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// Copyright 2016 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 <string>
#include "url/gurl.h"
#include "url/origin.h"
namespace subresource_filter {
// Encapsulates the first-party origin of a document, and provides fast (cached)
// third-partiness checks against that origin, i.e. whether a given URL is
// third-party in relation to the document's origin.
// It uses a simple one-entry cache to optimize for the case when a significant
// number of consecutive URLs have the same domain.
class FirstPartyOrigin {
explicit FirstPartyOrigin(url::Origin document_origin);
const url::Origin& origin() const { return document_origin_; }
// Returns whether |url| is a third-party in relation to |this| origin. May
// return a cached value. May update the cache.
bool IsThirdParty(const GURL& url) const;
// Returns whether |url| is a third party in respect to |first_party_origin|.
static bool IsThirdParty(const GURL& url,
const url::Origin& first_party_origin);
const url::Origin document_origin_;
// One-entry cache that stores input/output of the last IsThirdParty
// call. To improve performance, the cache stores only the host part of the
// last checked URL. Checking only the host part before returning the cached
// result is correct, because registry_controlled_domains::SameDomainOrHost
// would return the same result for any GURL that has the same non-empty
// host part as the last checked URL.
mutable std::string last_checked_host_;
mutable bool last_checked_host_was_third_party_ = false;
} // namespace subresource_filter