Adds remote devtools support to cast_shell.

chromecast/shell/browser/devtools/remote_debugging_server.cc

+// Copyright 2014 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 "chromecast/shell/browser/devtools/remote_debugging_server.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/strings/stringprintf.h"
+#include "chromecast/common/chromecast_config.h"
+#include "chromecast/common/pref_names.h"
+#include "chromecast/shell/browser/devtools/cast_dev_tools_delegate.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/devtools_http_handler.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/common/user_agent.h"
+#include "net/socket/tcp_listen_socket.h"
+
+#if defined(OS_ANDROID)
+#include "content/public/browser/android/devtools_auth.h"
+#include "net/socket/unix_domain_socket_posix.h"
+#endif  // defined(OS_ANDROID)
+
+namespace chromecast {
+namespace shell {
+
+namespace {
+
+#if defined(OS_ANDROID)
+const char kFrontEndURL[] =
+    "http://chrome-devtools-frontend.appspot.com/serve_rev/%s/devtools.html";
+#endif  // defined(OS_ANDROID)
+const int kDefaultRemoteDebuggingPort = 9222;
+
+net::StreamListenSocketFactory* CreateSocketFactory(int port) {
+#if defined(OS_ANDROID)
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  std::string socket_name = "content_shell_devtools_remote";
+  if (command_line->HasSwitch(switches::kRemoteDebuggingSocketName)) {
+    socket_name = command_line->GetSwitchValueASCII(
+        switches::kRemoteDebuggingSocketName);
+  }
+  return new net::UnixDomainSocketWithAbstractNamespaceFactory(
+      socket_name, "", base::Bind(&content::CanUserConnectToDevTools));
+#else
+  return new net::TCPListenSocketFactory("0.0.0.0", port);
+#endif  // defined(OS_ANDROID)
+}
+
+std::string GetFrontendUrl() {
+#if defined(OS_ANDROID)
+  return base::StringPrintf(kFrontEndURL, content::GetWebKitRevision().c_str());
+#else
+  return std::string();
+#endif  // defined(OS_ANDROID)
+}
+
+}  // namespace
+
+RemoteDebuggingServer::RemoteDebuggingServer()
+    : devtools_http_handler_(NULL),
+      port_(0) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  pref_port_.Init(prefs::kRemoteDebuggingPort,
+                  ChromecastConfig::GetInstance()->pref_service(),
+                  base::Bind(&RemoteDebuggingServer::OnPortChanged,
+                             base::Unretained(this)));
+
+  // Starts new dev tools, clearing port number saved in config.
+  // Remote debugging in production must be triggered only by config server.
+  pref_port_.SetValue(ShouldStartImmediately() ?
+                      kDefaultRemoteDebuggingPort : 0);
+  OnPortChanged();
+}
+
+RemoteDebuggingServer::~RemoteDebuggingServer() {
+  pref_port_.SetValue(0);
+  OnPortChanged();
+}
+
+void RemoteDebuggingServer::OnPortChanged() {
+  int new_port = *pref_port_;
+  if (new_port < 0) {
+    new_port = 0;
+  }
+  VLOG(1) << "OnPortChanged called: old_port=" << port_
+          << ", new_port=" << new_port;
+
+  if (new_port == port_) {
+    VLOG(1) << "Port has not been changed. Ignore silently.";
+    return;
+  }
+
+  if (devtools_http_handler_) {
+    LOG(INFO) << "Stop old devtools: port=" << port_;
+    // Note: Stop destroys devtools_http_handler_.
+    devtools_http_handler_->Stop();
+    devtools_http_handler_ = NULL;
+  }
+
+  port_ = new_port;
+  if (port_ > 0) {
+    devtools_http_handler_ = content::DevToolsHttpHandler::Start(
+        CreateSocketFactory(port_),
+        GetFrontendUrl(),
+        new CastDevToolsDelegate(),
+        base::FilePath());
+    LOG(INFO) << "Devtools started: port=" << port_;
+  }
+}
+
+}  // namespace shell
+}  // namespace chromecast