jwt token js code example

Example 1: json web token npm

$ npm install jsonwebtoken

Example 2: jwt token example in node js

function authenticateToken(req, res, next) {
  // Gather the jwt access token from the request header
  const authHeader = req.headers['authorization']
  const token = authHeader && authHeader.split(' ')[1]
  if (token == null) return res.sendStatus(401) // if there isn't any token

  jwt.verify(token, process.env.ACCESS_TOKEN_SECRET as string, (err: any, user: any) => {
    console.log(err)
    if (err) return res.sendStatus(403)
    req.user = user
    next() // pass the execution off to whatever request the client intended
  })
}

Example 3: npm package for jwt

$ npm install jwt-simple

Example 4: decode csrf token online

{
  "alg": "CfDJ8OW5OI0CPGJBgSNlGwO0x4YF7qbYKVv7KOO-N0eFtDUzXOrL7F9Xd9W1otVi4ueJOkAmAhuoHFWNkqRaFD7zvAMHMSKncl6Vo5QXKmpvy6vqxOKxSURdIey8aZPRi3Nnhp2p9la-Al5xrVKz0lignRdcCHf3O7pF9zv_sNx_c_T7pUe3WsxaJEPX3t_9FO2Wjw"
}

Example 5: jwt

JSON Web Token is an Internet standard for creating data with optional
signature and/or optional encryption whose payload holds JSON that asserts
some number of claims.

The tokens are signed either using a private secret or a public/private key.