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