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// Copyright (c) 2011 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_RENDERER_HOST_OFFLINE_RESOURCE_HANDLER_H_
#define CHROME_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_HANDLER_H_
#pragma once
#include <string>
#include "base/memory/ref_counted.h"
#include "chrome/browser/chromeos/offline/offline_load_page.h"
#include "content/browser/renderer_host/resource_handler.h"
#include "net/base/completion_callback.h"
class ChromeAppCacheService;
class ResourceDispatcherHost;
namespace net {
class URLRequest;
} // namespace net
// Used to show an offline interstitial page when the network is not available.
class OfflineResourceHandler : public ResourceHandler {
public:
OfflineResourceHandler(ResourceHandler* handler,
int host_id,
int render_view_id,
ResourceDispatcherHost* rdh,
net::URLRequest* request,
ChromeAppCacheService* appcache_service);
virtual ~OfflineResourceHandler();
// ResourceHandler implementation:
virtual bool OnUploadProgress(int request_id, uint64 position,
uint64 size) OVERRIDE;
virtual bool OnRequestRedirected(int request_id, const GURL& new_url,
content::ResourceResponse* response, bool* defer) OVERRIDE;
virtual bool OnResponseStarted(int request_id,
content::ResourceResponse* response) OVERRIDE;
virtual bool OnWillStart(int request_id, const GURL& url,
bool* defer) OVERRIDE;
virtual bool OnWillRead(int request_id, net::IOBuffer** buf, int* buf_size,
int min_size) OVERRIDE;
virtual bool OnReadCompleted(int request_id, int* bytes_read) OVERRIDE;
virtual bool OnResponseCompleted(int request_id,
const net::URLRequestStatus& status,
const std::string& security_info) OVERRIDE;
virtual void OnRequestClosed() OVERRIDE;
// OfflineLoadPage callback.
void OnBlockingPageComplete(bool proceed);
private:
// Erase the state associated with a deferred load request.
void ClearRequestInfo();
bool IsRemote(const GURL& url) const;
// Resume the deferred load request.
void Resume();
// True if chrome should show the offline page.
bool ShouldShowOfflinePage(const GURL& url) const;
// Shows the offline interstitial page on the UI thread.
void ShowOfflinePage();
// A callback to tell if an appcache exists.
void OnCanHandleOfflineComplete(int rv);
scoped_refptr<ResourceHandler> next_handler_;
int process_host_id_;
int render_view_id_;
ResourceDispatcherHost* rdh_;
net::URLRequest* request_;
ChromeAppCacheService* const appcache_service_;
// The state for deferred load quest.
int deferred_request_id_;
GURL deferred_url_;
net::CancelableCompletionCallback appcache_completion_callback_;
DISALLOW_COPY_AND_ASSIGN(OfflineResourceHandler);
};
#endif // CHROME_BROWSER_RENDERER_HOST_OFFLINE_RESOURCE_HANDLER_H_
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