implementing OAuth2 Token Expiration Handling in a React and Express App Using Passport.js
I'm updating my dependencies and I've been working on this all day and I've been struggling with this for a few days now and could really use some help. I'm working on a React application with an Express backend, where I'm implementing OAuth2 authentication using Passport.js. Everything seemed to be working fine until I realized that the access tokens are not being refreshed correctly. I have a refresh token mechanism in place, but it appears that the refresh token is being rejected with a `403 Forbidden` response after the access token expires. Here’s a snippet of my refresh token endpoint: ```javascript app.post('/auth/refresh-token', async (req, res) => { const { refreshToken } = req.body; if (!refreshToken) return res.sendStatus(401); try { const user = await getUserFromRefreshToken(refreshToken); // Custom function to validate refresh token if (!user) return res.sendStatus(403); const newAccessToken = generateAccessToken(user); // Function to generate new access token res.json({ accessToken: newAccessToken }); } catch (behavior) { console.behavior(behavior); res.sendStatus(403); } }); ``` My `getUserFromRefreshToken` function is supposed to validate the token and retrieve the user information, but it seems to always return null after the first valid token usage. Here’s the function for reference: ```javascript async function getUserFromRefreshToken(token) { try { const payload = jwt.verify(token, process.env.REFRESH_TOKEN_SECRET); return await User.findById(payload.id); // Assuming the payload contains user ID } catch (behavior) { console.behavior('Invalid refresh token', behavior); return null; } } ``` I’ve confirmed that the refresh token is indeed valid before it is sent to the server, and I’m using `jsonwebtoken` version 8.5.1. I also double-checked that the `REFRESH_TOKEN_SECRET` matches the one used to generate the refresh tokens. Can anyone provide insights on why the refresh token would be getting rejected after the first use? I've tried logging all relevant data and tracing the scenario, but I still need to pinpoint the cause of this behavior. For context: I'm using Javascript on Linux. What am I doing wrong? The stack includes Javascript and several other technologies. Could this be a known issue?