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// Copyright (c) 2009 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 WEBKIT_APPCACHE_APPCACHE_REQUEST_HANDLER_H_
#define WEBKIT_APPCACHE_APPCACHE_REQUEST_HANDLER_H_
#include "net/url_request/url_request.h"
#include "webkit/appcache/appcache_host.h"
class URLRequest;
class URLRequestJob;
namespace appcache {
class AppCacheURLRequestJob;
// An instance is created for each URLRequest. The instance survives all
// http transactions involved in the processing of its URLRequest, and is
// given the opportunity to hijack the request along the way. Callers
// should use AppCacheHost::CreateRequestHandler to manufacture instances
// that can retrieve resources for a particular host.
class AppCacheRequestHandler : public URLRequest::UserData,
public AppCacheHost::Observer,
public AppCacheStorage::Delegate {
public:
virtual ~AppCacheRequestHandler();
// These are called on each request intercept opportunity.
AppCacheURLRequestJob* MaybeLoadResource(URLRequest* request);
AppCacheURLRequestJob* MaybeLoadFallbackForRedirect(URLRequest* request,
const GURL& location);
AppCacheURLRequestJob* MaybeLoadFallbackForResponse(URLRequest* request);
void GetExtraResponseInfo(int64* cache_id, GURL* manifest_url);
private:
friend class AppCacheHost;
// Callers should use AppCacheHost::CreateRequestHandler.
AppCacheRequestHandler(AppCacheHost* host, bool is_main_resource);
// AppCacheHost::Observer override
virtual void OnDestructionImminent(AppCacheHost* host);
// Helpers to instruct a waiting job with what response to
// deliver for the request we're handling.
void DeliverAppCachedResponse(const AppCacheEntry& entry, int64 cache_id,
const GURL& manifest_url);
void DeliverNetworkResponse();
void DeliverErrorResponse();
// Helper to retrieve a pointer to the storage object.
AppCacheStorage* storage();
// Main-resource loading -------------------------------------
void MaybeLoadMainResource(URLRequest* request);
// AppCacheStorage::Delegate methods
virtual void OnMainResponseFound(
const GURL& url, const AppCacheEntry& entry,
const AppCacheEntry& fallback_entry,
int64 cache_id, const GURL& mainfest_url);
// Sub-resource loading -------------------------------------
void MaybeLoadSubResource(URLRequest* request);
void ContinueMaybeLoadSubResource();
// AppCacheHost::Observer override
virtual void OnCacheSelectionComplete(AppCacheHost* host);
// Data members -----------------------------------------------
// What host we're servicing a request for.
AppCacheHost* host_;
// Main vs subresource loads are somewhat different.
bool is_main_request_;
// Subresource requests wait until after cache selection completes.
bool is_waiting_for_cache_selection_;
// Info about the type of response we found for delivery.
// These are relevant for both main and subresource requests.
AppCacheEntry found_entry_;
AppCacheEntry found_fallback_entry_;
int64 found_cache_id_;
GURL found_manifest_url_;
bool found_network_namespace_;
// The job we use to deliver a response.
scoped_refptr<AppCacheURLRequestJob> job_;
friend class AppCacheRequestHandlerTest;
DISALLOW_COPY_AND_ASSIGN(AppCacheRequestHandler);
};
} // namespace appcache
#endif // WEBKIT_APPCACHE_APPCACHE_REQUEST_HANDLER_H_
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