Implement ManifestFetcher, helper to fetch Web Manifests.

content/renderer/fetchers/resource_fetcher_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/fetchers/resource_fetcher_impl.h"
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "third_party/WebKit/public/platform/Platform.h"
@@ skipping 17 matching lines @@
 using blink::WebURLResponse;
 
 namespace content {
 
 // static
 ResourceFetcher* ResourceFetcher::Create(const GURL& url) {
   return new ResourceFetcherImpl(url);
 }
 
 ResourceFetcherImpl::ResourceFetcherImpl(const GURL& url)
-    : request_(url),
-      completed_(false) {
+    : request_(url) {
 }
 
 ResourceFetcherImpl::~ResourceFetcherImpl() {
-  if (!completed_ && loader_)
-    loader_->cancel();
+  if (!completed() && loader_)
+    Cancel();
 }
 
 void ResourceFetcherImpl::SetMethod(const std::string& method) {
   DCHECK(!request_.isNull());
   DCHECK(!loader_);
 
   request_.setHTTPMethod(blink::WebString::fromUTF8(method));
 }
 
 void ResourceFetcherImpl::SetBody(const std::string& body) {
@@ skipping 23 matching lines @@
   }
 }
 
 void ResourceFetcherImpl::Start(WebFrame* frame,
                                 WebURLRequest::RequestContext request_context,
                                 WebURLRequest::FrameType frame_type,
                                 const Callback& callback) {
   DCHECK(!loader_);
   DCHECK(!request_.isNull());
   DCHECK(callback_.is_null());
-  DCHECK(!completed_);
+  DCHECK(!completed());
   if (!request_.httpBody().isNull())
     DCHECK_NE("GET", request_.httpMethod().utf8()) << "GETs can't have bodies.";
 
   callback_ = callback;
 
   request_.setRequestContext(request_context);
   request_.setFrameType(frame_type);
   request_.setFirstPartyForCookies(frame->document().firstPartyForCookies());
   frame->dispatchWillSendRequest(request_);
   loader_.reset(blink::Platform::current()->createURLLoader());
   loader_->loadAsynchronously(request_, this);
 
   // No need to hold on to the request.
   request_.reset();
 }
 
 void ResourceFetcherImpl::SetTimeout(const base::TimeDelta& timeout) {
   DCHECK(loader_);
-  DCHECK(!completed_);
+  DCHECK(!completed());
 
-  timeout_timer_.Start(FROM_HERE, timeout, this,
-                       &ResourceFetcherImpl::TimeoutFired);
+  timeout_timer_.Start(FROM_HERE, timeout, this, &ResourceFetcherImpl::Cancel);
 }
 
-void ResourceFetcherImpl::RunCallback(const WebURLResponse& response,
-                                      const std::string& data) {
-  completed_ = true;
+void ResourceFetcherImpl::OnLoadComplete() {
   timeout_timer_.Stop();
   if (callback_.is_null())
     return;
 
   // Take a reference to the callback as running the callback may lead to our
   // destruction.
   Callback callback = callback_;
-  callback.Run(response, data);
+  callback.Run(status() == LOAD_FAILED ? blink::WebURLResponse() : response(),
+               status() == LOAD_FAILED ? std::string() : data());
 }
 
-void ResourceFetcherImpl::TimeoutFired() {
-  DCHECK(!completed_);
+void ResourceFetcherImpl::Cancel() {
   loader_->cancel();
-  RunCallback(WebURLResponse(), std::string());
-}
-
-/////////////////////////////////////////////////////////////////////////////
-// WebURLLoaderClient methods
-
-void ResourceFetcherImpl::willSendRequest(
-    WebURLLoader* loader, WebURLRequest& new_request,
-    const WebURLResponse& redirect_response) {
-}
-
-void ResourceFetcherImpl::didSendData(
-    WebURLLoader* loader, unsigned long long bytes_sent,
-    unsigned long long total_bytes_to_be_sent) {
-}
-
-void ResourceFetcherImpl::didReceiveResponse(
-    WebURLLoader* loader, const WebURLResponse& response) {
-  DCHECK(!completed_);
-  response_ = response;
-}
-
-void ResourceFetcherImpl::didReceiveData(
-    WebURLLoader* loader, const char* data, int data_length,
-    int encoded_data_length) {
-  DCHECK(!completed_);
-  DCHECK(data_length > 0);
-
-  data_.append(data, data_length);
-}
-
-void ResourceFetcherImpl::didReceiveCachedMetadata(
-    WebURLLoader* loader, const char* data, int data_length) {
-  DCHECK(!completed_);
-  DCHECK(data_length > 0);
-
-  metadata_.assign(data, data_length);
-}
-
-void ResourceFetcherImpl::didFinishLoading(
-    WebURLLoader* loader, double finishTime,
-    int64_t total_encoded_data_length) {
-  DCHECK(!completed_);
-
-  RunCallback(response_, data_);
-}
-
-void ResourceFetcherImpl::didFail(WebURLLoader* loader,
-                                  const WebURLError& error) {
-  DCHECK(!completed_);
-
-  // Go ahead and tell our delegate that we're done.
-  RunCallback(WebURLResponse(), std::string());
+  WebURLLoaderClientImpl::Cancel();
 }
 
 }  // namespace content