content/shell/browser/shell_net_log.cc

   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 #include "content/shell/browser/shell_net_log.h"
   6
   7 #include <stdio.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/files/file_path.h"
  11 #include "base/values.h"
  12 #include "content/public/common/content_switches.h"
  13 #include "net/base/net_log_logger.h"
  14
  15 namespace content {
  16
  17 namespace {
  18
  19 base::DictionaryValue* GetShellConstants() {
  20   base::DictionaryValue* constants_dict = net::NetLogLogger::GetConstants();
  21
  22   // Add a dictionary with client information
  23   base::DictionaryValue* dict = new DictionaryValue();
  24
  25   dict->SetString("name", "content_shell");
  26   dict->SetString("command_line",
  27                   CommandLine::ForCurrentProcess()->GetCommandLineString());
  28
  29   constants_dict->Set("clientInfo", dict);
  30
  31   return constants_dict;
  32 }
  33
  34 }  // namespace
  35
  36 ShellNetLog::ShellNetLog() {
  37   const CommandLine* command_line = CommandLine::ForCurrentProcess();
  38
  39   if (command_line->HasSwitch(switches::kLogNetLog)) {
  40     base::FilePath log_path =
  41         command_line->GetSwitchValuePath(switches::kLogNetLog);
  42     // Much like logging.h, bypass threading restrictions by using fopen
  43     // directly.  Have to write on a thread that's shutdown to handle events on
  44     // shutdown properly, and posting events to another thread as they occur
  45     // would result in an unbounded buffer size, so not much can be gained by
  46     // doing this on another thread.  It's only used when debugging, so
  47     // performance is not a big concern.
  48     FILE* file = NULL;
  49 #if defined(OS_WIN)
  50     file = _wfopen(log_path.value().c_str(), L"w");
  51 #elif defined(OS_POSIX)
  52     file = fopen(log_path.value().c_str(), "w");
  53 #endif
  54
  55     if (file == NULL) {
  56       LOG(ERROR) << "Could not open file " << log_path.value()
  57                  << " for net logging";
  58     } else {
  59       scoped_ptr<base::Value> constants(GetShellConstants());
  60       net_log_logger_.reset(new net::NetLogLogger(file, *constants));
  61       net_log_logger_->StartObserving(this);
  62     }
  63   }
  64 }
  65
  66 ShellNetLog::~ShellNetLog() {
  67   // Remove the observer we own before we're destroyed.
  68   if (net_log_logger_)
  69     RemoveThreadSafeObserver(net_log_logger_.get());
  70 }
  71
  72 }  // namespace content