src/content/renderer/shared_worker/embedded_shared_worker_stub.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 "content/renderer/shared_worker/embedded_shared_worker_stub.h"
   6
   7 #include "base/message_loop/message_loop_proxy.h"
   8 #include "content/child/appcache/appcache_dispatcher.h"
   9 #include "content/child/appcache/web_application_cache_host_impl.h"
  10 #include "content/child/scoped_child_process_reference.h"
  11 #include "content/child/shared_worker_devtools_agent.h"
  12 #include "content/child/webmessageportchannel_impl.h"
  13 #include "content/common/worker_messages.h"
  14 #include "content/renderer/render_thread_impl.h"
  15 #include "ipc/ipc_message_macros.h"
  16 #include "third_party/WebKit/public/web/WebSharedWorker.h"
  17 #include "third_party/WebKit/public/web/WebSharedWorkerClient.h"
  18
  19 namespace content {
  20
  21 namespace {
  22
  23 class SharedWorkerWebApplicationCacheHostImpl
  24     : public WebApplicationCacheHostImpl {
  25  public:
  26   SharedWorkerWebApplicationCacheHostImpl(
  27       blink::WebApplicationCacheHostClient* client)
  28       : WebApplicationCacheHostImpl(client,
  29                                     RenderThreadImpl::current()
  30                                         ->appcache_dispatcher()
  31                                         ->backend_proxy()) {}
  32
  33   // Main resource loading is different for workers. The main resource is
  34   // loaded by the worker using WorkerScriptLoader.
  35   // These overrides are stubbed out.
  36   virtual void willStartMainResourceRequest(
  37       blink::WebURLRequest&,
  38       const blink::WebApplicationCacheHost*) {}
  39   virtual void didReceiveResponseForMainResource(const blink::WebURLResponse&) {
  40   }
  41   virtual void didReceiveDataForMainResource(const char* data, int len) {}
  42   virtual void didFinishLoadingMainResource(bool success) {}
  43
  44   // Cache selection is also different for workers. We know at construction
  45   // time what cache to select and do so then.
  46   // These overrides are stubbed out.
  47   virtual void selectCacheWithoutManifest() {}
  48   virtual bool selectCacheWithManifest(const blink::WebURL& manifestURL) {
  49     return true;
  50   }
  51 };
  52 }
  53
  54 EmbeddedSharedWorkerStub::EmbeddedSharedWorkerStub(
  55     const GURL& url,
  56     const base::string16& name,
  57     const base::string16& content_security_policy,
  58     blink::WebContentSecurityPolicyType security_policy_type,
  59     bool pause_on_start,
  60     int route_id)
  61     : route_id_(route_id), name_(name), runing_(false), url_(url) {
  62   RenderThreadImpl::current()->AddEmbeddedWorkerRoute(route_id_, this);
  63   impl_ = blink::WebSharedWorker::create(this);
  64   if (pause_on_start) {
  65     // Pause worker context when it starts and wait until either DevTools client
  66     // is attached or explicit resume notification is received.
  67     impl_->pauseWorkerContextOnStart();
  68   }
  69   worker_devtools_agent_.reset(
  70       new SharedWorkerDevToolsAgent(route_id, impl_));
  71   impl_->startWorkerContext(url, name_,
  72                             content_security_policy, security_policy_type);
  73 }
  74
  75 EmbeddedSharedWorkerStub::~EmbeddedSharedWorkerStub() {
  76   RenderThreadImpl::current()->RemoveEmbeddedWorkerRoute(route_id_);
  77 }
  78
  79 bool EmbeddedSharedWorkerStub::OnMessageReceived(
  80     const IPC::Message& message) {
  81   if (worker_devtools_agent_->OnMessageReceived(message))
  82     return true;
  83   bool handled = true;
  84   IPC_BEGIN_MESSAGE_MAP(EmbeddedSharedWorkerStub, message)
  85     IPC_MESSAGE_HANDLER(WorkerMsg_TerminateWorkerContext,
  86                         OnTerminateWorkerContext)
  87     IPC_MESSAGE_HANDLER(WorkerMsg_Connect, OnConnect)
  88     IPC_MESSAGE_UNHANDLED(handled = false)
  89   IPC_END_MESSAGE_MAP()
  90   return handled;
  91 }
  92
  93 void EmbeddedSharedWorkerStub::OnChannelError() {
  94   OnTerminateWorkerContext();
  95 }
  96
  97 void EmbeddedSharedWorkerStub::workerScriptLoaded() {
  98   Send(new WorkerHostMsg_WorkerScriptLoaded(route_id_));
  99   runing_ = true;
 100   // Process any pending connections.
 101   for (PendingChannelList::const_iterator iter = pending_channels_.begin();
 102        iter != pending_channels_.end();
 103        ++iter) {
 104     ConnectToChannel(*iter);
 105   }
 106   pending_channels_.clear();
 107 }
 108
 109 void EmbeddedSharedWorkerStub::workerScriptLoadFailed() {
 110   Send(new WorkerHostMsg_WorkerScriptLoadFailed(route_id_));
 111   for (PendingChannelList::const_iterator iter = pending_channels_.begin();
 112        iter != pending_channels_.end();
 113        ++iter) {
 114     blink::WebMessagePortChannel* channel = *iter;
 115     channel->destroy();
 116   }
 117   pending_channels_.clear();
 118   Shutdown();
 119 }
 120
 121 void EmbeddedSharedWorkerStub::workerContextClosed() {
 122   Send(new WorkerHostMsg_WorkerContextClosed(route_id_));
 123 }
 124
 125 void EmbeddedSharedWorkerStub::workerContextDestroyed() {
 126   Send(new WorkerHostMsg_WorkerContextDestroyed(route_id_));
 127   Shutdown();
 128 }
 129
 130 void EmbeddedSharedWorkerStub::selectAppCacheID(long long app_cache_id) {
 131   if (app_cache_host_) {
 132     // app_cache_host_ could become stale as it's owned by blink's
 133     // DocumentLoader. This method is assumed to be called while it's valid.
 134     app_cache_host_->backend()->SelectCacheForSharedWorker(
 135         app_cache_host_->host_id(), app_cache_id);
 136   }
 137 }
 138
 139 blink::WebNotificationPresenter*
 140 EmbeddedSharedWorkerStub::notificationPresenter() {
 141   // TODO(horo): delete this method if we have no plan to implement this.
 142   NOTREACHED();
 143   return NULL;
 144 }
 145
 146 blink::WebApplicationCacheHost*
 147 EmbeddedSharedWorkerStub::createApplicationCacheHost(
 148     blink::WebApplicationCacheHostClient* client) {
 149   app_cache_host_ = new SharedWorkerWebApplicationCacheHostImpl(client);
 150   return app_cache_host_;
 151 }
 152
 153 blink::WebWorkerPermissionClientProxy*
 154     EmbeddedSharedWorkerStub::createWorkerPermissionClientProxy(
 155     const blink::WebSecurityOrigin& origin) {
 156   // TODO(horo): implement this.
 157   return NULL;
 158 }
 159
 160 void EmbeddedSharedWorkerStub::dispatchDevToolsMessage(
 161       const blink::WebString& message) {
 162   worker_devtools_agent_->SendDevToolsMessage(message);
 163 }
 164
 165 void EmbeddedSharedWorkerStub::saveDevToolsAgentState(
 166       const blink::WebString& state) {
 167   worker_devtools_agent_->SaveDevToolsAgentState(state);
 168 }
 169
 170 void EmbeddedSharedWorkerStub::Shutdown() {
 171   delete this;
 172 }
 173
 174 bool EmbeddedSharedWorkerStub::Send(IPC::Message* message) {
 175   return RenderThreadImpl::current()->Send(message);
 176 }
 177
 178 void EmbeddedSharedWorkerStub::ConnectToChannel(
 179     WebMessagePortChannelImpl* channel) {
 180   impl_->connect(channel);
 181   Send(
 182       new WorkerHostMsg_WorkerConnected(channel->message_port_id(), route_id_));
 183 }
 184
 185 void EmbeddedSharedWorkerStub::OnConnect(int sent_message_port_id,
 186                                          int routing_id) {
 187   WebMessagePortChannelImpl* channel =
 188       new WebMessagePortChannelImpl(routing_id,
 189                                     sent_message_port_id,
 190                                     base::MessageLoopProxy::current().get());
 191   if (runing_) {
 192     ConnectToChannel(channel);
 193   } else {
 194     // If two documents try to load a SharedWorker at the same time, the
 195     // WorkerMsg_Connect for one of the documents can come in before the
 196     // worker is started. Just queue up the connect and deliver it once the
 197     // worker starts.
 198     pending_channels_.push_back(channel);
 199   }
 200 }
 201
 202 void EmbeddedSharedWorkerStub::OnTerminateWorkerContext() {
 203   runing_ = false;
 204   impl_->terminateWorkerContext();
 205 }
 206
 207 }  // namespace content