| // Copyright 2017 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 "chrome/common/page_load_metrics/page_load_metrics_util.h" |
| |
| #include <algorithm> |
| |
| #include "base/strings/string_util.h" |
| #include "net/base/registry_controlled_domains/registry_controlled_domain.h" |
| |
| namespace page_load_metrics { |
| |
| base::Optional<std::string> GetGoogleHostnamePrefix(const GURL& url) { |
| const size_t registry_length = |
| net::registry_controlled_domains::GetRegistryLength( |
| url, |
| |
| // Do not include unknown registries (registries that don't have any |
| // matches in effective TLD names). |
| net::registry_controlled_domains::EXCLUDE_UNKNOWN_REGISTRIES, |
| |
| // Do not include private registries, such as appspot.com. We don't |
| // want to match URLs like www.google.appspot.com. |
| net::registry_controlled_domains::EXCLUDE_PRIVATE_REGISTRIES); |
| |
| const base::StringPiece hostname = url.host_piece(); |
| if (registry_length == 0 || registry_length == std::string::npos || |
| registry_length >= hostname.length()) { |
| return base::Optional<std::string>(); |
| } |
| |
| // Removes the tld and the preceding dot. |
| const base::StringPiece hostname_minus_registry = |
| hostname.substr(0, hostname.length() - (registry_length + 1)); |
| |
| if (hostname_minus_registry == "google") |
| return std::string(""); |
| |
| if (!base::EndsWith(hostname_minus_registry, ".google", |
| base::CompareCase::INSENSITIVE_ASCII)) { |
| return base::Optional<std::string>(); |
| } |
| |
| return std::string(hostname_minus_registry.substr( |
| 0, hostname_minus_registry.length() - strlen(".google"))); |
| } |
| |
| bool IsGoogleHostname(const GURL& url) { |
| return GetGoogleHostnamePrefix(url).has_value(); |
| } |
| |
| base::Optional<base::TimeDelta> OptionalMin( |
| const base::Optional<base::TimeDelta>& a, |
| const base::Optional<base::TimeDelta>& b) { |
| if (a && !b) |
| return a; |
| if (b && !a) |
| return b; |
| if (!a && !b) |
| return a; // doesn't matter which |
| return base::Optional<base::TimeDelta>(std::min(a.value(), b.value())); |
| } |
| |
| } // namespace page_load_metrics |