[IOS] File content type is always "application/octet-stream"

[raedhellal]

I had a problem with uploading document and the issue is that the content type is always "application/octet-stream" when i checked the code i found this function:

/*
Borrowed from http://stackoverflow.com/questions/2439020/wheres-the-iphone-mime-type-database
*/

• (NSString *)guessMIMETypeFromFileName: (NSString *)fileName {
  CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)[fileName pathExtension], NULL);
  CFStringRef MIMEType = UTTypeCopyPreferredTagWithClass(UTI, kUTTagClassMIMEType);

  if (UTI) {
  CFRelease(UTI);
  }

  if (!MIMEType) {
  return @"application/octet-stream";
  }
  return (__bridge NSString *)(MIMEType);
  }

i guess this two lines don't work anymore to determine MIMEType
CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)[fileName pathExtension], NULL);
CFStringRef MIMEType = UTTypeCopyPreferredTagWithClass(UTI, kUTTagClassMIMEType);

it is always null

[bityogi]

Hello,

Is there a way around this? We are trying to upload HEIF images from iOS devices (with an file extension of heic) and the contentType seems to be coming back as application/octet-stream and this is causing some issues for us because we need to redirect them for processing based on the contentType if they are heif images.