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Side by Side Diff: headless/lib/browser/headless_net_log.cc

Issue 2841953002: headless: Add support for net logging (Closed)
Patch Set: CrOS build fix Created 3 years, 8 months ago
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1 // Copyright 2017 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 "headless/lib/browser/headless_net_log.h"
6
7 #include <stdio.h>
8 #include <utility>
9
10 #include "base/command_line.h"
11 #include "base/files/file_path.h"
12 #include "base/files/scoped_file.h"
13 #include "base/values.h"
14 #include "build/build_config.h"
15 #include "content/public/common/content_switches.h"
16 #include "net/log/net_log_util.h"
17 #include "net/log/write_to_file_net_log_observer.h"
18
19 namespace headless {
20 namespace {
21
22 std::unique_ptr<base::Value> GetHeadlessConstants() {
23 std::unique_ptr<base::DictionaryValue> constants_dict =
24 net::GetNetConstants();
25
26 // Add a dictionary with client information
27 base::DictionaryValue* dict = new base::DictionaryValue();
28
29 dict->SetString("name", "headless");
30 dict->SetString(
31 "command_line",
32 base::CommandLine::ForCurrentProcess()->GetCommandLineString());
33
34 constants_dict->Set("clientInfo", dict);
35
36 return std::move(constants_dict);
37 }
38
39 } // namespace
40
41 HeadlessNetLog::HeadlessNetLog(const base::FilePath& log_path) {
42 // TODO(mmenke): Other than a different set of constants, this code is
43 // identical to code in ChromeNetLog. Consider merging the code.
44
45 // Much like logging.h, bypass threading restrictions by using fopen
46 // directly. Have to write on a thread that's shutdown to handle events on
47 // shutdown properly, and posting events to another thread as they occur
48 // would result in an unbounded buffer size, so not much can be gained by
49 // doing this on another thread. It's only used when debugging, so
50 // performance is not a big concern.
51 base::ScopedFILE file;
52 #if defined(OS_WIN)
53 file.reset(_wfopen(log_path.value().c_str(), L"w"));
54 #elif defined(OS_POSIX)
55 file.reset(fopen(log_path.value().c_str(), "w"));
56 #endif
57
58 if (!file) {
59 LOG(ERROR) << "Could not open file " << log_path.value()
60 << " for net logging";
61 } else {
62 std::unique_ptr<base::Value> constants(GetHeadlessConstants());
63 write_to_file_observer_.reset(new net::WriteToFileNetLogObserver());
64 write_to_file_observer_->StartObserving(this, std::move(file),
65 constants.get(), nullptr);
66 }
67 }
68
69 HeadlessNetLog::~HeadlessNetLog() {
70 // Remove the observer we own before we're destroyed.
71 if (write_to_file_observer_)
72 write_to_file_observer_->StopObserving(nullptr);
73 }
74
75 } // namespace headless
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