Upload from mobile device using POST

(sorry for my english)
(i open this thread cuase the other thread was for another question)

I have a mobile device application (iOS) and i want to upload an image to my django application

In my mobile application i create the POST request (and disable csrf in my django app) using this:

- (void)upload{
NSData *imageData = UIImageJPEGRepresentation(imageView.image,90);
NSString *urlString = @"http://190.91.43.241:8000/subir/1/";
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init]autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

NSString *boundary = [NSString stringWithString:@"---------------------------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 stringWithString:@"Content-Disposition: form-data; name=\"file\"; filename=\"file\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
//[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];

// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"%@",returnString);

}

And in my Djago app:
def upload_image(request):
if request.method == 'POST':
return request.FILES['file']
return "NO imagen subida"

def subir(request,imagen):
try:
#some functions ......
result = upload_image(request)
return HttpResponse(result)
except Thrift.TException, tx:
print '%s' % (tx.message)

but i have a error 500 and if i see the logs i have this:
Exception Type: MultiValueDictKeyError
Exception Value:
"Key 'file' not found in <MultiValueDict: {}>"

Any idea?

thanks in advance..

(i'm a newbie with django and python)

Matías Hernandez Arellano
Ingeniero de Software/Proyectos en VisionLabs S.A
CDA Archlinux-CL
www.msdark.archlinux.cl

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