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histogram_internals_request_job.cc
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// 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.h"
#include "base/metrics/statistics_recorder.h"
#include "content/browser/histogram_synchronizer.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) {
const std::string& spec = request->url().possibly_invalid_spec();
const url_parse::Parsed& parsed =
request->url().parsed_for_possibly_invalid_spec();
// + 1 to skip the slash at the beginning of the path.
int offset = parsed.CountCharactersBefore(url_parse::Parsed::PATH, false) + 1;
if (offset < static_cast<int>(spec.size()))
path_.assign(spec.substr(offset));
}
void AboutHistogram(std::string* data, const std::string& path) {
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;
}
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 as of last page load;");
data->append("reload to get stats as of this page load.</p>\n");
data->append("<table width=\"100%\">\n");
base::StatisticsRecorder::WriteHTMLGraph(unescaped_query, data);
}
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->clear();
AboutHistogram(data, path_);
return net::OK;
}
} // namespace content