iOS - Uploading image with EXIF intact

Question

I have images saved in my application Documents directory in .jpg format with EXIF data. My problem is, whenever I try to convert the .jpg files into NSData to be uploaded using HTTP POST, the uploaded image loses all its EXIF data.

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *imagePath = [documentsPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",imageName]];
NSData *jpegImageData = [NSData dataWithContentsOfFile:imagePath]; 

How can I upload my .jpg files from Documents directory with their EXIF intact?

Answer 1

To keep the EXIF metadata of jpg file. I worked with the solution:

- (void)uploadImage:(NSString *)imagePath {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
        // Repair upload data
        UIImage *image = [UIImage imageNamed:imagePath];

        NSData *rawDataImage = UIImageJPEGRepresentation(image, 1.0f);

        NSString *base64EncodedString = @"";
        if ([rawDataImage respondsToSelector:@selector(base64EncodedStringWithOptions:)])
        {
            base64EncodedString = [rawDataImage base64EncodedStringWithOptions:0];
        }
        else
        {
            base64EncodedString = [rawDataImage base64Encoding];
        }

        NSString *uploadBody = [NSString stringWithFormat:@"{\"imageData\": \"%@\"}", base64EncodedString];

        // Post uploadBody to server
        NSString *serverUrl = @"Your_server";

        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:serverUrl]];

        [request addValue:@"application/json; charset=utf-8" forHTTPHeaderField:@"Content-Type"];

        NSString *msgLength = [NSString stringWithFormat:@"%lu", uploadBody.length];
        [request addValue:msgLength forHTTPHeaderField:@"Content-Length"];

        [request setHTTPMethod:@"POST"];
        [request setHTTPBody:[uploadBody dataUsingEncoding:NSUTF8StringEncoding]];

        [NSURLConnection connectionWithRequest:request delegate:<your_delegate OR nil>];
    });
}

Hope this help you.