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// Copyright 2014 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.
#ifndef CONTENT_RENDERER_FETCHERS_MANIFEST_FETCHER_H_
#define CONTENT_RENDERER_FETCHERS_MANIFEST_FETCHER_H_
#include <string>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/memory/scoped_ptr.h"
#include "content/common/content_export.h"
#include "third_party/WebKit/public/platform/WebURLResponse.h"
class GURL;
namespace blink {
class WebFrame;
}
namespace content {
class ResourceFetcher;
// Helper class to download a Web Manifest. When an instance is created, the
// caller need to call Start() and wait for the passed callback to be executed.
// If the fetch fails, the callback will be called with two empty objects.
class CONTENT_EXPORT ManifestFetcher {
public:
// This will be called asynchronously after the URL has been fetched,
// successfully or not. If there is a failure, response and data will both be
// empty. |response| and |data| are both valid until the URLFetcher instance
// is destroyed.
typedef base::Callback<void(const blink::WebURLResponse& response,
const std::string& data)> Callback;
explicit ManifestFetcher(const GURL& url);
virtual ~ManifestFetcher();
void Start(blink::WebFrame* frame,
bool use_credentials,
const Callback& callback);
void Cancel();
private:
void OnLoadComplete(const blink::WebURLResponse& response,
const std::string& data);
bool completed_;
Callback callback_;
scoped_ptr<ResourceFetcher> fetcher_;
DISALLOW_COPY_AND_ASSIGN(ManifestFetcher);
};
} // namespace content
#endif // CONTENT_RENDERER_FETCHERS_MANIFEST_FETCHER_H_
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