content/browser/service_worker/service_worker_fetch_dispatcher.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/browser/service_worker/service_worker_fetch_dispatcher.h"
   6
   7 #include "base/bind.h"
   8 #include "base/trace_event/trace_event.h"
   9 #include "content/browser/service_worker/service_worker_version.h"
  10
  11 namespace content {
  12
  13 ServiceWorkerFetchDispatcher::ServiceWorkerFetchDispatcher(
  14     scoped_ptr<ServiceWorkerFetchRequest> request,
  15     ServiceWorkerVersion* version,
  16     const base::Closure& prepare_callback,
  17     const FetchCallback& fetch_callback)
  18     : version_(version),
  19       prepare_callback_(prepare_callback),
  20       fetch_callback_(fetch_callback),
  21       request_(request.Pass()),
  22       weak_factory_(this) {
  23 }
  24
  25 ServiceWorkerFetchDispatcher::~ServiceWorkerFetchDispatcher() {}
  26
  27 void ServiceWorkerFetchDispatcher::Run() {
  28   DCHECK(version_->status() == ServiceWorkerVersion::ACTIVATING ||
  29          version_->status() == ServiceWorkerVersion::ACTIVATED)
  30       << version_->status();
  31
  32   if (version_->status() == ServiceWorkerVersion::ACTIVATING) {
  33     version_->RegisterStatusChangeCallback(
  34         base::Bind(&ServiceWorkerFetchDispatcher::DidWaitActivation,
  35                    weak_factory_.GetWeakPtr()));
  36     return;
  37   }
  38   DispatchFetchEvent();
  39 }
  40
  41 void ServiceWorkerFetchDispatcher::DidWaitActivation() {
  42   if (version_->status() != ServiceWorkerVersion::ACTIVATED) {
  43     DCHECK_EQ(ServiceWorkerVersion::INSTALLED, version_->status());
  44     DidFailActivation();
  45     return;
  46   }
  47   DispatchFetchEvent();
  48 }
  49
  50 void ServiceWorkerFetchDispatcher::DidFailActivation() {
  51   // The previous activation seems to have failed, abort the step
  52   // with activate error. (The error should be separately reported
  53   // to the associated documents and association must be dropped
  54   // at this point)
  55   DidFinish(SERVICE_WORKER_ERROR_ACTIVATE_WORKER_FAILED,
  56             SERVICE_WORKER_FETCH_EVENT_RESULT_FALLBACK,
  57             ServiceWorkerResponse());
  58 }
  59
  60 void ServiceWorkerFetchDispatcher::DispatchFetchEvent() {
  61   TRACE_EVENT_ASYNC_BEGIN0(
  62       "ServiceWorker",
  63       "ServiceWorkerFetchDispatcher::DispatchFetchEvent",
  64       request_.get());
  65   version_->DispatchFetchEvent(
  66       *request_.get(),
  67       base::Bind(&ServiceWorkerFetchDispatcher::DidPrepare,
  68                  weak_factory_.GetWeakPtr()),
  69       base::Bind(&ServiceWorkerFetchDispatcher::DidFinish,
  70                  weak_factory_.GetWeakPtr()));
  71 }
  72
  73 void ServiceWorkerFetchDispatcher::DidPrepare() {
  74   DCHECK(!prepare_callback_.is_null());
  75   base::Closure prepare_callback = prepare_callback_;
  76   prepare_callback.Run();
  77 }
  78
  79 void ServiceWorkerFetchDispatcher::DidFinish(
  80     ServiceWorkerStatusCode status,
  81     ServiceWorkerFetchEventResult fetch_result,
  82     const ServiceWorkerResponse& response) {
  83   TRACE_EVENT_ASYNC_END0(
  84       "ServiceWorker",
  85       "ServiceWorkerFetchDispatcher::DispatchFetchEvent",
  86       request_.get());
  87   DCHECK(!fetch_callback_.is_null());
  88   FetchCallback fetch_callback = fetch_callback_;
  89   fetch_callback.Run(status, fetch_result, response);
  90 }
  91
  92 }  // namespace content