Function onlyForHandshake

examples/passport-example/cjs/index.js:80–89

(middleware)

const io = new Server(httpServer);

function onlyForHandshake(middleware) {
  return (req, res, next) => {
    const isHandshake = req._query.sid === undefined;
    if (isHandshake) {
      middleware(req, res, next);
    } else {
      next();
    }
  };
}

io.engine.use(onlyForHandshake(sessionMiddleware));
io.engine.use(onlyForHandshake(passport.session()));