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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// A wrapper around ResourceHandle and ResourceHandleClient that simplifies
// the download of an HTTP object. The interface is modeled after URLFetcher
// in the /chrome/browser.
//
// ResourceFetcher::Delegate::OnURLFetchComplete will be called async after
// the ResourceFetcher object is created.
#ifndef WEBKIT_GLUE_RESOURCE_FETCHER_H__
#define WEBKIT_GLUE_RESOURCE_FETCHER_H__
#include <string>
#include "base/basictypes.h"
#include "base/scoped_ptr.h"
#include "googleurl/src/gurl.h"
#pragma warning(push, 0)
#include "Frame.h"
#include "Timer.h"
#include "ResourceHandleClient.h"
#include "ResourceResponse.h"
#pragma warning(pop)
class GURL;
class WebCore::ResourceHandle;
class ResourceFetcher : public WebCore::ResourceHandleClient {
public:
class Delegate {
public:
// This will be called when 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.
virtual void OnURLFetchComplete(const WebCore::ResourceResponse& response,
const std::string& data) = 0;
};
// We need a frame and frame loader to make requests.
ResourceFetcher(const GURL& url, WebCore::Frame* frame, Delegate* d);
~ResourceFetcher();
// Stop the request and don't call the callback.
void Cancel();
bool completed() { return completed_; }
// ResourceHandleClient methods
virtual void didReceiveResponse(WebCore::ResourceHandle* resource_handle,
const WebCore::ResourceResponse& response);
virtual void didReceiveData(WebCore::ResourceHandle* resource_handle,
const char* data, int length, int total_length);
virtual void didFinishLoading(WebCore::ResourceHandle* resource_handle);
virtual void didFail(WebCore::ResourceHandle* resource_handle,
const WebCore::ResourceError& error);
protected:
// The parent ResourceHandle
RefPtr<WebCore::ResourceHandle> loader_;
// URL we're fetching
GURL url_;
// Callback when we're done
Delegate* delegate_;
// A copy of the original resource response
WebCore::ResourceResponse response_;
// Set to true once the request is compelte.
bool completed_;
private:
// If we fail to start the request, we still want to finish async.
typedef WebCore::Timer<ResourceFetcher> StartFailedTimer;
// Start the actual download.
void Start(WebCore::Frame* frame);
// Callback function if Start fails.
void StartFailed(StartFailedTimer* timer);
// Timer for calling StartFailed async.
scoped_ptr<StartFailedTimer> start_failed_timer_;
// Buffer to hold the content from the server.
std::string data_;
};
/////////////////////////////////////////////////////////////////////////////
// A resource fetcher with a timeout
class ResourceFetcherWithTimeout : public ResourceFetcher {
public:
ResourceFetcherWithTimeout(const GURL& url, WebCore::Frame* frame, double
timeout_secs, Delegate* d);
virtual ~ResourceFetcherWithTimeout() {}
private:
typedef WebCore::Timer<ResourceFetcherWithTimeout> FetchTimer;
// Callback for timer that limits how long we wait for the alternate error
// page server. If this timer fires and the request hasn't completed, we
// kill the request.
void TimeoutFired(FetchTimer* timer);
// Limit how long we wait for the alternate error page server.
scoped_ptr<FetchTimer> timeout_timer_;
};
#endif // WEBKIT_GLUE_RESOURCE_FETCHER_H__
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