Added support for gzip accepted_encoding in scgi headers.

src/rpc/scgi_task.h

@@ -3,6 +3,7 @@
 
 #include <memory>
 #include <mutex>
+#include <vector>
 #include <torrent/event.h>
 
 namespace rpc {
@@ -11,9 +12,9 @@ class SCgi;
 
 class SCgiTask : public torrent::Event {
 public:
-  static const unsigned int default_buffer_size = 2047;
-  static const          int max_header_size     = 2000;
-  static const          int max_content_size    = (2 << 23);
+  static constexpr int default_buffer_size = 8191;
+  static constexpr int max_header_size     = 2000;
+  static constexpr int max_content_size    = (2 << 23);
 
   enum ContentType { XML, JSON };
 
@@ -36,23 +37,35 @@ public:
   void                event_error() override;
 
 private:
+  static constexpr char header_xml[]  = "Status: 200 OK\r\nContent-Type: text/xml\r\nContent-Length: ";
+  static constexpr char header_json[] = "Status: 200 OK\r\nContent-Type: application/json\r\nContent-Length: ";
+  static constexpr char header_last[] = "\r\n\r\n";
+
+  static constexpr size_t header_xml_size  = sizeof(header_xml) - 1;
+  static constexpr size_t header_json_size = sizeof(header_json) - 1;
+  static constexpr size_t header_last_size = sizeof(header_last) - 1;
+
+  bool                parse_headers(const char* current, unsigned int header_length);
   bool                detect_content_type(const std::string& content_type);
-  void                realloc_buffer(uint32_t size, const char* buffer, uint32_t bufferSize);
 
   void                receive_call(const char* buffer, uint32_t length);
   void                receive_write(const char* buffer, uint32_t length);
 
+  void                plaintext_response(const char* buffer, uint32_t content_length);
+  void                gzip_response(const char* buffer, uint32_t content_length);
+
   SCgi*               m_parent{};
 
   std::mutex          m_result_mutex;
 
-  std::unique_ptr<char[]> m_buffer;
-  char*                   m_position{};
-  char*                   m_body{};
+  std::vector<char>   m_buffer;
+  unsigned int        m_position{};
+  unsigned int        m_body{};
 
-  unsigned int        m_buffer_size{0};
+  unsigned int        m_content_length{};
+  ContentType         m_content_type{XML};
 
-  ContentType         m_content_type{ XML };
+  bool                m_accepts_compression{};
   bool                m_trusted{true};
 };