/*
* Copyright (C) 2009, 2011 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
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*/
#ifndef WebURLLoader_h
#define WebURLLoader_h
#include "WebCommon.h"
#include "WebURLRequest.h"
namespace blink {
class WebData;
class WebThreadedDataReceiver;
class WebURLLoaderClient;
class WebURLResponse;
struct WebURLError;
class WebURLLoader {
public:
// The WebURLLoader may be deleted in a call to its client.
virtual ~WebURLLoader() {}
// Load the request synchronously, returning results directly to the
// caller upon completion. There is no mechanism to interrupt a
// synchronous load!!
virtual void loadSynchronously(const WebURLRequest&,
WebURLResponse&, WebURLError&, WebData& data) = 0;
// Load the request asynchronously, sending notifications to the given
// client. The client will receive no further notifications if the
// loader is disposed before it completes its work.
virtual void loadAsynchronously(const WebURLRequest&,
WebURLLoaderClient*) = 0;
// Cancels an asynchronous load. This will appear as a load error to
// the client.
virtual void cancel() = 0;
// Suspends/resumes an asynchronous load.
virtual void setDefersLoading(bool) = 0;
// Notifies the loader that the priority of a WebURLRequest has changed from
// its previous value. For example, a preload request starts with low
// priority, but may increase when the resource is needed for rendering.
virtual void didChangePriority(WebURLRequest::Priority newPriority) { }
virtual void didChangePriority(WebURLRequest::Priority newPriority, int intraPriorityValue) { didChangePriority(newPriority); }
// Try to attach the given data receiver which from this point will receive data
// on its thread (provided by WebThreadedDataReceiver::backgroundThread(),
// rather than the WebURLLoaderClient. If successful, ownership
// of the data receiver is assumed by the WebURLLoader and the receiver should
// be deleted on the main thread when no longer needed.
virtual bool attachThreadedDataReceiver(WebThreadedDataReceiver*) { return false; }
};
} // namespace blink
#endif