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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 CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_INTERCEPTOR_H_
#define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_INTERCEPTOR_H_
#include <stdint.h>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/timer/timer.h"
class DevToolsNetworkConditions;
namespace base {
class TimeDelta;
class TimeTicks;
}
// DevToolsNetworkInterceptor emulates network conditions for transactions with
// specific client id.
class DevToolsNetworkInterceptor {
public:
using ThrottleCallback = base::Callback<void(int, int64_t)>;
DevToolsNetworkInterceptor();
virtual ~DevToolsNetworkInterceptor();
base::WeakPtr<DevToolsNetworkInterceptor> GetWeakPtr();
// Applies network emulation configuration.
void UpdateConditions(scoped_ptr<DevToolsNetworkConditions> conditions);
// Throttles with |is_upload == true| always succeed, even in offline mode.
int StartThrottle(int result,
int64_t bytes,
base::TimeTicks send_end,
bool start,
bool is_upload,
const ThrottleCallback& callback);
void StopThrottle(const ThrottleCallback& callback);
bool IsOffline();
private:
struct ThrottleRecord {
public:
ThrottleRecord();
ThrottleRecord(const ThrottleRecord& other);
~ThrottleRecord();
int result;
int64_t bytes;
int64_t send_end;
bool is_upload;
ThrottleCallback callback;
};
using ThrottleRecords = std::vector<ThrottleRecord>;
void FinishRecords(ThrottleRecords* records, bool offline);
uint64_t UpdateThrottledRecords(base::TimeTicks now, ThrottleRecords* records,
uint64_t last_tick, base::TimeDelta tick_length);
void UpdateThrottled(base::TimeTicks now);
void UpdateSuspended(base::TimeTicks now);
void CollectFinished(ThrottleRecords* records, ThrottleRecords* finished);
void OnTimer();
base::TimeTicks CalculateDesiredTime(const ThrottleRecords& records,
uint64_t last_tick, base::TimeDelta tick_length);
void ArmTimer(base::TimeTicks now);
void RemoveRecord(ThrottleRecords* records, const ThrottleCallback& callback);
scoped_ptr<DevToolsNetworkConditions> conditions_;
// Throttables suspended for a "latency" period.
ThrottleRecords suspended_;
// Throttables waiting certain amount of transfer to be "accounted".
ThrottleRecords download_;
ThrottleRecords upload_;
base::OneShotTimer timer_;
base::TimeTicks offset_;
base::TimeDelta download_tick_length_;
base::TimeDelta upload_tick_length_;
base::TimeDelta latency_length_;
uint64_t download_last_tick_;
uint64_t upload_last_tick_;
base::WeakPtrFactory<DevToolsNetworkInterceptor> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(DevToolsNetworkInterceptor);
};
#endif // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_INTERCEPTOR_H_
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