Delimit data (JSON) with newline when sending to server over socket using NSOutputStream

Question

I'm making a TCP protocol where an app sends JSON to a server and it sends JSON back. I am trying to delimit each transmission with a newline. This is fine on the server side, but how do you add a newline to each NSOutputStream write?

The streams are set-up correctly and here's the code I'm using to send data:

NSInteger sendJSON = [NSJSONSerialization writeJSONObject:dictionary toStream:self.outputStream options:0 error:nil];

How do you add a newline (\n) to the end of that, surely there's a way?

@Binyamin - Yep, that just adds a lot of unnecessary whitespace around the JSON. Thanks for the thought though. — Jon Cox, Mar 18 '12 at 22:31

score 1 · Accepted Answer · answered Mar 21 '12 at 13:44

Not forgetting that Objective C is a strict superset of C the simplest solution could be to add a new line after invoking the code in your question:

const char* newLine = "\n";
if (self.outputStream.hasSpaceAvailable) {
    [self.outputStream write:(const uint8_t*)newLine maxLength:1];
}

Delimit data (JSON) with newline when sending to server over socket using NSOutputStream

1 Answers1