multipart/mixed or MultipartXHR in Objective-C for iPhone

ref: https://github.com/digg/stream

usage:

StreamRequest* req = [[[ StreamRequest alloc ] initWithURL: URL delegate: ret ] autorelease];
[ req start ];

// and play with callbacks

#pragma mark -
#pragma mark StreamRequestDelegate

- (void) requestDidStartLoad: (StreamRequest*) request {
}

- (void) request: (StreamRequest*) request didReceiveJSON: (NSDictionary*) dic {
}

- (void) requestDidFinishLoad: (StreamRequest*) request {
    [ self.request restart ]; // eternal :-)
}

- (void) request: (StreamRequest*)request didFailLoadWithError: (NSError*)error {

}