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 3 // found in the LICENSE file. 4 5 #include "content/browser/histogram_internals_request_job.h" 6 7 #include "base/metrics/histogram.h" 8 #include "base/metrics/statistics_recorder.h" 9 #include "content/browser/histogram_synchronizer.h" 10 #include "net/base/escape.h" 11 #include "net/base/net_errors.h" 12 #include "net/url_request/url_request.h" 13 #include "url/gurl.h" 14 15 namespace content { 16 17 HistogramInternalsRequestJob::HistogramInternalsRequestJob( 18 net::URLRequest* request, net::NetworkDelegate* network_delegate) 19 : net::URLRequestSimpleJob(request, network_delegate) { 20 const std::string& spec = request->url().possibly_invalid_spec(); 21 const url::Parsed& parsed = request->url().parsed_for_possibly_invalid_spec(); 22 // + 1 to skip the slash at the beginning of the path. 23 int offset = parsed.CountCharactersBefore(url::Parsed::PATH, false) + 1; 24 25 if (offset < static_cast<int>(spec.size())) 26 path_.assign(spec.substr(offset)); 27 } 28 29 void AboutHistogram(std::string* data, const std::string& path) { 30 HistogramSynchronizer::FetchHistograms(); 31 32 std::string unescaped_query; 33 std::string unescaped_title("About Histograms"); 34 if (!path.empty()) { 35 unescaped_query = net::UnescapeURLComponent(path, 36 net::UnescapeRule::NORMAL); 37 unescaped_title += " - " + unescaped_query; 38 } 39 40 data->append("<!DOCTYPE html>\n<html>\n<head>\n"); 41 data->append( 42 "<meta http-equiv=\"Content-Security-Policy\" " 43 "content=\"object-src 'none'; script-src 'none'\">"); 44 data->append("<title>"); 45 data->append(net::EscapeForHTML(unescaped_title)); 46 data->append("</title>\n"); 47 data->append("</head><body>"); 48 49 // Display any stats for which we sent off requests the last time. 50 data->append("<p>Stats accumulated from browser startup to previous "); 51 data->append("page load; reload to get stats as of this page load.</p>\n"); 52 data->append("<table width=\"100%\">\n"); 53 54 base::StatisticsRecorder::WriteHTMLGraph(unescaped_query, data); 55 } 56 57 int HistogramInternalsRequestJob::GetData( 58 std::string* mime_type, 59 std::string* charset, 60 std::string* data, 61 const net::CompletionCallback& callback) const { 62 mime_type->assign("text/html"); 63 charset->assign("UTF8"); 64 65 data->clear(); 66 AboutHistogram(data, path_); 67 return net::OK; 68 } 69 70 } // namespace content 71
