//
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// Created by Fabrice Aneche on 06/01/14.
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// Copyright (c) 2014 Dailymotion. All rights reserved.
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//
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#import "NSData+ImageContentType.h"
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@implementation NSData (ImageContentType)
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+ (NSString *)sd_contentTypeForImageData:(NSData *)data {
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uint8_t c;
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[data getBytes:&c length:1];
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switch (c) {
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case 0xFF:
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return @"image/jpeg";
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case 0x89:
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return @"image/png";
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case 0x47:
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return @"image/gif";
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case 0x49:
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case 0x4D:
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return @"image/tiff";
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case 0x52:
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// R as RIFF for WEBP
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if ([data length] < 12) {
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return nil;
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}
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NSString *testString = [[NSString alloc] initWithData:[data subdataWithRange:NSMakeRange(0, 12)] encoding:NSASCIIStringEncoding];
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if ([testString hasPrefix:@"RIFF"] && [testString hasSuffix:@"WEBP"]) {
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return @"image/webp";
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}
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return nil;
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}
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return nil;
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}
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@end
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@implementation NSData (ImageContentTypeDeprecated)
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+ (NSString *)contentTypeForImageData:(NSData *)data {
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return [self sd_contentTypeForImageData:data];
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}
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@end
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