Streams are painful

streams.js

var IO = require("q-io");

function exists(id) {
    var deferred = Q.defer();
    var request = knoxClient.get(id);
    request.on("error", deferred.reject);
    request.on("response", function (response) {
        if (response.statusCode === 200)
            deferred.resolve(IO.Reader(response));
        } else {
            deferred.reject(new Error("Not ok"));
        }
    });
    return deferred.promise;
};

I think it ends up being IO.Reader(response).invoke("read").