1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
// 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/devtools/devtools_tracing_handler.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/file_util.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/location.h"
#include "base/memory/ref_counted_memory.h"
#include "base/strings/string_split.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
#include "content/browser/devtools/devtools_http_handler_impl.h"
#include "content/browser/devtools/devtools_protocol_constants.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/tracing_controller.h"
namespace content {
namespace {
const char kRecordUntilFull[] = "record-until-full";
const char kRecordContinuously[] = "record-continuously";
const char kEnableSampling[] = "enable-sampling";
void ReadFile(
const base::FilePath& path,
const base::Callback<void(const scoped_refptr<base::RefCountedString>&)>
callback) {
std::string trace_data;
if (!base::ReadFileToString(path, &trace_data))
LOG(ERROR) << "Failed to read file: " << path.value();
base::DeleteFile(path, false);
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
base::Bind(callback, make_scoped_refptr(
base::RefCountedString::TakeString(&trace_data))));
}
} // namespace
DevToolsTracingHandler::DevToolsTracingHandler()
: weak_factory_(this) {
RegisterCommandHandler(devtools::Tracing::start::kName,
base::Bind(&DevToolsTracingHandler::OnStart,
base::Unretained(this)));
RegisterCommandHandler(devtools::Tracing::end::kName,
base::Bind(&DevToolsTracingHandler::OnEnd,
base::Unretained(this)));
}
DevToolsTracingHandler::~DevToolsTracingHandler() {
}
void DevToolsTracingHandler::BeginReadingRecordingResult(
const base::FilePath& path) {
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
base::Bind(&ReadFile, path,
base::Bind(&DevToolsTracingHandler::ReadRecordingResult,
weak_factory_.GetWeakPtr())));
}
void DevToolsTracingHandler::ReadRecordingResult(
const scoped_refptr<base::RefCountedString>& trace_data) {
if (trace_data->data().size()) {
scoped_ptr<base::Value> trace_value(base::JSONReader::Read(
trace_data->data()));
DictionaryValue* dictionary = NULL;
bool ok = trace_value->GetAsDictionary(&dictionary);
DCHECK(ok);
ListValue* list = NULL;
ok = dictionary->GetList("traceEvents", &list);
DCHECK(ok);
std::string buffer;
for (size_t i = 0; i < list->GetSize(); ++i) {
std::string item;
base::Value* item_value;
list->Get(i, &item_value);
base::JSONWriter::Write(item_value, &item);
if (buffer.size())
buffer.append(",");
buffer.append(item);
if (i % 1000 == 0) {
OnTraceDataCollected(buffer);
buffer.clear();
}
}
if (buffer.size())
OnTraceDataCollected(buffer);
}
SendNotification(devtools::Tracing::tracingComplete::kName, NULL);
}
void DevToolsTracingHandler::OnTraceDataCollected(
const std::string& trace_fragment) {
// Hand-craft protocol notification message so we can substitute JSON
// that we already got as string as a bare object, not a quoted string.
std::string message = base::StringPrintf(
"{ \"method\": \"%s\", \"params\": { \"%s\": [ %s ] } }",
devtools::Tracing::dataCollected::kName,
devtools::Tracing::dataCollected::kParamValue,
trace_fragment.c_str());
SendRawMessage(message);
}
TracingController::Options DevToolsTracingHandler::TraceOptionsFromString(
const std::string& options) {
std::vector<std::string> split;
std::vector<std::string>::iterator iter;
int ret = 0;
base::SplitString(options, ',', &split);
for (iter = split.begin(); iter != split.end(); ++iter) {
if (*iter == kRecordUntilFull) {
ret &= ~TracingController::RECORD_CONTINUOUSLY;
} else if (*iter == kRecordContinuously) {
ret |= TracingController::RECORD_CONTINUOUSLY;
} else if (*iter == kEnableSampling) {
ret |= TracingController::ENABLE_SAMPLING;
}
}
return static_cast<TracingController::Options>(ret);
}
scoped_refptr<DevToolsProtocol::Response>
DevToolsTracingHandler::OnStart(
scoped_refptr<DevToolsProtocol::Command> command) {
std::string categories;
base::DictionaryValue* params = command->params();
if (params)
params->GetString(devtools::Tracing::start::kParamCategories, &categories);
TracingController::Options options = TracingController::DEFAULT_OPTIONS;
if (params && params->HasKey(devtools::Tracing::start::kParamOptions)) {
std::string options_param;
params->GetString(devtools::Tracing::start::kParamOptions, &options_param);
options = TraceOptionsFromString(options_param);
}
TracingController::GetInstance()->EnableRecording(
categories, options,
TracingController::EnableRecordingDoneCallback());
return command->SuccessResponse(NULL);
}
scoped_refptr<DevToolsProtocol::Response>
DevToolsTracingHandler::OnEnd(
scoped_refptr<DevToolsProtocol::Command> command) {
TracingController::GetInstance()->DisableRecording(
base::FilePath(),
base::Bind(&DevToolsTracingHandler::BeginReadingRecordingResult,
weak_factory_.GetWeakPtr()));
return command->SuccessResponse(NULL);
}
} // namespace content
|
