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// Copyright 2014 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 CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
#define CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
#include "base/memory/singleton.h"
#include "content/common/content_export.h"
#include "content/public/common/resource_type.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_interceptor.h"
#include "url/gurl.h"
namespace content {
class AppCacheRequestHandler;
class AppCacheServiceImpl;
// An interceptor to hijack requests and potentially service them out of
// the appcache.
class CONTENT_EXPORT AppCacheInterceptor
: public net::URLRequest::Interceptor {
public:
// Registers a singleton instance with the net library.
// Should be called early in the IO thread prior to initiating requests.
static void EnsureRegistered() {
CHECK(GetInstance());
}
// Must be called to make a request eligible for retrieval from an appcache.
static void SetExtraRequestInfo(net::URLRequest* request,
AppCacheServiceImpl* service,
int process_id,
int host_id,
ResourceType resource_type);
// May be called after response headers are complete to retrieve extra
// info about the response.
static void GetExtraResponseInfo(net::URLRequest* request,
int64* cache_id,
GURL* manifest_url);
// Methods to support cross site navigations.
static void PrepareForCrossSiteTransfer(net::URLRequest* request,
int old_process_id);
static void CompleteCrossSiteTransfer(net::URLRequest* request,
int new_process_id,
int new_host_id);
static AppCacheInterceptor* GetInstance();
// The appcache system employs two different interceptors. The singleton
// AppCacheInterceptor derives URLRequest::Interceptor and is used
// to hijack request handling upon receipt of the response or a redirect.
// A separate URLRequestInterceptor derivative is used to hijack handling
// at the very start of request processing. The separate handler allows the
// content lib to order its collection of net::URLRequestInterceptors.
static scoped_ptr<net::URLRequestInterceptor> CreateStartInterceptor();
protected:
// Override from net::URLRequest::Interceptor:
net::URLRequestJob* MaybeIntercept(
net::URLRequest* request,
net::NetworkDelegate* network_delegate) override;
net::URLRequestJob* MaybeInterceptResponse(
net::URLRequest* request,
net::NetworkDelegate* network_delegate) override;
net::URLRequestJob* MaybeInterceptRedirect(
net::URLRequest* request,
net::NetworkDelegate* network_delegate,
const GURL& location) override;
private:
friend struct DefaultSingletonTraits<AppCacheInterceptor>;
class StartInterceptor;
AppCacheInterceptor();
~AppCacheInterceptor() override;
static void SetHandler(net::URLRequest* request,
AppCacheRequestHandler* handler);
static AppCacheRequestHandler* GetHandler(net::URLRequest* request);
DISALLOW_COPY_AND_ASSIGN(AppCacheInterceptor);
};
} // namespace content
#endif // CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
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