使用password-google-oauth向req.user添加其他数据

Question

I have a route which meant to authenticate the user using google oauth passport strategy ,( /auth/google ) I also want to pass additional data as query in the url in that route ( /auth/google?someParam=SOME_PARAM ) , this data I want to add to req.user by the time I get it back from google in ( /auth/google/callback ). The problem is that I have access to this query through /auth/google but google will redirect me to /auth/google/callback which dont have access to this data anymore.

note - Because of design limitation I cant do it with external source as database.

passport-google docs

CODE :

// auth.js 

router.get(
  "/",
  (req, res, next) => {
    let siteName = req.query.siteName;
    let pageName = req.query.pageName;
    console.log("siteName", siteName);
    return next();
  },
  passport.authenticate("google", {
    scope: ["https://www.googleapis.com/auth/plus.login"]
  })
);

module.exports = router;




// authCb.js

router.get(
  "/",
  passport.authenticate("google", {
    scope: ["https://www.googleapis.com/auth/plus.login"],
    failureRedirect: "/"
  }),
  (req, res) => {
    console.log(req.user);
    res.send(req.user);
  }
);

module.exports = router;





// app.js

app.use("/auth/google", auth);
app.use("/auth/google/callback", authCb);

Answer 1

You have to store your params in session before sending auth request to google. Then, after redirect, get your params back from session.

// auth.js 
router.get(
  "/",
  (req, res, next) => {
    req.session.lastQuery = req.query;
    return next();
  },
  passport.authenticate("google", {
    scope: ["https://www.googleapis.com/auth/plus.login"]
  })
);

module.exports = router;

// authCb.js

router.get(
  "/",
  passport.authenticate("google", {
    scope: ["https://www.googleapis.com/auth/plus.login"],
    failureRedirect: "/"
  }),
  (req, res) => {
    const { lastQuery } = req.session;
    console.log(lastQuery);
  }
);

module.exports = router;

Answer 2

You should refer to Google's documentation. You can use the "state" parameter to pass any data you want to get back once the user is back to your site. This is the main use of this parameter. You can see the details here .