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// Copyright 2018 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/browser/android/trusted_cdn.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/no_destructor.h"
#include "chrome/common/chrome_features.h"
#include "chrome/common/chrome_switches.h"
#include "url/gurl.h"
namespace trusted_cdn {
constexpr char kDefaultTrustedCDNBaseURL[] = "https://cdn.ampproject.org";
bool IsTrustedCDN(const GURL& url) {
if (!base::FeatureList::IsEnabled(features::kShowTrustedPublisherURL))
return false;
// Use a static local (without destructor) to construct the base URL only
// once. |trusted_cdn_base_url| is initialized with the result of an
// immediately evaluated lambda, which allows wrapping the code in a single
// expression.
static const base::NoDestructor<GURL> trusted_cdn_base_url([]() {
const base::CommandLine* command_line =
base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kTrustedCDNBaseURLForTests)) {
GURL base_url(command_line->GetSwitchValueASCII(
switches::kTrustedCDNBaseURLForTests));
LOG_IF(WARNING, !base_url.is_valid()) << "Invalid trusted CDN base URL: "
<< base_url.possibly_invalid_spec();
return base_url;
}
return GURL(kDefaultTrustedCDNBaseURL);
}());
// Allow any subdomain of the base URL.
return url.DomainIs(trusted_cdn_base_url->host_piece()) &&
(url.scheme_piece() == trusted_cdn_base_url->scheme_piece()) &&
(url.EffectiveIntPort() == trusted_cdn_base_url->EffectiveIntPort());
}
} // namespace trusted_cdn
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