1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NET_BASE_NET_LOG_LOGGER_H_ 6 #define NET_BASE_NET_LOG_LOGGER_H_ 7 8 #include <stdio.h> 9 10 #include "base/files/scoped_file.h" 11 #include "net/base/net_log.h" 12 13 namespace base { 14 class FilePath; 15 class Value; 16 } 17 18 namespace net { 19 20 // NetLogLogger watches the NetLog event stream, and sends all entries to 21 // a file specified on creation. 22 // 23 // The text file will contain a single JSON object. 24 class NET_EXPORT NetLogLogger : public NetLog::ThreadSafeObserver { 25 public: 26 // Takes ownership of |file| and will write network events to it once logging 27 // starts. |file| must be non-NULL handle and be open for writing. 28 // |constants| is a legend for decoding constant values used in the log. 29 NetLogLogger(FILE* file, const base::Value& constants); 30 virtual ~NetLogLogger(); 31 32 // Sets the log level to log at. Must be called before StartObserving. 33 void set_log_level(NetLog::LogLevel log_level); 34 35 // Starts observing specified NetLog. Must not already be watching a NetLog. 36 // Separate from constructor to enforce thread safety. 37 void StartObserving(NetLog* net_log); 38 39 // Stops observing net_log(). Must already be watching. 40 void StopObserving(); 41 42 // net::NetLog::ThreadSafeObserver implementation: 43 virtual void OnAddEntry(const NetLog::Entry& entry) OVERRIDE; 44 45 // Create a dictionary containing legend for net/ constants. Caller takes 46 // ownership of returned value. 47 static base::DictionaryValue* GetConstants(); 48 49 private: 50 base::ScopedFILE file_; 51 52 // The LogLevel to log at. 53 NetLog::LogLevel log_level_; 54 55 // True if OnAddEntry() has been called at least once. 56 bool added_events_; 57 58 DISALLOW_COPY_AND_ASSIGN(NetLogLogger); 59 }; 60 61 } // namespace net 62 63 #endif // NET_BASE_NET_LOG_LOGGER_H_ 64