app.use(function (req, res, next) {
    var jl      = new JsonLoader();

    if(req.headers['content-encoding'] == 'deflate') {
        req.pipe(zlib.createGunzip()).pipe(jl);
    } else {
        req.pipe(jl);
    }

    req.once('data', function (chunk) {
        var firstChunk = chunk.toString();
        console.log(firstChunk.charAt(0));
    });

    jl.on('data', function (obj) {
        req.body = obj;
    });

    jl.on('end', next);
});