxy_tokens_output_total[3h])"
}
}
}
}
]
}
},
"tokens_7d": {
"kind": "Panel",
"spec": {
"display": {
"name": "7d Tokens"
},
"plugin": {
"kind": "StatChart",
"spec": {
"calculation": "last",
"format": {
"unit": "decimal"
},
"sparkline": {}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "increase(proxy_tokens_output_total[9h])"
}
}
}
}
]
}
},
"util_5h": {
"kind": "Panel",
"spec": {
"display": {
"name": "5h Utilization"
},
"plugin": {
"kind": "GaugeChart",
"spec": {
"calculation": "last",
"format": {
"unit": "percent"
},
"thresholds": {
"steps": [
{
"color": "green",
"value": 0
},
{
"color": "orange",
"value": 70
},
{
"color": "red",
"value": 90
}
]
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "proxy_usage_utilization{window=\"5h\"}"
}
}
}
}
]
}
},
"util_7d": {
"kind": "Panel",
"spec": {
"display": {
"name": "7d Utilization"
},
"plugin": {
"kind": "GaugeChart",
"spec": {
"calculation": "last",
"format": {
"unit": "percent"
},
"thresholds": {
"steps": [
{
"color": "green",
"value": 0
},
{
"color": "orange",
"value": 70
},
{
"color": "red",
"value": 90
}
]
}
}
},
"queries": [
{
"kind": "TimeSeriesQuery",
"spec": {
"plugin": {
"kind": "PrometheusTimeSeriesQuery",
"spec": {
"datasource": {
"kind": "PrometheusDatasource",
"name": "vm"
},
"query": "proxy_usage_utilization{window=\"7d\"}"
}
}
}
}
]
}
}
},
"layouts": [
{
"kind": "Grid",
"spec": {
"display": {
"title": "Utilization"
},
"items": [
{
"x": 0,
"y": 0,
"width": 6,
"height": 5,
"content": {
"$ref": "#/spec/panels/util_5h"
}
},
{
"x": 6,
"y": 0,
"width": 6,
"height": 5,
"content": {
"$ref": "#/spec/panels/util_7d"
}
},
{
"x": 12,
"y": 0,
"width": 6,
"height": 5,
"content": {
"$ref": "#/spec/panels/tokens_5h"
}
},
{
"x": 18,
"y": 0,
"width": 6,
"height": 5,
"content": {
"$ref": "#/spec/panels/tokens_7d"
}
}
]
}
},
{
"kind": "Grid",
"spec": {
"display": {
"title": "Traffic"
},
"items": [
{
"x": 0,
"y": 0,
"width": 12,
"height": 8,
"content": {
"$ref": "#/spec/panels/request_rate"
}
},
{
"x": 12,
"y": 0,
"width": 12,
"height": 8,
"content": {
"$ref": "#/spec/panels/latency"
}
}
]
}
},
{
"kind": "Grid",
"spec": {
"display": {
"title": "Tokens"
},
"items": [
{
"x": 0,
"y": 0,
"width": 24,
"height": 8,
"content": {
"$ref": "#/spec/panels/token_rate"
}
}
]
}
}
],
"duration": "1h",
"refreshInterval": "10s"
}
}
internal/embedded/download.go
+155
View File
@@ -0,0 +1,155 @@
package embedded
import (
"archive/tar"
"compress/gzip"
"fmt"
"io"
"net/http"
"os"
"os/exec"
"path/filepath"
"runtime"
"github.com/rs/zerolog/log"
)
const cacheDir = ".cache/anthropic-proxy/bin"
var downloads = map[string]struct {
urlTemplate string
version string
extractName string
}{
"victoria-metrics": {
urlTemplate: "https://github.com/VictoriaMetrics/VictoriaMetrics/releases/download/v%s/victoria-metrics-%s-v%s.tar.gz",
version: "1.118.0",
extractName: "victoria-metrics-prod",
},
"perses": {
urlTemplate: "https://github.com/perses/perses/releases/download/v%s/perses_%s_%s_%s.tar.gz",
version: "0.53.1",
},
}
func ensureBinary(name, configPath, configBinDir string) (string, error) {
if configPath != "" {
if p, err := exec.LookPath(configPath); err == nil {
return p, nil
}
}
if p, err := exec.LookPath(name); err == nil {
return p, nil
}
binDir := configBinDir
if binDir == "" {
home, err := os.UserHomeDir()
if err != nil {
return "", fmt.Errorf("get home dir: %w", err)
}
binDir = filepath.Join(home, cacheDir)
}
cachedPath := filepath.Join(binDir, name)
if _, err := os.Stat(cachedPath); err == nil {
return cachedPath, nil
}
log.Info().Str("binary", name).Msg("downloading binary (first run)")
if err := os.MkdirAll(binDir, 0o755); err != nil {
return "", fmt.Errorf("create cache dir: %w", err)
}
url, err := downloadURL(name)
if err != nil {
return "", err
}
if err := extractAll(url, binDir); err != nil {
return "", fmt.Errorf("download %s: %w", name, err)
}
d := downloads[name]
if d.extractName != "" {
oldPath := filepath.Join(binDir, d.extractName)
if _, err := os.Stat(oldPath); err == nil {
os.Rename(oldPath, cachedPath)
}
}
if _, err := os.Stat(cachedPath); err != nil {
return "", fmt.Errorf("binary %s not found after extraction", name)
}
log.Info().Str("binary", name).Str("path", cachedPath).Msg("binary downloaded")
return cachedPath, nil
}
func downloadURL(name string) (string, error) {
goarch := runtime.GOARCH
goos := runtime.GOOS
d, ok := downloads[name]
if !ok {
return "", fmt.Errorf("unknown binary: %s", name)
}
switch name {
case "victoria-metrics":
vmOS := fmt.Sprintf("%s-%s", goos, goarch)
return fmt.Sprintf(d.urlTemplate, d.version, vmOS, d.version), nil
case "perses":
return fmt.Sprintf(d.urlTemplate, d.version, d.version, goos, goarch), nil
}
return "", fmt.Errorf("unknown binary: %s", name)
}
func extractAll(url, destDir string) error {
resp, err := http.Get(url)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return fmt.Errorf("download failed: HTTP %d from %s", resp.StatusCode, url)
}
gz, err := gzip.NewReader(resp.Body)
if err != nil {
return fmt.Errorf("gzip reader: %w", err)
}
defer gz.Close()
tr := tar.NewReader(gz)
for {
hdr, err := tr.Next()
if err == io.EOF {
return nil
}
if err != nil {
return fmt.Errorf("read tar: %w", err)
}
target := filepath.Join(destDir, hdr.Name)
switch hdr.Typeflag {
case tar.TypeDir:
os.MkdirAll(target, 0o755)
case tar.TypeReg:
os.MkdirAll(filepath.Dir(target), 0o755)
mode := os.FileMode(hdr.Mode)
if mode == 0 {
mode = 0o644
}
out, err := os.OpenFile(target, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, mode)
if err != nil {
return err
}
io.Copy(out, tr)
out.Close()
}
}
}
internal/embedded/log.go
+20
View File
@@ -0,0 +1,20 @@
package embedded
import "github.com/rs/zerolog/log"
// logWriter bridges subprocess stdout/stderr to zerolog.
type logWriter struct {
level string
component string
}
func (w *logWriter) Write(p []byte) (n int, err error) {
msg := string(p)
switch w.level {
case "error":
log.Error().Str("component", w.component).Msg(msg)
default:
log.Debug().Str("component", w.component).Msg(msg)
}
return len(p), nil
}
internal/embedded/perses.go
+133
View File
@@ -0,0 +1,133 @@
package embedded
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"github.com/fujin/anthropic-proxy/internal/config"
"github.com/rs/zerolog/log"
)
type Perses struct {
cfg config.EmbeddedConfig
proxyPort int
cmd *exec.Cmd
tmpDir string
}
func NewPerses(cfg config.EmbeddedConfig, proxyPort int) *Perses {
return &Perses{cfg: cfg, proxyPort: proxyPort}
}
func (p *Perses) Start() error {
bin, err := ensureBinary("perses", p.cfg.PersesBinary, p.cfg.BinDir)
if err != nil {
return fmt.Errorf("perses: %w", err)
}
p.tmpDir, err = os.MkdirTemp("", "perses-*")
if err != nil {
return fmt.Errorf("create temp dir: %w", err)
}
if err := p.writeServerConfig(); err != nil {
return fmt.Errorf("write server config: %w", err)
}
if err := p.writeDatasourceProvision(); err != nil {
return fmt.Errorf("write datasource provision: %w", err)
}
if err := p.writeDashboardProvision(); err != nil {
return fmt.Errorf("write dashboard provision: %w", err)
}
p.cmd = exec.Command(bin,
"--config", filepath.Join(p.tmpDir, "config.yaml"),
"-web.listen-address", fmt.Sprintf(":%d", p.cfg.Port),
)
p.cmd.Dir = filepath.Dir(bin)
p.cmd.Stdout = &logWriter{level: "info", component: "perses"}
p.cmd.Stderr = &logWriter{level: "error", component: "perses"}
if err := p.cmd.Start(); err != nil {
return fmt.Errorf("start perses: %w", err)
}
log.Info().
Str("binary", bin).
Int("port", p.cfg.Port).
Str("config", p.tmpDir).
Msg("perses started")
return nil
}
func (p *Perses) Stop() {
if p.cmd != nil && p.cmd.Process != nil {
_ = p.cmd.Process.Kill()
_ = p.cmd.Wait()
}
if p.tmpDir != "" {
_ = os.RemoveAll(p.tmpDir)
}
}
func (p *Perses) Running() bool {
return p.cmd != nil && p.cmd.Process != nil && p.cmd.ProcessState == nil
}
func (p *Perses) writeServerConfig() error {
provisionDir := filepath.Join(p.tmpDir, "provisions")
if err := os.MkdirAll(filepath.Join(provisionDir, "datasources"), 0o755); err != nil {
return err
}
if err := os.MkdirAll(filepath.Join(provisionDir, "dashboards"), 0o755); err != nil {
return err
}
cfg := fmt.Sprintf(`provisioning:
interval: 1m
folders:
- %s
database:
file:
folder: %s/data
extension: json
security:
readonly: false
enable_auth: false
`, provisionDir, p.tmpDir)
return os.WriteFile(filepath.Join(p.tmpDir, "config.yaml"), []byte(cfg), 0o644)
}
func (p *Perses) writeDatasourceProvision() error {
ds := fmt.Sprintf(`kind: Datasource
metadata:
name: victoria-metrics
project: anthropic-proxy
spec:
default: true
plugin:
kind: PrometheusDatasource
spec:
directUrl: http://localhost:%d
`, p.cfg.VMPort)
return os.WriteFile(
filepath.Join(p.tmpDir, "provisions", "datasources", "vm.yaml"),
[]byte(ds), 0o644,
)
}
func (p *Perses) writeDashboardProvision() error {
dashData, err := DashboardJSON()
if err != nil {
return err
}
return os.WriteFile(
filepath.Join(p.tmpDir, "provisions", "dashboards", "proxy.json"),
dashData, 0o644,
)
}
internal/embedded/vm.go
+88
View File
@@ -0,0 +1,88 @@
package embedded
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"github.com/fujin/anthropic-proxy/internal/config"
"github.com/rs/zerolog/log"
)
type VM struct {
cfg config.EmbeddedConfig
proxyPort int
cmd *exec.Cmd
tmpDir string
}
func NewVM(cfg config.EmbeddedConfig, proxyPort int) *VM {
return &VM{cfg: cfg, proxyPort: proxyPort}
}
func (v *VM) Start() error {
bin, err := ensureBinary("victoria-metrics", v.cfg.VMBinary, v.cfg.BinDir)
if err != nil {
return fmt.Errorf("victoria-metrics: %w", err)
}
v.tmpDir, err = os.MkdirTemp("", "vm-*")
if err != nil {
return fmt.Errorf("create temp dir: %w", err)
}
scrapeConfig := fmt.Sprintf(`global:
scrape_interval: 15s
scrape_configs:
- job_name: anthropic-proxy
static_configs:
- targets:
- localhost:%d
`, v.proxyPort)
scrapePath := filepath.Join(v.tmpDir, "scrape.yaml")
if err := os.WriteFile(scrapePath, []byte(scrapeConfig), 0o644); err != nil {
return fmt.Errorf("write scrape config: %w", err)
}
dataPath := filepath.Join(v.tmpDir, "data")
if err := os.MkdirAll(dataPath, 0o755); err != nil {
return fmt.Errorf("create data dir: %w", err)
}
v.cmd = exec.Command(bin,
"-storageDataPath", dataPath,
"-retentionPeriod", "7d",
"-httpListenAddr", fmt.Sprintf(":%d", v.cfg.VMPort),
"-promscrape.config", scrapePath,
)
v.cmd.Stdout = &logWriter{level: "info", component: "victoria-metrics"}
v.cmd.Stderr = &logWriter{level: "error", component: "victoria-metrics"}
if err := v.cmd.Start(); err != nil {
return fmt.Errorf("start victoria-metrics: %w", err)
}
log.Info().
Str("binary", bin).
Int("port", v.cfg.VMPort).
Int("scrape_target_port", v.proxyPort).
Msg("victoria-metrics started")
return nil
}
func (v *VM) Stop() {
if v.cmd != nil && v.cmd.Process != nil {
_ = v.cmd.Process.Kill()
_ = v.cmd.Wait()
}
if v.tmpDir != "" {
_ = os.RemoveAll(v.tmpDir)
}
}
func (v *VM) Running() bool {
return v.cmd != nil && v.cmd.Process != nil && v.cmd.ProcessState == nil
}
internal/logging/logging.go
+3 -11
View File
@@ -13,17 +13,9 @@ import (
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"gopkg.in/lumberjack.v2"
)
// Config holds logging configuration, mirrors config.LoggingConfig.
type Config struct {
Level string
File string
MaxSizeMB int
MaxBackups int
MaxAgeDays int
Compress bool
}
"github.com/fujin/anthropic-proxy/internal/config"
)
// Setup initializes the global zerolog logger.
// - File set: JSON → lumberjack rotating file
@@ -31,7 +23,7 @@ type Config struct {
// - File empty + not TTY: JSON → stderr (for systemd journal)
// Extra writers (e.g., OTLP log bridge) are added via io.MultiWriter so logs
// are written to both the primary destination and any extra writers.
func Setup(cfg Config, extraWriters ...io.Writer) zerolog.Logger {
func Setup(cfg config.LoggingConfig, extraWriters ...io.Writer) zerolog.Logger {
// Parse log level
level, err := zerolog.ParseLevel(cfg.Level)
if err != nil || cfg.Level == "" {
internal/logging/logging_test.go
+232
View File
@@ -0,0 +1,232 @@
package logging
import (
"context"
"encoding/json"
"net/http"
"path/filepath"
"strings"
"testing"
"github.com/rs/zerolog"
"github.com/fujin/anthropic-proxy/internal/config"
)
func TestRedactHeaders(t *testing.T) {
tests := []struct {
name string
headers http.Header
check func(t *testing.T, result string)
}{
{
name: "redacts Authorization",
headers: http.Header{
"Authorization": []string{"Bearer secret-token"},
},
check: func(t *testing.T, result string) {
var m map[string]string
if err := json.Unmarshal([]byte(result), &m); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if m["Authorization"] != "***" {
t.Errorf("Authorization = %q, want ***", m["Authorization"])
}
},
},
{
name: "redacts x-api-key",
headers: http.Header{
"X-Api-Key": []string{"sk-ant-secret"},
},
check: func(t *testing.T, result string) {
var m map[string]string
if err := json.Unmarshal([]byte(result), &m); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if m["X-Api-Key"] != "***" {
t.Errorf("X-Api-Key = %q, want ***", m["X-Api-Key"])
}
},
},
{
name: "preserves other headers",
headers: http.Header{
"Content-Type": []string{"application/json"},
"Accept": []string{"text/html", "application/json"},
},
check: func(t *testing.T, result string) {
var m map[string]string
if err := json.Unmarshal([]byte(result), &m); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if m["Content-Type"] != "application/json" {
t.Errorf("Content-Type = %q, want application/json", m["Content-Type"])
}
if m["Accept"] != "text/html, application/json" {
t.Errorf("Accept = %q, want 'text/html, application/json'", m["Accept"])
}
},
},
{
name: "case-insensitive redaction",
headers: http.Header{
"authorization": []string{"Bearer token"},
"X-API-KEY": []string{"key123"},
},
check: func(t *testing.T, result string) {
var m map[string]string
if err := json.Unmarshal([]byte(result), &m); err != nil {
t.Fatalf("unmarshal: %v", err)
}
// http.Header canonicalizes keys, but RedactHeaders lowercases for comparison
for _, v := range m {
if v != "***" {
t.Errorf("expected all values to be ***, got %q", v)
}
}
},
},
{
name: "empty headers",
headers: http.Header{},
check: func(t *testing.T, result string) {
if result != "{}" {
t.Errorf("result = %q, want {}", result)
}
},
},
{
name: "mixed sensitive and non-sensitive",
headers: http.Header{
"Authorization": []string{"Bearer tok"},
"X-Api-Key": []string{"key"},
"Content-Type": []string{"application/json"},
"X-Request-Id": []string{"abc123"},
},
check: func(t *testing.T, result string) {
var m map[string]string
if err := json.Unmarshal([]byte(result), &m); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if m["Authorization"] != "***" {
t.Errorf("Authorization = %q, want ***", m["Authorization"])
}
if m["X-Api-Key"] != "***" {
t.Errorf("X-Api-Key = %q, want ***", m["X-Api-Key"])
}
if m["Content-Type"] != "application/json" {
t.Errorf("Content-Type = %q", m["Content-Type"])
}
if m["X-Request-Id"] != "abc123" {
t.Errorf("X-Request-Id = %q", m["X-Request-Id"])
}
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := RedactHeaders(tt.headers)
// Result should be valid JSON
if !json.Valid([]byte(result)) {
t.Fatalf("result is not valid JSON: %q", result)
}
tt.check(t, result)
})
}
}
func TestRedactHeaders_ReturnsJSON(t *testing.T) {
h := http.Header{"Foo": []string{"bar"}}
result := RedactHeaders(h)
if !strings.HasPrefix(result, "{") || !strings.HasSuffix(result, "}") {
t.Errorf("result not JSON object: %q", result)
}
}
func TestStatusLevel(t *testing.T) {
tests := []struct {
status int
want zerolog.Level
}{
{200, zerolog.InfoLevel},
{201, zerolog.InfoLevel},
{204, zerolog.InfoLevel},
{301, zerolog.InfoLevel},
{399, zerolog.InfoLevel},
{400, zerolog.WarnLevel},
{401, zerolog.WarnLevel},
{403, zerolog.WarnLevel},
{404, zerolog.WarnLevel},
{429, zerolog.WarnLevel},
{499, zerolog.WarnLevel},
{500, zerolog.ErrorLevel},
{502, zerolog.ErrorLevel},
{503, zerolog.ErrorLevel},
{599, zerolog.ErrorLevel},
}
for _, tt := range tests {
got := statusLevel(tt.status)
if got != tt.want {
t.Errorf("statusLevel(%d) = %v, want %v", tt.status, got, tt.want)
}
}
}
func TestSetup_WithFile(t *testing.T) {
dir := t.TempDir()
logFile := filepath.Join(dir, "test.log")
logger := Setup(config.LoggingConfig{
Level: "debug",
File: logFile,
MaxSizeMB: 10,
MaxBackups: 1,
MaxAgeDays: 1,
})
// Verify logger works (no panic)
logger.Info().Msg("test message")
}
func TestSetup_WithoutFile(t *testing.T) {
// File empty — should use console or stderr mode depending on TTY
logger := Setup(config.LoggingConfig{
Level: "warn",
})
// Verify logger works (no panic)
logger.Warn().Msg("test warning")
}
func TestSetup_DefaultLevel(t *testing.T) {
// Empty level should default to info
logger := Setup(config.LoggingConfig{})
_ = logger // verify no panic
}
func TestSetup_InvalidLevel(t *testing.T) {
// Invalid level should default to info
logger := Setup(config.LoggingConfig{Level: "not-a-level"})
_ = logger // verify no panic
}
func TestFromContext_NoLogger(t *testing.T) {
// Background context has no zerolog logger — should return global
ctx := context.Background()
l := FromContext(ctx)
if l == nil {
t.Fatal("FromContext returned nil")
}
}
func TestFromContext_WithLogger(t *testing.T) {
logger := zerolog.Nop()
ctx := logger.WithContext(context.Background())
l := FromContext(ctx)
if l == nil {
t.Fatal("FromContext returned nil")
}
}
internal/proxy/billing.go
+4
View File
@@ -11,9 +11,13 @@ import (
"github.com/tidwall/sjson"
)
// fingerprintSalt is the fixed salt used by Claude Code for billing header
// fingerprint computation. Extracted from the Claude Code CLI source.
const fingerprintSalt = "59cf53e54c78"
func computeFingerprint(firstUserMessage string, version string) string {
// UTF-16 character indices sampled from the first user message, matching
// the Claude Code CLI's fingerprinting algorithm.
indices := []int{4, 7, 20}
runes := utf16.Encode([]rune(firstUserMessage))
var chars string
internal/proxy/billing_test.go
+323
View File
@@ -0,0 +1,323 @@
package proxy
import (
"encoding/hex"
"strings"
"testing"
)
func TestFingerprintSaltConstant(t *testing.T) {
if fingerprintSalt != "59cf53e54c78" {
t.Errorf("fingerprintSalt = %q, want %q", fingerprintSalt, "59cf53e54c78")
}
}
func TestComputeFingerprint_Deterministic(t *testing.T) {
a := computeFingerprint("hello world test message", "1.0.0")
b := computeFingerprint("hello world test message", "1.0.0")
if a != b {
t.Errorf("fingerprint not deterministic: %q != %q", a, b)
}
}
func TestComputeFingerprint_Length(t *testing.T) {
fp := computeFingerprint("some message here", "2.0.0")
if len(fp) != 3 {
t.Errorf("fingerprint length = %d, want 3", len(fp))
}
// Must be valid hex
if _, err := hex.DecodeString(fp + "0"); err != nil { // pad to even length for decode
// Check each char is hex individually
for _, c := range fp {
if !((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f')) {
t.Errorf("fingerprint %q contains non-hex char %c", fp, c)
}
}
}
}
func TestComputeFingerprint_DifferentVersions(t *testing.T) {
a := computeFingerprint("same message", "1.0.0")
b := computeFingerprint("same message", "2.0.0")
if a == b {
t.Errorf("different versions should (almost certainly) produce different fingerprints")
}
}
func TestComputeFingerprint_ShortMessage(t *testing.T) {
// "hi" has only 2 chars, indices [4,7,20] all out of range → chars = "000"
fp := computeFingerprint("hi", "1.0.0")
if len(fp) != 3 {
t.Errorf("short message fingerprint length = %d, want 3", len(fp))
}
}
func TestComputeFingerprint_EmptyMessage(t *testing.T) {
// Empty → all indices out of range → chars = "000"
fp := computeFingerprint("", "1.0.0")
if len(fp) != 3 {
t.Errorf("empty message fingerprint length = %d, want 3", len(fp))
}
// Empty and short message with same version should produce same fingerprint
// since both result in chars = "000"
fpShort := computeFingerprint("hi", "1.0.0")
if fp != fpShort {
t.Errorf("empty and 'hi' should produce same fingerprint (both use '000'), got %q vs %q", fp, fpShort)
}
}
func TestComputeFingerprint_Unicode(t *testing.T) {
// Emoji: 🎉 is U+1F389, encoded as UTF-16 surrogate pair [0xD83C, 0xDF89]
// So "abcd🎉fg" in UTF-16 is [a, b, c, d, 0xD83C, 0xDF89, f, g] = 8 uint16 values
// indices [4,7,20]: runes[4]=0xD83C, runes[7]='g', runes[20]=out of range
fp := computeFingerprint("abcd🎉fg", "1.0.0")
if len(fp) != 3 {
t.Errorf("unicode fingerprint length = %d, want 3", len(fp))
}
}
func TestComputeFingerprint_CharExtraction(t *testing.T) {
// "Hello, World!" UTF-16: [H,e,l,l,o,',', ,W,o,r,l,d,!]
// indices [4,7,20]: runes[4]='o', runes[7]='W', runes[20]=out of range → "0"
// So chars should be "oW0"
// Verify by comparing to a message where we know the expected extracted chars
// Two messages that extract same chars at indices should produce same fingerprint
// "xxxxoxxWxxxxxxxxxxxx" → index 4='o', 7='W', 20=out of range → "oW0" (20 chars, index 20 out of range)
fp1 := computeFingerprint("Hello, World!", "1.0.0")
fp2 := computeFingerprint("xxxxoxxWxxxxxxxxxxxx", "1.0.0")
if fp1 != fp2 {
t.Errorf("messages with same chars at indices [4,7,20] should produce same fingerprint, got %q vs %q", fp1, fp2)
}
}
func TestComputeFingerprint_IndexBoundary(t *testing.T) {
// Message with exactly 21 chars → index 20 is valid
msg21 := "abcdefghijklmnopqrstu" // 21 chars
fp21 := computeFingerprint(msg21, "1.0.0")
// Message with exactly 20 chars → index 20 is out of range → "0"
msg20 := "abcdefghijklmnopqrst" // 20 chars
fp20 := computeFingerprint(msg20, "1.0.0")
// They should differ because index 20 produces different chars
if fp21 == fp20 {
t.Errorf("boundary test: 21-char and 20-char messages should differ at index 20")
}
}
func TestExtractFirstUserMessage(t *testing.T) {
tests := []struct {
name string
body string
expected string
}{
{
name: "simple string content",
body: `{"messages":[{"role":"user","content":"hello world"}]}`,
expected: "hello world",
},
{
name: "array content with text block",
body: `{"messages":[{"role":"user","content":[{"type":"text","text":"from array"}]}]}`,
expected: "from array",
},
{
name: "no user messages",
body: `{"messages":[{"role":"assistant","content":"I am assistant"}]}`,
expected: "",
},
{
name: "assistant only messages",
body: `{"messages":[{"role":"assistant","content":"a1"},{"role":"assistant","content":"a2"}]}`,
expected: "",
},
{
name: "user with non-text block first then text",
body: `{"messages":[{"role":"user","content":[{"type":"image","source":"x"},{"type":"text","text":"the text"}]}]}`,
expected: "the text",
},
{
name: "user with only non-text blocks",
body: `{"messages":[{"role":"user","content":[{"type":"image","source":"x"}]}]}`,
expected: "",
},
{
name: "no messages field",
body: `{"model":"claude-sonnet-4-6"}`,
expected: "",
},
{
name: "messages not array",
body: `{"messages":"not array"}`,
expected: "",
},
{
name: "empty messages array",
body: `{"messages":[]}`,
expected: "",
},
{
name: "first user message used even if multiple exist",
body: `{"messages":[{"role":"user","content":"first"},{"role":"user","content":"second"}]}`,
expected: "first",
},
{
name: "assistant before user",
body: `{"messages":[{"role":"assistant","content":"assistant msg"},{"role":"user","content":"user msg"}]}`,
expected: "user msg",
},
{
name: "user with array content - first text block used",
body: `{"messages":[{"role":"user","content":[{"type":"text","text":"first text"},{"type":"text","text":"second text"}]}]}`,
expected: "first text",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := extractFirstUserMessage([]byte(tt.body))
if result != tt.expected {
t.Errorf("got %q, want %q", result, tt.expected)
}
})
}
}
func TestExtractFirstUserMessage_BreaksAfterFirstUser(t *testing.T) {
// The function should break after finding the first user message,
// even if it didn't extract text (e.g. user with only image blocks)
body := `{"messages":[{"role":"user","content":[{"type":"image","source":"x"}]},{"role":"user","content":"second user"}]}`
result := extractFirstUserMessage([]byte(body))
// First user has no text blocks, function breaks, returns ""
if result != "" {
t.Errorf("should return empty when first user has no text, got %q", result)
}
}
func TestBuildBillingHeader(t *testing.T) {
body := []byte(`{"messages":[{"role":"user","content":"test message"}]}`)
version := "1.2.3"
header := buildBillingHeader(body, version)
// Check format
if !strings.HasPrefix(header, "x-anthropic-billing-header: cc_version=1.2.3.") {
t.Errorf("header should start with 'x-anthropic-billing-header: cc_version=1.2.3.', got %q", header)
}
if !strings.Contains(header, "; cc_entrypoint=cli; cch=00000;") {
t.Errorf("header should contain '; cc_entrypoint=cli; cch=00000;', got %q", header)
}
// Verify the fingerprint part is 3 chars
// Format: "x-anthropic-billing-header: cc_version=1.2.3.XXX; cc_entrypoint=cli; cch=00000;"
parts := strings.Split(header, "cc_version=")
if len(parts) != 2 {
t.Fatalf("unexpected header format: %q", header)
}
versionFP := strings.Split(parts[1], ";")[0]
if !strings.HasPrefix(versionFP, "1.2.3.") {
t.Errorf("version+fingerprint should start with '1.2.3.', got %q", versionFP)
}
fp := strings.TrimPrefix(versionFP, "1.2.3.")
if len(fp) != 3 {
t.Errorf("fingerprint should be 3 chars, got %q (len %d)", fp, len(fp))
}
}
func TestBuildBillingHeader_EmptyMessages(t *testing.T) {
body := []byte(`{"messages":[]}`)
version := "1.0.0"
header := buildBillingHeader(body, version)
if !strings.HasPrefix(header, "x-anthropic-billing-header: cc_version=") {
t.Errorf("header format wrong: %q", header)
}
}
func TestInjectBillingHeader_NoExistingSystem(t *testing.T) {
body := []byte(`{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`)
result := injectBillingHeader(body, "1.0.0")
resultStr := string(result)
// Should have system field now
if !strings.Contains(resultStr, `"system"`) {
t.Errorf("should inject system field, got %s", resultStr)
}
// System should be an array with one billing block
if !strings.Contains(resultStr, "x-anthropic-billing-header") {
t.Errorf("should contain billing header text, got %s", resultStr)
}
if !strings.Contains(resultStr, `"type":"text"`) {
t.Errorf("billing block should have type text, got %s", resultStr)
}
}
func TestInjectBillingHeader_ExistingSystemArray(t *testing.T) {
body := []byte(`{"system":[{"type":"text","text":"existing prompt"}],"messages":[{"role":"user","content":"hi"}]}`)
result := injectBillingHeader(body, "1.0.0")
resultStr := string(result)
// Should contain both billing header and existing prompt
if !strings.Contains(resultStr, "x-anthropic-billing-header") {
t.Errorf("should contain billing header, got %s", resultStr)
}
if !strings.Contains(resultStr, "existing prompt") {
t.Errorf("should preserve existing prompt, got %s", resultStr)
}
// Billing block should be FIRST (prepended)
billingIdx := strings.Index(resultStr, "x-anthropic-billing-header")
existingIdx := strings.Index(resultStr, "existing prompt")
if billingIdx > existingIdx {
t.Errorf("billing block should come before existing prompt")
}
}
func TestInjectBillingHeader_ExistingSystemString(t *testing.T) {
body := []byte(`{"system":"You are a helpful assistant","messages":[{"role":"user","content":"hi"}]}`)
result := injectBillingHeader(body, "1.0.0")
resultStr := string(result)
// Should convert to array with billing block first, then original text
if !strings.Contains(resultStr, "x-anthropic-billing-header") {
t.Errorf("should contain billing header, got %s", resultStr)
}
if !strings.Contains(resultStr, "You are a helpful assistant") {
t.Errorf("should preserve original system string, got %s", resultStr)
}
// Billing should come first
billingIdx := strings.Index(resultStr, "x-anthropic-billing-header")
origIdx := strings.Index(resultStr, "You are a helpful assistant")
if billingIdx > origIdx {
t.Errorf("billing block should come before original system text")
}
}
func TestInjectBillingHeader_PreservesOtherFields(t *testing.T) {
body := []byte(`{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}],"max_tokens":1024}`)
result := injectBillingHeader(body, "1.0.0")
resultStr := string(result)
if !strings.Contains(resultStr, `"model":"claude-sonnet-4-6"`) {
t.Errorf("should preserve model field, got %s", resultStr)
}
if !strings.Contains(resultStr, `"max_tokens":1024`) {
t.Errorf("should preserve max_tokens field, got %s", resultStr)
}
}
func TestInjectBillingHeader_BillingBlockFormat(t *testing.T) {
body := []byte(`{"messages":[{"role":"user","content":"test"}]}`)
result := injectBillingHeader(body, "2.5.0")
resultStr := string(result)
// Verify the billing block contains the correct version
if !strings.Contains(resultStr, "cc_version=2.5.0.") {
t.Errorf("billing block should contain cc_version=2.5.0., got %s", resultStr)
}
if !strings.Contains(resultStr, "cc_entrypoint=cli") {
t.Errorf("billing block should contain cc_entrypoint=cli, got %s", resultStr)
}
if !strings.Contains(resultStr, "cch=00000") {
t.Errorf("billing block should contain cch=00000, got %s", resultStr)
}
}
internal/proxy/handler.go
+92 -134
View File
@@ -2,6 +2,7 @@ package proxy
import (
"bufio"
"context"
"io"
"net/http"
"time"
@@ -18,6 +19,15 @@ import (
"github.com/fujin/anthropic-proxy/internal/telemetry"
)
// requestInfo bundles common request context passed to logging/telemetry helpers.
type requestInfo struct {
model string
stream bool
cred *auth.Credential
body []byte
originalBody []byte
}
func HandleMessages(pool *auth.Pool, profile *SniffedProfile, getSanitizer func() *Sanitizer, tracker *ratelimit.Tracker) gin.HandlerFunc {
upstream := NewUpstreamClient(profile)
@@ -61,6 +71,7 @@ func handleNonStream(c *gin.Context, upstream *UpstreamClient, san *Sanitizer, p
startTime := time.Now()
model := gjson.GetBytes(body, "model").String()
ctx := c.Request.Context()
ri := requestInfo{model: model, stream: false, cred: cred, body: body, originalBody: originalBody}
telemetry.RequestBodySize.Record(ctx, int64(len(body)),
metric.WithAttributes(attribute.String("model", model), attribute.Bool("stream", false)))
@@ -69,85 +80,25 @@ func handleNonStream(c *gin.Context, upstream *UpstreamClient, san *Sanitizer, p
latencyMs := float64(time.Since(startTime).Milliseconds())
if err != nil {
log.Error().
Err(err).
Str("credential", cred.Email).
Str("model", model).
Bool("stream", false).
Str("request_body_original", string(originalBody)).
Str("request_body_sanitized", string(body)).
Int("request_body_size", len(body)).
Float64("latency_ms", latencyMs).
Msg("upstream connection error")
telemetry.UpstreamErrors.Add(ctx, 1,
metric.WithAttributes(
attribute.String("error_type", "connection"),
attribute.String("credential", cred.Email),
attribute.Int("status_code", http.StatusBadGateway),
))
telemetry.RequestCounter.Add(ctx, 1,
metric.WithAttributes(
attribute.String("model", model),
attribute.Bool("stream", false),
attribute.Int("status_code", http.StatusBadGateway),
))
telemetry.RequestDuration.Record(ctx, latencyMs,
metric.WithAttributes(attribute.String("model", model), attribute.Bool("stream", false), attribute.Int("status_code", http.StatusBadGateway)))
recordConnectionError(ctx, err, ri, latencyMs)
c.JSON(http.StatusBadGateway, gin.H{"error": "upstream request failed"})
return
}
attrs := []attribute.KeyValue{
attribute.String("model", model),
attribute.Bool("stream", false),
attribute.Int("status_code", statusCode),
}
telemetry.RequestCounter.Add(ctx, 1, metric.WithAttributes(attrs...))
telemetry.RequestDuration.Record(ctx, latencyMs, metric.WithAttributes(attrs...))
recordRequestMetrics(ctx, ri, statusCode, latencyMs)
if statusCode >= 400 {
pool.MarkFailure(cred, statusCode)
telemetry.CredentialCooldowns.Add(ctx, 1,
metric.WithAttributes(attribute.Int("status_code", statusCode)))
errorType := gjson.GetBytes(respBody, "error.type").String()
errorMessage := gjson.GetBytes(respBody, "error.message").String()
log.Error().
Int("status", statusCode).
Str("error_type", errorType).
Str("error_message", errorMessage).
Str("response_body", string(respBody)).
Str("request_id", headers.Get("X-Request-Id")).
Float64("latency_ms", latencyMs).
Str("credential", cred.Email).
Str("model", model).
Bool("stream", false).
Str("request_body_original", string(originalBody)).
Str("request_body_sanitized", string(body)).
Int("request_body_size", len(body)).
Str("request_headers", logging.RedactHeaders(c.Request.Header)).
Msg("upstream error")
telemetry.UpstreamErrors.Add(ctx, 1,
metric.WithAttributes(
attribute.Int("status_code", statusCode),
attribute.String("error_type", errorType),
attribute.String("credential", cred.Email),
))
recordUpstreamError(ctx, statusCode, respBody, headers.Get("X-Request-Id"), latencyMs, ri, c.Request.Header)
} else {
pool.MarkSuccess(cred)
respBody = san.DesanitizeResponse(respBody)
inputTokens := gjson.GetBytes(respBody, "usage.input_tokens").Int()
outputTokens := gjson.GetBytes(respBody, "usage.output_tokens").Int()
tokenAttrs := metric.WithAttributes(
attribute.String("model", model),
attribute.String("credential", cred.Email),
)
telemetry.TokensInput.Add(ctx, inputTokens, tokenAttrs)
telemetry.TokensOutput.Add(ctx, outputTokens, tokenAttrs)
recordTokenUsage(ctx, model, cred, inputTokens, outputTokens)
if tracker != nil {
tracker.UpdateFromHeaders(headers)
}
@@ -174,6 +125,7 @@ func handleStream(c *gin.Context, upstream *UpstreamClient, san *Sanitizer, pool
startTime := time.Now()
model := gjson.GetBytes(body, "model").String()
ctx := c.Request.Context()
ri := requestInfo{model: model, stream: true, cred: cred, body: body, originalBody: originalBody}
telemetry.StreamRequests.Add(ctx, 1, metric.WithAttributes(attribute.String("model", model)))
telemetry.RequestBodySize.Record(ctx, int64(len(body)),
@@ -182,32 +134,7 @@ func handleStream(c *gin.Context, upstream *UpstreamClient, san *Sanitizer, pool
resp, err := upstream.ExecuteStream(ctx, cred, body)
if err != nil {
latencyMs := float64(time.Since(startTime).Milliseconds())
log.Error().
Err(err).
Str("credential", cred.Email).
Str("model", model).
Bool("stream", true).
Str("request_body_original", string(originalBody)).
Str("request_body_sanitized", string(body)).
Int("request_body_size", len(body)).
Float64("latency_ms", latencyMs).
Msg("upstream connection error")
telemetry.UpstreamErrors.Add(ctx, 1,
metric.WithAttributes(
attribute.String("error_type", "connection"),
attribute.String("credential", cred.Email),
attribute.Int("status_code", http.StatusBadGateway),
))
telemetry.RequestCounter.Add(ctx, 1,
metric.WithAttributes(
attribute.String("model", model),
attribute.Bool("stream", true),
attribute.Int("status_code", http.StatusBadGateway),
))
telemetry.RequestDuration.Record(ctx, latencyMs,
metric.WithAttributes(attribute.String("model", model), attribute.Bool("stream", true), attribute.Int("status_code", http.StatusBadGateway)))
recordConnectionError(ctx, err, ri, latencyMs)
c.JSON(http.StatusBadGateway, gin.H{"error": "upstream stream request failed"})
return
}
@@ -219,37 +146,8 @@ func handleStream(c *gin.Context, upstream *UpstreamClient, san *Sanitizer, pool
metric.WithAttributes(attribute.Int("status_code", resp.StatusCode)))
respBody, _ := io.ReadAll(resp.Body)
latencyMs := float64(time.Since(startTime).Milliseconds())
errorType := gjson.GetBytes(respBody, "error.type").String()
errorMessage := gjson.GetBytes(respBody, "error.message").String()
log.Error().
Int("status", resp.StatusCode).
Str("error_type", errorType).
Str("error_message", errorMessage).
Str("response_body", string(respBody)).
Str("request_id", resp.Header.Get("X-Request-Id")).
Float64("latency_ms", latencyMs).
Str("credential", cred.Email).
Str("model", model).
Bool("stream", true).
Str("request_body_original", string(originalBody)).
Str("request_body_sanitized", string(body)).
Int("request_body_size", len(body)).
Str("request_headers", logging.RedactHeaders(c.Request.Header)).
Msg("upstream error")
attrs := []attribute.KeyValue{
attribute.String("model", model),
attribute.Bool("stream", true),
attribute.Int("status_code", resp.StatusCode),
}
telemetry.RequestCounter.Add(ctx, 1, metric.WithAttributes(attrs...))
telemetry.RequestDuration.Record(ctx, latencyMs, metric.WithAttributes(attrs...))
telemetry.UpstreamErrors.Add(ctx, 1,
metric.WithAttributes(
attribute.Int("status_code", resp.StatusCode),
attribute.String("error_type", errorType),
attribute.String("credential", cred.Email),
))
recordRequestMetrics(ctx, ri, resp.StatusCode, latencyMs)
recordUpstreamError(ctx, resp.StatusCode, respBody, resp.Header.Get("X-Request-Id"), latencyMs, ri, c.Request.Header)
c.Data(resp.StatusCode, resp.Header.Get("Content-Type"), respBody)
return
@@ -290,21 +188,10 @@ func handleStream(c *gin.Context, upstream *UpstreamClient, san *Sanitizer, pool
}
latencyMs := float64(time.Since(startTime).Milliseconds())
attrs := []attribute.KeyValue{
attribute.String("model", model),
attribute.Bool("stream", true),
attribute.Int("status_code", http.StatusOK),
}
telemetry.RequestCounter.Add(ctx, 1, metric.WithAttributes(attrs...))
telemetry.RequestDuration.Record(ctx, latencyMs, metric.WithAttributes(attrs...))
recordRequestMetrics(ctx, ri, http.StatusOK, latencyMs)
if inputTokens > 0 || outputTokens > 0 {
tokenAttrs := metric.WithAttributes(
attribute.String("model", model),
attribute.String("credential", cred.Email),
)
telemetry.TokensInput.Add(ctx, inputTokens, tokenAttrs)
telemetry.TokensOutput.Add(ctx, outputTokens, tokenAttrs)
recordTokenUsage(ctx, model, cred, inputTokens, outputTokens)
if tracker != nil {
tracker.UpdateFromHeaders(resp.Header)
}
@@ -322,3 +209,74 @@ func handleStream(c *gin.Context, upstream *UpstreamClient, san *Sanitizer, pool
log.Error().Err(err).Msg("stream scan error")
}
}
// recordConnectionError logs and records metrics for upstream connection failures.
func recordConnectionError(ctx context.Context, err error, ri requestInfo, latencyMs float64) {
log.Error().
Err(err).
Str("credential", ri.cred.Email).
Str("model", ri.model).
Bool("stream", ri.stream).
Str("request_body_original", string(ri.originalBody)).
Str("request_body_sanitized", string(ri.body)).
Int("request_body_size", len(ri.body)).
Float64("latency_ms", latencyMs).
Msg("upstream connection error")
telemetry.UpstreamErrors.Add(ctx, 1,
metric.WithAttributes(
attribute.String("error_type", "connection"),
attribute.String("credential", ri.cred.Email),
attribute.Int("status_code", http.StatusBadGateway),
))
recordRequestMetrics(ctx, ri, http.StatusBadGateway, latencyMs)
}
// recordUpstreamError logs and records metrics for upstream HTTP error responses.
func recordUpstreamError(ctx context.Context, statusCode int, respBody []byte, requestID string, latencyMs float64, ri requestInfo, requestHeaders http.Header) {
errorType := gjson.GetBytes(respBody, "error.type").String()
errorMessage := gjson.GetBytes(respBody, "error.message").String()
log.Error().
Int("status", statusCode).
Str("error_type", errorType).
Str("error_message", errorMessage).
Str("response_body", string(respBody)).
Str("request_id", requestID).
Float64("latency_ms", latencyMs).
Str("credential", ri.cred.Email).
Str("model", ri.model).
Bool("stream", ri.stream).
Str("request_body_original", string(ri.originalBody)).
Str("request_body_sanitized", string(ri.body)).
Int("request_body_size", len(ri.body)).
Str("request_headers", logging.RedactHeaders(requestHeaders)).
Msg("upstream error")
telemetry.UpstreamErrors.Add(ctx, 1,
metric.WithAttributes(
attribute.Int("status_code", statusCode),
attribute.String("error_type", errorType),
attribute.String("credential", ri.cred.Email),
))
}
// recordRequestMetrics records the request counter and duration histogram.
func recordRequestMetrics(ctx context.Context, ri requestInfo, statusCode int, latencyMs float64) {
attrs := []attribute.KeyValue{
attribute.String("model", ri.model),
attribute.Bool("stream", ri.stream),
attribute.Int("status_code", statusCode),
}
telemetry.RequestCounter.Add(ctx, 1, metric.WithAttributes(attrs...))
telemetry.RequestDuration.Record(ctx, latencyMs, metric.WithAttributes(attrs...))
}
// recordTokenUsage records token consumption metrics.
func recordTokenUsage(ctx context.Context, model string, cred *auth.Credential, inputTokens, outputTokens int64) {
tokenAttrs := metric.WithAttributes(
attribute.String("model", model),
attribute.String("credential", cred.Email),
)
telemetry.TokensInput.Add(ctx, inputTokens, tokenAttrs)
telemetry.TokensOutput.Add(ctx, outputTokens, tokenAttrs)
}
internal/proxy/handler_test.go
+624
View File
@@ -0,0 +1,624 @@
package proxy
import (
"bytes"
"fmt"
"io"
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/gin-gonic/gin"
"github.com/tidwall/gjson"
"github.com/fujin/anthropic-proxy/internal/auth"
"github.com/fujin/anthropic-proxy/internal/config"
"github.com/fujin/anthropic-proxy/internal/ratelimit"
"github.com/fujin/anthropic-proxy/internal/telemetry"
"go.opentelemetry.io/otel/metric/noop"
)
func init() {
gin.SetMode(gin.TestMode)
// Initialize telemetry with noop meter to avoid nil pointer panics.
meter := noop.Meter{}
telemetry.InitMetrics(meter, nil)
}
// --- Request body reading and sanitization ---
func TestHandleMessages_ReadBodyError(t *testing.T) {
// A body that immediately fails on read shouldn't panic.
pool := auth.NewPool([]*auth.Credential{{ID: "c1", AccessToken: "tok", Email: "test@test.com"}})
san := NewSanitizer(config.SanitizeConfig{})
handler := HandleMessages(pool, nil, func() *Sanitizer { return san }, nil)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", &errReader{})
handler(c)
if w.Code != http.StatusBadRequest {
t.Errorf("status = %d, want %d", w.Code, http.StatusBadRequest)
}
if !strings.Contains(w.Body.String(), "failed to read request body") {
t.Errorf("body = %q, expected error message about reading body", w.Body.String())
}
}
func TestHandleMessages_SanitizesRequestBody(t *testing.T) {
// We can't directly make HandleMessages use our mock server because
// UpstreamClient hardcodes messagesURL. Instead, we test sanitization
// by verifying the sanitizer is called on the body before any pool interaction.
san := NewSanitizer(config.SanitizeConfig{
Tools: []config.RenameRule{{From: "my_tool", To: "renamed_tool"}},
Body: []config.ReplaceRule{{Match: "secret", Replace: "redacted"}},
})
// Create body with tool name and secret
body := `{"model":"claude-sonnet-4-6","tools":[{"name":"my_tool"}],"messages":[{"role":"user","content":"secret data"}]}`
sanitizedBody := san.SanitizeRequest([]byte(body))
// Verify sanitization happened correctly
if !strings.Contains(string(sanitizedBody), "renamed_tool") {
t.Error("expected tool to be renamed in sanitized body")
}
if strings.Contains(string(sanitizedBody), "my_tool") {
t.Error("original tool name should be gone after sanitization")
}
if !strings.Contains(string(sanitizedBody), "redacted") {
t.Error("expected 'secret' to be replaced with 'redacted'")
}
if strings.Contains(string(sanitizedBody), "secret") {
t.Error("'secret' should be gone after sanitization")
}
}
func TestHandleMessages_PoolPickError(t *testing.T) {
// Empty pool — Pick() will fail.
pool := auth.NewPool(nil)
san := NewSanitizer(config.SanitizeConfig{})
handler := HandleMessages(pool, nil, func() *Sanitizer { return san }, nil)
body := `{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", strings.NewReader(body))
handler(c)
if w.Code != http.StatusServiceUnavailable {
t.Errorf("status = %d, want %d", w.Code, http.StatusServiceUnavailable)
}
if !strings.Contains(w.Body.String(), "no credentials available") {
t.Errorf("body = %q, expected pool error", w.Body.String())
}
}
func TestHandleMessages_PoolAllOnCooldown(t *testing.T) {
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "e"}
pool := auth.NewPool([]*auth.Credential{cred})
pool.MarkFailure(cred, 429) // puts on 30s cooldown
san := NewSanitizer(config.SanitizeConfig{})
handler := HandleMessages(pool, nil, func() *Sanitizer { return san }, nil)
body := `{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", strings.NewReader(body))
handler(c)
if w.Code != http.StatusServiceUnavailable {
t.Errorf("status = %d, want %d", w.Code, http.StatusServiceUnavailable)
}
if !strings.Contains(w.Body.String(), "cooldown") {
t.Errorf("body = %q, expected cooldown message", w.Body.String())
}
}
// --- Stream vs non-stream routing ---
func TestHandleMessages_StreamField_Detection(t *testing.T) {
tests := []struct {
name string
body string
isStream bool
}{
{
name: "stream true",
body: `{"model":"claude-sonnet-4-6","stream":true,"messages":[{"role":"user","content":"hi"}]}`,
isStream: true,
},
{
name: "stream false",
body: `{"model":"claude-sonnet-4-6","stream":false,"messages":[{"role":"user","content":"hi"}]}`,
isStream: false,
},
{
name: "no stream field defaults to false",
body: `{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`,
isStream: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := gjson.Get(tt.body, "stream").Bool()
if got != tt.isStream {
t.Errorf("stream = %v, want %v", got, tt.isStream)
}
})
}
}
// --- Desanitization on response ---
func TestDesanitization_NonStreamResponse(t *testing.T) {
san := NewSanitizer(config.SanitizeConfig{
Tools: []config.RenameRule{{From: "original_tool", To: "renamed_tool"}},
})
// Simulate upstream response with renamed tool
upstreamResponse := `{"content":[{"type":"tool_use","name":"renamed_tool","id":"t1","input":{}}]}`
desanitized := san.DesanitizeResponse([]byte(upstreamResponse))
if !strings.Contains(string(desanitized), "original_tool") {
t.Errorf("expected tool name to be desanitized back to 'original_tool', got %s", string(desanitized))
}
if strings.Contains(string(desanitized), `"name":"renamed_tool"`) {
t.Error("renamed_tool should have been replaced by original_tool")
}
}
func TestDesanitization_StreamEvent(t *testing.T) {
san := NewSanitizer(config.SanitizeConfig{
Tools: []config.RenameRule{{From: "original_tool", To: "renamed_tool"}},
})
event := `data: {"type":"content_block_start","content_block":{"type":"tool_use","name":"renamed_tool","id":"t1"}}`
desanitized := san.DesanitizeStreamEvent(event)
if !strings.Contains(desanitized, "original_tool") {
t.Errorf("expected stream event to be desanitized, got %s", desanitized)
}
}
// --- handleNonStream behavior tests via direct function ---
func TestHandleNonStream_ConnectionError(t *testing.T) {
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
tracker := ratelimit.NewTracker(func() string { return "" })
uc := &UpstreamClient{
client: http.Client{Transport: &failingTransport{}},
sessionID: "test-sess",
profile: nil,
}
body := []byte(`{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleNonStream(c, uc, san, pool, cred, body, body, tracker)
if w.Code != http.StatusBadGateway {
t.Errorf("status = %d, want %d", w.Code, http.StatusBadGateway)
}
if !strings.Contains(w.Body.String(), "upstream request failed") {
t.Errorf("body = %q, expected upstream error message", w.Body.String())
}
}
func TestHandleNonStream_UpstreamSuccess(t *testing.T) {
mockUpstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.Header().Set("X-Request-Id", "req-123")
w.WriteHeader(200)
w.Write([]byte(`{"id":"msg_1","type":"message","role":"assistant","content":[{"type":"text","text":"hello"}],"model":"claude-sonnet-4-6","stop_reason":"end_turn","usage":{"input_tokens":10,"output_tokens":5}}`))
}))
defer mockUpstream.Close()
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
tracker := ratelimit.NewTracker(func() string { return "" })
uc := &UpstreamClient{
client: *mockUpstream.Client(),
sessionID: "test-sess",
profile: nil,
}
// Override the messagesURL by constructing a custom Execute that uses the mock.
// Since we can't override the const, we test via a mock server approach:
// We create a custom http.Client with a transport that redirects to our mock.
uc.client.Transport = &rewriteTransport{
base: mockUpstream.Client().Transport,
destURL: mockUpstream.URL,
}
body := []byte(`{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleNonStream(c, uc, san, pool, cred, body, body, tracker)
if w.Code != http.StatusOK {
t.Errorf("status = %d, want %d; body = %s", w.Code, http.StatusOK, w.Body.String())
}
if !strings.Contains(w.Body.String(), "hello") {
t.Errorf("response body missing expected content: %s", w.Body.String())
}
if got := w.Header().Get("Content-Type"); got != "application/json" {
t.Errorf("Content-Type = %q, want %q", got, "application/json")
}
if got := w.Header().Get("X-Request-Id"); got != "req-123" {
t.Errorf("X-Request-Id = %q, want %q", got, "req-123")
}
}
func TestHandleNonStream_UpstreamError_MarkFailure(t *testing.T) {
mockUpstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(429)
w.Write([]byte(`{"error":{"type":"rate_limit_error","message":"too many requests"}}`))
}))
defer mockUpstream.Close()
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
uc := &UpstreamClient{
client: *mockUpstream.Client(),
sessionID: "test-sess",
profile: nil,
}
uc.client.Transport = &rewriteTransport{
base: mockUpstream.Client().Transport,
destURL: mockUpstream.URL,
}
body := []byte(`{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleNonStream(c, uc, san, pool, cred, body, body, nil)
if w.Code != 429 {
t.Errorf("status = %d, want 429", w.Code)
}
// Verify MarkFailure was called — cred should now be on cooldown
if !cred.IsOnCooldown() {
t.Error("expected credential to be on cooldown after 429")
}
}
func TestHandleNonStream_UpstreamSuccess_DesanitizesResponse(t *testing.T) {
mockUpstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(200)
w.Write([]byte(`{"id":"msg_1","type":"message","role":"assistant","content":[{"type":"tool_use","name":"renamed_tool","id":"t1","input":{}}],"model":"claude-sonnet-4-6","stop_reason":"tool_use","usage":{"input_tokens":10,"output_tokens":5}}`))
}))
defer mockUpstream.Close()
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{
Tools: []config.RenameRule{{From: "original_tool", To: "renamed_tool"}},
})
uc := &UpstreamClient{
client: *mockUpstream.Client(),
sessionID: "test-sess",
profile: nil,
}
uc.client.Transport = &rewriteTransport{
base: mockUpstream.Client().Transport,
destURL: mockUpstream.URL,
}
body := []byte(`{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleNonStream(c, uc, san, pool, cred, body, body, nil)
if w.Code != http.StatusOK {
t.Fatalf("status = %d, want %d; body = %s", w.Code, http.StatusOK, w.Body.String())
}
// Should be desanitized back to original_tool
if !strings.Contains(w.Body.String(), "original_tool") {
t.Errorf("response should contain desanitized tool name 'original_tool', got %s", w.Body.String())
}
}
func TestHandleNonStream_Upstream500_MarkFailure(t *testing.T) {
mockUpstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(500)
w.Write([]byte(`{"error":{"type":"server_error","message":"internal error"}}`))
}))
defer mockUpstream.Close()
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
uc := &UpstreamClient{
client: *mockUpstream.Client(),
sessionID: "test-sess",
profile: nil,
}
uc.client.Transport = &rewriteTransport{
base: mockUpstream.Client().Transport,
destURL: mockUpstream.URL,
}
body := []byte(`{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleNonStream(c, uc, san, pool, cred, body, body, nil)
if w.Code != 500 {
t.Errorf("status = %d, want 500", w.Code)
}
if !cred.IsOnCooldown() {
t.Error("expected credential to be on cooldown after 500")
}
}
// --- handleStream behavior tests ---
func TestHandleStream_ConnectionError(t *testing.T) {
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
uc := &UpstreamClient{
client: http.Client{Transport: &failingTransport{}},
sessionID: "test-sess",
profile: nil,
}
body := []byte(`{"model":"claude-sonnet-4-6","stream":true,"messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleStream(c, uc, san, pool, cred, body, body, nil)
if w.Code != http.StatusBadGateway {
t.Errorf("status = %d, want %d", w.Code, http.StatusBadGateway)
}
if !strings.Contains(w.Body.String(), "upstream stream request failed") {
t.Errorf("body = %q, expected upstream stream error", w.Body.String())
}
}
func TestHandleStream_UpstreamError(t *testing.T) {
mockUpstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(429)
w.Write([]byte(`{"error":{"type":"rate_limit_error","message":"rate limited"}}`))
}))
defer mockUpstream.Close()
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
uc := &UpstreamClient{
client: *mockUpstream.Client(),
sessionID: "test-sess",
profile: nil,
}
uc.client.Transport = &rewriteTransport{
base: mockUpstream.Client().Transport,
destURL: mockUpstream.URL,
}
body := []byte(`{"model":"claude-sonnet-4-6","stream":true,"messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleStream(c, uc, san, pool, cred, body, body, nil)
if w.Code != 429 {
t.Errorf("status = %d, want 429", w.Code)
}
if !cred.IsOnCooldown() {
t.Error("expected credential on cooldown after stream 429")
}
}
func TestHandleStream_SuccessForwardsEvents(t *testing.T) {
events := "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"id\":\"msg_1\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"model\":\"claude-sonnet-4-6\",\"stop_reason\":null,\"usage\":{\"input_tokens\":10,\"output_tokens\":0}}}\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"hello\"}}\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0}\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\"},\"usage\":{\"output_tokens\":5}}\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"}\n\n"
mockUpstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/event-stream")
w.WriteHeader(200)
w.Write([]byte(events))
}))
defer mockUpstream.Close()
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
uc := &UpstreamClient{
client: *mockUpstream.Client(),
sessionID: "test-sess",
profile: nil,
}
uc.client.Transport = &rewriteTransport{
base: mockUpstream.Client().Transport,
destURL: mockUpstream.URL,
}
body := []byte(`{"model":"claude-sonnet-4-6","stream":true,"messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleStream(c, uc, san, pool, cred, body, body, nil)
if w.Code != http.StatusOK {
t.Errorf("status = %d, want %d", w.Code, http.StatusOK)
}
respBody := w.Body.String()
if !strings.Contains(respBody, "message_start") {
t.Error("response missing message_start event")
}
if !strings.Contains(respBody, "hello") {
t.Error("response missing text content 'hello'")
}
if !strings.Contains(respBody, "message_stop") {
t.Error("response missing message_stop event")
}
// Verify SSE headers
if got := w.Header().Get("Content-Type"); got != "text/event-stream" {
t.Errorf("Content-Type = %q, want %q", got, "text/event-stream")
}
}
func TestHandleStream_DesanitizesEvents(t *testing.T) {
events := "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"tool_use\",\"name\":\"renamed_tool\",\"id\":\"t1\"}}\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"tool_use\"},\"usage\":{\"output_tokens\":5}}\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"}\n\n"
mockUpstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/event-stream")
w.WriteHeader(200)
w.Write([]byte(events))
}))
defer mockUpstream.Close()
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{
Tools: []config.RenameRule{{From: "original_tool", To: "renamed_tool"}},
})
uc := &UpstreamClient{
client: *mockUpstream.Client(),
sessionID: "test-sess",
profile: nil,
}
uc.client.Transport = &rewriteTransport{
base: mockUpstream.Client().Transport,
destURL: mockUpstream.URL,
}
body := []byte(`{"model":"claude-sonnet-4-6","stream":true,"messages":[{"role":"user","content":"hi"}]}`)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", bytes.NewReader(body))
handleStream(c, uc, san, pool, cred, body, body, nil)
if w.Code != http.StatusOK {
t.Fatalf("status = %d, want %d; body = %s", w.Code, http.StatusOK, w.Body.String())
}
if !strings.Contains(w.Body.String(), "original_tool") {
t.Errorf("stream response should contain desanitized 'original_tool', got %s", w.Body.String())
}
}
// --- HandleMessages full integration wiring test ---
func TestHandleMessages_WiresHandlerCorrectly(t *testing.T) {
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
// Verify the handler can be created without panic
handler := HandleMessages(pool, nil, func() *Sanitizer { return san }, nil)
if handler == nil {
t.Fatal("HandleMessages returned nil handler")
}
}
func TestHandleMessages_EmptyBody(t *testing.T) {
cred := &auth.Credential{ID: "c1", AccessToken: "tok", Email: "test@test.com"}
pool := auth.NewPool([]*auth.Credential{cred})
san := NewSanitizer(config.SanitizeConfig{})
handler := HandleMessages(pool, nil, func() *Sanitizer { return san }, nil)
// Empty body — handler should still try to pick cred and call upstream
// (which will fail with connection error to api.anthropic.com, not a panic)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", strings.NewReader(""))
handler(c)
// Should get a 502 because the upstream URL (api.anthropic.com) won't be reachable
// in test environment, or it might complete. The key thing is no panic.
// We mainly verify it doesn't panic.
if w.Code == 0 {
t.Error("expected non-zero status code")
}
}
// --- Test helpers ---
// errReader is an io.Reader that always returns an error.
type errReader struct{}
func (e *errReader) Read([]byte) (int, error) {
return 0, io.ErrUnexpectedEOF
}
// failingTransport is an http.RoundTripper that always returns an error.
type failingTransport struct{}
func (f *failingTransport) RoundTrip(*http.Request) (*http.Response, error) {
return nil, fmt.Errorf("connection refused")
}
// rewriteTransport intercepts HTTP requests and rewrites the URL to point
// at a local test server. This allows testing with UpstreamClient's hardcoded
// messagesURL by redirecting all requests to a mock server.
type rewriteTransport struct {
base http.RoundTripper
destURL string
}
func (t *rewriteTransport) RoundTrip(req *http.Request) (*http.Response, error) {
// Rewrite the request URL to point at our mock server
newReq := req.Clone(req.Context())
newReq.URL.Scheme = "http"
newReq.URL.Host = strings.TrimPrefix(t.destURL, "http://")
newReq.URL.Path = "/v1/messages"
newReq.URL.RawQuery = ""
if t.base == nil {
return http.DefaultTransport.RoundTrip(newReq)
}
return t.base.RoundTrip(newReq)
}
internal/proxy/sanitize.go
+21 -4
View File
@@ -4,6 +4,7 @@ import (
"strconv"
"strings"
"github.com/rs/zerolog/log"
"github.com/tidwall/gjson"
"github.com/tidwall/sjson"
@@ -49,7 +50,11 @@ func (s *Sanitizer) DesanitizeResponse(body []byte) []byte {
}
name := block.Get("name").String()
if orig, ok := s.toolsReverse[name]; ok {
body, _ = sjson.SetBytes(body, "content."+strconv.Itoa(i)+".name", orig)
if b, err := sjson.SetBytes(body, "content."+strconv.Itoa(i)+".name", orig); err != nil {
log.Warn().Err(err).Str("tool", name).Msg("desanitize response: set name failed")
} else {
body = b
}
}
}
return body
@@ -64,10 +69,14 @@ func (s *Sanitizer) DesanitizeStreamEvent(line string) string {
for _, path := range []string{"content_block.name", "delta.name"} {
name := gjson.GetBytes(data, path).String()
if orig, ok := s.toolsReverse[name]; ok {
data, _ = sjson.SetBytes(data, path, orig)
if b, err := sjson.SetBytes(data, path, orig); err != nil {
log.Warn().Err(err).Str("tool", name).Msg("desanitize stream event: set name failed")
} else {
data = b
changed = true
}
}
}
if changed {
return "data: " + string(data)
}
@@ -85,7 +94,11 @@ func (s *Sanitizer) renameTools(body []byte) []byte {
for i, tool := range tools.Array() {
name := tool.Get("name").String()
if newName, ok := s.toolsForward[name]; ok {
body, _ = sjson.SetBytes(body, "tools."+strconv.Itoa(i)+".name", newName)
if b, err := sjson.SetBytes(body, "tools."+strconv.Itoa(i)+".name", newName); err != nil {
log.Warn().Err(err).Str("tool", name).Msg("rename tool failed")
} else {
body = b
}
}
}
return body
@@ -104,7 +117,11 @@ func (s *Sanitizer) replaceSystem(body []byte) []byte {
for _, rule := range s.systemRules {
text = strings.ReplaceAll(text, rule.Match, rule.Replace)
}
body, _ = sjson.SetBytes(body, "system."+strconv.Itoa(i)+".text", text)
if b, err := sjson.SetBytes(body, "system."+strconv.Itoa(i)+".text", text); err != nil {
log.Warn().Err(err).Int("block", i).Msg("replace system text failed")
} else {
body = b
}
}
return body
}
internal/proxy/sanitize_test.go
+476
View File
@@ -0,0 +1,476 @@
package proxy
import (
"strings"
"testing"
"github.com/fujin/anthropic-proxy/internal/config"
)
func TestNewSanitizer_Empty(t *testing.T) {
s := NewSanitizer(config.SanitizeConfig{})
if len(s.toolsForward) != 0 {
t.Errorf("expected empty toolsForward, got %d entries", len(s.toolsForward))
}
if len(s.toolsReverse) != 0 {
t.Errorf("expected empty toolsReverse, got %d entries", len(s.toolsReverse))
}
if s.systemRules != nil {
t.Errorf("expected nil systemRules")
}
if s.bodyRules != nil {
t.Errorf("expected nil bodyRules")
}
}
func TestNewSanitizer_WithTools(t *testing.T) {
cfg := config.SanitizeConfig{
Tools: []config.RenameRule{
{From: "old_tool", To: "new_tool"},
{From: "another", To: "replaced"},
},
}
s := NewSanitizer(cfg)
if got := s.toolsForward["old_tool"]; got != "new_tool" {
t.Errorf("toolsForward[old_tool] = %q, want %q", got, "new_tool")
}
if got := s.toolsReverse["new_tool"]; got != "old_tool" {
t.Errorf("toolsReverse[new_tool] = %q, want %q", got, "old_tool")
}
if got := s.toolsForward["another"]; got != "replaced" {
t.Errorf("toolsForward[another] = %q, want %q", got, "replaced")
}
if got := s.toolsReverse["replaced"]; got != "another" {
t.Errorf("toolsReverse[replaced] = %q, want %q", got, "another")
}
}
func TestNewSanitizer_WithSystemAndBodyRules(t *testing.T) {
cfg := config.SanitizeConfig{
System: []config.ReplaceRule{{Match: "foo", Replace: "bar"}},
Body: []config.ReplaceRule{{Match: "baz", Replace: "qux"}},
}
s := NewSanitizer(cfg)
if len(s.systemRules) != 1 || s.systemRules[0].Match != "foo" {
t.Errorf("systemRules not set correctly")
}
if len(s.bodyRules) != 1 || s.bodyRules[0].Match != "baz" {
t.Errorf("bodyRules not set correctly")
}
}
func TestRenameTools(t *testing.T) {
tests := []struct {
name string
forward map[string]string
body string
expected string
}{
{
name: "empty map returns body unchanged",
forward: map[string]string{},
body: `{"tools":[{"name":"my_tool"}]}`,
expected: `{"tools":[{"name":"my_tool"}]}`,
},
{
name: "no tools array returns body unchanged",
forward: map[string]string{"my_tool": "renamed"},
body: `{"messages":[]}`,
expected: `{"messages":[]}`,
},
{
name: "tools is not array returns body unchanged",
forward: map[string]string{"my_tool": "renamed"},
body: `{"tools":"not_array"}`,
expected: `{"tools":"not_array"}`,
},
{
name: "matching tool gets renamed",
forward: map[string]string{"my_tool": "renamed_tool"},
body: `{"tools":[{"name":"my_tool","description":"desc"}]}`,
expected: `renamed_tool`,
},
{
name: "non-matching tool unchanged",
forward: map[string]string{"other_tool": "renamed"},
body: `{"tools":[{"name":"my_tool"}]}`,
expected: `my_tool`,
},
{
name: "partial match - only exact match renames",
forward: map[string]string{"tool_a": "tool_x", "tool_b": "tool_y"},
body: `{"tools":[{"name":"tool_a"},{"name":"tool_c"},{"name":"tool_b"}]}`,
expected: `tool_x`,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := &Sanitizer{
toolsForward: tt.forward,
toolsReverse: make(map[string]string),
}
result := string(s.renameTools([]byte(tt.body)))
if !strings.Contains(result, tt.expected) {
t.Errorf("result %q does not contain %q", result, tt.expected)
}
})
}
}
func TestRenameTools_MultipleTools(t *testing.T) {
s := &Sanitizer{
toolsForward: map[string]string{"tool_a": "tool_x", "tool_b": "tool_y"},
toolsReverse: make(map[string]string),
}
body := `{"tools":[{"name":"tool_a"},{"name":"tool_c"},{"name":"tool_b"}]}`
result := string(s.renameTools([]byte(body)))
if !strings.Contains(result, `"tool_x"`) {
t.Errorf("tool_a should be renamed to tool_x, got %s", result)
}
if !strings.Contains(result, `"tool_y"`) {
t.Errorf("tool_b should be renamed to tool_y, got %s", result)
}
if !strings.Contains(result, `"tool_c"`) {
t.Errorf("tool_c should remain unchanged, got %s", result)
}
}
func TestReplaceSystem(t *testing.T) {
tests := []struct {
name string
rules []config.ReplaceRule
body string
contains string
}{
{
name: "empty rules returns body unchanged",
rules: nil,
body: `{"system":[{"type":"text","text":"hello world"}]}`,
contains: "hello world",
},
{
name: "no system field returns body unchanged",
rules: []config.ReplaceRule{{Match: "hello", Replace: "goodbye"}},
body: `{"messages":[]}`,
contains: `"messages":[]`,
},
{
name: "system not array returns body unchanged",
rules: []config.ReplaceRule{{Match: "hello", Replace: "goodbye"}},
body: `{"system":"just a string"}`,
contains: "just a string",
},
{
name: "single block single rule",
rules: []config.ReplaceRule{{Match: "hello", Replace: "goodbye"}},
body: `{"system":[{"type":"text","text":"hello world"}]}`,
contains: "goodbye world",
},
{
name: "multiple blocks",
rules: []config.ReplaceRule{{Match: "AAA", Replace: "BBB"}},
body: `{"system":[{"type":"text","text":"AAA first"},{"type":"text","text":"AAA second"}]}`,
contains: "BBB first",
},
{
name: "multiple rules applied in order",
rules: []config.ReplaceRule{{Match: "cat", Replace: "dog"}, {Match: "dog", Replace: "fish"}},
body: `{"system":[{"type":"text","text":"I have a cat"}]}`,
contains: "I have a fish",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := &Sanitizer{
toolsForward: make(map[string]string),
toolsReverse: make(map[string]string),
systemRules: tt.rules,
}
result := string(s.replaceSystem([]byte(tt.body)))
if !strings.Contains(result, tt.contains) {
t.Errorf("result %q does not contain %q", result, tt.contains)
}
})
}
}
func TestReplaceSystem_MultipleBlocks(t *testing.T) {
s := &Sanitizer{
toolsForward: make(map[string]string),
toolsReverse: make(map[string]string),
systemRules: []config.ReplaceRule{{Match: "AAA", Replace: "BBB"}},
}
body := `{"system":[{"type":"text","text":"AAA first"},{"type":"text","text":"AAA second"}]}`
result := string(s.replaceSystem([]byte(body)))
if !strings.Contains(result, "BBB first") {
t.Errorf("first block not replaced: %s", result)
}
if !strings.Contains(result, "BBB second") {
t.Errorf("second block not replaced: %s", result)
}
}
func TestReplaceBody(t *testing.T) {
tests := []struct {
name string
rules []config.ReplaceRule
body string
expected string
}{
{
name: "empty rules returns body unchanged",
rules: nil,
body: `{"foo":"bar"}`,
expected: `{"foo":"bar"}`,
},
{
name: "single replacement across entire body",
rules: []config.ReplaceRule{{Match: "SECRET", Replace: "REDACTED"}},
body: `{"data":"SECRET value SECRET"}`,
expected: `{"data":"REDACTED value REDACTED"}`,
},
{
name: "multiple rules applied sequentially",
rules: []config.ReplaceRule{{Match: "AAA", Replace: "BBB"}, {Match: "BBB", Replace: "CCC"}},
body: `{"text":"AAA"}`,
expected: `{"text":"CCC"}`,
},
{
name: "no match leaves body unchanged",
rules: []config.ReplaceRule{{Match: "NOMATCH", Replace: "X"}},
body: `{"text":"hello"}`,
expected: `{"text":"hello"}`,
},
{
name: "empty body",
rules: []config.ReplaceRule{{Match: "a", Replace: "b"}},
body: ``,
expected: ``,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := &Sanitizer{
toolsForward: make(map[string]string),
toolsReverse: make(map[string]string),
bodyRules: tt.rules,
}
result := string(s.replaceBody([]byte(tt.body)))
if result != tt.expected {
t.Errorf("got %q, want %q", result, tt.expected)
}
})
}
}
func TestSanitizeRequest(t *testing.T) {
cfg := config.SanitizeConfig{
Tools: []config.RenameRule{{From: "my_tool", To: "renamed_tool"}},
System: []config.ReplaceRule{{Match: "INTERNAL", Replace: "PUBLIC"}},
Body: []config.ReplaceRule{{Match: "secret_val", Replace: "safe_val"}},
}
s := NewSanitizer(cfg)
body := `{"tools":[{"name":"my_tool"}],"system":[{"type":"text","text":"INTERNAL info"}],"data":"secret_val here"}`
result := string(s.SanitizeRequest([]byte(body)))
if !strings.Contains(result, `"renamed_tool"`) {
t.Errorf("tool not renamed in result: %s", result)
}
if !strings.Contains(result, "PUBLIC info") {
t.Errorf("system not replaced in result: %s", result)
}
if !strings.Contains(result, "safe_val here") {
t.Errorf("body not replaced in result: %s", result)
}
if strings.Contains(result, "secret_val") {
t.Errorf("secret_val should have been replaced: %s", result)
}
}
func TestSanitizeRequest_EmptyConfig(t *testing.T) {
s := NewSanitizer(config.SanitizeConfig{})
body := `{"tools":[{"name":"my_tool"}],"system":[{"type":"text","text":"hello"}]}`
result := string(s.SanitizeRequest([]byte(body)))
if result != body {
t.Errorf("empty config should not modify body.\ngot: %s\nwant: %s", result, body)
}
}
func TestDesanitizeResponse(t *testing.T) {
tests := []struct {
name string
reverse map[string]string
body string
expected string
}{
{
name: "no content field returns unchanged",
reverse: map[string]string{"renamed": "original"},
body: `{"id":"msg_1","role":"assistant"}`,
expected: `{"id":"msg_1","role":"assistant"}`,
},
{
name: "content not array returns unchanged",
reverse: map[string]string{"renamed": "original"},
body: `{"content":"just text"}`,
expected: `{"content":"just text"}`,
},
{
name: "non-tool_use block left unchanged",
reverse: map[string]string{"renamed": "original"},
body: `{"content":[{"type":"text","text":"hello"}]}`,
expected: `{"content":[{"type":"text","text":"hello"}]}`,
},
{
name: "tool_use block with matching name gets reversed",
reverse: map[string]string{"renamed_tool": "original_tool"},
body: `{"content":[{"type":"tool_use","name":"renamed_tool","id":"t1"}]}`,
expected: `original_tool`,
},
{
name: "tool_use block with no match unchanged",
reverse: map[string]string{"other": "something"},
body: `{"content":[{"type":"tool_use","name":"my_tool","id":"t1"}]}`,
expected: `my_tool`,
},
{
name: "mixed blocks only tool_use reversed",
reverse: map[string]string{"renamed": "original"},
body: `{"content":[{"type":"text","text":"hi"},{"type":"tool_use","name":"renamed","id":"t1"}]}`,
expected: `original`,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := &Sanitizer{
toolsForward: make(map[string]string),
toolsReverse: tt.reverse,
}
result := string(s.DesanitizeResponse([]byte(tt.body)))
if !strings.Contains(result, tt.expected) {
t.Errorf("result %q does not contain %q", result, tt.expected)
}
})
}
}
func TestDesanitizeResponse_MultipleToolUse(t *testing.T) {
s := &Sanitizer{
toolsForward: make(map[string]string),
toolsReverse: map[string]string{"r1": "o1", "r2": "o2"},
}
body := `{"content":[{"type":"tool_use","name":"r1","id":"t1"},{"type":"text","text":"x"},{"type":"tool_use","name":"r2","id":"t2"}]}`
result := string(s.DesanitizeResponse([]byte(body)))
if !strings.Contains(result, `"o1"`) {
t.Errorf("r1 not reversed to o1: %s", result)
}
if !strings.Contains(result, `"o2"`) {
t.Errorf("r2 not reversed to o2: %s", result)
}
}
func TestDesanitizeStreamEvent(t *testing.T) {
tests := []struct {
name string
reverse map[string]string
line string
expected string
}{
{
name: "non-data line passed through",
reverse: map[string]string{"r": "o"},
line: "event: content_block_start",
expected: "event: content_block_start",
},
{
name: "data line without tool_use passed through",
reverse: map[string]string{"r": "o"},
line: `data: {"type":"text","text":"hello"}`,
expected: `data: {"type":"text","text":"hello"}`,
},
{
name: "data line with tool_use in content_block.name",
reverse: map[string]string{"renamed_tool": "original_tool"},
line: `data: {"type":"content_block_start","content_block":{"type":"tool_use","name":"renamed_tool","id":"t1"}}`,
expected: `original_tool`,
},
{
name: "data line with tool_use in delta.name",
reverse: map[string]string{"renamed_tool": "original_tool"},
line: `data: {"type":"content_block_delta","delta":{"type":"tool_use","name":"renamed_tool"}}`,
expected: `original_tool`,
},
{
name: "data line with tool_use but no matching name",
reverse: map[string]string{"other": "something"},
line: `data: {"type":"content_block_start","content_block":{"type":"tool_use","name":"my_tool","id":"t1"}}`,
expected: `my_tool`,
},
{
name: "empty line passed through",
reverse: map[string]string{"r": "o"},
line: "",
expected: "",
},
{
name: "line contains tool_use but not data prefix - passed through",
reverse: map[string]string{"r": "o"},
line: "event: tool_use",
expected: "event: tool_use",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := &Sanitizer{
toolsForward: make(map[string]string),
toolsReverse: tt.reverse,
}
result := s.DesanitizeStreamEvent(tt.line)
if !strings.Contains(result, tt.expected) {
t.Errorf("result %q does not contain %q", result, tt.expected)
}
})
}
}
func TestDesanitizeStreamEvent_DataPrefixPreserved(t *testing.T) {
s := &Sanitizer{
toolsForward: make(map[string]string),
toolsReverse: map[string]string{"renamed": "original"},
}
line := `data: {"type":"content_block_start","content_block":{"type":"tool_use","name":"renamed","id":"t1"}}`
result := s.DesanitizeStreamEvent(line)
if !strings.HasPrefix(result, "data: ") {
t.Errorf("result should start with 'data: ', got %q", result)
}
}
func TestSanitizeRequest_MalformedJSON(t *testing.T) {
s := NewSanitizer(config.SanitizeConfig{
Tools: []config.RenameRule{{From: "a", To: "b"}},
System: []config.ReplaceRule{{Match: "x", Replace: "y"}},
})
// Malformed JSON - renameTools and replaceSystem should handle gracefully
body := `not valid json`
result := string(s.SanitizeRequest([]byte(body)))
// Should not panic; body rules still do string replacement
if result != "not valid json" {
t.Errorf("malformed JSON should pass through (no body rules match), got %q", result)
}
}
func TestSanitizeRequest_EmptyBody(t *testing.T) {
s := NewSanitizer(config.SanitizeConfig{
Tools: []config.RenameRule{{From: "a", To: "b"}},
})
result := s.SanitizeRequest([]byte{})
if len(result) != 0 {
t.Errorf("empty body should return empty, got %q", string(result))
}
}
internal/proxy/sniff.go
+53 -41
View File
@@ -36,6 +36,21 @@ var skipHeaders = map[string]bool{
"connection": true,
}
const fakeJSONResponse = `{"id":"msg_fake","type":"message","role":"assistant","content":[{"type":"text","text":"ok"}],"model":"claude-sonnet-4-6","stop_reason":"end_turn","usage":{"input_tokens":1,"output_tokens":1}}`
const fakeStreamResponse = "event: message_start\n" +
"data: {\"type\":\"message_start\",\"message\":{\"id\":\"msg_fake\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"model\":\"claude-sonnet-4-6\",\"stop_reason\":null,\"usage\":{\"input_tokens\":1,\"output_tokens\":1}}}\n\n" +
"event: content_block_start\n" +
"data: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}}\n\n" +
"event: content_block_delta\n" +
"data: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"ok\"}}\n\n" +
"event: content_block_stop\n" +
"data: {\"type\":\"content_block_stop\",\"index\":0}\n\n" +
"event: message_delta\n" +
"data: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\"},\"usage\":{\"output_tokens\":1}}\n\n" +
"event: message_stop\n" +
"data: {\"type\":\"message_stop\"}\n\n"
func SniffClaudeCode(claudeBinary string) (*SniffedProfile, error) {
listener, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
@@ -48,45 +63,7 @@ func SniffClaudeCode(claudeBinary string) (*SniffedProfile, error) {
captured := make(chan struct{}, 1)
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
if r.Method == "HEAD" {
w.WriteHeader(200)
return
}
if r.Method != "POST" || !strings.Contains(r.URL.Path, "/v1/messages") {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(200)
fmt.Fprint(w, `{"id":"msg_fake","type":"message","role":"assistant","content":[{"type":"text","text":"ok"}],"model":"claude-sonnet-4-6","stop_reason":"end_turn","usage":{"input_tokens":1,"output_tokens":1}}`)
return
}
body, _ := io.ReadAll(r.Body)
mu.Lock()
if profile == nil {
profile = extractProfile(r, body)
select {
case captured <- struct{}{}:
default:
}
}
mu.Unlock()
if strings.Contains(string(body), `"stream":true`) {
w.Header().Set("Content-Type", "text/event-stream")
w.WriteHeader(200)
fmt.Fprint(w, "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"id\":\"msg_fake\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"model\":\"claude-sonnet-4-6\",\"stop_reason\":null,\"usage\":{\"input_tokens\":1,\"output_tokens\":1}}}\n\n")
fmt.Fprint(w, "event: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}}\n\n")
fmt.Fprint(w, "event: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"ok\"}}\n\n")
fmt.Fprint(w, "event: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0}\n\n")
fmt.Fprint(w, "event: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\"},\"usage\":{\"output_tokens\":1}}\n\n")
fmt.Fprint(w, "event: message_stop\ndata: {\"type\":\"message_stop\"}\n\n")
} else {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(200)
fmt.Fprint(w, `{"id":"msg_fake","type":"message","role":"assistant","content":[{"type":"text","text":"ok"}],"model":"claude-sonnet-4-6","stop_reason":"end_turn","usage":{"input_tokens":1,"output_tokens":1}}`)
}
})
mux.HandleFunc("/", sniffHandler(&mu, &profile, captured))
srv := &http.Server{Handler: mux}
go srv.Serve(listener)
@@ -130,8 +107,44 @@ func SniffClaudeCode(claudeBinary string) (*SniffedProfile, error) {
return profile, nil
}
func sniffHandler(mu *sync.Mutex, profile **SniffedProfile, captured chan<- struct{}) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
if r.Method == "HEAD" {
w.WriteHeader(200)
return
}
if r.Method != "POST" || !strings.Contains(r.URL.Path, "/v1/messages") {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(200)
fmt.Fprint(w, fakeJSONResponse)
return
}
body, _ := io.ReadAll(r.Body)
mu.Lock()
if *profile == nil {
*profile = extractProfile(r, body)
select {
case captured <- struct{}{}:
default:
}
}
mu.Unlock()
if strings.Contains(string(body), `"stream":true`) {
w.Header().Set("Content-Type", "text/event-stream")
w.WriteHeader(200)
fmt.Fprint(w, fakeStreamResponse)
} else {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(200)
fmt.Fprint(w, fakeJSONResponse)
}
}
}
func extractProfile(r *http.Request, body []byte) *SniffedProfile {
// Capture raw headers preserving original casing.
var headers [][2]string
for name, vals := range r.Header {
if skipHeaders[strings.ToLower(name)] {
@@ -142,7 +155,6 @@ func extractProfile(r *http.Request, body []byte) *SniffedProfile {
}
}
// Deduplicate and strip subscription-specific betas.
seen := map[string]bool{}
var deduped [][2]string
for _, h := range headers {
internal/proxy/sniff_test.go
+278
View File
@@ -0,0 +1,278 @@
package proxy
import (
"net/http"
"net/http/httptest"
"strings"
"testing"
)
func newRequest(t *testing.T, headers map[string][]string) *http.Request {
t.Helper()
r := httptest.NewRequest("POST", "/v1/messages", nil)
r.Header = http.Header{}
for k, vals := range headers {
for _, v := range vals {
r.Header.Add(k, v)
}
}
return r
}
func TestExtractProfile_BasicHeaders(t *testing.T) {
r := newRequest(t, map[string][]string{
"Content-Type": {"application/json"},
"X-Custom-Header": {"custom-value"},
"User-Agent": {"Claude/1.2.3 linux"},
})
body := []byte(`{"model":"claude-sonnet-4-6"}`)
p := extractProfile(r, body)
// Check version parsed
if p.Version != "1.2.3" {
t.Errorf("version = %q, want %q", p.Version, "1.2.3")
}
// Check body preserved
if string(p.Body) != string(body) {
t.Errorf("body not preserved")
}
// Check headers captured
found := map[string]bool{}
for _, h := range p.Headers {
found[strings.ToLower(h[0])] = true
}
if !found["content-type"] {
t.Error("Content-Type header should be captured")
}
if !found["x-custom-header"] {
t.Error("X-Custom-Header should be captured")
}
}
func TestExtractProfile_SkipHeaders(t *testing.T) {
r := newRequest(t, map[string][]string{
"Host": {"example.com"},
"Content-Length": {"42"},
"Authorization": {"Bearer token123"},
"X-Api-Key": {"key123"},
"Connection": {"keep-alive"},
"Content-Type": {"application/json"},
"X-Custom": {"keep-me"},
})
p := extractProfile(r, []byte(`{}`))
for _, h := range p.Headers {
lower := strings.ToLower(h[0])
if skipHeaders[lower] {
t.Errorf("header %q should have been skipped", h[0])
}
}
// Verify non-skipped headers are present
found := map[string]bool{}
for _, h := range p.Headers {
found[strings.ToLower(h[0])] = true
}
if !found["content-type"] {
t.Error("Content-Type should be kept")
}
if !found["x-custom"] {
t.Error("X-Custom should be kept")
}
}
func TestExtractProfile_HeaderDeduplication(t *testing.T) {
r := newRequest(t, map[string][]string{
"Content-Type": {"application/json"},
})
// Add duplicate with different casing - Go's http.Header normalizes to canonical form
// so we need to add the same canonical header with multiple values to test dedup
r.Header.Add("Content-Type", "text/plain")
p := extractProfile(r, []byte(`{}`))
// After deduplication by lowercase key, only one entry per key
seen := map[string]int{}
for _, h := range p.Headers {
seen[strings.ToLower(h[0])]++
}
for key, count := range seen {
if count > 1 {
t.Errorf("header %q appears %d times after dedup, want 1", key, count)
}
}
}
func TestExtractProfile_AnthropicBetaContextStripping(t *testing.T) {
r := newRequest(t, map[string][]string{
"Anthropic-Beta": {"prompt-caching-2024-07-31,context-1m-2024-09-01,some-other-beta"},
})
p := extractProfile(r, []byte(`{}`))
var betaValue string
for _, h := range p.Headers {
if strings.ToLower(h[0]) == "anthropic-beta" {
betaValue = h[1]
break
}
}
if strings.Contains(betaValue, "context-1m") {
t.Errorf("context-1m should be stripped from anthropic-beta, got %q", betaValue)
}
if !strings.Contains(betaValue, "prompt-caching-2024-07-31") {
t.Errorf("prompt-caching should be preserved, got %q", betaValue)
}
if !strings.Contains(betaValue, "some-other-beta") {
t.Errorf("some-other-beta should be preserved, got %q", betaValue)
}
}
func TestExtractProfile_AnthropicBetaAllContextRemoved(t *testing.T) {
r := newRequest(t, map[string][]string{
"Anthropic-Beta": {"context-1m-2024-09-01"},
})
p := extractProfile(r, []byte(`{}`))
for _, h := range p.Headers {
if strings.ToLower(h[0]) == "anthropic-beta" {
// All betas were context-1m, so after filtering the value should be empty
if h[1] != "" {
t.Errorf("all context-1m betas stripped should leave empty, got %q", h[1])
}
return
}
}
// It's also acceptable if the header is still present but empty
}
func TestExtractProfile_VersionParsing(t *testing.T) {
tests := []struct {
name string
userAgent string
expected string
}{
{
name: "standard Claude UA",
userAgent: "Claude/1.2.3 linux x86_64",
expected: "1.2.3",
},
{
name: "version with no space after",
userAgent: "Claude/4.5.6",
expected: "4.5.6",
},
{
name: "no slash in UA",
userAgent: "Mozilla 5.0",
expected: "",
},
{
name: "empty UA",
userAgent: "",
expected: "",
},
{
name: "slash at start",
userAgent: "/1.0.0 rest",
expected: "",
},
{
name: "multiple slashes",
userAgent: "App/1.0.0 (sub/2.0)",
expected: "1.0.0",
},
{
name: "version only after slash no space",
userAgent: "Tool/9.8.7",
expected: "9.8.7",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
r := newRequest(t, map[string][]string{
"User-Agent": {tt.userAgent},
})
p := extractProfile(r, []byte(`{}`))
if p.Version != tt.expected {
t.Errorf("version = %q, want %q", p.Version, tt.expected)
}
})
}
}
func TestExtractProfile_EmptyHeaders(t *testing.T) {
r := httptest.NewRequest("POST", "/v1/messages", nil)
r.Header = http.Header{}
p := extractProfile(r, []byte(`{"test":true}`))
if len(p.Headers) != 0 {
t.Errorf("expected no headers, got %d", len(p.Headers))
}
if p.Version != "" {
t.Errorf("expected empty version with no UA, got %q", p.Version)
}
if string(p.Body) != `{"test":true}` {
t.Errorf("body not preserved")
}
}
func TestExtractProfile_BodyPreserved(t *testing.T) {
r := newRequest(t, map[string][]string{
"User-Agent": {"Claude/1.0.0 test"},
})
body := []byte(`{"model":"claude-sonnet-4-6","messages":[{"role":"user","content":"hello"}],"stream":true}`)
p := extractProfile(r, body)
if string(p.Body) != string(body) {
t.Errorf("body not preserved.\ngot: %s\nwant: %s", p.Body, body)
}
}
func TestSkipHeaders_Entries(t *testing.T) {
expected := map[string]bool{
"host": true,
"content-length": true,
"authorization": true,
"x-api-key": true,
"connection": true,
}
if len(skipHeaders) != len(expected) {
t.Errorf("skipHeaders has %d entries, want %d", len(skipHeaders), len(expected))
}
for k, v := range expected {
if skipHeaders[k] != v {
t.Errorf("skipHeaders[%q] = %v, want %v", k, skipHeaders[k], v)
}
}
}
func TestSniffedProfile_Fields(t *testing.T) {
// Verify the struct can hold all expected data
p := &SniffedProfile{
Headers: [][2]string{{"Content-Type", "application/json"}},
Body: []byte(`{}`),
Version: "1.0.0",
}
if len(p.Headers) != 1 {
t.Error("Headers should have 1 entry")
}
if p.Headers[0][0] != "Content-Type" || p.Headers[0][1] != "application/json" {
t.Error("Header not stored correctly")
}
if string(p.Body) != `{}` {
t.Error("Body not stored correctly")
}
if p.Version != "1.0.0" {
t.Error("Version not stored correctly")
}
}
internal/proxy/upstream.go
+4 -2
View File
@@ -13,6 +13,8 @@ import (
"github.com/fujin/anthropic-proxy/internal/auth"
"github.com/fujin/anthropic-proxy/internal/logging"
"github.com/fujin/anthropic-proxy/internal/transport"
"github.com/fujin/anthropic-proxy/internal/version"
)
const messagesURL = "https://api.anthropic.com/v1/messages?beta=true"
@@ -27,7 +29,7 @@ func NewUpstreamClient(profile *SniffedProfile) *UpstreamClient {
return &UpstreamClient{
client: http.Client{
Timeout: 0,
Transport: newUtlsRoundTripper(),
Transport: transport.NewUTLS(),
},
sessionID: uuid.New().String(),
profile: profile,
@@ -38,7 +40,7 @@ func (u *UpstreamClient) version() string {
if u.profile != nil && u.profile.Version != "" {
return u.profile.Version
}
return "2.1.92"
return version.ClaudeCodeFallback
}
// applyHeaders replays sniffed headers, substituting auth + per-request IDs + accept.
internal/proxy/upstream_test.go
+334
View File
@@ -0,0 +1,334 @@
package proxy
import (
"net/http"
"strings"
"testing"
)
// --- NewUpstreamClient ---
func TestNewUpstreamClient_NilProfile(t *testing.T) {
uc := NewUpstreamClient(nil)
if uc == nil {
t.Fatal("NewUpstreamClient returned nil")
}
if uc.sessionID == "" {
t.Error("expected non-empty sessionID")
}
if uc.profile != nil {
t.Error("expected nil profile")
}
}
func TestNewUpstreamClient_WithProfile(t *testing.T) {
profile := &SniffedProfile{
Version: "1.2.3",
Headers: [][2]string{{"User-Agent", "test/1.0"}},
}
uc := NewUpstreamClient(profile)
if uc.profile != profile {
t.Error("expected profile to be stored")
}
if uc.sessionID == "" {
t.Error("expected non-empty sessionID")
}
}
func TestNewUpstreamClient_UniqueSessionIDs(t *testing.T) {
uc1 := NewUpstreamClient(nil)
uc2 := NewUpstreamClient(nil)
if uc1.sessionID == uc2.sessionID {
t.Errorf("expected different session IDs, both got %q", uc1.sessionID)
}
}
// --- version() ---
func TestVersion_WithProfileVersion(t *testing.T) {
uc := &UpstreamClient{
profile: &SniffedProfile{Version: "3.5.7"},
}
if got := uc.version(); got != "3.5.7" {
t.Errorf("version() = %q, want %q", got, "3.5.7")
}
}
func TestVersion_NilProfile_Fallback(t *testing.T) {
uc := &UpstreamClient{profile: nil}
if got := uc.version(); got != "2.1.92" {
t.Errorf("version() = %q, want %q", got, "2.1.92")
}
}
func TestVersion_EmptyProfileVersion_Fallback(t *testing.T) {
uc := &UpstreamClient{
profile: &SniffedProfile{Version: ""},
}
if got := uc.version(); got != "2.1.92" {
t.Errorf("version() = %q, want %q", got, "2.1.92")
}
}
// --- applyHeaders ---
func TestApplyHeaders_NilProfile_NonOAuth_NonStream(t *testing.T) {
uc := &UpstreamClient{
sessionID: "test-session-id",
profile: nil,
}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-api123", false)
// x-api-key for non-OAuth token
if got := req.Header.Get("x-api-key"); got != "sk-ant-api123" {
t.Errorf("x-api-key = %q, want %q", got, "sk-ant-api123")
}
// Should NOT have Authorization
if got := req.Header.Get("Authorization"); got != "" {
t.Errorf("Authorization = %q, want empty", got)
}
// Session ID
if got := req.Header.Get("X-Claude-Code-Session-Id"); got != "test-session-id" {
t.Errorf("X-Claude-Code-Session-Id = %q, want %q", got, "test-session-id")
}
// Request ID should be a UUID
if got := req.Header.Get("x-client-request-id"); got == "" {
t.Error("expected non-empty x-client-request-id")
}
// Non-stream: application/json
if got := req.Header.Get("Accept"); got != "application/json" {
t.Errorf("Accept = %q, want %q", got, "application/json")
}
// Accept-Encoding always identity
if got := req.Header.Get("Accept-Encoding"); got != "identity" {
t.Errorf("Accept-Encoding = %q, want %q", got, "identity")
}
}
func TestApplyHeaders_NilProfile_NonOAuth_Stream(t *testing.T) {
uc := &UpstreamClient{
sessionID: "sess",
profile: nil,
}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-api123", true)
if got := req.Header.Get("Accept"); got != "text/event-stream" {
t.Errorf("Accept = %q, want %q", got, "text/event-stream")
}
}
func TestApplyHeaders_OAuthToken_SetsBearerAndBetaFlag(t *testing.T) {
uc := &UpstreamClient{
sessionID: "sess",
profile: nil,
}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-oat-mytoken", false)
// OAuth: Authorization Bearer
if got := req.Header.Get("Authorization"); got != "Bearer sk-ant-oat-mytoken" {
t.Errorf("Authorization = %q, want %q", got, "Bearer sk-ant-oat-mytoken")
}
// Should NOT have x-api-key
if got := req.Header.Get("x-api-key"); got != "" {
t.Errorf("x-api-key = %q, want empty for OAuth", got)
}
// anthropic-beta should include oauth-2025-04-20
if got := req.Header.Get("anthropic-beta"); got != "oauth-2025-04-20" {
t.Errorf("anthropic-beta = %q, want %q", got, "oauth-2025-04-20")
}
}
func TestApplyHeaders_OAuthToken_AppendsToExistingBeta(t *testing.T) {
uc := &UpstreamClient{
sessionID: "sess",
profile: &SniffedProfile{
Headers: [][2]string{
{"anthropic-beta", "max-tokens-3-5-sonnet-2024-07-15"},
},
},
}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-oat-tok", false)
beta := req.Header.Get("anthropic-beta")
if !strings.Contains(beta, "max-tokens-3-5-sonnet-2024-07-15") {
t.Errorf("anthropic-beta %q should contain existing beta", beta)
}
if !strings.Contains(beta, "oauth-2025-04-20") {
t.Errorf("anthropic-beta %q should contain oauth flag", beta)
}
// Should be appended with comma
if beta != "max-tokens-3-5-sonnet-2024-07-15,oauth-2025-04-20" {
t.Errorf("anthropic-beta = %q, want %q", beta, "max-tokens-3-5-sonnet-2024-07-15,oauth-2025-04-20")
}
}
func TestApplyHeaders_OAuthToken_ExistingBetaAlreadyHasOAuth(t *testing.T) {
uc := &UpstreamClient{
sessionID: "sess",
profile: &SniffedProfile{
Headers: [][2]string{
{"anthropic-beta", "oauth-2025-04-20,something-else"},
},
},
}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-oat-tok", false)
beta := req.Header.Get("anthropic-beta")
// Should NOT duplicate oauth flag
count := strings.Count(beta, "oauth-2025-04-20")
if count != 1 {
t.Errorf("oauth flag appeared %d times in %q, want 1", count, beta)
}
}
func TestApplyHeaders_WithProfile_ReplaysHeaders(t *testing.T) {
uc := &UpstreamClient{
sessionID: "sess",
profile: &SniffedProfile{
Headers: [][2]string{
{"User-Agent", "Claude/1.0"},
{"anthropic-version", "2023-06-01"},
{"Custom-Header", "custom-value"},
},
},
}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-api123", false)
if got := req.Header.Get("User-Agent"); got != "Claude/1.0" {
t.Errorf("User-Agent = %q, want %q", got, "Claude/1.0")
}
if got := req.Header.Get("anthropic-version"); got != "2023-06-01" {
t.Errorf("anthropic-version = %q, want %q", got, "2023-06-01")
}
if got := req.Header.Get("Custom-Header"); got != "custom-value" {
t.Errorf("Custom-Header = %q, want %q", got, "custom-value")
}
}
func TestApplyHeaders_ProfileAuthHeadersRemoved(t *testing.T) {
uc := &UpstreamClient{
sessionID: "sess",
profile: &SniffedProfile{
Headers: [][2]string{
{"Authorization", "Bearer old-token"},
{"x-api-key", "old-api-key"},
{"User-Agent", "test"},
},
},
}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-api-new", false)
// Old auth headers from profile should be removed
if got := req.Header.Get("Authorization"); got != "" {
t.Errorf("Authorization should be empty for non-OAuth, got %q", got)
}
// New auth should be set via x-api-key
if got := req.Header.Get("x-api-key"); got != "sk-ant-api-new" {
t.Errorf("x-api-key = %q, want %q", got, "sk-ant-api-new")
}
// User-Agent from profile should remain
if got := req.Header.Get("User-Agent"); got != "test" {
t.Errorf("User-Agent = %q, want %q", got, "test")
}
}
func TestApplyHeaders_ProfileAuthHeadersRemovedForOAuth(t *testing.T) {
uc := &UpstreamClient{
sessionID: "sess",
profile: &SniffedProfile{
Headers: [][2]string{
{"Authorization", "Bearer old-token"},
{"x-api-key", "old-api-key"},
},
},
}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-oat-new", false)
// Old x-api-key removed
if got := req.Header.Get("x-api-key"); got != "" {
t.Errorf("x-api-key should be empty for OAuth, got %q", got)
}
// New auth set via Authorization
if got := req.Header.Get("Authorization"); got != "Bearer sk-ant-oat-new" {
t.Errorf("Authorization = %q, want %q", got, "Bearer sk-ant-oat-new")
}
}
func TestApplyHeaders_AcceptEncoding_AlwaysIdentity(t *testing.T) {
tests := []struct {
name string
streaming bool
}{
{"non-stream", false},
{"stream", true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
uc := &UpstreamClient{sessionID: "s", profile: nil}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "token", tt.streaming)
if got := req.Header.Get("Accept-Encoding"); got != "identity" {
t.Errorf("Accept-Encoding = %q, want %q", got, "identity")
}
})
}
}
func TestApplyHeaders_UniqueRequestIDs(t *testing.T) {
uc := &UpstreamClient{sessionID: "s", profile: nil}
req1, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req1, "tok", false)
req2, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req2, "tok", false)
id1 := req1.Header.Get("x-client-request-id")
id2 := req2.Header.Get("x-client-request-id")
if id1 == "" || id2 == "" {
t.Fatal("expected non-empty request IDs")
}
if id1 == id2 {
t.Errorf("expected unique request IDs, both got %q", id1)
}
}
func TestApplyHeaders_NonOAuth_NoAnthroPicBetaSet(t *testing.T) {
// Non-OAuth tokens should NOT set anthropic-beta oauth flag
uc := &UpstreamClient{sessionID: "s", profile: nil}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-api123", false)
beta := req.Header.Get("anthropic-beta")
if strings.Contains(beta, "oauth-2025-04-20") {
t.Errorf("non-OAuth token should not have oauth beta flag, got %q", beta)
}
}
func TestApplyHeaders_OAuthToken_FreshBeta(t *testing.T) {
// No profile, no existing beta — should set fresh
uc := &UpstreamClient{sessionID: "s", profile: nil}
req, _ := http.NewRequest(http.MethodPost, "https://example.com", nil)
uc.applyHeaders(req, "sk-ant-oat-tok", false)
if got := req.Header.Get("anthropic-beta"); got != "oauth-2025-04-20" {
t.Errorf("anthropic-beta = %q, want %q", got, "oauth-2025-04-20")
}
}
internal/ratelimit/tracker_test.go
+278
View File
@@ -0,0 +1,278 @@
package ratelimit
import (
"net/http"
"testing"
"time"
)
func TestNewTracker(t *testing.T) {
called := false
tr := NewTracker(func() string {
called = true
return "tok"
})
if tr == nil {
t.Fatal("NewTracker returned nil")
}
// tokenFn stored but not called during construction
if called {
t.Error("tokenFn should not be called by NewTracker")
}
// Invoke to verify it's wired
if got := tr.tokenFn(); got != "tok" {
t.Errorf("tokenFn() = %q, want tok", got)
}
}
func TestUpdateFromHeaders_Full(t *testing.T) {
tr := NewTracker(func() string { return "" })
h := http.Header{}
h.Set("Anthropic-Ratelimit-Unified-5h-Utilization", "0.42")
h.Set("Anthropic-Ratelimit-Unified-5h-Reset", "1700000000")
h.Set("Anthropic-Ratelimit-Unified-7d-Utilization", "0.75")
h.Set("Anthropic-Ratelimit-Unified-7d-Reset", "1700100000")
tr.UpdateFromHeaders(h)
fh := tr.FiveHour()
if fh.Utilization != 42.0 {
t.Errorf("FiveHour.Utilization = %f, want 42.0", fh.Utilization)
}
wantReset5h := time.Unix(1700000000, 0).UTC().Truncate(time.Minute)
if !fh.ResetsAt.Equal(wantReset5h) {
t.Errorf("FiveHour.ResetsAt = %v, want %v", fh.ResetsAt, wantReset5h)
}
sd := tr.SevenDay()
if sd.Utilization != 75.0 {
t.Errorf("SevenDay.Utilization = %f, want 75.0", sd.Utilization)
}
wantReset7d := time.Unix(1700100000, 0).UTC().Truncate(time.Minute)
if !sd.ResetsAt.Equal(wantReset7d) {
t.Errorf("SevenDay.ResetsAt = %v, want %v", sd.ResetsAt, wantReset7d)
}
}
func TestUpdateFromHeaders_Partial(t *testing.T) {
tr := NewTracker(func() string { return "" })
// Only set 5h utilization, no reset, no 7d
h := http.Header{}
h.Set("Anthropic-Ratelimit-Unified-5h-Utilization", "0.33")
tr.UpdateFromHeaders(h)
fh := tr.FiveHour()
if fh.Utilization != 33.0 {
t.Errorf("FiveHour.Utilization = %f, want 33.0", fh.Utilization)
}
if !fh.ResetsAt.IsZero() {
t.Errorf("FiveHour.ResetsAt should be zero, got %v", fh.ResetsAt)
}
sd := tr.SevenDay()
if sd.Utilization != 0 {
t.Errorf("SevenDay.Utilization = %f, want 0", sd.Utilization)
}
}
func TestUpdateFromHeaders_Missing(t *testing.T) {
tr := NewTracker(func() string { return "" })
// Pre-set some state
tr.mu.Lock()
tr.fiveHour.Utilization = 50.0
tr.mu.Unlock()
// Update with empty headers — should not change state
tr.UpdateFromHeaders(http.Header{})
fh := tr.FiveHour()
if fh.Utilization != 50.0 {
t.Errorf("FiveHour.Utilization = %f, want 50.0 (unchanged)", fh.Utilization)
}
}
func TestUpdateFromHeaders_InvalidValues(t *testing.T) {
tr := NewTracker(func() string { return "" })
h := http.Header{}
h.Set("Anthropic-Ratelimit-Unified-5h-Utilization", "not-a-number")
h.Set("Anthropic-Ratelimit-Unified-5h-Reset", "not-a-timestamp")
tr.UpdateFromHeaders(h)
fh := tr.FiveHour()
if fh.Utilization != 0 {
t.Errorf("Utilization should stay 0 for invalid input, got %f", fh.Utilization)
}
if !fh.ResetsAt.IsZero() {
t.Errorf("ResetsAt should stay zero for invalid input, got %v", fh.ResetsAt)
}
}
func TestSonnet_Snapshot(t *testing.T) {
tr := NewTracker(func() string { return "" })
// Sonnet is only set via poll/updateWindow, not UpdateFromHeaders
// Verify it starts at zero
s := tr.Sonnet()
if s.Utilization != 0 {
t.Errorf("Sonnet.Utilization = %f, want 0", s.Utilization)
}
if !s.ResetsAt.IsZero() {
t.Errorf("Sonnet.ResetsAt should be zero, got %v", s.ResetsAt)
}
}
func TestExtra_Default(t *testing.T) {
tr := NewTracker(func() string { return "" })
extra := tr.Extra()
if extra.IsEnabled {
t.Error("Extra.IsEnabled should be false by default")
}
if extra.MonthlyLimit != nil {
t.Error("Extra.MonthlyLimit should be nil by default")
}
}
func TestUpdateWindow(t *testing.T) {
tr := NewTracker(func() string { return "" })
tests := []struct {
name string
util *float64
resetsAt *string
wantUtil float64
wantResetOK bool
}{
{
name: "both fields",
util: float64Ptr(65.5),
resetsAt: stringPtr("2024-01-15T10:30:45Z"),
wantUtil: 65.5,
wantResetOK: true,
},
{
name: "utilization only",
util: float64Ptr(30.0),
resetsAt: nil,
wantUtil: 30.0,
wantResetOK: false,
},
{
name: "reset only (RFC3339Nano)",
util: nil,
resetsAt: stringPtr("2024-06-01T12:00:00.123456789Z"),
wantUtil: 0,
wantResetOK: true,
},
{
name: "nil both",
util: nil,
resetsAt: nil,
wantUtil: 0,
wantResetOK: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
w := &Window{}
rl := &RateLimit{
Utilization: tt.util,
ResetsAt: tt.resetsAt,
}
tr.updateWindow(w, rl)
if w.Utilization != tt.wantUtil {
t.Errorf("Utilization = %f, want %f", w.Utilization, tt.wantUtil)
}
if tt.wantResetOK {
if w.ResetsAt.IsZero() {
t.Error("ResetsAt should be set")
}
// Verify truncation to minute
if w.ResetsAt.Second() != 0 || w.ResetsAt.Nanosecond() != 0 {
t.Errorf("ResetsAt not truncated to minute: %v", w.ResetsAt)
}
if w.ResetsAt.Location() != time.UTC {
t.Errorf("ResetsAt not in UTC: %v", w.ResetsAt.Location())
}
} else if tt.resetsAt == nil {
if !w.ResetsAt.IsZero() {
t.Errorf("ResetsAt should be zero when input is nil, got %v", w.ResetsAt)
}
}
})
}
}
func TestUpdateWindow_InvalidTime(t *testing.T) {
tr := NewTracker(func() string { return "" })
w := &Window{}
bad := "not-a-time"
rl := &RateLimit{ResetsAt: &bad}
tr.updateWindow(w, rl)
if !w.ResetsAt.IsZero() {
t.Errorf("ResetsAt should stay zero for invalid time, got %v", w.ResetsAt)
}
}
func TestPoll_SetsStateFromUsageResponse(t *testing.T) {
// White-box: directly set fields that poll would set after fetchUsage
tr := NewTracker(func() string { return "" })
// Simulate what poll does after fetching usage
tr.mu.Lock()
usage := &UsageResponse{
FiveHour: &RateLimit{Utilization: float64Ptr(55.5), ResetsAt: stringPtr("2024-03-01T08:00:00Z")},
SevenDay: &RateLimit{Utilization: float64Ptr(22.3), ResetsAt: stringPtr("2024-03-07T00:00:00Z")},
SevenDaySonnet: &RateLimit{Utilization: float64Ptr(10.0), ResetsAt: stringPtr("2024-03-07T00:00:00Z")},
ExtraUsage: &ExtraUsage{IsEnabled: true, MonthlyLimit: float64Ptr(100.0), UsedCredits: float64Ptr(42.5)},
}
if usage.FiveHour != nil {
tr.updateWindow(&tr.fiveHour, usage.FiveHour)
}
if usage.SevenDay != nil {
tr.updateWindow(&tr.sevenDay, usage.SevenDay)
}
if usage.SevenDaySonnet != nil {
tr.updateWindow(&tr.sonnet, usage.SevenDaySonnet)
}
if usage.ExtraUsage != nil {
tr.extra = *usage.ExtraUsage
}
tr.mu.Unlock()
fh := tr.FiveHour()
if fh.Utilization != 55.5 {
t.Errorf("FiveHour.Utilization = %f, want 55.5", fh.Utilization)
}
sd := tr.SevenDay()
if sd.Utilization != 22.3 {
t.Errorf("SevenDay.Utilization = %f, want 22.3", sd.Utilization)
}
sn := tr.Sonnet()
if sn.Utilization != 10.0 {
t.Errorf("Sonnet.Utilization = %f, want 10.0", sn.Utilization)
}
extra := tr.Extra()
if !extra.IsEnabled {
t.Error("Extra.IsEnabled = false, want true")
}
if extra.MonthlyLimit == nil || *extra.MonthlyLimit != 100.0 {
t.Errorf("Extra.MonthlyLimit = %v, want 100.0", extra.MonthlyLimit)
}
if extra.UsedCredits == nil || *extra.UsedCredits != 42.5 {
t.Errorf("Extra.UsedCredits = %v, want 42.5", extra.UsedCredits)
}
}
func float64Ptr(f float64) *float64 { return &f }
func stringPtr(s string) *string { return &s }
internal/ratelimit/usage.go
+7 -2
View File
@@ -7,8 +7,13 @@ import (
"io"
"net/http"
"time"
"github.com/fujin/anthropic-proxy/internal/transport"
"github.com/fujin/anthropic-proxy/internal/version"
)
var usageClient = transport.NewHTTPClient(10 * time.Second)
const usageURL = "https://api.anthropic.com/api/oauth/usage"
type RateLimit struct {
@@ -41,9 +46,9 @@ func fetchUsage(ctx context.Context, token string) (*UsageResponse, error) {
req.Header.Set("Authorization", "Bearer "+token)
req.Header.Set("Content-Type", "application/json")
req.Header.Set("anthropic-beta", "oauth-2025-04-20")
req.Header.Set("User-Agent", "claude-cli/2.1.92")
req.Header.Set("User-Agent", "claude-cli/"+version.ClaudeCodeFallback)
resp, err := http.DefaultClient.Do(req)
resp, err := usageClient.Do(req)
if err != nil {
return nil, fmt.Errorf("request: %w", err)
}
internal/ratelimit/usage_test.go
+241
View File
@@ -0,0 +1,241 @@
package ratelimit
import (
"context"
"encoding/json"
"net/http"
"net/http/httptest"
"strings"
"testing"
)
func TestUsageResponse_FullJSON(t *testing.T) {
raw := `{
"five_hour": {"utilization": 42.5, "resets_at": "2024-01-15T10:30:00Z"},
"seven_day": {"utilization": 75.0, "resets_at": "2024-01-20T00:00:00Z"},
"seven_day_sonnet": {"utilization": 10.0, "resets_at": "2024-01-20T00:00:00Z"},
"extra_usage": {
"is_enabled": true,
"monthly_limit": 100.0,
"used_credits": 42.5,
"utilization": 42.5
}
}`
var resp UsageResponse
if err := json.Unmarshal([]byte(raw), &resp); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if resp.FiveHour == nil {
t.Fatal("FiveHour is nil")
}
if resp.FiveHour.Utilization == nil || *resp.FiveHour.Utilization != 42.5 {
t.Errorf("FiveHour.Utilization = %v, want 42.5", resp.FiveHour.Utilization)
}
if resp.FiveHour.ResetsAt == nil || *resp.FiveHour.ResetsAt != "2024-01-15T10:30:00Z" {
t.Errorf("FiveHour.ResetsAt = %v", resp.FiveHour.ResetsAt)
}
if resp.SevenDay == nil {
t.Fatal("SevenDay is nil")
}
if resp.SevenDay.Utilization == nil || *resp.SevenDay.Utilization != 75.0 {
t.Errorf("SevenDay.Utilization = %v, want 75.0", resp.SevenDay.Utilization)
}
if resp.SevenDaySonnet == nil {
t.Fatal("SevenDaySonnet is nil")
}
if resp.SevenDaySonnet.Utilization == nil || *resp.SevenDaySonnet.Utilization != 10.0 {
t.Errorf("SevenDaySonnet.Utilization = %v", resp.SevenDaySonnet.Utilization)
}
if resp.ExtraUsage == nil {
t.Fatal("ExtraUsage is nil")
}
if !resp.ExtraUsage.IsEnabled {
t.Error("ExtraUsage.IsEnabled = false, want true")
}
if resp.ExtraUsage.MonthlyLimit == nil || *resp.ExtraUsage.MonthlyLimit != 100.0 {
t.Errorf("ExtraUsage.MonthlyLimit = %v, want 100.0", resp.ExtraUsage.MonthlyLimit)
}
if resp.ExtraUsage.UsedCredits == nil || *resp.ExtraUsage.UsedCredits != 42.5 {
t.Errorf("ExtraUsage.UsedCredits = %v, want 42.5", resp.ExtraUsage.UsedCredits)
}
if resp.ExtraUsage.Utilization == nil || *resp.ExtraUsage.Utilization != 42.5 {
t.Errorf("ExtraUsage.Utilization = %v, want 42.5", resp.ExtraUsage.Utilization)
}
}
func TestUsageResponse_PartialJSON(t *testing.T) {
raw := `{"five_hour": {"utilization": 10.0}}`
var resp UsageResponse
if err := json.Unmarshal([]byte(raw), &resp); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if resp.FiveHour == nil {
t.Fatal("FiveHour is nil")
}
if resp.FiveHour.Utilization == nil || *resp.FiveHour.Utilization != 10.0 {
t.Errorf("FiveHour.Utilization = %v, want 10.0", resp.FiveHour.Utilization)
}
if resp.FiveHour.ResetsAt != nil {
t.Errorf("FiveHour.ResetsAt should be nil, got %v", resp.FiveHour.ResetsAt)
}
if resp.SevenDay != nil {
t.Errorf("SevenDay should be nil, got %v", resp.SevenDay)
}
if resp.SevenDaySonnet != nil {
t.Errorf("SevenDaySonnet should be nil, got %v", resp.SevenDaySonnet)
}
if resp.ExtraUsage != nil {
t.Errorf("ExtraUsage should be nil, got %v", resp.ExtraUsage)
}
}
func TestUsageResponse_EmptyJSON(t *testing.T) {
var resp UsageResponse
if err := json.Unmarshal([]byte(`{}`), &resp); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if resp.FiveHour != nil || resp.SevenDay != nil || resp.SevenDaySonnet != nil || resp.ExtraUsage != nil {
t.Error("all fields should be nil for empty JSON")
}
}
func TestFetchUsage_Success(t *testing.T) {
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// Verify request headers
if got := r.Header.Get("Authorization"); got != "Bearer test-token" {
t.Errorf("Authorization = %q, want 'Bearer test-token'", got)
}
if got := r.Header.Get("Content-Type"); got != "application/json" {
t.Errorf("Content-Type = %q, want application/json", got)
}
if got := r.Header.Get("anthropic-beta"); got != "oauth-2025-04-20" {
t.Errorf("anthropic-beta = %q, want oauth-2025-04-20", got)
}
if got := r.Header.Get("User-Agent"); got != "claude-cli/2.1.92" {
t.Errorf("User-Agent = %q, want claude-cli/2.1.92", got)
}
if r.Method != http.MethodGet {
t.Errorf("Method = %q, want GET", r.Method)
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
_, _ = w.Write([]byte(`{
"five_hour": {"utilization": 50.0, "resets_at": "2024-01-15T10:00:00Z"},
"seven_day": {"utilization": 25.0, "resets_at": "2024-01-20T00:00:00Z"}
}`))
}))
defer srv.Close()
// fetchUsage hardcodes usageURL, but we can test via the mock by temporarily
// using http.DefaultClient's transport. Instead, we test the handler directly.
// The httptest server validates our request expectations above.
// Make a real request to the test server to verify handler behavior
req, _ := http.NewRequestWithContext(context.Background(), http.MethodGet, srv.URL, nil)
req.Header.Set("Authorization", "Bearer test-token")
req.Header.Set("Content-Type", "application/json")
req.Header.Set("anthropic-beta", "oauth-2025-04-20")
req.Header.Set("User-Agent", "claude-cli/2.1.92")
resp, err := http.DefaultClient.Do(req)
if err != nil {
t.Fatalf("request failed: %v", err)
}
defer resp.Body.Close()
var usage UsageResponse
if err := json.NewDecoder(resp.Body).Decode(&usage); err != nil {
t.Fatalf("decode: %v", err)
}
if usage.FiveHour == nil || *usage.FiveHour.Utilization != 50.0 {
t.Errorf("FiveHour.Utilization = %v, want 50.0", usage.FiveHour)
}
if usage.SevenDay == nil || *usage.SevenDay.Utilization != 25.0 {
t.Errorf("SevenDay.Utilization = %v, want 25.0", usage.SevenDay)
}
}
func TestFetchUsage_Non200(t *testing.T) {
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusForbidden)
_, _ = w.Write([]byte(`{"error":"forbidden"}`))
}))
defer srv.Close()
// Simulate the error path: non-200 returns error with status and body
resp, err := http.Get(srv.URL)
if err != nil {
t.Fatalf("request: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
t.Fatal("expected non-200 status")
}
// This matches the fetchUsage error format
body := make([]byte, 1024)
n, _ := resp.Body.Read(body)
bodyStr := string(body[:n])
if !strings.Contains(bodyStr, "forbidden") {
t.Errorf("body = %q, want it to contain 'forbidden'", bodyStr)
}
}
func TestFetchUsage_MalformedJSON(t *testing.T) {
raw := `{not valid json`
var resp UsageResponse
err := json.Unmarshal([]byte(raw), &resp)
if err == nil {
t.Fatal("expected decode error for malformed JSON")
}
}
func TestRateLimit_NilFields(t *testing.T) {
raw := `{}`
var rl RateLimit
if err := json.Unmarshal([]byte(raw), &rl); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if rl.Utilization != nil {
t.Errorf("Utilization should be nil, got %v", rl.Utilization)
}
if rl.ResetsAt != nil {
t.Errorf("ResetsAt should be nil, got %v", rl.ResetsAt)
}
}
func TestExtraUsage_JSON(t *testing.T) {
raw := `{"is_enabled":false,"monthly_limit":null,"used_credits":null,"utilization":null}`
var eu ExtraUsage
if err := json.Unmarshal([]byte(raw), &eu); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if eu.IsEnabled {
t.Error("IsEnabled should be false")
}
if eu.MonthlyLimit != nil {
t.Error("MonthlyLimit should be nil")
}
if eu.UsedCredits != nil {
t.Error("UsedCredits should be nil")
}
if eu.Utilization != nil {
t.Error("Utilization should be nil")
}
}
func TestUsageURL_Constant(t *testing.T) {
if usageURL != "https://api.anthropic.com/api/oauth/usage" {
t.Errorf("usageURL = %q, want https://api.anthropic.com/api/oauth/usage", usageURL)
}
}
internal/server/server.go
+14 -4
View File
@@ -26,7 +26,7 @@ type Server struct {
apiKeys atomic.Pointer[map[string]struct{}]
}
func New(cfg *config.Config, pool *auth.Pool, profile *proxy.SniffedProfile, tracker *ratelimit.Tracker) *Server {
func New(cfg *config.Config, pool *auth.Pool, profile *proxy.SniffedProfile, tracker *ratelimit.Tracker, metricsHandler http.Handler) *Server {
s := &Server{configPath: "config.yaml"}
san := proxy.NewSanitizer(cfg.Sanitize)
@@ -39,7 +39,7 @@ func New(cfg *config.Config, pool *auth.Pool, profile *proxy.SniffedProfile, tra
engine := gin.New()
engine.Use(gin.Recovery())
engine.Use(corsMiddleware())
if cfg.Telemetry.ExportEnabled() {
if cfg.Telemetry.Export.Enabled() {
engine.Use(otelgin.Middleware(cfg.Telemetry.ServiceName))
}
engine.Use(s.authMiddleware())
@@ -51,6 +51,10 @@ func New(cfg *config.Config, pool *auth.Pool, profile *proxy.SniffedProfile, tra
engine.POST("/v1/messages", handler)
engine.POST("/messages", handler)
if metricsHandler != nil {
engine.GET("/metrics", gin.WrapH(metricsHandler))
}
engine.POST("/reload", s.handleReload())
engine.POST("/debug/refresh", handleDebugRefresh(pool))
engine.GET("/healthz", func(c *gin.Context) {
@@ -134,10 +138,16 @@ func corsMiddleware() gin.HandlerFunc {
}
}
// authBypassPaths lists endpoints that do not require API key authentication.
var authBypassPaths = map[string]bool{
"/healthz": true,
"/reload": true,
"/metrics": true,
}
func (s *Server) authMiddleware() gin.HandlerFunc {
return func(c *gin.Context) {
path := c.Request.URL.Path
if path == "/healthz" || path == "/reload" {
if authBypassPaths[c.Request.URL.Path] {
c.Next()
return
}
internal/server/server_test.go
+529
View File
@@ -0,0 +1,529 @@
package server
import (
"encoding/json"
"net/http"
"net/http/httptest"
"os"
"sync/atomic"
"testing"
"github.com/gin-gonic/gin"
)
func init() {
gin.SetMode(gin.TestMode)
}
// --- makeKeySet ---
func TestMakeKeySet(t *testing.T) {
tests := []struct {
name string
keys []string
wantN int
lookup string
found bool
}{
{
name: "nil slice returns empty map",
keys: nil,
wantN: 0,
},
{
name: "empty slice returns empty map",
keys: []string{},
wantN: 0,
},
{
name: "single key",
keys: []string{"key1"},
wantN: 1,
lookup: "key1",
found: true,
},
{
name: "multiple keys",
keys: []string{"a", "b", "c"},
wantN: 3,
lookup: "b",
found: true,
},
{
name: "missing key not found",
keys: []string{"a", "b"},
wantN: 2,
lookup: "c",
found: false,
},
{
name: "duplicate keys deduped",
keys: []string{"x", "x", "x"},
wantN: 1,
lookup: "x",
found: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := makeKeySet(tt.keys)
if len(got) != tt.wantN {
t.Errorf("len(makeKeySet) = %d, want %d", len(got), tt.wantN)
}
if tt.lookup != "" {
_, ok := got[tt.lookup]
if ok != tt.found {
t.Errorf("keySet[%q] found=%v, want %v", tt.lookup, ok, tt.found)
}
}
})
}
}
// --- corsMiddleware ---
func TestCorsMiddleware_SetsHeaders(t *testing.T) {
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodGet, "/", nil)
handler := corsMiddleware()
handler(c)
if got := w.Header().Get("Access-Control-Allow-Origin"); got != "*" {
t.Errorf("Access-Control-Allow-Origin = %q, want %q", got, "*")
}
if got := w.Header().Get("Access-Control-Allow-Methods"); got != "GET, POST, PUT, DELETE, OPTIONS" {
t.Errorf("Access-Control-Allow-Methods = %q, want %q", got, "GET, POST, PUT, DELETE, OPTIONS")
}
allowHeaders := w.Header().Get("Access-Control-Allow-Headers")
for _, h := range []string{"x-api-key", "anthropic-version", "anthropic-beta", "Authorization", "Content-Type", "Origin"} {
if !containsSubstring(allowHeaders, h) {
t.Errorf("Access-Control-Allow-Headers %q missing %q", allowHeaders, h)
}
}
}
func TestCorsMiddleware_OptionsReturns204(t *testing.T) {
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodOptions, "/v1/messages", nil)
handler := corsMiddleware()
handler(c)
if w.Code != http.StatusNoContent {
t.Errorf("OPTIONS status = %d, want %d", w.Code, http.StatusNoContent)
}
if !c.IsAborted() {
t.Error("expected context to be aborted on OPTIONS")
}
}
func TestCorsMiddleware_NonOptionsDoesNotAbort(t *testing.T) {
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
handler := corsMiddleware()
handler(c)
if c.IsAborted() {
t.Error("POST request should not be aborted")
}
}
// --- authMiddleware ---
func newServerWithKeys(keys []string) *Server {
s := &Server{}
keySet := makeKeySet(keys)
s.apiKeys.Store(&keySet)
return s
}
func TestAuthMiddleware_BypassPaths(t *testing.T) {
paths := []string{"/healthz", "/reload", "/metrics"}
s := newServerWithKeys(nil) // no keys — would reject if auth checked
for _, path := range paths {
t.Run(path, func(t *testing.T) {
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodGet, path, nil)
handler := s.authMiddleware()
handler(c)
if c.IsAborted() {
t.Errorf("path %q should bypass auth but was aborted", path)
}
})
}
}
func TestAuthMiddleware_MissingToken_401(t *testing.T) {
s := newServerWithKeys([]string{"valid-key"})
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
handler := s.authMiddleware()
handler(c)
if w.Code != http.StatusUnauthorized {
t.Errorf("status = %d, want %d", w.Code, http.StatusUnauthorized)
}
if !c.IsAborted() {
t.Error("expected aborted on missing token")
}
var body map[string]string
if err := json.Unmarshal(w.Body.Bytes(), &body); err != nil {
t.Fatalf("failed to unmarshal response: %v", err)
}
if body["error"] != "missing authentication" {
t.Errorf("error = %q, want %q", body["error"], "missing authentication")
}
}
func TestAuthMiddleware_InvalidKey_403(t *testing.T) {
s := newServerWithKeys([]string{"valid-key"})
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
c.Request.Header.Set("x-api-key", "wrong-key")
handler := s.authMiddleware()
handler(c)
if w.Code != http.StatusForbidden {
t.Errorf("status = %d, want %d", w.Code, http.StatusForbidden)
}
if !c.IsAborted() {
t.Error("expected aborted on invalid key")
}
var body map[string]string
if err := json.Unmarshal(w.Body.Bytes(), &body); err != nil {
t.Fatalf("failed to unmarshal response: %v", err)
}
if body["error"] != "invalid api key" {
t.Errorf("error = %q, want %q", body["error"], "invalid api key")
}
}
func TestAuthMiddleware_ValidKey_XApiKey(t *testing.T) {
s := newServerWithKeys([]string{"valid-key"})
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
c.Request.Header.Set("x-api-key", "valid-key")
handler := s.authMiddleware()
handler(c)
if c.IsAborted() {
t.Error("valid key should not abort")
}
if w.Code == http.StatusUnauthorized || w.Code == http.StatusForbidden {
t.Errorf("unexpected status %d for valid key", w.Code)
}
}
func TestAuthMiddleware_ValidKey_BearerAuth(t *testing.T) {
s := newServerWithKeys([]string{"my-token"})
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
c.Request.Header.Set("Authorization", "Bearer my-token")
handler := s.authMiddleware()
handler(c)
if c.IsAborted() {
t.Error("valid Bearer token should not abort")
}
}
func TestAuthMiddleware_BearerPrefix_Stripped(t *testing.T) {
// The token is "my-token", sent as "Bearer my-token". The middleware should
// strip "Bearer " and compare "my-token" against the key set.
s := newServerWithKeys([]string{"my-token"})
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
c.Request.Header.Set("Authorization", "Bearer my-token")
handler := s.authMiddleware()
handler(c)
if c.IsAborted() {
t.Error("expected auth to pass with Bearer-prefixed valid key")
}
}
func TestAuthMiddleware_AuthorizationWithoutBearer(t *testing.T) {
// If Authorization header doesn't have Bearer prefix, TrimPrefix is a no-op,
// so the full header value is used as the token.
s := newServerWithKeys([]string{"raw-token-value"})
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
c.Request.Header.Set("Authorization", "raw-token-value")
handler := s.authMiddleware()
handler(c)
if c.IsAborted() {
t.Error("raw Authorization value matching a key should pass")
}
}
func TestAuthMiddleware_XApiKey_FallbackWhenNoAuthHeader(t *testing.T) {
// If Authorization is empty, x-api-key is checked.
s := newServerWithKeys([]string{"fallback-key"})
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
c.Request.Header.Set("x-api-key", "fallback-key")
handler := s.authMiddleware()
handler(c)
if c.IsAborted() {
t.Error("x-api-key fallback should pass")
}
}
func TestAuthMiddleware_AuthorizationPreferredOverXApiKey(t *testing.T) {
// Both headers set; Authorization takes precedence.
s := newServerWithKeys([]string{"auth-key"})
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
c.Request.Header.Set("Authorization", "Bearer auth-key")
c.Request.Header.Set("x-api-key", "wrong-key")
handler := s.authMiddleware()
handler(c)
if c.IsAborted() {
t.Error("Authorization should take precedence over x-api-key")
}
}
// --- handleReload ---
func TestHandleReload_Success(t *testing.T) {
// Create a temp config file
tmpFile, err := os.CreateTemp("", "config-*.yaml")
if err != nil {
t.Fatalf("failed to create temp file: %v", err)
}
defer os.Remove(tmpFile.Name())
configContent := `
port: 9999
api_keys:
- reloaded-key-1
- reloaded-key-2
sanitize:
tools:
- from: old_tool
to: new_tool
system:
- match: foo
replace: bar
body:
- match: baz
replace: qux
`
if _, err := tmpFile.WriteString(configContent); err != nil {
t.Fatalf("failed to write config: %v", err)
}
tmpFile.Close()
s := &Server{configPath: tmpFile.Name()}
// Initialize with empty values
emptyKeys := makeKeySet(nil)
s.apiKeys.Store(&emptyKeys)
emptySan := &atomic.Pointer[interface{}]{}
_ = emptySan // just to show we're aware
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/reload", nil)
handler := s.handleReload()
handler(c)
if w.Code != http.StatusOK {
t.Fatalf("status = %d, want %d; body: %s", w.Code, http.StatusOK, w.Body.String())
}
var resp map[string]interface{}
if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
t.Fatalf("failed to unmarshal: %v", err)
}
if resp["status"] != "reloaded" {
t.Errorf("status = %v, want %q", resp["status"], "reloaded")
}
// Verify api keys were updated
keys := s.apiKeys.Load()
if _, ok := (*keys)["reloaded-key-1"]; !ok {
t.Error("expected reloaded-key-1 in api keys after reload")
}
if _, ok := (*keys)["reloaded-key-2"]; !ok {
t.Error("expected reloaded-key-2 in api keys after reload")
}
if len(*keys) != 2 {
t.Errorf("expected 2 api keys, got %d", len(*keys))
}
// Verify sanitizer was updated
san := s.sanitizer.Load()
if san == nil {
t.Fatal("sanitizer is nil after reload")
}
// Check tool_renames in response
if toolRenames, ok := resp["tool_renames"].(float64); !ok || int(toolRenames) != 1 {
t.Errorf("tool_renames = %v, want 1", resp["tool_renames"])
}
if apiKeys, ok := resp["api_keys"].(float64); !ok || int(apiKeys) != 2 {
t.Errorf("api_keys = %v, want 2", resp["api_keys"])
}
}
func TestHandleReload_InvalidConfig(t *testing.T) {
s := &Server{configPath: "/nonexistent/path/config.yaml"}
emptyKeys := makeKeySet(nil)
s.apiKeys.Store(&emptyKeys)
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
c.Request = httptest.NewRequest(http.MethodPost, "/reload", nil)
handler := s.handleReload()
handler(c)
if w.Code != http.StatusInternalServerError {
t.Errorf("status = %d, want %d", w.Code, http.StatusInternalServerError)
}
var resp map[string]string
if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
t.Fatalf("failed to unmarshal: %v", err)
}
if resp["error"] == "" {
t.Error("expected non-empty error message")
}
}
// --- Full route tests using httptest ---
func TestHealthzEndpoint(t *testing.T) {
engine := gin.New()
engine.Use(corsMiddleware())
s := newServerWithKeys(nil)
engine.Use(s.authMiddleware())
engine.GET("/healthz", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{"status": "ok"})
})
req := httptest.NewRequest(http.MethodGet, "/healthz", nil)
w := httptest.NewRecorder()
engine.ServeHTTP(w, req)
if w.Code != http.StatusOK {
t.Errorf("status = %d, want %d", w.Code, http.StatusOK)
}
var body map[string]string
if err := json.Unmarshal(w.Body.Bytes(), &body); err != nil {
t.Fatalf("unmarshal: %v", err)
}
if body["status"] != "ok" {
t.Errorf("status = %q, want %q", body["status"], "ok")
}
}
func TestAuthMiddleware_FullRoute_Rejected(t *testing.T) {
engine := gin.New()
s := newServerWithKeys([]string{"correct-key"})
engine.Use(s.authMiddleware())
engine.POST("/v1/messages", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{"ok": true})
})
// No auth header
req := httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
w := httptest.NewRecorder()
engine.ServeHTTP(w, req)
if w.Code != http.StatusUnauthorized {
t.Errorf("status = %d, want %d", w.Code, http.StatusUnauthorized)
}
}
func TestAuthMiddleware_FullRoute_Accepted(t *testing.T) {
engine := gin.New()
s := newServerWithKeys([]string{"correct-key"})
engine.Use(s.authMiddleware())
engine.POST("/v1/messages", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{"ok": true})
})
req := httptest.NewRequest(http.MethodPost, "/v1/messages", nil)
req.Header.Set("x-api-key", "correct-key")
w := httptest.NewRecorder()
engine.ServeHTTP(w, req)
if w.Code != http.StatusOK {
t.Errorf("status = %d, want %d", w.Code, http.StatusOK)
}
}
func TestCorsMiddleware_FullRoute_OptionsRequest(t *testing.T) {
engine := gin.New()
engine.Use(corsMiddleware())
s := newServerWithKeys([]string{"key"})
engine.Use(s.authMiddleware())
engine.POST("/v1/messages", func(c *gin.Context) {
c.JSON(http.StatusOK, gin.H{"ok": true})
})
req := httptest.NewRequest(http.MethodOptions, "/v1/messages", nil)
w := httptest.NewRecorder()
engine.ServeHTTP(w, req)
if w.Code != http.StatusNoContent {
t.Errorf("status = %d, want %d", w.Code, http.StatusNoContent)
}
if got := w.Header().Get("Access-Control-Allow-Origin"); got != "*" {
t.Errorf("ACAO = %q, want %q", got, "*")
}
}
// helper
func containsSubstring(s, sub string) bool {
return len(s) >= len(sub) && (s == sub || len(s) > 0 && containsStr(s, sub))
}
func containsStr(s, sub string) bool {
for i := 0; i <= len(s)-len(sub); i++ {
if s[i:i+len(sub)] == sub {
return true
}
}
return false
}
internal/telemetry/logbridge_test.go
+178
View File
@@ -0,0 +1,178 @@
package telemetry
import (
"encoding/json"
"testing"
otellog "go.opentelemetry.io/otel/log"
sdklog "go.opentelemetry.io/otel/sdk/log"
)
func TestMapSeverity(t *testing.T) {
tests := []struct {
input string
want otellog.Severity
}{
{"trace", otellog.SeverityTrace},
{"debug", otellog.SeverityDebug},
{"info", otellog.SeverityInfo},
{"warn", otellog.SeverityWarn},
{"warning", otellog.SeverityWarn},
{"error", otellog.SeverityError},
{"fatal", otellog.SeverityFatal},
{"panic", otellog.SeverityFatal2},
{"unknown", otellog.SeverityInfo},
{"", otellog.SeverityInfo},
{"INFO", otellog.SeverityInfo}, // uppercase falls to default
{"PANIC", otellog.SeverityInfo}, // uppercase falls to default
{"gibberish", otellog.SeverityInfo},
}
for _, tc := range tests {
t.Run("level_"+tc.input, func(t *testing.T) {
got := mapSeverity(tc.input)
if got != tc.want {
t.Errorf("mapSeverity(%q) = %v, want %v", tc.input, got, tc.want)
}
})
}
}
func newTestBridge(t *testing.T) *LogBridge {
t.Helper()
provider := sdklog.NewLoggerProvider()
t.Cleanup(func() {
_ = provider.Shutdown(t.Context())
})
return &LogBridge{provider: provider}
}
func TestLogBridgeWrite(t *testing.T) {
tests := []struct {
name string
input interface{} // will be marshaled to JSON; use string for raw input
raw string // if non-empty, use this directly instead of marshaling input
}{
{
name: "valid_json_with_message_level_and_extras",
input: map[string]interface{}{
"message": "request handled",
"level": "info",
"method": "GET",
"status": float64(200),
},
},
{
name: "message_only_no_level",
input: map[string]interface{}{
"message": "hello world",
},
},
{
name: "level_only_no_message",
input: map[string]interface{}{
"level": "error",
},
},
{
name: "empty_json_object",
input: map[string]interface{}{},
},
{
name: "string_float64_bool_attributes",
input: map[string]interface{}{
"message": "test",
"level": "debug",
"str_val": "hello",
"num_val": float64(3.14),
"bool_val": true,
},
},
{
name: "complex_nested_object_attribute",
input: map[string]interface{}{
"message": "nested",
"level": "warn",
"nested": map[string]interface{}{"foo": "bar", "n": float64(1)},
},
},
{
name: "time_field_skipped_in_attributes",
input: map[string]interface{}{
"message": "with time",
"level": "info",
"time": "2025-01-01T00:00:00Z",
"extra": "kept",
},
},
{
name: "malformed_json",
raw: "this is not json at all",
},
{
name: "malformed_json_partial",
raw: `{"broken":`,
},
{
name: "array_attribute_marshaled_as_string",
input: map[string]interface{}{
"message": "arrays",
"tags": []interface{}{"a", "b"},
},
},
{
name: "null_value_attribute",
input: map[string]interface{}{
"message": "nulls",
"val": nil,
},
},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
bridge := newTestBridge(t)
var p []byte
if tc.raw != "" {
p = []byte(tc.raw)
} else {
var err error
p, err = json.Marshal(tc.input)
if err != nil {
t.Fatalf("failed to marshal test input: %v", err)
}
}
n, err := bridge.Write(p)
if n != len(p) {
t.Errorf("Write() returned n=%d, want %d", n, len(p))
}
if err != nil {
t.Errorf("Write() returned err=%v, want nil", err)
}
})
}
}
func TestLogBridgeWriteAlwaysReturnsLenAndNil(t *testing.T) {
bridge := newTestBridge(t)
inputs := [][]byte{
[]byte(`{"message":"ok","level":"info"}`),
[]byte(`not json`),
[]byte(`{}`),
[]byte(``),
[]byte(`[]`),
}
for _, p := range inputs {
n, err := bridge.Write(p)
if n != len(p) {
t.Errorf("Write(%q) n=%d, want %d", string(p), n, len(p))
}
if err != nil {
t.Errorf("Write(%q) err=%v, want nil", string(p), err)
}
}
}
internal/telemetry/telemetry.go
+31 -27
View File
@@ -3,13 +3,16 @@ package telemetry
import (
"context"
"io"
"net/http"
"github.com/fujin/anthropic-proxy/internal/config"
"github.com/fujin/anthropic-proxy/internal/ratelimit"
"github.com/prometheus/client_golang/prometheus/promhttp"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
promexporter "go.opentelemetry.io/otel/exporters/prometheus"
otellog "go.opentelemetry.io/otel/log/global"
"go.opentelemetry.io/otel/sdk/log"
sdkmetric "go.opentelemetry.io/otel/sdk/metric"
@@ -18,46 +21,51 @@ import (
semconv "go.opentelemetry.io/otel/semconv/v1.26.0"
)
// Setup initializes OpenTelemetry providers. It always creates a MeterProvider
// so metrics can be recorded in-process. When cfg.ExportEnabled(), OTLP gRPC
// exporters are additionally configured to push to the LGTM stack.
// Returns a shutdown function and an optional io.Writer for the log bridge.
func Setup(ctx context.Context, cfg config.TelemetryConfig, tracker *ratelimit.Tracker) (shutdown func(context.Context) error, logWriter io.Writer, err error) {
func Setup(ctx context.Context, cfg config.TelemetryConfig, tracker *ratelimit.Tracker) (shutdown func(context.Context) error, logWriter io.Writer, metricsHandler http.Handler, err error) {
res, err := resource.New(ctx,
resource.WithAttributes(
semconv.ServiceName(cfg.ServiceName),
),
)
if err != nil {
return nil, nil, err
return nil, nil, nil, err
}
if !cfg.ExportEnabled() {
// No export — set up in-memory meter provider only so metric
// instruments are valid (they just don't export anywhere).
mp := sdkmetric.NewMeterProvider(sdkmetric.WithResource(res))
var readers []sdkmetric.Option
readers = append(readers, sdkmetric.WithResource(res))
var promHandler http.Handler
if cfg.Embedded.Enabled {
exporter, pErr := promexporter.New()
if pErr != nil {
return nil, nil, nil, pErr
}
readers = append(readers, sdkmetric.WithReader(exporter))
promHandler = promhttp.Handler()
}
if !cfg.Export.Enabled() {
mp := sdkmetric.NewMeterProvider(readers...)
otel.SetMeterProvider(mp)
InitMetrics(mp.Meter(cfg.ServiceName), tracker)
return func(ctx context.Context) error { return mp.Shutdown(ctx) }, nil, nil
return func(ctx context.Context) error { return mp.Shutdown(ctx) }, nil, promHandler, nil
}
// Build exporter options
traceOpts := []otlptracegrpc.Option{otlptracegrpc.WithEndpoint(cfg.Endpoint)}
traceOpts := []otlptracegrpc.Option{otlptracegrpc.WithEndpoint(cfg.Export.Endpoint)}
metricOpts := []otlpmetricgrpc.Option{
otlpmetricgrpc.WithEndpoint(cfg.Endpoint),
otlpmetricgrpc.WithEndpoint(cfg.Export.Endpoint),
otlpmetricgrpc.WithTemporalitySelector(sdkmetric.CumulativeTemporalitySelector),
}
logOpts := []otlploggrpc.Option{otlploggrpc.WithEndpoint(cfg.Endpoint)}
if cfg.Insecure {
logOpts := []otlploggrpc.Option{otlploggrpc.WithEndpoint(cfg.Export.Endpoint)}
if cfg.Export.Insecure {
traceOpts = append(traceOpts, otlptracegrpc.WithInsecure())
metricOpts = append(metricOpts, otlpmetricgrpc.WithInsecure())
logOpts = append(logOpts, otlploggrpc.WithInsecure())
}
// Trace exporter
traceExp, err := otlptracegrpc.New(ctx, traceOpts...)
if err != nil {
return nil, nil, err
return nil, nil, nil, err
}
tp := trace.NewTracerProvider(
trace.WithBatcher(traceExp),
@@ -65,22 +73,18 @@ func Setup(ctx context.Context, cfg config.TelemetryConfig, tracker *ratelimit.T
)
otel.SetTracerProvider(tp)
// Metric exporter
metricExp, err := otlpmetricgrpc.New(ctx, metricOpts...)
if err != nil {
return nil, nil, err
return nil, nil, nil, err
}
mp := sdkmetric.NewMeterProvider(
sdkmetric.WithReader(sdkmetric.NewPeriodicReader(metricExp)),
sdkmetric.WithResource(res),
)
readers = append(readers, sdkmetric.WithReader(sdkmetric.NewPeriodicReader(metricExp)))
mp := sdkmetric.NewMeterProvider(readers...)
otel.SetMeterProvider(mp)
InitMetrics(mp.Meter(cfg.ServiceName), tracker)
// Log exporter
logExp, err := otlploggrpc.New(ctx, logOpts...)
if err != nil {
return nil, nil, err
return nil, nil, nil, err
}
lp := log.NewLoggerProvider(
log.WithProcessor(log.NewBatchProcessor(logExp)),
@@ -104,5 +108,5 @@ func Setup(ctx context.Context, cfg config.TelemetryConfig, tracker *ratelimit.T
return firstErr
}
return shutdownFn, bridge, nil
return shutdownFn, bridge, promHandler, nil
}
internal/proxy/transport.go → internal/transport/utls.go
+28 -10
View File
@@ -1,29 +1,47 @@
package proxy
// Package transport provides a shared uTLS HTTP/2 round-tripper with Chrome
// TLS fingerprinting and per-host connection pooling. Used by both the upstream
// proxy client and the OAuth token refresh client.
package transport
import (
"net"
"net/http"
"sync"
"time"
tls "github.com/refraction-networking/utls"
"github.com/rs/zerolog/log"
"golang.org/x/net/http2"
)
type utlsRoundTripper struct {
// UTLS implements http.RoundTripper using uTLS (Chrome fingerprint) over HTTP/2.
// It maintains a per-host connection pool with coordination for concurrent
// requests to the same host.
type UTLS struct {
mu sync.Mutex
connections map[string]*http2.ClientConn
pending map[string]*sync.Cond
dialTimeout time.Duration
}
func newUtlsRoundTripper() *utlsRoundTripper {
return &utlsRoundTripper{
// NewUTLS creates a uTLS HTTP/2 round-tripper with a 10-second dial timeout.
func NewUTLS() *UTLS {
return &UTLS{
connections: make(map[string]*http2.ClientConn),
pending: make(map[string]*sync.Cond),
dialTimeout: 10 * time.Second,
}
}
func (t *utlsRoundTripper) getOrCreateConnection(host, addr string) (*http2.ClientConn, error) {
// NewHTTPClient returns an http.Client using uTLS transport with the given
// request timeout. Pass 0 for no timeout (streaming).
func NewHTTPClient(timeout time.Duration) *http.Client {
return &http.Client{
Timeout: timeout,
Transport: NewUTLS(),
}
}
func (t *UTLS) getOrCreateConnection(host, addr string) (*http2.ClientConn, error) {
t.mu.Lock()
if h2Conn, ok := t.connections[host]; ok && h2Conn.CanTakeNewRequest() {
@@ -59,8 +77,8 @@ func (t *utlsRoundTripper) getOrCreateConnection(host, addr string) (*http2.Clie
return h2Conn, nil
}
func (t *utlsRoundTripper) createConnection(host, addr string) (*http2.ClientConn, error) {
conn, err := net.Dial("tcp", addr)
func (t *UTLS) createConnection(host, addr string) (*http2.ClientConn, error) {
conn, err := net.DialTimeout("tcp", addr, t.dialTimeout)
if err != nil {
return nil, err
}
@@ -83,14 +101,14 @@ func (t *utlsRoundTripper) createConnection(host, addr string) (*http2.ClientCon
return h2Conn, nil
}
func (t *utlsRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
// RoundTrip implements http.RoundTripper with uTLS Chrome fingerprinting.
func (t *UTLS) RoundTrip(req *http.Request) (*http.Response, error) {
hostname := req.URL.Hostname()
port := req.URL.Port()
if port == "" {
port = "443"
}
addr := net.JoinHostPort(hostname, port)
log.Debug().Str("addr", addr).Msg("uTLS round trip")
h2Conn, err := t.getOrCreateConnection(hostname, addr)
if err != nil {
internal/transport/utls_test.go
+78
View File
@@ -0,0 +1,78 @@
package transport
import (
"net/http"
"testing"
"time"
)
func TestNewUTLS(t *testing.T) {
tr := NewUTLS()
if tr == nil {
t.Fatal("NewUTLS returned nil")
}
if tr.connections == nil {
t.Error("connections map is nil")
}
if tr.pending == nil {
t.Error("pending map is nil")
}
if tr.dialTimeout != 10*time.Second {
t.Errorf("dialTimeout = %v, want 10s", tr.dialTimeout)
}
}
func TestNewHTTPClient(t *testing.T) {
tests := []struct {
name string
timeout time.Duration
}{
{"zero timeout (streaming)", 0},
{"15s timeout", 15 * time.Second},
{"30s timeout", 30 * time.Second},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c := NewHTTPClient(tt.timeout)
if c == nil {
t.Fatal("NewHTTPClient returned nil")
}
if c.Timeout != tt.timeout {
t.Errorf("Timeout = %v, want %v", c.Timeout, tt.timeout)
}
if c.Transport == nil {
t.Error("Transport is nil")
}
if _, ok := c.Transport.(*UTLS); !ok {
t.Errorf("Transport type = %T, want *UTLS", c.Transport)
}
})
}
}
func TestUTLS_ImplementsRoundTripper(t *testing.T) {
var _ http.RoundTripper = (*UTLS)(nil)
}
func TestUTLS_RoundTrip_InvalidHost(t *testing.T) {
tr := NewUTLS()
// Use a non-routable address to test dial timeout behavior
req, err := http.NewRequest("GET", "https://192.0.2.1:443/test", nil)
if err != nil {
t.Fatalf("NewRequest: %v", err)
}
_, err = tr.RoundTrip(req)
if err == nil {
t.Error("expected error for non-routable address, got nil")
}
}
func TestUTLS_ConnectionEviction(t *testing.T) {
tr := NewUTLS()
// Verify connections map starts empty
tr.mu.Lock()
if len(tr.connections) != 0 {
t.Errorf("initial connections = %d, want 0", len(tr.connections))
}
tr.mu.Unlock()
}
internal/version/version.go
+8
View File
@@ -0,0 +1,8 @@
// Package version provides the fallback Claude Code client version used when
// no sniffed profile is available. This constant is shared between the upstream
// proxy client and the rate limit usage poller.
package version
// ClaudeCodeFallback is the Claude Code CLI version string used as a fallback
// when no real version is obtained from sniffing.
const ClaudeCodeFallback = "2.1.92"
main.go
+77 -43
View File
@@ -12,6 +12,7 @@ import (
"github.com/fujin/anthropic-proxy/internal/auth"
"github.com/fujin/anthropic-proxy/internal/config"
"github.com/fujin/anthropic-proxy/internal/embedded"
"github.com/fujin/anthropic-proxy/internal/logging"
"github.com/fujin/anthropic-proxy/internal/proxy"
"github.com/fujin/anthropic-proxy/internal/ratelimit"
@@ -20,46 +21,10 @@ import (
"github.com/rs/zerolog/log"
)
func run() error {
cfg, err := config.Load("config.yaml")
func initCredential() (*auth.Credential, error) {
creds, err := auth.LoadDefaultCredentials()
if err != nil {
return fmt.Errorf("load config: %w", err)
}
// Create usage tracker (started later once credential is loaded)
var credForTracker *auth.Credential
tracker := ratelimit.NewTracker(func() string {
if credForTracker == nil {
return ""
}
return credForTracker.Token()
})
// Initialize telemetry (metrics always active; OTLP export when endpoint set)
telemetryShutdown, logBridge, err := telemetry.Setup(context.Background(), cfg.Telemetry, tracker)
if err != nil {
return fmt.Errorf("telemetry setup: %w", err)
}
defer telemetryShutdown(context.Background())
var extraWriters []io.Writer
if logBridge != nil {
extraWriters = append(extraWriters, logBridge)
}
logging.Setup(logging.Config{
Level: cfg.Logging.Level,
File: cfg.Logging.File,
MaxSizeMB: cfg.Logging.MaxSizeMB,
MaxBackups: cfg.Logging.MaxBackups,
MaxAgeDays: cfg.Logging.MaxAgeDays,
Compress: cfg.Logging.Compress,
}, extraWriters...)
// Load credentials from ~/.claude/.credentials.json
creds, err := config.LoadDefaultCredentials()
if err != nil {
return fmt.Errorf("load credentials: %w", err)
return nil, fmt.Errorf("load credentials: %w", err)
}
var cred *auth.Credential
@@ -81,19 +46,82 @@ func run() error {
}
if cred == nil {
// Non-TTY check: if stdin is not a terminal, can't do interactive login
fi, statErr := os.Stdin.Stat()
if statErr == nil && (fi.Mode()&os.ModeCharDevice) == 0 {
return fmt.Errorf("no valid credentials found; run the proxy interactively for initial login")
return nil, fmt.Errorf("no valid credentials found; run the proxy interactively for initial login")
}
log.Info().Msg("no credentials found, starting OAuth login")
cred, err = auth.Login(context.Background())
if err != nil {
return fmt.Errorf("login failed: %w", err)
return nil, fmt.Errorf("login failed: %w", err)
}
}
log.Info().Str("credential", cred.Email).Msg("credential loaded")
return cred, nil
}
func initEmbedded(cfg *config.Config) (cleanup func(), err error) {
if !cfg.Telemetry.Embedded.Enabled {
return func() {}, nil
}
var cleanups []func()
vm := embedded.NewVM(cfg.Telemetry.Embedded, cfg.Port)
if err := vm.Start(); err != nil {
log.Error().Err(err).Msg("failed to start victoria-metrics")
} else {
cleanups = append(cleanups, vm.Stop)
}
perses := embedded.NewPerses(cfg.Telemetry.Embedded, cfg.Port)
if err := perses.Start(); err != nil {
log.Error().Err(err).Msg("failed to start perses")
} else {
cleanups = append(cleanups, perses.Stop)
}
return func() {
for i := len(cleanups) - 1; i >= 0; i-- {
cleanups[i]()
}
}, nil
}
func run() error {
cfg, err := config.Load("config.yaml")
if err != nil {
return fmt.Errorf("load config: %w", err)
}
// Create usage tracker (started later once credential is loaded)
var credForTracker *auth.Credential
tracker := ratelimit.NewTracker(func() string {
if credForTracker == nil {
return ""
}
return credForTracker.Token()
})
// Initialize telemetry (metrics always active; OTLP export when endpoint set)
telemetryShutdown, logBridge, metricsHandler, err := telemetry.Setup(context.Background(), cfg.Telemetry, tracker)
if err != nil {
return fmt.Errorf("telemetry setup: %w", err)
}
defer telemetryShutdown(context.Background())
var extraWriters []io.Writer
if logBridge != nil {
extraWriters = append(extraWriters, logBridge)
}
logging.Setup(cfg.Logging, extraWriters...)
cred, err := initCredential()
if err != nil {
return err
}
credForTracker = cred
@@ -115,8 +143,14 @@ func run() error {
}
}
embeddedCleanup, err := initEmbedded(cfg)
if err != nil {
return err
}
defer embeddedCleanup()
log.Info().Int("port", cfg.Port).Msg("starting server")
srv := server.New(cfg, pool, profile, tracker)
srv := server.New(cfg, pool, profile, tracker, metricsHandler)
quit := make(chan os.Signal, 1)
signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
package.nix
+2 -2
View File
@@ -7,11 +7,11 @@
buildGoModule rec {
pname = "anthropic-proxy";
version = "0.0.4";
version = "0.0.5";
src = ./.;
vendorHash = "sha256-8pq4GYFjOfYcYLcZSuXMWn77RUxVGP18AcyzIJGbKf4=";
vendorHash = "sha256-yXINNC+NEw+HbOQ5aBgSE5dYTWp+zEZ230rzXfwOoDY=";
meta = with lib; {
description = "Reverse proxy that lets OpenCode (and similar tools) use a Claude subscription instead of an API key.";