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 "base/macros.h" 12 #include "net/base/net_log.h" 13 14 namespace base { 15 class FilePath; 16 class Value; 17 } 18 19 namespace net { 20 21 // NetLogLogger watches the NetLog event stream, and sends all entries to 22 // a file specified on creation. 23 // 24 // The text file will contain a single JSON object. 25 class NET_EXPORT NetLogLogger : public NetLog::ThreadSafeObserver { 26 public: 27 // Takes ownership of |file| and will write network events to it once logging 28 // starts. |file| must be non-NULL handle and be open for writing. 29 // |constants| is a legend for decoding constant values used in the log. 30 NetLogLogger(FILE* file, const base::Value& constants); 31 virtual ~NetLogLogger(); 32 33 // Sets the log level to log at. Must be called before StartObserving. 34 void set_log_level(NetLog::LogLevel log_level); 35 36 // Starts observing specified NetLog. Must not already be watching a NetLog. 37 // Separate from constructor to enforce thread safety. 38 void StartObserving(NetLog* net_log); 39 40 // Stops observing net_log(). Must already be watching. 41 void StopObserving(); 42 43 // net::NetLog::ThreadSafeObserver implementation: 44 virtual void OnAddEntry(const NetLog::Entry& entry) OVERRIDE; 45 46 // Create a dictionary containing legend for net/ constants. Caller takes 47 // ownership of returned value. 48 static base::DictionaryValue* GetConstants(); 49 50 private: 51 base::ScopedFILE file_; 52 53 // The LogLevel to log at. 54 NetLog::LogLevel log_level_; 55 56 // True if OnAddEntry() has been called at least once. 57 bool added_events_; 58 59 DISALLOW_COPY_AND_ASSIGN(NetLogLogger); 60 }; 61 62 } // namespace net 63 64 #endif // NET_BASE_NET_LOG_LOGGER_H_ 65