Implement websocket throttling.

net/socket_stream/socket_stream.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // TODO(ukai): code is similar with http_network_transaction.cc.  We should
 //   think about ways to share code, if possible.
 
 #include "net/socket_stream/socket_stream.h"
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "net/base/auth.h"
 #include "net/base/host_resolver.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
 #include "net/socket/client_socket_factory.h"
 #include "net/socket/ssl_client_socket.h"
 #include "net/socket/socks5_client_socket.h"
 #include "net/socket/socks_client_socket.h"
 #include "net/socket/tcp_client_socket.h"
+#include "net/socket_stream/socket_stream_throttle.h"
 #include "net/url_request/url_request.h"
 
 static const int kMaxPendingSendAllowed = 32768;  // 32 kilobytes.
 static const int kReadBufferSize = 4096;
 
 namespace net {
 
 void SocketStream::ResponseHeaders::Realloc(size_t new_size) {
   headers_.reset(static_cast<char*>(realloc(headers_.release(), new_size)));
 }
@@ skipping 10 matching lines @@
       ALLOW_THIS_IN_INITIALIZER_LIST(
           io_callback_(this, &SocketStream::OnIOCompleted)),
       ALLOW_THIS_IN_INITIALIZER_LIST(
           read_callback_(this, &SocketStream::OnReadCompleted)),
       ALLOW_THIS_IN_INITIALIZER_LIST(
           write_callback_(this, &SocketStream::OnWriteCompleted)),
       read_buf_(NULL),
       write_buf_(NULL),
       current_write_buf_(NULL),
       write_buf_offset_(0),
-      write_buf_size_(0) {
+      write_buf_size_(0),
+      throttle_(
+          SocketStreamThrottle::GetSocketStreamThrottleForScheme(
+              url.scheme())) {
   DCHECK(MessageLoop::current()) <<
       "The current MessageLoop must exist";
   DCHECK_EQ(MessageLoop::TYPE_IO, MessageLoop::current()->type()) <<
       "The current MessageLoop must be TYPE_IO";
   DCHECK(delegate_);
+  DCHECK(throttle_);
 }
 
 SocketStream::~SocketStream() {
   DCHECK(!delegate_);
 }
 
 SocketStream::UserData* SocketStream::GetUserData(
     const void* key) const {
   UserDataMap::const_iterator found = user_data_.find(key);
   if (found != user_data_.end())
@@ skipping 118 matching lines @@
   DCHECK_EQ(next_state_, STATE_NONE);
   DLOG(INFO) << "Finish";
   if (delegate_)
     delegate_->OnError(this, result);
 
   Delegate* delegate = delegate_;
   delegate_ = NULL;
   if (delegate) {
     delegate->OnClose(this);
   }
+  throttle_->OnClose(this);
   Release();
 }
 
 void SocketStream::SetHostResolver(HostResolver* host_resolver) {
   DCHECK(host_resolver);
   host_resolver_ = host_resolver;
 }
 
 void SocketStream::SetClientSocketFactory(
     ClientSocketFactory* factory) {
   DCHECK(factory);
   factory_ = factory;
 }
 
+void SocketStream::CopyAddrInfo(struct addrinfo* head) {
+  addresses_.Copy(head);
+}
+
 int SocketStream::DidEstablishConnection() {
   if (!socket_.get() || !socket_->IsConnected()) {
     next_state_ = STATE_CLOSE;
     return ERR_CONNECTION_FAILED;
   }
   next_state_ = STATE_READ_WRITE;
 
   if (delegate_)
     delegate_->OnConnected(this, max_pending_send_allowed_);
 
   return OK;
 }
 
-void SocketStream::DidReceiveData(int result) {
+int SocketStream::DidReceiveData(int result) {
   DCHECK(read_buf_);
   DCHECK_GT(result, 0);
-  if (!delegate_)
-    return;
-  // Notify recevied data to delegate.
-  delegate_->OnReceivedData(this, read_buf_->data(), result);
+  int len = result;
+  result = throttle_->OnRead(this, read_buf_->data(), len, &io_callback_);
+  if (delegate_) {
+    // Notify recevied data to delegate.
+    delegate_->OnReceivedData(this, read_buf_->data(), len);
+  }
   read_buf_ = NULL;
+  return result;
 }
 
-void SocketStream::DidSendData(int result) {
+int SocketStream::DidSendData(int result) {
+  DCHECK_GT(result, 0);
+  int len = result;
+  result = throttle_->OnWrite(this, current_write_buf_->data(), len,
+                              &io_callback_);
   current_write_buf_ = NULL;
-  DCHECK_GT(result, 0);
-  if (!delegate_)
-    return;
+  if (delegate_)
+    delegate_->OnSentData(this, len);
 
-  delegate_->OnSentData(this, result);
-  int remaining_size = write_buf_size_ - write_buf_offset_ - result;
+  int remaining_size = write_buf_size_ - write_buf_offset_ - len;
   if (remaining_size == 0) {
     if (!pending_write_bufs_.empty()) {
       write_buf_size_ = pending_write_bufs_.front()->size();
       write_buf_ = pending_write_bufs_.front();
       pending_write_bufs_.pop_front();
     } else {
       write_buf_size_ = 0;
       write_buf_ = NULL;
     }
     write_buf_offset_ = 0;
   } else {
-    write_buf_offset_ += result;
+    write_buf_offset_ += len;
   }
+  return result;
 }
 
 void SocketStream::OnIOCompleted(int result) {
   DoLoop(result);
 }
 
 void SocketStream::OnReadCompleted(int result) {
   if (result == 0) {
     // 0 indicates end-of-file, so socket was closed.
     next_state_ = STATE_CLOSE;
   } else if (result > 0 && read_buf_) {
-    DidReceiveData(result);
-    result = OK;
+    result = DidReceiveData(result);
   }
   DoLoop(result);
 }
 
 void SocketStream::OnWriteCompleted(int result) {
   if (result >= 0 && write_buf_) {
-    DidSendData(result);
-    result = OK;
+    result = DidSendData(result);
   }
   DoLoop(result);
 }
 
 void SocketStream::DoLoop(int result) {
   if (next_state_ == STATE_NONE)
     return;
 
   do {
     State state = next_state_;
@@ skipping 109 matching lines @@
     port = url_.EffectiveIntPort();
   }
 
   HostResolver::RequestInfo resolve_info(host, port);
 
   resolver_.reset(new SingleRequestHostResolver(host_resolver_.get()));
   return resolver_->Resolve(resolve_info, &addresses_, &io_callback_, NULL);
 }
 
 int SocketStream::DoResolveHostComplete(int result) {
-  if (result == OK)
+  if (result == OK) {
     next_state_ = STATE_TCP_CONNECT;
-  else
+    result = throttle_->OnStartOpenConnection(this, &io_callback_);
+  } else {
     next_state_ = STATE_CLOSE;
+  }
   // TODO(ukai): if error occured, reconsider proxy after error.
   return result;
 }
 
 int SocketStream::DoTcpConnect() {
   next_state_ = STATE_TCP_CONNECT_COMPLETE;
   DCHECK(factory_);
   socket_.reset(factory_->CreateTCPClientSocket(addresses_));
   // TODO(willchan): Plumb LoadLog into SocketStream.
   return socket_->Connect(&io_callback_, NULL);
@@ skipping 249 matching lines @@
     return ERR_CONNECTION_CLOSED;
   }
 
   next_state_ = STATE_READ_WRITE;
 
   if (!read_buf_) {
     // No read pending.
     read_buf_ = new IOBuffer(kReadBufferSize);
     result = socket_->Read(read_buf_, kReadBufferSize, &read_callback_);
     if (result > 0) {
-      DidReceiveData(result);
-      return OK;
+      return DidReceiveData(result);
     } else if (result == 0) {
       // 0 indicates end-of-file, so socket was closed.
       next_state_ = STATE_CLOSE;
       return ERR_CONNECTION_CLOSED;
     }
     // If read is pending, try write as well.
     // Otherwise, return the result and do next loop (to close the connection).
     if (result != ERR_IO_PENDING) {
       next_state_ = STATE_CLOSE;
       return result;
     }
   }
   // Read is pending.
   DCHECK(read_buf_);
 
   if (write_buf_ && !current_write_buf_) {
     // No write pending.
     current_write_buf_ = new DrainableIOBuffer(write_buf_, write_buf_size_);
     current_write_buf_->SetOffset(write_buf_offset_);
     result = socket_->Write(current_write_buf_,
                             current_write_buf_->BytesRemaining(),
                             &write_callback_);
     if (result > 0) {
-      DidSendData(result);
-      return OK;
+      return DidSendData(result);
     }
     // If write is not pending, return the result and do next loop (to close
     // the connection).
     if (result != 0 && result != ERR_IO_PENDING) {
       next_state_ = STATE_CLOSE;
       return result;
     }
     return result;
   }
 
@@ skipping 95 matching lines @@
 
 SSLConfigService* SocketStream::ssl_config_service() const {
   return context_->ssl_config_service();
 }
 
 ProxyService* SocketStream::proxy_service() const {
   return context_->proxy_service();
 }
 
 }  // namespace net