blob: d754769276ddfbaef5414c11384658a0c461726f [file] [log] [blame]
/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "config.h"
#import "PublicSuffix.h"
#if ENABLE(PUBLIC_SUFFIX_LIST)
#import <pal/spi/cf/CFNetworkSPI.h>
#import <wtf/HashMap.h>
#import <wtf/text/StringHash.h>
#import <wtf/URL.h>
#import <wtf/cocoa/NSURLExtras.h>
namespace WebCore {
bool isPublicSuffix(StringView domain)
{
NSString *host = decodeHostName(domain.createNSString().get());
return host && _CFHostIsDomainTopLevel((__bridge CFStringRef)host);
}
String topPrivatelyControlledDomain(const String& domain)
{
if (domain.isEmpty())
return { };
if (!domain.isAllASCII())
return domain;
static Lock cacheLock;
Locker locker { cacheLock };
static NeverDestroyed<HashMap<String, String, ASCIICaseInsensitiveHash>> cache;
auto isolatedDomain = domain.isolatedCopy();
constexpr auto maximumSizeToPreventUnlimitedGrowth = 128;
if (cache.get().size() == maximumSizeToPreventUnlimitedGrowth)
cache.get().remove(cache.get().random());
return cache.get().ensure(isolatedDomain, [&isolatedDomain] {
const auto lowercaseDomain = isolatedDomain.convertToASCIILowercase();
if (lowercaseDomain == "localhost"_s)
return lowercaseDomain;
if (URL::hostIsIPAddress(lowercaseDomain))
return lowercaseDomain;
size_t separatorPosition;
for (unsigned labelStart = 0; (separatorPosition = lowercaseDomain.find('.', labelStart)) != notFound; labelStart = separatorPosition + 1) {
if (isPublicSuffix(StringView(lowercaseDomain).substring(separatorPosition + 1)))
return lowercaseDomain.substring(labelStart);
}
return String();
}).iterator->value.isolatedCopy();
}
String decodeHostName(const String& domain)
{
return WTF::decodeHostName(domain);
}
}
#endif