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/ui/webui/profiler_ui.h" 6 7 #include <string> 8 9 // When testing the javacript code, it is cumbersome to have to keep 10 // re-building the resouces package and reloading the browser. To solve 11 // this, enable the following flag to read the webapp's source files 12 // directly off disk, so all you have to do is refresh the page to 13 // test the modifications. 14 // #define USE_SOURCE_FILES_DIRECTLY 15 16 #include "base/bind.h" 17 #include "base/memory/scoped_ptr.h" 18 #include "base/strings/string_util.h" 19 #include "base/tracked_objects.h" 20 #include "base/values.h" 21 #include "chrome/browser/profiles/profile.h" 22 #include "chrome/browser/task_profiler/task_profiler_data_serializer.h" 23 #include "chrome/common/url_constants.h" 24 #include "components/metrics/profiler/tracking_synchronizer.h" 25 #include "content/public/browser/browser_thread.h" 26 #include "content/public/browser/url_data_source.h" 27 #include "content/public/browser/web_contents.h" 28 #include "content/public/browser/web_ui.h" 29 #include "content/public/browser/web_ui_data_source.h" 30 #include "content/public/browser/web_ui_message_handler.h" 31 #include "grit/browser_resources.h" 32 33 #ifdef USE_SOURCE_FILES_DIRECTLY 34 #include "base/base_paths.h" 35 #include "base/files/file_util.h" 36 #include "base/memory/ref_counted_memory.h" 37 #include "base/path_service.h" 38 #endif // USE_SOURCE_FILES_DIRECTLY 39 40 using content::BrowserThread; 41 using content::WebContents; 42 using content::WebUIMessageHandler; 43 using metrics::TrackingSynchronizer; 44 45 namespace { 46 47 #ifdef USE_SOURCE_FILES_DIRECTLY 48 49 class ProfilerWebUIDataSource : public content::URLDataSource { 50 public: 51 ProfilerWebUIDataSource() { 52 } 53 54 protected: 55 // content::URLDataSource implementation. 56 virtual std::string GetSource() OVERRIDE { 57 return chrome::kChromeUIProfilerHost; 58 } 59 60 virtual std::string GetMimeType(const std::string& path) const OVERRIDE { 61 if (EndsWith(path, ".js", false)) 62 return "application/javascript"; 63 return "text/html"; 64 } 65 66 virtual void StartDataRequest( 67 const std::string& path, 68 bool is_incognito, 69 const content::URLDataSource::GotDataCallback& callback) OVERRIDE { 70 base::FilePath base_path; 71 PathService::Get(base::DIR_SOURCE_ROOT, &base_path); 72 base_path = base_path.AppendASCII("chrome"); 73 base_path = base_path.AppendASCII("browser"); 74 base_path = base_path.AppendASCII("resources"); 75 base_path = base_path.AppendASCII("profiler"); 76 77 // If no resource was specified, default to profiler.html. 78 std::string filename = path.empty() ? "profiler.html" : path; 79 80 base::FilePath file_path; 81 file_path = base_path.AppendASCII(filename); 82 83 // Read the file synchronously and send it as the response. 84 base::ThreadRestrictions::ScopedAllowIO allow; 85 std::string file_contents; 86 if (!base::ReadFileToString(file_path, &file_contents)) 87 LOG(ERROR) << "Couldn't read file: " << file_path.value(); 88 scoped_refptr<base::RefCountedString> response = 89 new base::RefCountedString(); 90 response->data() = file_contents; 91 callback.Run(response); 92 } 93 94 private: 95 DISALLOW_COPY_AND_ASSIGN(ProfilerWebUIDataSource); 96 }; 97 98 #else // USE_SOURCE_FILES_DIRECTLY 99 100 content::WebUIDataSource* CreateProfilerHTMLSource() { 101 content::WebUIDataSource* source = 102 content::WebUIDataSource::Create(chrome::kChromeUIProfilerHost); 103 104 source->SetJsonPath("strings.js"); 105 source->AddResourcePath("profiler.js", IDR_PROFILER_JS); 106 source->SetDefaultResource(IDR_PROFILER_HTML); 107 return source; 108 } 109 110 #endif 111 112 // This class receives javascript messages from the renderer. 113 // Note that the WebUI infrastructure runs on the UI thread, therefore all of 114 // this class's methods are expected to run on the UI thread. 115 class ProfilerMessageHandler : public WebUIMessageHandler { 116 public: 117 ProfilerMessageHandler() {} 118 119 // WebUIMessageHandler implementation. 120 virtual void RegisterMessages() OVERRIDE; 121 122 // Messages. 123 void OnGetData(const base::ListValue* list); 124 void OnResetData(const base::ListValue* list); 125 126 private: 127 DISALLOW_COPY_AND_ASSIGN(ProfilerMessageHandler); 128 }; 129 130 void ProfilerMessageHandler::RegisterMessages() { 131 DCHECK_CURRENTLY_ON(BrowserThread::UI); 132 133 web_ui()->RegisterMessageCallback("getData", 134 base::Bind(&ProfilerMessageHandler::OnGetData, base::Unretained(this))); 135 web_ui()->RegisterMessageCallback("resetData", 136 base::Bind(&ProfilerMessageHandler::OnResetData, 137 base::Unretained(this))); 138 } 139 140 void ProfilerMessageHandler::OnGetData(const base::ListValue* list) { 141 ProfilerUI* profiler_ui = static_cast<ProfilerUI*>(web_ui()->GetController()); 142 profiler_ui->GetData(); 143 } 144 145 void ProfilerMessageHandler::OnResetData(const base::ListValue* list) { 146 tracked_objects::ThreadData::ResetAllThreadData(); 147 } 148 149 } // namespace 150 151 ProfilerUI::ProfilerUI(content::WebUI* web_ui) 152 : WebUIController(web_ui), 153 weak_ptr_factory_(this) { 154 web_ui->AddMessageHandler(new ProfilerMessageHandler()); 155 156 // Set up the chrome://profiler/ source. 157 Profile* profile = Profile::FromWebUI(web_ui); 158 #if defined(USE_SOURCE_FILES_DIRECTLY) 159 content::URLDataSource::Add(profile, new ProfilerWebUIDataSource); 160 #else 161 content::WebUIDataSource::Add(profile, CreateProfilerHTMLSource()); 162 #endif 163 } 164 165 ProfilerUI::~ProfilerUI() { 166 } 167 168 void ProfilerUI::GetData() { 169 TrackingSynchronizer::FetchProfilerDataAsynchronously( 170 weak_ptr_factory_.GetWeakPtr()); 171 } 172 173 void ProfilerUI::ReceivedProfilerData( 174 const tracked_objects::ProcessDataSnapshot& profiler_data, 175 int process_type) { 176 // Serialize the data to JSON. 177 base::DictionaryValue json_data; 178 task_profiler::TaskProfilerDataSerializer::ToValue(profiler_data, 179 process_type, 180 &json_data); 181 182 // Send the data to the renderer. 183 web_ui()->CallJavascriptFunction("g_browserBridge.receivedData", json_data); 184 } 185
