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