mirror of https://github.com/oxen-io/session-ios
Deliberate handling of MIME types for video, audio, and images.
• rejects unhandled media with unsupported attachment message • for supported media, handling of MIME type/file extension conversion in a single place • groundwork for future handling of additional types via e.g. conversionpull/1/head
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#import <Foundation/Foundation.h>
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@interface MIMETypeUtil : NSObject
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+(void) initialize;
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+(BOOL)isSupportedMIMEType:(NSString*)contentType;
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+(BOOL)isSupportedVideoMIMEType:(NSString*)contentType;
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+(BOOL)isSupportedAudioMIMEType:(NSString*)contentType;
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+(BOOL)isSupportedImageMIMEType:(NSString*)contentType;
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+(BOOL)isSupportedVideoFile:(NSString*)filePath;
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+(BOOL)isSupportedAudioFile:(NSString*)filePath;
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+(BOOL)isSupportedImageFile:(NSString*)filePath;
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+(NSString*)getSupportedExtensionFromVideoMIMEType:(NSString*)supportedMIMEType;
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+(NSString*)getSupportedExtensionFromAudioMIMEType:(NSString*)supportedMIMEType;
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+(NSString*)getSupportedExtensionFromImageMIMEType:(NSString*)supportedMIMEType;
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+(NSString*)getSupportedMIMETypeFromVideoFile:(NSString*)supportedVideoFile;
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+(NSString*)getSupportedMIMETypeFromAudioFile:(NSString*)supportedAudioFile;
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+(NSString*)getSupportedMIMETypeFromImageFile:(NSString*)supportedImageFile;
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+(NSString*)getSupportedImageMIMETypeFromImage:(UIImage*)image;
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+(BOOL)getIsSupportedTypeFromImage:(UIImage*)image;
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+(BOOL)isImage:(NSString*)contentType;
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+(BOOL)isVideo:(NSString*)contentType;
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+(BOOL)isAudio:(NSString*)contentType;
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+(NSString*)filePathForAttachment:(NSString*)uniqueId ofMIMEType:(NSString*)contentType inFolder:(NSString*)folder;
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+(NSString*)filePathForImage:(NSString*)uniqueId ofMIMEType:(NSString*)contentType inFolder:(NSString*)folder;
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+(NSString*)filePathForVideo:(NSString*)uniqueId ofMIMEType:(NSString*)contentType inFolder:(NSString*)folder;
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+(NSString*)filePathForAudio:(NSString*)uniqueId ofMIMEType:(NSString*)contentType inFolder:(NSString*)folder;
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+(NSURL*)simLinkCorrectExtensionOfFile:(NSURL*)mediaURL ofMIMEType:(NSString*)contentType;
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@end
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#import "MIMETypeUtil.h"
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#import "UIImage+contentTypes.h"
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@implementation MIMETypeUtil
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static NSDictionary *supportedVideoMIMETypesToExtensionTypes;
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static NSDictionary *supportedAudioMIMETypesToExtensionTypes;
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static NSDictionary *supportedImageMIMETypesToExtensionTypes;
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static NSDictionary *supportedVideoExtensionTypesToMIMETypes;
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static NSDictionary *supportedAudioExtensionTypesToMIMETypes;
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static NSDictionary *supportedImageExtensionTypesToMIMETypes;
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#pragma mark uses file extensions or MIME types only
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+(void) initialize {
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// Initialize must be called before this class is used. Could later be in e.g. a .plist
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supportedVideoMIMETypesToExtensionTypes =@{@"video/3gpp":@"3gp",
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@"video/3gpp2":@"3g2",
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@"video/mp4":@"mp4",
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@"video/quicktime":@"mov",
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@"video/x-m4v":@"m4v"
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};
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supportedAudioMIMETypesToExtensionTypes = @{@"audio/x-m4p":@"m4p",
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@"audio/x-m4b":@"m4b",
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@"audio/x-m4a":@"m4a",
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@"audio/wav":@"wav",
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@"audio/x-wav":@"wav",
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@"audio/x-mpeg":@"mp3",
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@"audio/mpeg":@"mp3",
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@"audio/mp4":@"mp4",
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@"audio/mp3":@"mp3",
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@"audio/mpeg3":@"mp3",
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@"audio/x-mp3":@"mp3",
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@"audio/x-mpeg3":@"mp3",
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@"audio/amr":@"amr",
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@"audio/aiff":@"aiff",
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@"audio/x-aiff":@"aiff",
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@"audio/3gpp2":@"3g2",
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@"audio/3gpp":@"3gp"
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};
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supportedImageMIMETypesToExtensionTypes = @{@"image/jpeg":@"jpeg",
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@"image/pjpeg":@"jpeg",
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@"image/png":@"png",
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@"image/gif":@"gif",
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@"image/tiff":@"tif",
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@"image/x-tiff":@"tif",
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@"image/bmp":@"bmp",
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@"image/x-windows-bmp":@"bmp"
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};
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supportedVideoExtensionTypesToMIMETypes = @{@"3gp":@"video/3gpp",
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@"3gpp":@"video/3gpp",
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@"3gp2":@"video/3gpp2",
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@"3gpp2":@"video/3gpp2",
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@"mp4":@"video/mp4",
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@"mov":@"video/quicktime",
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@"mqv":@"video/quicktime",
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@"m4v":@"video/x-m4v"
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};
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supportedAudioExtensionTypesToMIMETypes = @{@"3gp":@"audio/3gpp",
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@"3gpp":@"@audio/3gpp",
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@"3g2":@"audio/3gpp2",
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@"3gp2":@"audio/3gpp2",
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@"aiff":@"audio/aiff",
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@"aif":@"audio/aiff",
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@"aifc":@"audio/aiff",
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@"cdda":@"audio/aiff",
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@"amr":@"audio/amr",
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@"mp3":@"audio/mp3",
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@"swa":@"audio/mp3",
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@"mp4":@"audio/mp4",
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@"mpeg":@"audio/mpeg",
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@"mpg":@"audio/mpeg",
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@"wav":@"audio/wav",
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@"bwf":@"audio/wav",
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@"m4a":@"audio/x-m4a",
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@"m4b":@"audio/x-m4b",
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@"m4p":@"audio/x-m4p"
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};
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supportedImageExtensionTypesToMIMETypes = @{@"png":@"image/png",
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@"x-png":@"image/png",
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@"jfif":@"image/jpeg",
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@"jfif":@"image/pjpeg",
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@"jfif-tbnl":@"image/jpeg",
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@"jpe":@"image/jpeg",
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@"jpe":@"image/pjpeg",
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@"jpeg":@"image/jpeg",
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@"jpg":@"image/jpeg",
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@"gif":@"image/gif",
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@".tif":@"image/tiff",
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@".tiff":@"image/tiff"
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};
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}
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+(BOOL) isSupportedVideoMIMEType:(NSString*)contentType {
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return [supportedVideoMIMETypesToExtensionTypes objectForKey:contentType]!=nil;
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}
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+(BOOL) isSupportedAudioMIMEType:(NSString*)contentType {
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return [supportedAudioMIMETypesToExtensionTypes objectForKey:contentType]!=nil;
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}
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+(BOOL) isSupportedImageMIMEType:(NSString*)contentType {
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return [supportedImageMIMETypesToExtensionTypes objectForKey:contentType]!=nil;
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}
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+(BOOL) isSupportedMIMEType:(NSString*)contentType {
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return [self isSupportedImageMIMEType:contentType] || [self isSupportedAudioMIMEType:contentType] || [self isSupportedVideoMIMEType:contentType];
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}
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+(BOOL) isSupportedVideoFile:(NSString*) filePath {
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return [supportedVideoExtensionTypesToMIMETypes objectForKey:[filePath pathExtension]]!=nil;
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}
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+(BOOL) isSupportedAudioFile:(NSString*) filePath {
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return [supportedAudioExtensionTypesToMIMETypes objectForKey:[filePath pathExtension]]!=nil;
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}
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+(BOOL) isSupportedImageFile:(NSString*) filePath {
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return [supportedImageExtensionTypesToMIMETypes objectForKey:[filePath pathExtension]]!=nil;
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}
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+(NSString*) getSupportedExtensionFromVideoMIMEType:(NSString*)supportedMIMEType {
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return [supportedVideoMIMETypesToExtensionTypes objectForKey:supportedMIMEType];
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}
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+(NSString*) getSupportedExtensionFromAudioMIMEType:(NSString*)supportedMIMEType {
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return [supportedAudioMIMETypesToExtensionTypes objectForKey:supportedMIMEType];
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}
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+(NSString*) getSupportedExtensionFromImageMIMEType:(NSString*)supportedMIMEType {
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return [supportedImageMIMETypesToExtensionTypes objectForKey:supportedMIMEType];
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}
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+(NSString*) getSupportedMIMETypeFromVideoFile:(NSString*)supportedVideoFile {
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return [supportedVideoExtensionTypesToMIMETypes objectForKey:[supportedVideoFile pathExtension]];
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}
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+(NSString*) getSupportedMIMETypeFromAudioFile:(NSString*)supportedAudioFile {
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return [supportedAudioExtensionTypesToMIMETypes objectForKey:[supportedAudioFile pathExtension]];
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}
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+(NSString*) getSupportedMIMETypeFromImageFile:(NSString*)supportedImageFile {
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return [supportedImageExtensionTypesToMIMETypes objectForKey:[supportedImageFile pathExtension]];
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}
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#pragma mark uses bytes
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+(NSString*) getSupportedImageMIMETypeFromImage:(UIImage*)image {
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return [image contentType];
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}
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+(BOOL) getIsSupportedTypeFromImage:(UIImage*)image {
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return [image isSupportedImageType];
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}
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#pragma mark full attachment utilities
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+ (BOOL)isImage:(NSString*)contentType {
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return [MIMETypeUtil isSupportedImageMIMEType:contentType];
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}
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+ (BOOL)isVideo:(NSString*)contentType {
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return [MIMETypeUtil isSupportedVideoMIMEType:contentType];
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}
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+(BOOL)isAudio:(NSString*)contentType {
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return [MIMETypeUtil isSupportedAudioMIMEType:contentType];
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}
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+ (NSString*)filePathForAttachment:(NSString*)uniqueId ofMIMEType:(NSString*)contentType inFolder:(NSString*)folder {
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if ([self isVideo:contentType]){
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return [MIMETypeUtil filePathForVideo:uniqueId ofMIMEType:contentType inFolder:folder];
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}
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else if([self isAudio:contentType]) {
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return [MIMETypeUtil filePathForAudio:uniqueId ofMIMEType:contentType inFolder:folder];
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}
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else {
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return [MIMETypeUtil filePathForImage:uniqueId ofMIMEType:contentType inFolder:folder];
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}
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}
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+(NSURL*) simLinkCorrectExtensionOfFile:(NSURL*)mediaURL ofMIMEType:(NSString*)contentType {
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if([self isAudio:contentType]) {
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// Audio files in current framework require changing to have extension for player
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return [self changeFile:mediaURL toHaveExtension:[supportedAudioMIMETypesToExtensionTypes objectForKey:contentType]];
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}
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return mediaURL;
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}
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+(NSURL*) changeFile:(NSURL*)originalFile toHaveExtension:(NSString*)extension {
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NSFileManager *fileManager = [NSFileManager defaultManager];
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NSString* newPath = [originalFile.URLByDeletingPathExtension.absoluteString stringByAppendingPathExtension:extension];
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if (![fileManager fileExistsAtPath:newPath]) {
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NSError *error = nil;
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[fileManager createSymbolicLinkAtPath:newPath withDestinationPath:[originalFile path] error: &error];
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return [NSURL URLWithString:newPath];
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}
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return originalFile;
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}
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+ (NSString*)filePathForImage:(NSString*)uniqueId ofMIMEType:(NSString*)contentType inFolder:(NSString*)folder{
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return [folder stringByAppendingFormat:@"/%@",uniqueId];
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}
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+ (NSString*)filePathForVideo:(NSString*)uniqueId ofMIMEType:(NSString*)contentType inFolder:(NSString*)folder{
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return [[folder stringByAppendingFormat:@"/%@",uniqueId] stringByAppendingPathExtension:[self getSupportedExtensionFromVideoMIMEType:contentType]];
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}
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+ (NSString*)filePathForAudio:(NSString*)uniqueId ofMIMEType:(NSString*)contentType inFolder:(NSString*)folder{
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return [[folder stringByAppendingFormat:@"/%@",uniqueId] stringByAppendingPathExtension:[self getSupportedExtensionFromAudioMIMEType:contentType]];
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}
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@end
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