1/*
2 * Copyright (C) 2013 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#import "config.h"
27#import "PublicSuffix.h"
28
29#import "WebCoreSystemInterface.h"
30#import "WebCoreNSURLExtras.h"
31#import <wtf/RetainPtr.h>
32
33#if ENABLE(PUBLIC_SUFFIX_LIST)
34
35@interface NSString (WebCoreNSURLExtras)
36- (BOOL)_web_looksLikeIPAddress;
37@end
38
39namespace WebCore {
40
41bool isPublicSuffix(const String& domain)
42{
43    return wkIsPublicSuffix(decodeHostName(domain));
44}
45
46String topPrivatelyControlledDomain(const String& domain)
47{
48    if (domain.isNull() || domain.isEmpty())
49        return String();
50
51    NSString *host = decodeHostName(domain);
52
53    if ([host _web_looksLikeIPAddress])
54        return domain;
55
56    // Match the longest possible suffix.
57    bool hasTopLevelDomain = false;
58    NSCharacterSet *dot = [[NSCharacterSet characterSetWithCharactersInString:@"."] retain];
59    NSRange nextDot = NSMakeRange(0, [host length]);
60    for (NSRange previousDot = [host rangeOfCharacterFromSet:dot]; previousDot.location != NSNotFound; nextDot = previousDot, previousDot = [host rangeOfCharacterFromSet:dot options:0 range:NSMakeRange(previousDot.location + previousDot.length, [host length] - (previousDot.location + previousDot.length))]) {
61        NSString *substring = [host substringFromIndex:previousDot.location + previousDot.length];
62        if (wkIsPublicSuffix(substring)) {
63            hasTopLevelDomain = true;
64            break;
65        }
66    }
67
68    [dot release];
69    if (!hasTopLevelDomain)
70        return String();
71
72    if (!nextDot.location)
73        return domain;
74
75    return encodeHostName([host substringFromIndex:nextDot.location + nextDot.length]);
76}
77
78}
79
80#endif
81