src/content/renderer/service_worker/embedded_worker_dispatcher.cc

   1 // Copyright 2013 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/service_worker/embedded_worker_dispatcher.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/strings/string16.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "content/child/child_process.h"
  11 #include "content/child/scoped_child_process_reference.h"
  12 #include "content/child/thread_safe_sender.h"
  13 #include "content/child/worker_task_runner.h"
  14 #include "content/common/devtools_messages.h"
  15 #include "content/common/service_worker/embedded_worker_messages.h"
  16 #include "content/public/common/content_client.h"
  17 #include "content/renderer/render_thread_impl.h"
  18 #include "content/renderer/service_worker/embedded_worker_context_client.h"
  19 #include "content/renderer/service_worker/embedded_worker_devtools_agent.h"
  20 #include "third_party/WebKit/public/platform/WebString.h"
  21 #include "third_party/WebKit/public/platform/WebURL.h"
  22 #include "third_party/WebKit/public/web/WebEmbeddedWorker.h"
  23 #include "third_party/WebKit/public/web/WebEmbeddedWorkerStartData.h"
  24
  25 namespace content {
  26
  27 // A thin wrapper of WebEmbeddedWorker which also adds and releases process
  28 // references automatically.
  29 class EmbeddedWorkerDispatcher::WorkerWrapper {
  30  public:
  31   WorkerWrapper(blink::WebEmbeddedWorker* worker, int devtools_agent_route_id)
  32       : worker_(worker),
  33         dev_tools_agent_(
  34             new EmbeddedWorkerDevToolsAgent(worker, devtools_agent_route_id)) {}
  35   ~WorkerWrapper() {}
  36
  37   blink::WebEmbeddedWorker* worker() { return worker_.get(); }
  38
  39  private:
  40   ScopedChildProcessReference process_ref_;
  41   scoped_ptr<blink::WebEmbeddedWorker> worker_;
  42   scoped_ptr<EmbeddedWorkerDevToolsAgent> dev_tools_agent_;
  43 };
  44
  45 EmbeddedWorkerDispatcher::EmbeddedWorkerDispatcher() : weak_factory_(this) {}
  46
  47 EmbeddedWorkerDispatcher::~EmbeddedWorkerDispatcher() {}
  48
  49 bool EmbeddedWorkerDispatcher::OnMessageReceived(
  50     const IPC::Message& message) {
  51   bool handled = true;
  52   IPC_BEGIN_MESSAGE_MAP(EmbeddedWorkerDispatcher, message)
  53     IPC_MESSAGE_HANDLER(EmbeddedWorkerMsg_StartWorker, OnStartWorker)
  54     IPC_MESSAGE_HANDLER(EmbeddedWorkerMsg_StopWorker, OnStopWorker)
  55     IPC_MESSAGE_UNHANDLED(handled = false)
  56   IPC_END_MESSAGE_MAP()
  57   return handled;
  58 }
  59
  60 void EmbeddedWorkerDispatcher::WorkerContextDestroyed(
  61     int embedded_worker_id) {
  62   RenderThreadImpl::current()->thread_safe_sender()->Send(
  63       new EmbeddedWorkerHostMsg_WorkerStopped(embedded_worker_id));
  64   workers_.Remove(embedded_worker_id);
  65 }
  66
  67 void EmbeddedWorkerDispatcher::OnStartWorker(
  68     const EmbeddedWorkerMsg_StartWorker_Params& params) {
  69   DCHECK(!workers_.Lookup(params.embedded_worker_id));
  70   RenderThread::Get()->EnsureWebKitInitialized();
  71   scoped_ptr<WorkerWrapper> wrapper(
  72       new WorkerWrapper(blink::WebEmbeddedWorker::create(
  73                             new EmbeddedWorkerContextClient(
  74                                 params.embedded_worker_id,
  75                                 params.service_worker_version_id,
  76                                 params.scope,
  77                                 params.script_url,
  78                                 params.worker_devtools_agent_route_id),
  79                             NULL),
  80                         params.worker_devtools_agent_route_id));
  81
  82   blink::WebEmbeddedWorkerStartData start_data;
  83   start_data.scriptURL = params.script_url;
  84   start_data.userAgent = base::UTF8ToUTF16(GetContentClient()->GetUserAgent());
  85   start_data.startMode = blink::WebEmbeddedWorkerStartModeDontPauseOnStart;
  86
  87   wrapper->worker()->startWorkerContext(start_data);
  88   workers_.AddWithID(wrapper.release(), params.embedded_worker_id);
  89 }
  90
  91 void EmbeddedWorkerDispatcher::OnStopWorker(int embedded_worker_id) {
  92   WorkerWrapper* wrapper = workers_.Lookup(embedded_worker_id);
  93   if (!wrapper) {
  94     LOG(WARNING) << "Got OnStopWorker for nonexistent worker";
  95     return;
  96   }
  97
  98   // This should eventually call WorkerContextDestroyed. (We may need to post
  99   // a delayed task to forcibly abort the worker context if we find it
 100   // necessary)
 101   wrapper->worker()->terminateWorkerContext();
 102 }
 103
 104 }  // namespace content