requestRawWithCallback(info, data, onResult) {
        let socket;
        if (typeof data === 'string') {
            info.options.headers['Content-Length'] = Buffer.byteLength(data, 'utf8');
        }
        let callbackCalled = false;
        let handleResult = (err, res) => {
            if (!callbackCalled) {
                callbackCalled = true;
                onResult(err, res);
            }
        };
        let req = info.httpModule.request(info.options, (msg) => {
            let res = new HttpClientResponse(msg);
            handleResult(null, res);
        });
        req.on('socket', sock => {
            socket = sock;
        });
        // If we ever get disconnected, we want the socket to timeout eventually
        req.setTimeout(this._socketTimeout || 3 * 60000, () => {
            if (socket) {
                socket.end();
            }
            handleResult(new Error('Request timeout: ' + info.options.path), null);
        });
        req.on('error', function (err) {
            // err has statusCode property
            // res should have headers
            handleResult(err, null);
        });
        if (data && typeof data === 'string') {
            req.write(data, 'utf8');
        }
        if (data && typeof data !== 'string') {
            data.on('close', function () {
                req.end();
            });
            data.pipe(req);
        }
        else {
            req.end();
        }
    }
Raw request with callback.
@param info
@param data
@param onResult