chrome/browser/net/chrome_net_log.cc

   1 // Copyright (c) 2012 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 #include "chrome/browser/net/chrome_net_log.h"
   6
   7 #include <stdio.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/logging.h"
  11 #include "base/strings/string_number_conversions.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/values.h"
  14 #include "chrome/browser/net/net_log_temp_file.h"
  15 #include "chrome/browser/ui/webui/net_internals/net_internals_ui.h"
  16 #include "chrome/common/chrome_switches.h"
  17 #include "content/public/common/content_switches.h"
  18 #include "net/base/net_log_logger.h"
  19 #include "net/base/trace_net_log_observer.h"
  20
  21 ChromeNetLog::ChromeNetLog()
  22     : net_log_temp_file_(new NetLogTempFile(this)) {
  23   const CommandLine* command_line = CommandLine::ForCurrentProcess();
  24
  25   if (command_line->HasSwitch(switches::kLogNetLog)) {
  26     base::FilePath log_path =
  27         command_line->GetSwitchValuePath(switches::kLogNetLog);
  28     // Much like logging.h, bypass threading restrictions by using fopen
  29     // directly.  Have to write on a thread that's shutdown to handle events on
  30     // shutdown properly, and posting events to another thread as they occur
  31     // would result in an unbounded buffer size, so not much can be gained by
  32     // doing this on another thread.  It's only used when debugging Chrome, so
  33     // performance is not a big concern.
  34     FILE* file = NULL;
  35 #if defined(OS_WIN)
  36     file = _wfopen(log_path.value().c_str(), L"w");
  37 #elif defined(OS_POSIX)
  38     file = fopen(log_path.value().c_str(), "w");
  39 #endif
  40
  41     if (file == NULL) {
  42       LOG(ERROR) << "Could not open file " << log_path.value()
  43                  << " for net logging";
  44     } else {
  45       scoped_ptr<base::Value> constants(NetInternalsUI::GetConstants());
  46       net_log_logger_.reset(new net::NetLogLogger(file, *constants));
  47       if (command_line->HasSwitch(switches::kNetLogLevel)) {
  48         std::string log_level_string =
  49             command_line->GetSwitchValueASCII(switches::kNetLogLevel);
  50         int command_line_log_level;
  51         if (base::StringToInt(log_level_string, &command_line_log_level) &&
  52             command_line_log_level >= LOG_ALL &&
  53             command_line_log_level <= LOG_NONE) {
  54           net_log_logger_->set_log_level(
  55               static_cast<LogLevel>(command_line_log_level));
  56         }
  57       }
  58       net_log_logger_->StartObserving(this);
  59     }
  60   }
  61
  62   trace_net_log_observer_.reset(new net::TraceNetLogObserver());
  63   trace_net_log_observer_->WatchForTraceStart(this);
  64 }
  65
  66 ChromeNetLog::~ChromeNetLog() {
  67   net_log_temp_file_.reset();
  68   // Remove the observers we own before we're destroyed.
  69   if (net_log_logger_)
  70     RemoveThreadSafeObserver(net_log_logger_.get());
  71   if (trace_net_log_observer_)
  72     trace_net_log_observer_->StopWatchForTraceStart();
  73 }
  74