Example HTTP POST with JSON body data using Q based on reported issue https://github.com/kriskowal/q-io/issues/8#issuecomment-34633958

Q_post_example.js

var body = JSON.stringify({
        token: 'foo',
        files: files // Array of filenames
    });

    var headers = {
        'Content-Type': 'application/json',
        'Content-Length': Buffer.byteLength(body, 'utf8')
    };

    var request = {
        url: apiURL,
        charset: 'UTF-8',
        method: 'POST',
        headers: headers,
        body: [body]
    };

    return http.request(request)
        .then(function (response) {
            var ok = response.status >= 200 && response.status < 400;
            if (!ok) {
                throw new Error('API responded with a status code: ' + response.status);
            }
        });