// 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.

#ifndef WEBKIT_GLUE_ALT_404_PAGE_RESOURCE_HANDLE_CLIENT_H__
#define WEBKIT_GLUE_ALT_404_PAGE_RESOURCE_HANDLE_CLIENT_H__

#include <string>

#include "base/basictypes.h"
#include "base/scoped_ptr.h"

#include "webkit/glue/resource_fetcher.h"

class WebFrameLoaderClient;
class WebCore::DocumentLoader;
class WebCore::Frame;
class WebCore::ResourceResponse;

// ResourceHandleClient implementation that is used for downloading alternate
// 404 pages. Once downloading is done (or fails), the WebFrameLoaderClient is
// notified.
class Alt404PageResourceFetcher : public ResourceFetcher::Delegate {
 public:
  Alt404PageResourceFetcher(WebFrameLoaderClient* webframeloaderclient,
                            WebCore::Frame* frame,
                            WebCore::DocumentLoader* doc_loader,
                            const GURL& url);

  virtual void OnURLFetchComplete(const WebCore::ResourceResponse& response,
                                  const std::string& data);

  // Stop any pending loads.
  void Cancel() {
    if (fetcher_.get())
      fetcher_->Cancel();
  }

 private:
  // Does the actual fetching.
  scoped_ptr<ResourceFetcherWithTimeout> fetcher_;

  // References to our owner which we call when finished.
  WebFrameLoaderClient* webframeloaderclient_;

  // The DocumentLoader associated with this load.  If there's an error
  // talking with the alt 404 page server, we need this to complete the
  // original load.
  RefPtr<WebCore::DocumentLoader> doc_loader_;

  DISALLOW_EVIL_CONSTRUCTORS(Alt404PageResourceFetcher);
};

#endif  // WEBKIT_GLUE_ALT_404_PAGE_RESOURCE_HANDLE_CLIENT_H__