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// Copyright 2013 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 CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_WRITE_FROM_URL_OPERATION_H_
#define CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_WRITE_FROM_URL_OPERATION_H_
#include "chrome/browser/extensions/api/image_writer_private/operation.h"
#include "net/url_request/url_fetcher_delegate.h"
#include "url/gurl.h"
namespace net {
class URLFetcher;
class URLRequestContextGetter;
} // namespace net
namespace extensions {
namespace image_writer {
class OperationManager;
// Encapsulates a write of an image accessed via URL.
class WriteFromUrlOperation : public Operation, public net::URLFetcherDelegate {
public:
WriteFromUrlOperation(base::WeakPtr<OperationManager> manager,
const ExtensionId& extension_id,
net::URLRequestContextGetter* request_context,
GURL url,
const std::string& hash,
const std::string& storage_unit_id);
virtual void StartImpl() OVERRIDE;
protected:
virtual ~WriteFromUrlOperation();
// Sets the image_path to the correct location to download to.
void GetDownloadTarget(const base::Closure& continuation);
// Downloads the |url| to the currently configured |image_path|. Should not
// be called without calling |GetDownloadTarget| first.
void Download(const base::Closure& continuation);
// Verifies the download matches |hash|. If the hash is empty, this stage is
// skipped.
void VerifyDownload(const base::Closure& continuation);
private:
// Destroys the URLFetcher. The URLFetcher needs to be destroyed on the same
// thread it was created on. The Operation may be deleted on the UI thread
// and so we must first delete the URLFetcher on the FILE thread.
void DestroyUrlFetcher();
// URLFetcherDelegate implementation.
virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
virtual void OnURLFetchDownloadProgress(const net::URLFetcher* source,
int64 current,
int64 total) OVERRIDE;
virtual void OnURLFetchUploadProgress(const net::URLFetcher* source,
int64 current,
int64 total) OVERRIDE;
void VerifyDownloadCompare(const base::Closure& continuation,
const std::string& download_hash);
void VerifyDownloadComplete(const base::Closure& continuation);
// Arguments
net::URLRequestContextGetter* request_context_;
GURL url_;
const std::string hash_;
// Local state
scoped_ptr<net::URLFetcher> url_fetcher_;
base::Closure download_continuation_;
};
} // namespace image_writer
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_WRITE_FROM_URL_OPERATION_H_
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