HTTP API GET in node.js

gistfile1.js

    http.get(endpoint + queryString, function (res) {
        var noaaResponseString = '';
        if (res.statusCode != 200) {
            tideResponseCallback(new Error("Non 200 Response"));
        }
        res.on('data', function (data) {
            noaaResponseString += data;
        });
        res.on('end', function () {
            var noaaResponseObject = JSON.parse(noaaResponseString);
            if (noaaResponseObject.error) {
                console.log("NOAA error: " + noaaResponseObj.error.message);
                tideResponseCallback(new Error(noaaResponseObj.error.message));
            } else {
                var highTide = findHighTide(noaaResponseObject);
                tideResponseCallback(null, highTide);
            }
        });
    }).on('error', function (e) {
        console.log("Communications error: " + e.message);
        tideResponseCallback(new Error(e.message));
    });