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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 <stddef.h>
#include <memory>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include "base/base64.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback_helpers.h"
#include "base/command_line.h"
#include "base/format_macros.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/memory/ref_counted_memory.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/trace_event/trace_event.h"
#include "base/values.h"
#include "content/browser/tracing/grit/tracing_resources.h"
#include "content/browser/tracing/tracing_controller_impl.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/tracing_controller.h"
#include "content/public/browser/tracing_delegate.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/content_client.h"
#include "content/public/common/url_constants.h"
namespace content {
namespace {
void OnGotCategories(WebUIDataSource::GotDataCallback callback,
const std::set<std::string>& categorySet) {
base::ListValue category_list;
for (auto it = categorySet.begin(); it != categorySet.end(); it++) {
category_list.AppendString(*it);
}
scoped_refptr<base::RefCountedString> res(new base::RefCountedString());
base::JSONWriter::Write(category_list, &res->data());
std::move(callback).Run(res);
}
void OnRecordingEnabledAck(WebUIDataSource::GotDataCallback callback);
bool BeginRecording(const std::string& data64,
WebUIDataSource::GotDataCallback callback) {
base::trace_event::TraceConfig trace_config("", "");
if (!TracingUI::GetTracingOptions(data64, &trace_config))
return false;
return TracingController::GetInstance()->StartTracing(
trace_config,
base::BindOnce(&OnRecordingEnabledAck, std::move(callback)));
}
void OnRecordingEnabledAck(WebUIDataSource::GotDataCallback callback) {
std::move(callback).Run(base::MakeRefCounted<base::RefCountedString>());
}
void OnTraceBufferUsageResult(WebUIDataSource::GotDataCallback callback,
float percent_full,
size_t approximate_event_count) {
std::string str = base::NumberToString(percent_full);
std::move(callback).Run(base::RefCountedString::TakeString(&str));
}
void TracingCallbackWrapperBase64(WebUIDataSource::GotDataCallback callback,
std::unique_ptr<std::string> data) {
base::RefCountedString* data_base64 = new base::RefCountedString();
base::Base64Encode(*data, &data_base64->data());
std::move(callback).Run(data_base64);
}
bool OnBeginJSONRequest(const std::string& path,
WebUIDataSource::GotDataCallback callback) {
if (path == "json/categories") {
return TracingController::GetInstance()->GetCategories(
base::BindOnce(OnGotCategories, std::move(callback)));
}
const char kBeginRecordingPath[] = "json/begin_recording?";
if (base::StartsWith(path, kBeginRecordingPath,
base::CompareCase::SENSITIVE)) {
std::string data = path.substr(strlen(kBeginRecordingPath));
return BeginRecording(data, std::move(callback));
}
if (path == "json/get_buffer_percent_full") {
return TracingController::GetInstance()->GetTraceBufferUsage(
base::BindOnce(OnTraceBufferUsageResult, std::move(callback)));
}
if (path == "json/end_recording_compressed") {
if (!TracingController::GetInstance()->IsTracing())
return false;
scoped_refptr<TracingController::TraceDataEndpoint> data_endpoint =
TracingControllerImpl::CreateCompressedStringEndpoint(
TracingControllerImpl::CreateCallbackEndpoint(base::BindOnce(
TracingCallbackWrapperBase64, std::move(callback))),
false /* compress_with_background_priority */);
return TracingController::GetInstance()->StopTracing(data_endpoint);
}
LOG(ERROR) << "Unhandled request to " << path;
return false;
}
bool OnShouldHandleRequest(const std::string& path) {
return base::StartsWith(path, "json/", base::CompareCase::SENSITIVE);
}
void OnTracingRequest(const std::string& path,
WebUIDataSource::GotDataCallback callback) {
DCHECK(OnShouldHandleRequest(path));
// OnBeginJSONRequest() only runs |callback| if it returns true. But it needs
// to take ownership of |callback| even though it won't call |callback|
// sometimes, as it binds |callback| into other callbacks before it makes that
// decision. So we must give it one copy and keep one ourselves.
auto repeating_callback =
base::AdaptCallbackForRepeating(std::move(callback));
if (!OnBeginJSONRequest(path, repeating_callback)) {
std::string error("##ERROR##");
std::move(repeating_callback)
.Run(base::RefCountedString::TakeString(&error));
}
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
//
// TracingUI
//
////////////////////////////////////////////////////////////////////////////////
TracingUI::TracingUI(WebUI* web_ui)
: WebUIController(web_ui),
delegate_(GetContentClient()->browser()->GetTracingDelegate()) {
// Set up the chrome://tracing/ source.
BrowserContext* browser_context =
web_ui->GetWebContents()->GetBrowserContext();
WebUIDataSource* source = WebUIDataSource::Create(kChromeUITracingHost);
source->UseStringsJs();
source->SetDefaultResource(IDR_TRACING_HTML);
source->AddResourcePath("tracing.js", IDR_TRACING_JS);
source->SetRequestFilter(base::BindRepeating(OnShouldHandleRequest),
base::BindRepeating(OnTracingRequest));
WebUIDataSource::Add(browser_context, source);
}
TracingUI::~TracingUI() = default;
// static
bool TracingUI::GetTracingOptions(
const std::string& data64,
base::trace_event::TraceConfig* trace_config) {
std::string data;
if (!base::Base64Decode(data64, &data)) {
LOG(ERROR) << "Options were not base64 encoded.";
return false;
}
std::unique_ptr<base::Value> optionsRaw =
base::JSONReader::ReadDeprecated(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;
}
if (!trace_config) {
LOG(ERROR) << "trace_config can't be passed as NULL";
return false;
}
// New style options dictionary.
*trace_config = base::trace_event::TraceConfig(*options);
return true;
}
} // namespace content
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