Introduce webkit_glue bridges for the new WebSocket Implementation.

content/child/websocket_dispatcher.cc

+// Copyright (c) 2013 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.
+
+#include "content/child/websocket_dispatcher.h"
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/logging.h"
+#include "content/child/websocket_bridge.h"
+#include "content/common/websocket_messages.h"
+#include "ipc/ipc_message.h"
+#include "ipc/ipc_message_macros.h"
+#include "url/gurl.h"
+#include "third_party/WebKit/public/platform/WebSocketHandle.h"
+#include "third_party/WebKit/public/platform/WebSocketHandleClient.h"
+
+using WebKit::WebSocketHandle;
+using WebKit::WebSocketHandleClient;
+using WebKit::WebString;
+using WebKit::WebURL;
+using WebKit::WebVector;
+
+namespace content {
+
+WebSocketDispatcher::WebSocketDispatcher() : channel_id_max_(0) {}
+
+WebSocketDispatcher::~WebSocketDispatcher() {}
+
+int WebSocketDispatcher::AddBridge(WebSocketBridge* bridge) {
+  ++channel_id_max_;
+  bridges_.insert(std::make_pair(channel_id_max_, bridge));
+  return channel_id_max_;
+}
+
+void WebSocketDispatcher::RemoveBridge(int channel_id) {
+  std::map<int, WebSocketBridge*>::iterator i = bridges_.find(channel_id);
+  if (i == bridges_.end()) {
+    DVLOG(1) << "Remove a non-existent bridge(" << channel_id << ")";
+    return;
+  }
+  bridges_.erase(i);
+}
+
+bool WebSocketDispatcher::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(WebSocketDispatcher, msg)
+    IPC_MESSAGE_HANDLER(WebSocketMsg_AddChannelResponse, OnConnected)
+    IPC_MESSAGE_HANDLER(WebSocketMsg_SendFrame, OnReceivedData)
+    IPC_MESSAGE_HANDLER(WebSocketMsg_FlowControl, OnReceivedFlowControl)
+    IPC_MESSAGE_HANDLER(WebSocketMsg_DropChannel, OnClosed)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()

[piman, 2013/09/20 03:39:06]

I still think this should be using routed messages. Routing IDs don't need to be
centrally managed. They can be "scoped" by the message types.

This would become:

switch (msg.type()) {
  case WebSocketMsg_AddChannelResponse::ID:
  case WebSocketMsg_SendFrame::ID:
  case WebSocketMsg_FlowControl::ID:
  case WebSocketMsg_DropChannel::ID:
    break;
  default:
    return false;
}

WebSocketBridge* bridge = GetBridge(msg.routing_id());
if (!bridge)
  return true;
return bridge->OnMessageReceived(msg);


And then you can remove all the other functions below.

[yhirano, 2013/09/20 08:42:28]

I got it!
Then, we can remove functions without changing the actual behavior nor the
message dispatch mechanism, is that correct?

Done.

[piman, 2013/09/20 16:30:13]

Right, all the message logic is now in WebSocketBridge, resulting in less code,
and when you need to change the messages, you only have one class to update
instead of 2.

+  return handled;
+}
+
+void WebSocketDispatcher::OnConnected(int channel_id,
+                                      bool fail,
+                                      const std::string& selected_protocol,
+                                      const std::string& extensions) {
+  DVLOG(1) << "WebSocketDispatcher::OnConnected("
+           << channel_id << ", "
+           << fail << ", "
+           << selected_protocol << ", "
+           << extensions << ")";
+  WebSocketBridge* bridge = GetBridge(channel_id);
+  if (!bridge) return;

[piman, 2013/09/20 03:39:06]

nit: statement on next line.

[yhirano, 2013/09/20 08:42:28]

I deleted the code.

+  WebString protocol_to_pass = WebString::fromUTF8(selected_protocol);
+  WebString extensions_to_pass = WebString::fromUTF8(extensions);
+  bridge->DidConnect(fail, protocol_to_pass, extensions_to_pass);
+}
+
+void WebSocketDispatcher::OnReceivedData(int channel_id,
+                                         bool fin,
+                                         WebSocketMessageType type,
+                                         const std::vector<char>& data) {
+  DVLOG(1) << "WebSocketDispatcher::OnReceivedData("
+           << channel_id << ", "
+           << fin << ", "
+           << type << ", "
+           << "(data size = " << data.size() << "))";
+  WebSocketBridge* bridge = GetBridge(channel_id);
+  if (!bridge) return;

[piman, 2013/09/20 03:39:06]

nit: statement on next line.

[yhirano, 2013/09/20 08:42:28]

I deleted the code.

+  WebSocketHandle::MessageType type_to_pass =
+      WebSocketHandle::MessageTypeContinuation;
+  switch (type) {
+    case WEB_SOCKET_MESSAGE_TYPE_CONTINUATION:
+      type_to_pass = WebSocketHandle::MessageTypeContinuation;
+      break;
+    case WEB_SOCKET_MESSAGE_TYPE_TEXT:
+      type_to_pass = WebSocketHandle::MessageTypeText;
+      break;
+    case WEB_SOCKET_MESSAGE_TYPE_BINARY:
+      type_to_pass = WebSocketHandle::MessageTypeBinary;
+      break;
+  }
+  bridge->DidReceiveData(fin, type_to_pass, data.data(), data.size());
+}
+
+void WebSocketDispatcher::OnReceivedFlowControl(int channel_id, int64 quota) {
+  DVLOG(1) << "WebSocketDispatcher::OnReceivedFlowControl("
+           << channel_id << ", "
+           << quota << ")";
+  WebSocketBridge* bridge = GetBridge(channel_id);
+  if (!bridge) return;

[piman, 2013/09/20 03:39:06]

nit: statement on next line.

[yhirano, 2013/09/20 08:42:28]

I deleted the code.

+  bridge->DidReceiveFlowControl(quota);
+}
+
+void WebSocketDispatcher::OnClosed(int channel_id,
+                                   unsigned short code,
+                                   const std::string& reason) {
+  DVLOG(1) << "WebSocketDispatcher::OnClosed("
+           << channel_id << ", "
+           << code << ", "
+           << reason << ")";
+  WebSocketBridge* bridge = GetBridge(channel_id);
+  if (!bridge) return;

[piman, 2013/09/20 03:39:06]

nit: statement on next line.

[yhirano, 2013/09/20 08:42:28]

I deleted the code.

+  WebString reason_to_pass = WebString::fromUTF8(reason);
+  bridge->DidClose(code, reason_to_pass);
+}
+
+WebSocketBridge* WebSocketDispatcher::GetBridge(int channel_id) {
+  std::map<int, WebSocketBridge*>::iterator i = bridges_.find(channel_id);
+  if (i == bridges_.end()) {
+    DVLOG(1) << "No bridge for channel_id=" << channel_id;
+    return NULL;
+  }
+  return i->second;
+}
+
+}  // namespace content