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 "extensions/browser/api/sockets_tcp_server/tcp_server_socket_event_dispatcher.h" 6 7 #include "base/lazy_instance.h" 8 #include "extensions/browser/api/socket/tcp_socket.h" 9 #include "extensions/browser/event_router.h" 10 #include "extensions/browser/extensions_browser_client.h" 11 #include "net/base/net_errors.h" 12 13 namespace extensions { 14 namespace core_api { 15 16 using content::BrowserThread; 17 18 static base::LazyInstance< 19 BrowserContextKeyedAPIFactory<TCPServerSocketEventDispatcher> > g_factory = 20 LAZY_INSTANCE_INITIALIZER; 21 22 // static 23 BrowserContextKeyedAPIFactory<TCPServerSocketEventDispatcher>* 24 TCPServerSocketEventDispatcher::GetFactoryInstance() { 25 return g_factory.Pointer(); 26 } 27 28 // static 29 TCPServerSocketEventDispatcher* TCPServerSocketEventDispatcher::Get( 30 content::BrowserContext* context) { 31 DCHECK_CURRENTLY_ON(BrowserThread::UI); 32 33 return BrowserContextKeyedAPIFactory<TCPServerSocketEventDispatcher>::Get( 34 context); 35 } 36 37 TCPServerSocketEventDispatcher::TCPServerSocketEventDispatcher( 38 content::BrowserContext* context) 39 : thread_id_(Socket::kThreadId), browser_context_(context) { 40 ApiResourceManager<ResumableTCPServerSocket>* server_manager = 41 ApiResourceManager<ResumableTCPServerSocket>::Get(browser_context_); 42 DCHECK(server_manager) 43 << "There is no server socket manager. " 44 "If this assertion is failing during a test, then it is likely that " 45 "TestExtensionSystem is failing to provide an instance of " 46 "ApiResourceManager<ResumableTCPServerSocket>."; 47 server_sockets_ = server_manager->data_; 48 49 ApiResourceManager<ResumableTCPSocket>* client_manager = 50 ApiResourceManager<ResumableTCPSocket>::Get(browser_context_); 51 DCHECK(client_manager) 52 << "There is no client socket manager. " 53 "If this assertion is failing during a test, then it is likely that " 54 "TestExtensionSystem is failing to provide an instance of " 55 "ApiResourceManager<ResumableTCPSocket>."; 56 client_sockets_ = client_manager->data_; 57 } 58 59 TCPServerSocketEventDispatcher::~TCPServerSocketEventDispatcher() {} 60 61 TCPServerSocketEventDispatcher::AcceptParams::AcceptParams() {} 62 63 TCPServerSocketEventDispatcher::AcceptParams::~AcceptParams() {} 64 65 void TCPServerSocketEventDispatcher::OnServerSocketListen( 66 const std::string& extension_id, 67 int socket_id) { 68 DCHECK_CURRENTLY_ON(thread_id_); 69 70 StartSocketAccept(extension_id, socket_id); 71 } 72 73 void TCPServerSocketEventDispatcher::OnServerSocketResume( 74 const std::string& extension_id, 75 int socket_id) { 76 DCHECK_CURRENTLY_ON(thread_id_); 77 78 StartSocketAccept(extension_id, socket_id); 79 } 80 81 void TCPServerSocketEventDispatcher::StartSocketAccept( 82 const std::string& extension_id, 83 int socket_id) { 84 DCHECK_CURRENTLY_ON(thread_id_); 85 86 AcceptParams params; 87 params.thread_id = thread_id_; 88 params.browser_context_id = browser_context_; 89 params.extension_id = extension_id; 90 params.server_sockets = server_sockets_; 91 params.client_sockets = client_sockets_; 92 params.socket_id = socket_id; 93 94 StartAccept(params); 95 } 96 97 // static 98 void TCPServerSocketEventDispatcher::StartAccept(const AcceptParams& params) { 99 DCHECK_CURRENTLY_ON(params.thread_id); 100 101 ResumableTCPServerSocket* socket = 102 params.server_sockets->Get(params.extension_id, params.socket_id); 103 if (!socket) { 104 // This can happen if the socket is closed while our callback is active. 105 return; 106 } 107 DCHECK(params.extension_id == socket->owner_extension_id()) 108 << "Socket has wrong owner."; 109 110 // Don't start another accept if the socket has been paused. 111 if (socket->paused()) 112 return; 113 114 socket->Accept( 115 base::Bind(&TCPServerSocketEventDispatcher::AcceptCallback, params)); 116 } 117 118 // static 119 void TCPServerSocketEventDispatcher::AcceptCallback( 120 const AcceptParams& params, 121 int result_code, 122 net::TCPClientSocket* socket) { 123 DCHECK_CURRENTLY_ON(params.thread_id); 124 125 if (result_code >= 0) { 126 ResumableTCPSocket* client_socket = 127 new ResumableTCPSocket(socket, params.extension_id, true); 128 client_socket->set_paused(true); 129 int client_socket_id = params.client_sockets->Add(client_socket); 130 131 // Dispatch "onAccept" event. 132 sockets_tcp_server::AcceptInfo accept_info; 133 accept_info.socket_id = params.socket_id; 134 accept_info.client_socket_id = client_socket_id; 135 scoped_ptr<base::ListValue> args = 136 sockets_tcp_server::OnAccept::Create(accept_info); 137 scoped_ptr<Event> event( 138 new Event(sockets_tcp_server::OnAccept::kEventName, args.Pass())); 139 PostEvent(params, event.Pass()); 140 141 // Post a task to delay the "accept" until the socket is available, as 142 // calling StartAccept at this point would error with ERR_IO_PENDING. 143 BrowserThread::PostTask( 144 params.thread_id, 145 FROM_HERE, 146 base::Bind(&TCPServerSocketEventDispatcher::StartAccept, params)); 147 } else { 148 // Dispatch "onAcceptError" event but don't start another accept to avoid 149 // potential infinite "accepts" if we have a persistent network error. 150 sockets_tcp_server::AcceptErrorInfo accept_error_info; 151 accept_error_info.socket_id = params.socket_id; 152 accept_error_info.result_code = result_code; 153 scoped_ptr<base::ListValue> args = 154 sockets_tcp_server::OnAcceptError::Create(accept_error_info); 155 scoped_ptr<Event> event( 156 new Event(sockets_tcp_server::OnAcceptError::kEventName, args.Pass())); 157 PostEvent(params, event.Pass()); 158 159 // Since we got an error, the socket is now "paused" until the application 160 // "resumes" it. 161 ResumableTCPServerSocket* socket = 162 params.server_sockets->Get(params.extension_id, params.socket_id); 163 if (socket) { 164 socket->set_paused(true); 165 } 166 } 167 } 168 169 // static 170 void TCPServerSocketEventDispatcher::PostEvent(const AcceptParams& params, 171 scoped_ptr<Event> event) { 172 DCHECK_CURRENTLY_ON(params.thread_id); 173 174 BrowserThread::PostTask(BrowserThread::UI, 175 FROM_HERE, 176 base::Bind(&DispatchEvent, 177 params.browser_context_id, 178 params.extension_id, 179 base::Passed(event.Pass()))); 180 } 181 182 // static 183 void TCPServerSocketEventDispatcher::DispatchEvent( 184 void* browser_context_id, 185 const std::string& extension_id, 186 scoped_ptr<Event> event) { 187 DCHECK_CURRENTLY_ON(BrowserThread::UI); 188 189 content::BrowserContext* context = 190 reinterpret_cast<content::BrowserContext*>(browser_context_id); 191 if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(context)) 192 return; 193 EventRouter* router = EventRouter::Get(context); 194 if (router) 195 router->DispatchEventToExtension(extension_id, event.Pass()); 196 } 197 198 } // namespace core_api 199 } // namespace extensions 200
