Implement ManifestFetcher, helper to fetch Web Manifests.

content/renderer/fetchers/web_url_loader_client_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/web_url_loader_client_impl.h"
+
+#include "base/logging.h"
+#include "third_party/WebKit/public/platform/WebURLError.h"
+#include "third_party/WebKit/public/platform/WebURLLoader.h"
+#include "third_party/WebKit/public/platform/WebURLResponse.h"
+
+namespace content {
+
+WebURLLoaderClientImpl::WebURLLoaderClientImpl()
+    : completed_(false)
+    , status_(LOADING) {
+}
+
+WebURLLoaderClientImpl::~WebURLLoaderClientImpl() {
+}
+
+void WebURLLoaderClientImpl::didReceiveResponse(
+    blink::WebURLLoader* loader, const blink::WebURLResponse& response) {
+  DCHECK(!completed_);
+  response_ = response;
+}
+
+void WebURLLoaderClientImpl::didReceiveData(
+    blink::WebURLLoader* loader,
+    const char* data,
+    int data_length,
+    int encoded_data_length) {
+  DCHECK(!completed_);
+  DCHECK(data_length > 0);
+
+  data_.append(data, data_length);
+}
+
+void WebURLLoaderClientImpl::didReceiveCachedMetadata(
+    blink::WebURLLoader* loader,
+    const char* data,
+    int data_length) {
+  DCHECK(!completed_);
+  DCHECK(data_length > 0);
+
+  metadata_.assign(data, data_length);
+}
+
+void WebURLLoaderClientImpl::didFinishLoading(
+    blink::WebURLLoader* loader,
+    double finishTime,
+    int64_t total_encoded_data_length) {
+  OnLoadCompleteInternal(LOAD_SUCCEEDED);
+}
+
+void WebURLLoaderClientImpl::didFail(blink::WebURLLoader* loader,
+                                     const blink::WebURLError& error) {
+  OnLoadCompleteInternal(LOAD_FAILED);
+}
+
+void WebURLLoaderClientImpl::Cancel() {
+  OnLoadCompleteInternal(LOAD_FAILED);
+}
+
+void WebURLLoaderClientImpl::OnLoadCompleteInternal(LoadStatus status) {
+  DCHECK(!completed_);
+  DCHECK(status_ == LOADING);
+
+  completed_ = true;
+  status_ = status;
+
+  OnLoadComplete();
+}
+
+}  // namespace content