multipart/form-data posting 0 files - ios

Question

I am currently developing for iOS 7, but to keep compatibility I am making sure everything works in iOS 6 as well(of course). My multipart/form-data works in iOS 7 as expected, but in iOS 6 my server is not receiving any files(the connection is made, just no files). Is there something I am missing?
// Request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSString *boundary = #"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"uploadedFile\"; filename=\"%#.jpg\"\r\n", deviceId] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
//workaround added here
[request setHTTPBody:body];
//make request
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[conn start];
Edit: The below line was added to the above code as a workaround, but I don't think this is the "correct" way to perform this.
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

Answer 1

It seems that I have accidentally deleted a line of code. Looking through past commits I found my problem. I deleted the Content-Type line.
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[#"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];// Here was my problem
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"uploadedFile\"; filename=\"%#.jpg\"\r\n", deviceId] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];