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RestKit/Code/ObjectMapping/RKHTTPUtilities.m

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Objective-C
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//
// RKHTTPUtilities.m
// RestKit
//
// Created by Blake Watters on 8/24/12.
// Copyright (c) 2012 RestKit. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#import "RKHTTPUtilities.h"
NSUInteger RKStatusCodeRangeLength = 100;
NSRange RKStatusCodeRangeForClass(RKStatusCodeClass statusCodeClass)
{
return NSMakeRange(statusCodeClass, RKStatusCodeRangeLength);
}
NSIndexSet *RKStatusCodeIndexSetForClass(RKStatusCodeClass statusCodeClass)
{
return [NSIndexSet indexSetWithIndexesInRange:RKStatusCodeRangeForClass(statusCodeClass)];
}
NSIndexSet *RKCacheableStatusCodes(void)
{
NSMutableIndexSet *cacheableStatusCodes = [NSMutableIndexSet indexSet];
[cacheableStatusCodes addIndex:200];
[cacheableStatusCodes addIndex:304];
[cacheableStatusCodes addIndex:203];
[cacheableStatusCodes addIndex:300];
[cacheableStatusCodes addIndex:301];
[cacheableStatusCodes addIndex:302];
[cacheableStatusCodes addIndex:307];
[cacheableStatusCodes addIndex:410];
return cacheableStatusCodes;
}
NSString *RKStringFromRequestMethod(RKRequestMethod method)
{
switch (method) {
case RKRequestMethodGET: return @"GET";
case RKRequestMethodPOST: return @"POST";
case RKRequestMethodPUT: return @"PUT";
case RKRequestMethodPATCH: return @"PATCH";
case RKRequestMethodDELETE: return @"DELETE";
case RKRequestMethodHEAD: return @"HEAD";
case RKRequestMethodOPTIONS: return @"OPTIONS";
default: break;
}
return nil;
}
RKRequestMethod RKRequestMethodFromString(NSString *methodName)
{
if ([methodName isEqualToString:@"GET"]) return RKRequestMethodGET;
else if ([methodName isEqualToString:@"POST"]) return RKRequestMethodPOST;
else if ([methodName isEqualToString:@"PUT"]) return RKRequestMethodPUT;
else if ([methodName isEqualToString:@"DELETE"]) return RKRequestMethodDELETE;
else if ([methodName isEqualToString:@"HEAD"]) return RKRequestMethodHEAD;
else if ([methodName isEqualToString:@"PATCH"]) return RKRequestMethodPATCH;
else if ([methodName isEqualToString:@"OPTIONS"]) return RKRequestMethodOPTIONS;
else return RKRequestMethodInvalid;
}
// Built from http://en.wikipedia.org/wiki/List_of_HTTP_status_codes
static NSDictionary *RKStatusCodesToNamesDictionary()
{
static NSDictionary *statusCodesToNamesDictionary = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
statusCodesToNamesDictionary = @{
// 1xx (Informational)
@(100): @"Continue",
@(101): @"Switching Protocols",
@(102): @"Processing",
// 2xx (Success)
@(200): @"OK",
@(201): @"Created",
@(202): @"Accepted",
@(203): @"Non-Authoritative Information",
@(204): @"No Content",
@(205): @"Reset Content",
@(206): @"Partial Content",
@(207): @"Multi-Status",
@(208): @"Already Reported",
@(226): @"IM Used",
// 3xx (Redirection)
@(300): @"Multiple Choices",
@(301): @"Moved Permanently",
@(302): @"Found",
@(303): @"See Other",
@(304): @"Not Modified",
@(305): @"Use Proxy",
@(306): @"Switch Proxy",
@(307): @"Temporary Redirect",
@(308): @"Permanent Redirect",
// 4xx (Client Error)
@(400): @"Bad Request",
@(401): @"Unauthorized",
@(402): @"Payment Required",
@(403): @"Forbidden",
@(404): @"Not Found",
@(405): @"Method Not Allowed",
@(406): @"Not Acceptable",
@(407): @"Proxy Authentication Required",
@(408): @"Request Timeout",
@(409): @"Conflict",
@(410): @"Gone",
@(411): @"Length Required",
@(412): @"Precondition Failed",
@(413): @"Request Entity Too Large",
@(414): @"Request-URI Too Long",
@(415): @"Unsupported Media Type",
@(416): @"Requested Range Not Satisfiable",
@(417): @"Expectation Failed",
@(418): @"I'm a teapot",
@(420): @"Enhance Your Calm",
@(422): @"Unprocessable Entity",
@(423): @"Locked",
@(424): @"Failed Dependency",
@(424): @"Method Failure",
@(425): @"Unordered Collection",
@(426): @"Upgrade Required",
@(428): @"Precondition Required",
@(429): @"Too Many Requests",
@(431): @"Request Header Fields Too Large",
@(451): @"Unavailable For Legal Reasons",
// 5xx (Server Error)
@(500): @"Internal Server Error",
@(501): @"Not Implemented",
@(502): @"Bad Gateway",
@(503): @"Service Unavailable",
@(504): @"Gateway Timeout",
@(505): @"HTTP Version Not Supported",
@(506): @"Variant Also Negotiates",
@(507): @"Insufficient Storage",
@(508): @"Loop Detected",
@(509): @"Bandwidth Limit Exceeded",
@(510): @"Not Extended",
@(511): @"Network Authentication Required",
};
});
return statusCodesToNamesDictionary;
}
NSString * RKStringFromStatusCode(NSInteger statusCode)
{
return [RKStatusCodesToNamesDictionary() objectForKey:@(statusCode)];
}
/**
Below is ragel source used to compile those tables. The output was polished / pretty-printed and tweaked from ragel.
As the generated code is "hard" to debug, we store the code in http-date.r1
shell% ragel -F1 http-date.rl
shell% gcc -o http-date http-date.c
shell% ./http-date 'Sun, 06 Nov 1994 08:49:37 GMT' 'Sunday, 06-Nov-94 08:49:37 GMT' 'Sun Nov 6 08:49:37 1994' 'Sat Dec 24 14:34:26 2037' 'Sunday, 06-Nov-94 08:49:37 GMT' 'Sun, 06 Nov 1994 08:49:37 GMT'
*/
static const char _httpDate_trans_keys[] = {
0, 0, 70, 87, 114, 114, 105, 105, 32, 100, 65, 83, 112, 117, 114, 114, 32,
32, 32, 57, 48, 57, 32, 32, 48, 57, 48, 57, 58, 58, 48, 57, 48, 57,
58, 58, 48, 57, 48, 57, 32, 32, 48, 57, 48, 57, 48, 57, 48, 57, 103,
103, 101, 101, 99, 99, 101, 101, 98, 98, 97, 117, 110, 110, 108, 110, 97, 97,
114, 121, 111, 111, 118, 118, 99, 99, 116, 116, 101, 101, 112, 112, 32, 32, 48,
57, 48, 57, 32, 32, 65, 83, 112, 117, 114, 114, 32, 32, 48, 57, 48, 57,
48, 57, 48, 57, 32, 32, 48, 57, 48, 57, 58, 58, 48, 57, 48, 57, 58,
58, 48, 57, 48, 57, 32, 32, 71, 71, 77, 77, 84, 84, 103, 103, 101, 101,
99, 99, 101, 101, 98, 98, 97, 117, 110, 110, 108, 110, 97, 97, 114, 121, 111,
111, 118, 118, 99, 99, 116, 116, 101, 101, 112, 112, 97, 97, 121, 121, 44, 44,
32, 32, 48, 57, 48, 57, 45, 45, 65, 83, 112, 117, 114, 114, 45, 45, 48,
57, 48, 57, 32, 32, 48, 57, 48, 57, 58, 58, 48, 57, 48, 57, 58, 58,
48, 57, 48, 57, 32, 32, 71, 71, 77, 77, 84, 84, 103, 103, 101, 101, 99,
99, 101, 101, 98, 98, 97, 117, 110, 110, 108, 110, 97, 97, 114, 121, 111, 111,
118, 118, 99, 99, 116, 116, 101, 101, 112, 112, 111, 111, 110, 110, 97, 117, 116,
116, 32, 117, 114, 114, 100, 100, 104, 117, 117, 117, 32, 114, 115, 115, 101, 101,
32, 115, 101, 101, 100, 100, 32, 110, 101, 101, 0, 0, 0, 0, 0, 0, 0
};
static const char _httpDate_key_spans[] = {
0, 18, 1, 1, 69, 19, 6, 1, 1, 26, 10, 1, 10, 10, 1, 10, 10,
1, 10, 10, 1, 10, 10, 10, 10, 1, 1, 1, 1, 1, 21, 1, 3, 1,
8, 1, 1, 1, 1, 1, 1, 1, 10, 10, 1, 19, 6, 1, 1, 10, 10,
10, 10, 1, 10, 10, 1, 10, 10, 1, 10, 10, 1, 1, 1, 1, 1, 1,
1, 1, 1, 21, 1, 3, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 10, 10, 1, 19, 6, 1, 1, 10, 10, 1, 10, 10, 1, 10, 10, 1,
10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 21, 1, 3, 1, 8, 1,
1, 1, 1, 1, 1, 1, 1, 21, 1, 86, 1, 1, 14, 1, 83, 1, 1,
84, 1, 1, 79, 1, 0, 0, 0
};
static const short _httpDate_index_offsets[] = {
0, 0, 19, 21, 23, 93, 113, 120, 122, 124, 151, 162, 164, 175, 186, 188, 199,
210, 212, 223, 234, 236, 247, 258, 269, 280, 282, 284, 286, 288, 290, 312, 314, 318,
320, 329, 331, 333, 335, 337, 339, 341, 343, 354, 365, 367, 387, 394, 396, 398, 409,
420, 431, 442, 444, 455, 466, 468, 479, 490, 492, 503, 514, 516, 518, 520, 522, 524,
526, 528, 530, 532, 554, 556, 560, 562, 571, 573, 575, 577, 579, 581, 583, 585, 587,
589, 591, 602, 613, 615, 635, 642, 644, 646, 657, 668, 670, 681, 692, 694, 705, 716,
718, 729, 740, 742, 744, 746, 748, 750, 752, 754, 756, 758, 780, 782, 786, 788, 797,
799, 801, 803, 805, 807, 809, 811, 813, 835, 837, 924, 926, 928, 943, 945, 1029, 1031,
1033, 1118, 1120, 1122, 1202, 1204, 1205, 1206
};
static const unsigned char _httpDate_indicies[] = {
0, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 3, 4, 1, 1,
5, 1, 6, 1, 7, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 10, 1, 11, 1, 1, 12, 1, 13, 1, 1, 1,
14, 1, 1, 15, 16, 17, 1, 1, 1, 18, 1, 19, 1, 1, 1, 1, 20,
1, 21, 1, 22, 1, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25, 1, 26, 1, 27, 27, 27, 27, 27, 27,
27, 27, 27, 27, 1, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 29,
1, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 31, 31, 31, 31, 31,
31, 31, 31, 31, 31, 1, 32, 1, 33, 33, 33, 33, 33, 33, 33, 33, 33,
33, 1, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 35, 1, 36, 36,
36, 36, 36, 36, 36, 36, 36, 36, 1, 37, 37, 37, 37, 37, 37, 37, 37,
37, 37, 1, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 39, 39, 39,
39, 39, 39, 39, 39, 39, 39, 1, 40, 1, 41, 1, 42, 1, 43, 1, 44,
1, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 46, 1, 47, 1, 48, 1, 49, 1, 50, 1, 51, 1, 1,
1, 1, 1, 1, 52, 1, 53, 1, 54, 1, 55, 1, 56, 1, 57, 1, 58,
1, 59, 1, 60, 60, 60, 60, 60, 60, 60, 60, 60, 60, 1, 61, 61, 61,
61, 61, 61, 61, 61, 61, 61, 1, 62, 1, 63, 1, 1, 64, 1, 65, 1,
1, 1, 66, 1, 1, 67, 68, 69, 1, 1, 1, 70, 1, 71, 1, 1, 1,
1, 72, 1, 73, 1, 74, 1, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75,
1, 76, 76, 76, 76, 76, 76, 76, 76, 76, 76, 1, 77, 77, 77, 77, 77,
77, 77, 77, 77, 77, 1, 78, 78, 78, 78, 78, 78, 78, 78, 78, 78, 1,
79, 1, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 1, 81, 81, 81, 81,
81, 81, 81, 81, 81, 81, 1, 82, 1, 83, 83, 83, 83, 83, 83, 83, 83,
83, 83, 1, 84, 84, 84, 84, 84, 84, 84, 84, 84, 84, 1, 85, 1, 86,
86, 86, 86, 86, 86, 86, 86, 86, 86, 1, 87, 87, 87, 87, 87, 87, 87,
87, 87, 87, 1, 88, 1, 89, 1, 90, 1, 91, 1, 92, 1, 93, 1, 94,
1, 95, 1, 96, 1, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 98, 1, 99, 1, 100, 1, 101, 1, 102,
1, 103, 1, 1, 1, 1, 1, 1, 104, 1, 105, 1, 106, 1, 107, 1, 108,
1, 109, 1, 110, 1, 111, 1, 112, 1, 113, 1, 114, 1, 115, 115, 115, 115,
115, 115, 115, 115, 115, 115, 1, 116, 116, 116, 116, 116, 116, 116, 116, 116, 116,
1, 117, 1, 118, 1, 1, 119, 1, 120, 1, 1, 1, 121, 1, 1, 122, 123,
124, 1, 1, 1, 125, 1, 126, 1, 1, 1, 1, 127, 1, 128, 1, 129, 1,
130, 130, 130, 130, 130, 130, 130, 130, 130, 130, 1, 131, 131, 131, 131, 131, 131,
131, 131, 131, 131, 1, 132, 1, 133, 133, 133, 133, 133, 133, 133, 133, 133, 133,
1, 134, 134, 134, 134, 134, 134, 134, 134, 134, 134, 1, 135, 1, 136, 136, 136,
136, 136, 136, 136, 136, 136, 136, 1, 137, 137, 137, 137, 137, 137, 137, 137, 137,
137, 1, 138, 1, 139, 139, 139, 139, 139, 139, 139, 139, 139, 139, 1, 140, 140,
140, 140, 140, 140, 140, 140, 140, 140, 1, 141, 1, 142, 1, 143, 1, 144, 1,
145, 1, 146, 1, 147, 1, 148, 1, 149, 1, 150, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 151, 1, 152, 1,
153, 1, 154, 1, 155, 1, 156, 1, 1, 1, 1, 1, 1, 157, 1, 158, 1,
159, 1, 160, 1, 161, 1, 162, 1, 163, 1, 164, 1, 7, 1, 165, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
164, 1, 166, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 167, 1, 168, 1, 10, 1, 169, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 170, 1, 171, 1, 8, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 172, 1, 168, 1, 173, 1, 8, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 9, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 168, 1, 174, 1, 175, 1,
8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 176, 1, 172, 1, 1, 1, 1,
0
};
static const unsigned char _httpDate_trans_targs[] = {
2, 0, 124, 126, 131, 137, 3, 4, 5, 41, 82, 6, 26, 28, 30, 33, 35,
37, 39, 7, 25, 8, 9, 10, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 141, 8, 27, 8, 29, 8, 31, 32, 8, 8, 8, 34,
8, 8, 36, 8, 38, 8, 40, 8, 42, 43, 44, 45, 46, 67, 69, 71, 74,
76, 78, 80, 47, 66, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
60, 61, 62, 63, 64, 65, 142, 48, 68, 48, 70, 48, 72, 73, 48, 48, 48,
75, 48, 48, 77, 48, 79, 48, 81, 48, 83, 84, 85, 86, 87, 88, 89, 90,
109, 111, 113, 116, 118, 120, 122, 91, 108, 92, 93, 94, 95, 96, 97, 98, 99,
100, 101, 102, 103, 104, 105, 106, 107, 143, 92, 110, 92, 112, 92, 114, 115, 92,
92, 92, 117, 92, 92, 119, 92, 121, 92, 123, 92, 125, 127, 128, 129, 130, 132,
135, 133, 134, 136, 138, 139, 140
};
static const char _httpDate_trans_actions[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0, 0, 2, 2, 0, 3, 3, 0, 4, 4, 0, 5,
5, 0, 6, 6, 6, 6, 7, 0, 8, 0, 9, 0, 0, 10, 11, 12, 0,
13, 14, 0, 15, 0, 16, 0, 17, 0, 2, 2, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 0, 6, 6, 6, 6, 0, 3, 3, 0, 4, 4,
0, 5, 5, 0, 0, 0, 0, 7, 0, 8, 0, 9, 0, 0, 10, 11, 12,
0, 13, 14, 0, 15, 0, 16, 0, 17, 0, 0, 0, 0, 2, 2, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 6, 18, 0, 3, 3, 0,
4, 4, 0, 5, 5, 0, 0, 0, 0, 7, 0, 8, 0, 9, 0, 0, 10,
11, 12, 0, 13, 14, 0, 15, 0, 16, 0, 17, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0
};
static const char _httpDate_eof_actions[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 19, 20, 21
};
static NSDate *_parseHTTPDate(const char *buf, size_t bufLen) {
const char *p = buf, *pe = p + bufLen, *eof = pe;
int parsed = 0, cs = 1;
NSDate *date = NULL;
CFGregorianDate gdate;
memset(&gdate, 0, sizeof(CFGregorianDate));
{
int _slen, _trans;
const char *_keys;
const unsigned char *_inds;
if(p == pe) { goto _test_eof; }
_resume:
_keys = _httpDate_trans_keys + (cs << 1);
_inds = _httpDate_indicies + _httpDate_index_offsets[cs];
_slen = _httpDate_key_spans[cs];
_trans = _inds[(_slen > 0) && (_keys[0] <= (*p)) && ((*p) <= _keys[1]) ? (*p) - _keys[0] : _slen];
cs = _httpDate_trans_targs[_trans];
if(_httpDate_trans_actions[_trans] == 0) { goto _again; }
switch(_httpDate_trans_actions[_trans]) {
case 6: gdate.year = gdate.year * 10 + ((*p) - '0'); break;
case 18: gdate.year = gdate.year * 10 + ((*p) - '0'); gdate.year += 1900; break;
case 10: gdate.month = 1; break;
case 9: gdate.month = 2; break;
case 13: gdate.month = 3; break;
case 1: gdate.month = 4; break;
case 14: gdate.month = 5; break;
case 12: gdate.month = 6; break;
case 11: gdate.month = 7; break;
case 7: gdate.month = 8; break;
case 17: gdate.month = 9; break;
case 16: gdate.month = 10; break;
case 15: gdate.month = 11; break;
case 8: gdate.month = 12; break;
case 2: gdate.day = gdate.day * 10 + ((*p) - '0'); break;
case 3: gdate.hour = gdate.hour * 10 + ((*p) - '0'); break;
case 4: gdate.minute = gdate.minute * 10 + ((*p) - '0'); break;
case 5: gdate.second = gdate.second * 10.0 + ((*p) - '0'); break;
}
_again:
if( cs == 0) { goto _out; }
if(++p != pe) { goto _resume; }
_test_eof: {}
if(p == eof) {
switch(_httpDate_eof_actions[cs]) {
case 19: parsed = 1; break;
case 20: parsed = 1; break;
case 21: parsed = 1; break;
}
}
_out: {}
}
static CFTimeZoneRef gmtTimeZone;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{ gmtTimeZone = CFTimeZoneCreateWithTimeIntervalFromGMT(NULL, 0.0); });
if(parsed == 1) { date = [NSDate dateWithTimeIntervalSinceReferenceDate:CFGregorianDateGetAbsoluteTime(gdate, gmtTimeZone)]; }
return(date);
}
/*
* Parse HTTP Date: http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3.1
*/
NSDate * RKDateFromHTTPDateString(NSString *httpDate)
{
char stringBuffer[256];
size_t stringLength = (size_t)CFStringGetLength((__bridge CFStringRef)httpDate);
const char *cStringPtr = (const char *)CFStringGetCStringPtr((__bridge CFStringRef)httpDate, kCFStringEncodingMacRoman);
if(cStringPtr == NULL) {
CFIndex usedBytes = 0L, convertedCount = 0L;
convertedCount = CFStringGetBytes((__bridge CFStringRef)httpDate, CFRangeMake(0L, (CFIndex)stringLength), kCFStringEncodingUTF8, '?', NO, (UInt8 *)stringBuffer, sizeof(stringBuffer) - 1L, &usedBytes);
if(((size_t)convertedCount != stringLength) || (usedBytes < 0L)) { return(NULL); }
stringBuffer[usedBytes] = '\0';
cStringPtr = (const char *)stringBuffer;
}
return(_parseHTTPDate(cStringPtr, stringLength));
}
static float const kRKURLCacheLastModFraction = 0.1f; // 10% since Last-Modified suggested by RFC2616 section 13.2.4
static float const kRKURLCacheDefault = 3600.0f; // Default cache expiration delay if none defined (1 hour)
/*
* This method tries to determine the expiration date based on a response headers dictionary.
*/
NSDate * RKHTTPCacheExpirationDateFromHeadersWithStatusCode(NSDictionary *headers, NSInteger statusCode)
{
if (statusCode != 200 && statusCode != 203 && statusCode != 300 && statusCode != 301 && statusCode != 302 && statusCode != 307 && statusCode != 410) {
// Uncacheable response status code
return nil;
}
// Check Pragma: no-cache
NSString *pragma = [headers objectForKey:@"Pragma"];
if (pragma && [pragma isEqualToString:@"no-cache"]) {
// Uncacheable response
return nil;
}
// Define "now" based on the request
NSString *date = [headers objectForKey:@"Date"];
// If no Date: header, define now from local clock
NSDate *now = date ? RKDateFromHTTPDateString(date) : [NSDate date];
// Look at info from the Cache-Control: max-age=n header
NSString *cacheControl = [[headers objectForKey:@"Cache-Control"] lowercaseString];
if (cacheControl)
{
NSRange foundRange = [cacheControl rangeOfString:@"no-store"];
if (foundRange.length > 0) {
// If no-store, the content cannot be cached at all
// See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.2
return nil;
}
foundRange = [cacheControl rangeOfString:@"no-cache"];
if (foundRange.length > 0) {
// If no-cache, we must revalidate with the origin server
// See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.1
return nil;
}
NSInteger maxAge;
foundRange = [cacheControl rangeOfString:@"max-age"];
if (foundRange.length > 0) {
NSScanner *cacheControlScanner = [NSScanner scannerWithString:cacheControl];
[cacheControlScanner setScanLocation:foundRange.location + foundRange.length];
[cacheControlScanner scanString:@"=" intoString:nil];
if ([cacheControlScanner scanInteger:&maxAge]) {
return maxAge > 0 ? [[NSDate alloc] initWithTimeInterval:maxAge sinceDate:now] : nil;
}
}
}
// If not Cache-Control found, look at the Expires header
NSString *expires = [headers objectForKey:@"Expires"];
if (expires) {
NSTimeInterval expirationInterval = 0;
NSDate *expirationDate = RKDateFromHTTPDateString(expires);
if (expirationDate) {
expirationInterval = [expirationDate timeIntervalSinceDate:now];
}
if (expirationInterval > 0) {
// Convert remote expiration date to local expiration date
return [NSDate dateWithTimeIntervalSinceNow:expirationInterval];
}
else {
// If the Expires header can't be parsed or is expired, do not cache
return nil;
}
}
if (statusCode == 302 || statusCode == 307) {
// If not explict cache control defined, do not cache those status
return nil;
}
// If no cache control defined, try some heristic to determine an expiration date
NSString *lastModified = [headers objectForKey:@"Last-Modified"];
if (lastModified) {
NSTimeInterval age = 0;
NSDate *lastModifiedDate = RKDateFromHTTPDateString(lastModified);
if (lastModifiedDate) {
// Define the age of the document by comparing the Date header with the Last-Modified header
age = [now timeIntervalSinceDate:lastModifiedDate];
}
return age > 0 ? [NSDate dateWithTimeIntervalSinceNow:(age * kRKURLCacheLastModFraction)] : nil;
}
// If nothing permitted to define the cache expiration delay nor to restrict its cacheability, use a default cache expiration delay
return [[NSDate alloc] initWithTimeInterval:kRKURLCacheDefault sinceDate:now];
}
BOOL RKURLIsRelativeToURL(NSURL *URL, NSURL *baseURL)
{
return [[URL absoluteString] hasPrefix:[baseURL absoluteString]];
}
NSString *RKPathAndQueryStringFromURLRelativeToURL(NSURL *URL, NSURL *baseURL)
{
if (baseURL) {
if (! RKURLIsRelativeToURL(URL, baseURL)) return nil;
return [[URL absoluteString] substringFromIndex:[[baseURL absoluteString] length]];
} else {
// NOTE: [URL relativeString] would return the same value as `absoluteString` if URL is not relative to a baseURL
NSString *query = [URL query];
NSString *pathWithPrevervedTrailingSlash = [CFBridgingRelease(CFURLCopyPath((CFURLRef)URL)) stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
return (query && [query length]) ? [NSString stringWithFormat:@"%@?%@", pathWithPrevervedTrailingSlash, query] : pathWithPrevervedTrailingSlash;
}
}
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