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      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 
     20 ChromeNetLog::ChromeNetLog()
     21     : net_log_temp_file_(new NetLogTempFile(this)) {
     22   const CommandLine* command_line = CommandLine::ForCurrentProcess();
     23   // Adjust base log level based on command line switch, if present.
     24   // This is done before adding any observers so the call to UpdateLogLevel when
     25   // an observers is added will set |effective_log_level_| correctly.
     26   if (command_line->HasSwitch(switches::kNetLogLevel)) {
     27     std::string log_level_string =
     28         command_line->GetSwitchValueASCII(switches::kNetLogLevel);
     29     int command_line_log_level;
     30     if (base::StringToInt(log_level_string, &command_line_log_level) &&
     31         command_line_log_level >= LOG_ALL &&
     32         command_line_log_level <= LOG_NONE) {
     33       SetBaseLogLevel(static_cast<LogLevel>(command_line_log_level));
     34     }
     35   }
     36 
     37   if (command_line->HasSwitch(switches::kLogNetLog)) {
     38     base::FilePath log_path =
     39         command_line->GetSwitchValuePath(switches::kLogNetLog);
     40     // Much like logging.h, bypass threading restrictions by using fopen
     41     // directly.  Have to write on a thread that's shutdown to handle events on
     42     // shutdown properly, and posting events to another thread as they occur
     43     // would result in an unbounded buffer size, so not much can be gained by
     44     // doing this on another thread.  It's only used when debugging Chrome, so
     45     // performance is not a big concern.
     46     FILE* file = NULL;
     47 #if defined(OS_WIN)
     48     file = _wfopen(log_path.value().c_str(), L"w");
     49 #elif defined(OS_POSIX)
     50     file = fopen(log_path.value().c_str(), "w");
     51 #endif
     52 
     53     if (file == NULL) {
     54       LOG(ERROR) << "Could not open file " << log_path.value()
     55                  << " for net logging";
     56     } else {
     57       scoped_ptr<base::Value> constants(NetInternalsUI::GetConstants());
     58       net_log_logger_.reset(new net::NetLogLogger(file, *constants));
     59       net_log_logger_->StartObserving(this);
     60     }
     61   }
     62 }
     63 
     64 ChromeNetLog::~ChromeNetLog() {
     65   net_log_temp_file_.reset();
     66   // Remove the observers we own before we're destroyed.
     67   if (net_log_logger_)
     68     RemoveThreadSafeObserver(net_log_logger_.get());
     69 }
     70 
     71