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_parse::Parsed& parsed = 22 request->url().parsed_for_possibly_invalid_spec(); 23 // + 1 to skip the slash at the beginning of the path. 24 int offset = parsed.CountCharactersBefore(url_parse::Parsed::PATH, false) + 1; 25 26 if (offset < static_cast<int>(spec.size())) 27 path_.assign(spec.substr(offset)); 28 } 29 30 void AboutHistogram(std::string* data, const std::string& path) { 31 HistogramSynchronizer::FetchHistograms(); 32 33 std::string unescaped_query; 34 std::string unescaped_title("About Histograms"); 35 if (!path.empty()) { 36 unescaped_query = net::UnescapeURLComponent(path, 37 net::UnescapeRule::NORMAL); 38 unescaped_title += " - " + unescaped_query; 39 } 40 41 data->append("<!DOCTYPE html>\n<html>\n<head>\n"); 42 data->append( 43 "<meta http-equiv=\"Content-Security-Policy\" " 44 "content=\"object-src 'none'; script-src 'none'\">"); 45 data->append("<title>"); 46 data->append(net::EscapeForHTML(unescaped_title)); 47 data->append("</title>\n"); 48 data->append("</head><body>"); 49 50 // Display any stats for which we sent off requests the last time. 51 data->append("<p>Stats as of last page load;"); 52 data->append("reload to get stats as of this page load.</p>\n"); 53 data->append("<table width=\"100%\">\n"); 54 55 base::StatisticsRecorder::WriteHTMLGraph(unescaped_query, data); 56 } 57 58 int HistogramInternalsRequestJob::GetData( 59 std::string* mime_type, 60 std::string* charset, 61 std::string* data, 62 const net::CompletionCallback& callback) const { 63 mime_type->assign("text/html"); 64 charset->assign("UTF8"); 65 66 data->clear(); 67 AboutHistogram(data, path_); 68 return net::OK; 69 } 70 71 } // namespace content 72
