var url = "https://raw.github.com/appcelerator/Documentation-Examples/master/HTTPClient/data/json.txt";

var xhr = Ti.Network.createHTTPClient({
    enableKeepAlive: true,
    timeout:5000
});

xhr.open("GET", url);
xhr.setRequestHeader('Accept-Encoding','gzip, deflate');
xhr.setRequestHeader("Accept","*/*");
xhr.setRequestHeader("Accept-Language","nl-NL");
xhr.setRequestHeader("Connection","Keep-Alive");
xhr.setRequestHeader("User-Agent","test");

xhr.send();