signalapp/AFNetworking
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Fix parsing of HTTP Accept headers

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This commit is contained in:
Peyman 2012-09-19 16:41:52 -07:00
parent b43345b8c8
commit d59197bca0
1 changed files with 22 additions and 21 deletions
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43
AFNetworking/AFHTTPRequestOperation.m
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@ -37,33 +37,34 @@
#endif
NSSet * AFContentTypesFromHTTPHeader(NSString *string) {
static NSCharacterSet *_skippedCharacterSet = nil;
static NSCharacterSet *_trimCharacterSet = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_skippedCharacterSet = [NSCharacterSet characterSetWithCharactersInString:@" ,"];
_trimCharacterSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
});
if (!string) {
return nil;
}
NSScanner *scanner = [NSScanner scannerWithString:string];
scanner.charactersToBeSkipped = _skippedCharacterSet;
NSMutableSet *mutableContentTypes = [NSMutableSet set];
while (![scanner isAtEnd]) {
NSString *contentType = nil;
if ([scanner scanUpToString:@";" intoString:&contentType]) {
[scanner scanUpToString:@"," intoString:nil];
} else {
[scanner scanUpToCharactersFromSet:_skippedCharacterSet intoString:&contentType];
}
if (contentType) {
[mutableContentTypes addObject:contentType];
}
}
NSArray *mediaRanges = [string componentsSeparatedByString:@","];
NSMutableSet *mutableContentTypes = [NSMutableSet setWithCapacity:mediaRanges.count];
[mediaRanges enumerateObjectsUsingBlock:^(NSString *mediaRange, NSUInteger idx, BOOL *stop) {
NSRange startOfParameters = [mediaRange rangeOfString:@";"];
if (startOfParameters.location != NSNotFound) {
mediaRange = [mediaRange substringToIndex:startOfParameters.location];
}
mediaRange = [mediaRange stringByTrimmingCharactersInSet:_trimCharacterSet];
if (mediaRange.length > 0)
[mutableContentTypes addObject:mediaRange];
}];
return [NSSet setWithSet:mutableContentTypes];
}