| // 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/histogram_internals_request_job.h" |
| |
| #include "base/metrics/histogram_macros.h" |
| #include "base/metrics/statistics_recorder.h" |
| #include "content/browser/histogram_synchronizer.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "net/base/escape.h" |
| #include "net/base/net_errors.h" |
| #include "net/url_request/url_request.h" |
| #include "url/gurl.h" |
| |
| namespace content { |
| |
| HistogramInternalsRequestJob::HistogramInternalsRequestJob( |
| net::URLRequest* request, |
| net::NetworkDelegate* network_delegate) |
| : net::URLRequestSimpleJob(request, network_delegate), |
| url_(request->url()), |
| weak_factory_(this) {} |
| |
| HistogramInternalsRequestJob::~HistogramInternalsRequestJob() {} |
| |
| std::string HistogramInternalsRequestJob::GenerateHTML(const GURL& url) { |
| const std::string& spec = url.possibly_invalid_spec(); |
| const url::Parsed& parsed = url.parsed_for_possibly_invalid_spec(); |
| // + 1 to skip the slash at the beginning of the path. |
| int offset = parsed.CountCharactersBefore(url::Parsed::PATH, false) + 1; |
| |
| std::string path; |
| if (offset < static_cast<int>(spec.size())) |
| path = spec.substr(offset); |
| |
| HistogramSynchronizer::FetchHistograms(); |
| |
| std::string unescaped_query; |
| std::string unescaped_title("About Histograms"); |
| if (!path.empty()) { |
| unescaped_query = net::UnescapeURLComponent(path, |
| net::UnescapeRule::NORMAL); |
| unescaped_title += " - " + unescaped_query; |
| } |
| |
| std::string data; |
| data.append("<!DOCTYPE html>\n<html>\n<head>\n"); |
| data.append( |
| "<meta http-equiv=\"Content-Security-Policy\" " |
| "content=\"object-src 'none'; script-src 'none'\">"); |
| data.append("<title>"); |
| data.append(net::EscapeForHTML(unescaped_title)); |
| data.append("</title>\n"); |
| data.append("</head><body>"); |
| |
| // Display any stats for which we sent off requests the last time. |
| data.append("<p>Stats accumulated from browser startup to previous "); |
| data.append("page load; reload to get stats as of this page load.</p>\n"); |
| data.append("<table width=\"100%\">\n"); |
| |
| base::StatisticsRecorder::WriteHTMLGraph(unescaped_query, &data); |
| return data; |
| } |
| |
| void HistogramInternalsRequestJob::Start() { |
| // First import histograms from all providers and then start the URL fetch |
| // job. It's not possible to call URLRequestSimpleJob::Start through Bind, |
| // it ends up re-calling this method, so a small helper method is used. |
| content::BrowserThread::PostTaskAndReply( |
| content::BrowserThread::UI, FROM_HERE, |
| base::BindOnce(&base::StatisticsRecorder::ImportProvidedHistograms), |
| base::BindOnce(&HistogramInternalsRequestJob::StartUrlRequest, |
| weak_factory_.GetWeakPtr())); |
| } |
| |
| int HistogramInternalsRequestJob::GetData( |
| std::string* mime_type, |
| std::string* charset, |
| std::string* data, |
| const net::CompletionCallback& callback) const { |
| mime_type->assign("text/html"); |
| charset->assign("UTF8"); |
| |
| *data = GenerateHTML(url_); |
| return net::OK; |
| } |
| |
| void HistogramInternalsRequestJob::StartUrlRequest() { |
| URLRequestSimpleJob::Start(); |
| } |
| |
| } // namespace content |
