1/*
2 * Copyright (C) 2005 Apple Computer, 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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#import "WebNSURLRequestExtras.h"
30
31#import "WebNSURLExtras.h"
32
33#define WebContentType  (@"Content-Type")
34#define WebUserAgent    (@"User-Agent")
35#define WebReferrer     (@"Referer")
36
37@implementation NSURLRequest (WebNSURLRequestExtras)
38
39- (NSString *)_web_HTTPReferrer
40{
41    return [self valueForHTTPHeaderField:WebReferrer];
42}
43
44- (NSString *)_web_HTTPContentType
45{
46    return [self valueForHTTPHeaderField:WebContentType];
47}
48
49- (BOOL)_web_isConditionalRequest
50{
51    if ([self valueForHTTPHeaderField:@"If-Match"] ||
52        [self valueForHTTPHeaderField:@"If-Modified-Since"] ||
53        [self valueForHTTPHeaderField:@"If-None-Match"] ||
54        [self valueForHTTPHeaderField:@"If-Range"] ||
55        [self valueForHTTPHeaderField:@"If-Unmodified-Since"])
56        return YES;
57    return NO;
58}
59
60@end
61
62@implementation NSMutableURLRequest (WebNSURLRequestExtras)
63
64- (void)_web_setHTTPContentType:(NSString *)contentType
65{
66    [self setValue:contentType forHTTPHeaderField:WebContentType];
67}
68
69- (void)_web_setHTTPReferrer:(NSString *)referrer
70{
71    // Do not set the referrer to a string that refers to a file URL.
72    // That is a potential security hole.
73    if ([referrer _webkit_isFileURL])
74        return;
75
76    // Don't allow empty Referer: headers; some servers refuse them
77    if ([referrer length] == 0)
78        return;
79
80    [self setValue:referrer forHTTPHeaderField:WebReferrer];
81}
82
83- (void)_web_setHTTPUserAgent:(NSString *)userAgent
84{
85    [self setValue:userAgent forHTTPHeaderField:WebUserAgent];
86}
87
88@end
89