Replace StreamListenSocket with StreamSocket in HttpServer.

net/server/http_connection.h

Index: net/server/http_connection.h
diff --git a/net/server/http_connection.h b/net/server/http_connection.h
index 17faa46eb6b77304085635364f4a73b65c3c7821..c7225e1a01d24d9088e5c10d92a92da5b89cd385 100644
--- a/net/server/http_connection.h
+++ b/net/server/http_connection.h
@@ -5,43 +5,130 @@
 #ifndef NET_SERVER_HTTP_CONNECTION_H_
 #define NET_SERVER_HTTP_CONNECTION_H_
 
+#include <queue>
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "net/http/http_status_code.h"
+#include "net/base/io_buffer.h"
 
 namespace net {
 
-class HttpServer;
-class HttpServerResponseInfo;
-class StreamListenSocket;
+class StreamSocket;
 class WebSocket;
 
+// A container which has all information of an http connection. It includes
+// id, underlying socket, and pending read/write data.
 class HttpConnection {
  public:
-  ~HttpConnection();
+  // IOBuffer for data read.  It's a wrapper around GrowableIOBuffer, with more
+  // functions for buffer management.  It moves unconsumed data to the start of
+  // buffer.
+  class ReadIOBuffer : public IOBuffer {
+   public:
+    static const int kInitialBufSize = 1024;
+    static const int kMinimumBufSize = 128;
+    static const int kCapacityIncreaseFactor = 2;
+    static const int kDefaultMaxBufferSize = 1 * 1024 * 1024;  // 1 Mbytes.
+
+    ReadIOBuffer();
+
+    // Capacity.
+    int GetCapacity() const;
+    void SetCapacity(int capacity);
+    // Increases capacity and returns true if capacity is not beyond the limit.
+    bool IncreaseCapacity();
+
+    // Start of read data.
+    char* StartOfBuffer() const;
+    // Returns the bytes of read data.
+    int GetSize() const;
+    // More read data was appended.
+    void DidRead(int bytes);
+    // Capacity for which more read data can be appended.
+    int RemainingCapacity() const;
+
+    // Removes consumed data and moves unconsumed data to the start of buffer.
+    void DidConsume(int bytes);
+
+    // Limit of how much internal capacity can increase.
+    int max_buffer_size() const { return max_buffer_size_; }
+    void set_max_buffer_size(int max_buffer_size) {
+      max_buffer_size_ = max_buffer_size;
+    }
+
+   private:
+    virtual ~ReadIOBuffer();
+
+    scoped_refptr<GrowableIOBuffer> base_;
+    int max_buffer_size_;
+
+    DISALLOW_COPY_AND_ASSIGN(ReadIOBuffer);
+  };
+
+  // IOBuffer of pending data to write which has a queue of pending data. Each
+  // pending data is stored in std::string.  data() is the data of first
+  // std::string stored.
+  class QueuedWriteIOBuffer : public IOBuffer {
+   public:
+    static const int kDefaultMaxBufferSize = 1 * 1024 * 1024;  // 1 Mbytes.
+
+    QueuedWriteIOBuffer();
+
+    // Whether or not pending data exists.
+    bool IsEmpty() const;
 
-  void Send(const std::string& data);
-  void Send(const char* bytes, int len);
-  void Send(const HttpServerResponseInfo& response);
+    // Appends new pending data and returns true if total size doesn't exceed
+    // the limit, |total_size_limit_|.  It would change data() if new data is
+    // the first pending data.
+    bool Append(const std::string& data);
 
-  void Shift(int num_bytes);
+    // Consumes data and changes data() accordingly.  It cannot be more than
+    // GetSizeToWrite().
+    void DidConsume(int size);
+
+    // Gets size of data to write this time. It is NOT total data size.
+    int GetSizeToWrite() const;
+
+    // Total size of all pending data.
+    int total_size() const { return total_size_; }
+
+    // Limit of how much data can be pending.
+    int max_buffer_size() const { return max_buffer_size_; }
+    void set_max_buffer_size(int max_buffer_size) {
+      max_buffer_size_ = max_buffer_size;
+    }
+
+   private:
+    virtual ~QueuedWriteIOBuffer();
+
+    std::queue<std::string> pending_data_;
+    int total_size_;
+    int max_buffer_size_;
+
+    DISALLOW_COPY_AND_ASSIGN(QueuedWriteIOBuffer);
+  };
+
+  HttpConnection(int id, scoped_ptr<StreamSocket> socket);
+  ~HttpConnection();
 
-  const std::string& recv_data() const { return recv_data_; }
   int id() const { return id_; }
+  StreamSocket* socket() const { return socket_.get(); }
+  ReadIOBuffer* read_buf() const { return read_buf_.get(); }
+  QueuedWriteIOBuffer* write_buf() const { return write_buf_.get(); }
 
- private:
-  friend class HttpServer;
-  static int last_id_;
+  WebSocket* web_socket() const { return web_socket_.get(); }
+  void SetWebSocket(scoped_ptr<WebSocket> web_socket);
 
-  HttpConnection(HttpServer* server, scoped_ptr<StreamListenSocket> sock);
+ private:
+  const int id_;
+  const scoped_ptr<StreamSocket> socket_;
+  const scoped_refptr<ReadIOBuffer> read_buf_;
+  const scoped_refptr<QueuedWriteIOBuffer> write_buf_;
 
-  HttpServer* server_;
-  scoped_ptr<StreamListenSocket> socket_;
   scoped_ptr<WebSocket> web_socket_;
-  std::string recv_data_;
-  int id_;
+
   DISALLOW_COPY_AND_ASSIGN(HttpConnection);
 };