chromecast/browser/devtools/remote_debugging_server.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chromecast/browser/devtools/remote_debugging_server.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/command_line.h"
  10 #include "base/files/file_path.h"
  11 #include "base/strings/stringprintf.h"
  12 #include "chromecast/browser/cast_browser_process.h"
  13 #include "chromecast/browser/devtools/cast_dev_tools_delegate.h"
  14 #include "chromecast/common/cast_content_client.h"
  15 #include "chromecast/common/pref_names.h"
  16 #include "components/devtools_http_handler/devtools_http_handler.h"
  17 #include "content/public/browser/browser_context.h"
  18 #include "content/public/browser/browser_thread.h"
  19 #include "content/public/common/content_switches.h"
  20 #include "content/public/common/user_agent.h"
  21 #include "net/base/net_errors.h"
  22 #include "net/socket/tcp_server_socket.h"
  23
  24 #if defined(OS_ANDROID)
  25 #include "content/public/browser/android/devtools_auth.h"
  26 #include "net/socket/unix_domain_server_socket_posix.h"
  27 #endif  // defined(OS_ANDROID)
  28
  29 using devtools_http_handler::DevToolsHttpHandler;
  30
  31 namespace chromecast {
  32 namespace shell {
  33
  34 namespace {
  35
  36 const char kFrontEndURL[] =
  37     "https://chrome-devtools-frontend.appspot.com/serve_rev/%s/inspector.html";
  38 const uint16 kDefaultRemoteDebuggingPort = 9222;
  39
  40 const int kBackLog = 10;
  41
  42 #if defined(OS_ANDROID)
  43 class UnixDomainServerSocketFactory
  44     : public DevToolsHttpHandler::ServerSocketFactory {
  45  public:
  46   explicit UnixDomainServerSocketFactory(const std::string& socket_name)
  47       : socket_name_(socket_name) {}
  48
  49  private:
  50   // devtools_http_handler::DevToolsHttpHandler::ServerSocketFactory.
  51   scoped_ptr<net::ServerSocket> CreateForHttpServer() override {
  52     scoped_ptr<net::ServerSocket> socket(
  53         new net::UnixDomainServerSocket(
  54             base::Bind(&content::CanUserConnectToDevTools),
  55             true /* use_abstract_namespace */));
  56     if (socket->ListenWithAddressAndPort(socket_name_, 0, kBackLog) != net::OK)
  57       return scoped_ptr<net::ServerSocket>();
  58
  59     return socket;
  60   }
  61
  62   std::string socket_name_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(UnixDomainServerSocketFactory);
  65 };
  66 #else
  67 class TCPServerSocketFactory
  68     : public DevToolsHttpHandler::ServerSocketFactory {
  69  public:
  70   TCPServerSocketFactory(const std::string& address, uint16 port)
  71       : address_(address), port_(port) {
  72   }
  73
  74  private:
  75   // devtools_http_handler::DevToolsHttpHandler::ServerSocketFactory.
  76   scoped_ptr<net::ServerSocket> CreateForHttpServer() override {
  77     scoped_ptr<net::ServerSocket> socket(
  78         new net::TCPServerSocket(nullptr, net::NetLog::Source()));
  79     if (socket->ListenWithAddressAndPort(address_, port_, kBackLog) != net::OK)
  80       return scoped_ptr<net::ServerSocket>();
  81
  82     return socket;
  83   }
  84
  85   std::string address_;
  86   uint16 port_;
  87
  88   DISALLOW_COPY_AND_ASSIGN(TCPServerSocketFactory);
  89 };
  90 #endif
  91
  92 scoped_ptr<DevToolsHttpHandler::ServerSocketFactory>
  93 CreateSocketFactory(uint16 port) {
  94 #if defined(OS_ANDROID)
  95   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  96   std::string socket_name = "cast_shell_devtools_remote";
  97   if (command_line->HasSwitch(switches::kRemoteDebuggingSocketName)) {
  98     socket_name = command_line->GetSwitchValueASCII(
  99         switches::kRemoteDebuggingSocketName);
 100   }
 101   return scoped_ptr<DevToolsHttpHandler::ServerSocketFactory>(
 102       new UnixDomainServerSocketFactory(socket_name));
 103 #else
 104   return scoped_ptr<DevToolsHttpHandler::ServerSocketFactory>(
 105       new TCPServerSocketFactory("0.0.0.0", port));
 106 #endif
 107 }
 108
 109 std::string GetFrontendUrl() {
 110   return base::StringPrintf(kFrontEndURL, content::GetWebKitRevision().c_str());
 111 }
 112
 113 }  // namespace
 114
 115 RemoteDebuggingServer::RemoteDebuggingServer() : port_(0) {
 116   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 117   pref_port_.Init(prefs::kRemoteDebuggingPort,
 118                   CastBrowserProcess::GetInstance()->pref_service(),
 119                   base::Bind(&RemoteDebuggingServer::OnPortChanged,
 120                              base::Unretained(this)));
 121
 122   // Starts new dev tools, clearing port number saved in config.
 123   // Remote debugging in production must be triggered only by config server.
 124   pref_port_.SetValue(ShouldStartImmediately() ?
 125                       kDefaultRemoteDebuggingPort : 0);
 126   OnPortChanged();
 127 }
 128
 129 RemoteDebuggingServer::~RemoteDebuggingServer() {
 130   pref_port_.SetValue(0);
 131   OnPortChanged();
 132 }
 133
 134 void RemoteDebuggingServer::OnPortChanged() {
 135   uint16 new_port = static_cast<uint16>(std::max(*pref_port_, 0));
 136   VLOG(1) << "OnPortChanged called: old_port=" << port_
 137           << ", new_port=" << new_port;
 138
 139   if (new_port == port_) {
 140     VLOG(1) << "Port has not been changed. Ignore silently.";
 141     return;
 142   }
 143
 144   if (devtools_http_handler_) {
 145     LOG(INFO) << "Stop old devtools: port=" << port_;
 146     devtools_http_handler_.reset();
 147   }
 148
 149   port_ = new_port;
 150   if (port_ > 0) {
 151     devtools_http_handler_.reset(new DevToolsHttpHandler(
 152         CreateSocketFactory(port_),
 153         GetFrontendUrl(),
 154         new CastDevToolsDelegate(),
 155         base::FilePath(),
 156         base::FilePath(),
 157         std::string(),
 158         GetUserAgent()));
 159     LOG(INFO) << "Devtools started: port=" << port_;
 160   }
 161 }
 162
 163 }  // namespace shell
 164 }  // namespace chromecast