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// Copyright 2015 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 EXTENSIONS_BROWSER_EXTENSION_REQUEST_LIMITING_THROTTLE_H_
#define EXTENSIONS_BROWSER_EXTENSION_REQUEST_LIMITING_THROTTLE_H_
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "content/public/browser/resource_throttle.h"
namespace net {
struct RedirectInfo;
class URLRequest;
}
namespace extensions {
class ExtensionThrottleEntryInterface;
class ExtensionThrottleManager;
// This class monitors requests issued by extensions and throttles the request
// if there are too many requests made within a short time to urls with the same
// scheme, host, port and path. For the exact criteria for throttling, please
// also see extension_throttle_manager.cc.
class ExtensionRequestLimitingThrottle : public content::ResourceThrottle {
public:
ExtensionRequestLimitingThrottle(const net::URLRequest* request,
ExtensionThrottleManager* manager);
~ExtensionRequestLimitingThrottle() override;
// content::ResourceThrottle implementation (called on IO thread):
void WillStartRequest(bool* defer) override;
void WillRedirectRequest(const net::RedirectInfo& redirect_info,
bool* defer) override;
void WillProcessResponse(bool* defer) override;
const char* GetNameForLogging() const override;
private:
const net::URLRequest* request_;
ExtensionThrottleManager* manager_;
// This is used to supervise traffic and enforce exponential back-off.
scoped_refptr<ExtensionThrottleEntryInterface> throttling_entry_;
DISALLOW_COPY_AND_ASSIGN(ExtensionRequestLimitingThrottle);
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_EXTENSION_REQUEST_LIMITING_THROTTLE_H_
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