64 lines
2.2 KiB
C++
64 lines
2.2 KiB
C++
// Copyright 2019 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/http/webfonts_histogram.h"
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#include "base/strings/string_piece.h"
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#include "net/disk_cache/blockfile/histogram_macros.h"
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namespace {
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// Tests if the substring of str that begins at pos starts with substr. If so,
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// returns true and advances pos by the length of substr.
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bool Consume(const std::string& str,
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base::StringPiece substr,
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std::string::size_type* pos) {
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if (!str.compare(*pos, substr.length(), substr.data())) {
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*pos += substr.length();
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return true;
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}
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return false;
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}
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const char kRoboto[] = "roboto";
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const char kOpenSans[] = "opensans";
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const char kRobotoHistogramName[] = "WebFont.HttpCacheStatus_roboto";
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const char kOpenSansHistogramName[] = "WebFont.HttpCacheStatus_opensans";
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const char kOthersHistogramName[] = "WebFont.HttpCacheStatus_others";
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void RecordCacheEvent(net::HttpResponseInfo::CacheEntryStatus cache_status,
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const std::string& histogram_name) {
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CACHE_HISTOGRAM_ENUMERATION(
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histogram_name, cache_status,
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net::HttpResponseInfo::CacheEntryStatus::ENTRY_MAX);
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}
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} // namespace
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namespace net::web_fonts_histogram {
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// Check if |key| is a URL for a font resource of Google Fonts.
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// If so, record the WebFont.HttpCacheStatus histogram suffixed by "roboto",
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// "opensans" or "others".
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void MaybeRecordCacheStatus(HttpResponseInfo::CacheEntryStatus cache_status,
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const std::string& key) {
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std::string::size_type pos = 0;
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if (Consume(key, "https://", &pos) || Consume(key, "http://", &pos)) {
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if (Consume(key, "themes.googleusercontent.com/static/fonts/", &pos) ||
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Consume(key, "ssl.gstatic.com/fonts/", &pos) ||
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Consume(key, "fonts.gstatic.com/s/", &pos)) {
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if (Consume(key, kRoboto, &pos)) {
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RecordCacheEvent(cache_status, kRobotoHistogramName);
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} else if (Consume(key, kOpenSans, &pos)) {
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RecordCacheEvent(cache_status, kOpenSansHistogramName);
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} else {
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RecordCacheEvent(cache_status, kOthersHistogramName);
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}
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}
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}
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}
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} // namespace net::web_fonts_histogram
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