Get()

function tryParseJSON (jsonString){
  try {
    var o = JSON.parse(jsonString);

    // Handle non-exception-throwing cases:
    // Neither JSON.parse(false) or JSON.parse(1234) throw errors, hence the type-checking,
    // but... JSON.parse(null) returns 'null', and typeof null === "object",
    // so we must check for that, too.
    if (o && typeof o === "object" && o !== null) {
      return o;
    }
  }
  catch (e) { }

  return false;
}

function networkRequest(args) {
  var task = NSTask.alloc().init();
  task.setLaunchPath("/usr/bin/curl");
  task.setArguments(args);
  var outputPipe = [NSPipe pipe];
  [task setStandardOutput:outputPipe];
  task.launch();
  var responseData = [[outputPipe fileHandleForReading] readDataToEndOfFile];
  var responseString = [[[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]];
  var parsed = tryParseJSON(responseString);
  if(!parsed) {
    log("Error invoking curl");
    log("args:");
    log(args);
    log("responseString");
    log(responseString);
    throw "Error communicating with server"
  }
  return parsed;
}

log(networkRequest(["http://api.open-notify.org/astros.json"]))