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Side by Side Diff: content/browser/histogram_internals_request_job.cc

Issue 2874623002: Implement chrome://histograms with network service. (Closed)
Patch Set: add comment Created 3 years, 7 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "content/browser/histogram_internals_request_job.h" 5 #include "content/browser/histogram_internals_request_job.h"
6 6
7 #include "base/metrics/histogram_macros.h" 7 #include "base/metrics/histogram_macros.h"
8 #include "base/metrics/statistics_recorder.h" 8 #include "base/metrics/statistics_recorder.h"
9 #include "content/browser/histogram_synchronizer.h" 9 #include "content/browser/histogram_synchronizer.h"
10 #include "content/public/browser/browser_thread.h" 10 #include "content/public/browser/browser_thread.h"
11 #include "net/base/escape.h" 11 #include "net/base/escape.h"
12 #include "net/base/net_errors.h" 12 #include "net/base/net_errors.h"
13 #include "net/url_request/url_request.h" 13 #include "net/url_request/url_request.h"
14 #include "url/gurl.h" 14 #include "url/gurl.h"
15 15
16 namespace content { 16 namespace content {
17 17
18 HistogramInternalsRequestJob::HistogramInternalsRequestJob( 18 HistogramInternalsRequestJob::HistogramInternalsRequestJob(
19 net::URLRequest* request, 19 net::URLRequest* request,
20 net::NetworkDelegate* network_delegate) 20 net::NetworkDelegate* network_delegate)
21 : net::URLRequestSimpleJob(request, network_delegate), weak_factory_(this) { 21 : net::URLRequestSimpleJob(request, network_delegate),
22 const std::string& spec = request->url().possibly_invalid_spec(); 22 url_(request->url()),
23 const url::Parsed& parsed = request->url().parsed_for_possibly_invalid_spec(); 23 weak_factory_(this) {}
24
25 HistogramInternalsRequestJob::~HistogramInternalsRequestJob() {}
26
27 std::string HistogramInternalsRequestJob::GenerateHTML(const GURL& url) {
28 const std::string& spec = url.possibly_invalid_spec();
29 const url::Parsed& parsed = url.parsed_for_possibly_invalid_spec();
24 // + 1 to skip the slash at the beginning of the path. 30 // + 1 to skip the slash at the beginning of the path.
25 int offset = parsed.CountCharactersBefore(url::Parsed::PATH, false) + 1; 31 int offset = parsed.CountCharactersBefore(url::Parsed::PATH, false) + 1;
26 32
33 std::string path;
27 if (offset < static_cast<int>(spec.size())) 34 if (offset < static_cast<int>(spec.size()))
28 path_.assign(spec.substr(offset)); 35 path = spec.substr(offset);
29 }
30 36
31 HistogramInternalsRequestJob::~HistogramInternalsRequestJob() {}
32
33 void AboutHistogram(std::string* data, const std::string& path) {
34 HistogramSynchronizer::FetchHistograms(); 37 HistogramSynchronizer::FetchHistograms();
35 38
36 std::string unescaped_query; 39 std::string unescaped_query;
37 std::string unescaped_title("About Histograms"); 40 std::string unescaped_title("About Histograms");
38 if (!path.empty()) { 41 if (!path.empty()) {
39 unescaped_query = net::UnescapeURLComponent(path, 42 unescaped_query = net::UnescapeURLComponent(path,
40 net::UnescapeRule::NORMAL); 43 net::UnescapeRule::NORMAL);
41 unescaped_title += " - " + unescaped_query; 44 unescaped_title += " - " + unescaped_query;
42 } 45 }
43 46
44 data->append("<!DOCTYPE html>\n<html>\n<head>\n"); 47 std::string data;
45 data->append( 48 data.append("<!DOCTYPE html>\n<html>\n<head>\n");
49 data.append(
46 "<meta http-equiv=\"Content-Security-Policy\" " 50 "<meta http-equiv=\"Content-Security-Policy\" "
47 "content=\"object-src 'none'; script-src 'none'\">"); 51 "content=\"object-src 'none'; script-src 'none'\">");
48 data->append("<title>"); 52 data.append("<title>");
49 data->append(net::EscapeForHTML(unescaped_title)); 53 data.append(net::EscapeForHTML(unescaped_title));
50 data->append("</title>\n"); 54 data.append("</title>\n");
51 data->append("</head><body>"); 55 data.append("</head><body>");
52 56
53 // Display any stats for which we sent off requests the last time. 57 // Display any stats for which we sent off requests the last time.
54 data->append("<p>Stats accumulated from browser startup to previous "); 58 data.append("<p>Stats accumulated from browser startup to previous ");
55 data->append("page load; reload to get stats as of this page load.</p>\n"); 59 data.append("page load; reload to get stats as of this page load.</p>\n");
56 data->append("<table width=\"100%\">\n"); 60 data.append("<table width=\"100%\">\n");
57 61
58 base::StatisticsRecorder::WriteHTMLGraph(unescaped_query, data); 62 base::StatisticsRecorder::WriteHTMLGraph(unescaped_query, &data);
63 return data;
59 } 64 }
60 65
61 void HistogramInternalsRequestJob::Start() { 66 void HistogramInternalsRequestJob::Start() {
62 // First import histograms from all providers and then start the URL fetch 67 // First import histograms from all providers and then start the URL fetch
63 // job. It's not possible to call URLRequestSimpleJob::Start through Bind, 68 // job. It's not possible to call URLRequestSimpleJob::Start through Bind,
64 // it ends up re-calling this method, so a small helper method is used. 69 // it ends up re-calling this method, so a small helper method is used.
65 content::BrowserThread::PostTaskAndReply( 70 content::BrowserThread::PostTaskAndReply(
66 content::BrowserThread::UI, FROM_HERE, 71 content::BrowserThread::UI, FROM_HERE,
67 base::Bind(&base::StatisticsRecorder::ImportProvidedHistograms), 72 base::Bind(&base::StatisticsRecorder::ImportProvidedHistograms),
68 base::Bind(&HistogramInternalsRequestJob::StartUrlRequest, 73 base::Bind(&HistogramInternalsRequestJob::StartUrlRequest,
69 weak_factory_.GetWeakPtr())); 74 weak_factory_.GetWeakPtr()));
70 } 75 }
71 76
72 int HistogramInternalsRequestJob::GetData( 77 int HistogramInternalsRequestJob::GetData(
73 std::string* mime_type, 78 std::string* mime_type,
74 std::string* charset, 79 std::string* charset,
75 std::string* data, 80 std::string* data,
76 const net::CompletionCallback& callback) const { 81 const net::CompletionCallback& callback) const {
77 mime_type->assign("text/html"); 82 mime_type->assign("text/html");
78 charset->assign("UTF8"); 83 charset->assign("UTF8");
79 84
80 data->clear(); 85 *data = GenerateHTML(url_);
81 AboutHistogram(data, path_);
82 return net::OK; 86 return net::OK;
83 } 87 }
84 88
85 void HistogramInternalsRequestJob::StartUrlRequest() { 89 void HistogramInternalsRequestJob::StartUrlRequest() {
86 URLRequestSimpleJob::Start(); 90 URLRequestSimpleJob::Start();
87 } 91 }
88 92
89 } // namespace content 93 } // namespace content
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