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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/tracing/tracing_ui.h"
#include <string>
#include "base/base64.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/file_util.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/values.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/tracing_controller.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_data_source.h"
#include "content/public/common/url_constants.h"
#include "grit/tracing_resources.h"
namespace content {
namespace {
void OnGotCategories(const WebUIDataSource::GotDataCallback& callback,
const std::set<std::string>& categorySet) {
scoped_ptr<base::ListValue> category_list(new base::ListValue());
for (std::set<std::string>::const_iterator it = categorySet.begin();
it != categorySet.end(); it++) {
category_list->AppendString(*it);
}
base::RefCountedString* res = new base::RefCountedString();
base::JSONWriter::Write(category_list.get(), &res->data());
callback.Run(res);
}
void OnRecordingEnabledAck(const WebUIDataSource::GotDataCallback& callback);
bool OnBeginRecording(const std::string& data64,
const WebUIDataSource::GotDataCallback& callback) {
std::string data;
if (!base::Base64Decode(data64, &data)) {
LOG(ERROR) << "Options were not base64 encoded.";
return false;
}
scoped_ptr<base::Value> optionsRaw(base::JSONReader::Read(data));
if (!optionsRaw) {
LOG(ERROR) << "Options were not valid JSON";
return false;
}
base::DictionaryValue* options;
if (!optionsRaw->GetAsDictionary(&options)) {
LOG(ERROR) << "Options must be dict";
return false;
}
std::string category_filter_string;
bool use_system_tracing;
bool use_continuous_tracing;
bool use_sampling;
bool options_ok = true;
options_ok &= options->GetString("categoryFilter", &category_filter_string);
options_ok &= options->GetBoolean("useSystemTracing", &use_system_tracing);
options_ok &= options->GetBoolean("useContinuousTracing",
&use_continuous_tracing);
options_ok &= options->GetBoolean("useSampling", &use_sampling);
if (!options_ok) {
LOG(ERROR) << "Malformed options";
return false;
}
int tracing_options = 0;
if (use_system_tracing)
tracing_options |= TracingController::ENABLE_SYSTRACE;
if (use_sampling)
tracing_options |= TracingController::ENABLE_SAMPLING;
if (use_continuous_tracing)
tracing_options |= TracingController::RECORD_CONTINUOUSLY;
return TracingController::GetInstance()->EnableRecording(
category_filter_string,
static_cast<TracingController::Options>(tracing_options),
base::Bind(&OnRecordingEnabledAck, callback));
}
void OnRecordingEnabledAck(const WebUIDataSource::GotDataCallback& callback) {
base::RefCountedString* res = new base::RefCountedString();
callback.Run(res);
}
void OnTraceBufferPercentFullResult(
const WebUIDataSource::GotDataCallback& callback, float result) {
std::string str = base::DoubleToString(result);
callback.Run(base::RefCountedString::TakeString(&str));
}
void ReadRecordingResult(const WebUIDataSource::GotDataCallback& callback,
const base::FilePath& path) {
std::string tmp;
if (!base::ReadFileToString(path, &tmp))
LOG(ERROR) << "Failed to read file " << path.value();
base::DeleteFile(path, false);
callback.Run(base::RefCountedString::TakeString(&tmp));
}
void BeginReadingRecordingResult(
const WebUIDataSource::GotDataCallback& callback,
const base::FilePath& path) {
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
base::Bind(ReadRecordingResult, callback, path));
}
bool OnBeginRequest(const std::string& path,
const WebUIDataSource::GotDataCallback& callback) {
if (path == "json/categories") {
TracingController::GetInstance()->GetCategories(
base::Bind(OnGotCategories, callback));
return true;
}
const char* beginRecordingPath = "json/begin_recording?";
if (path.find(beginRecordingPath) == 0) {
std::string data = path.substr(strlen(beginRecordingPath));
return OnBeginRecording(data, callback);
}
if (path == "json/get_buffer_percent_full") {
return TracingController::GetInstance()->GetTraceBufferPercentFull(
base::Bind(OnTraceBufferPercentFullResult, callback));
}
if (path == "json/end_recording") {
return TracingController::GetInstance()->DisableRecording(
base::FilePath(), base::Bind(BeginReadingRecordingResult, callback));
}
if (StartsWithASCII(path, "json/", true))
LOG(ERROR) << "Unhandled request to " << path;
return false;
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
//
// TracingUI
//
////////////////////////////////////////////////////////////////////////////////
TracingUI::TracingUI(WebUI* web_ui) : WebUIController(web_ui) {
// Set up the chrome://tracing/ source.
BrowserContext* browser_context =
web_ui->GetWebContents()->GetBrowserContext();
WebUIDataSource* source = WebUIDataSource::Create(kChromeUITracingHost);
source->SetJsonPath("strings.js");
source->SetDefaultResource(IDR_TRACING_HTML);
source->AddResourcePath("tracing.js", IDR_TRACING_JS);
source->SetRequestFilter(base::Bind(OnBeginRequest));
WebUIDataSource::Add(browser_context, source);
}
} // namespace content
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