Jwt helper middlewares for express.

npm install --save @permettezmoideconstruire/express-jwt

const {
  extractToken,
  verifyToken
} = require('@permettezmoideconstruire/express-jwt')

extractToken is a middleware factory.

Per RFC6750 the returned middleware will attempt to extract a bearer token from a request from these locations:

• The key access_token in the request body.
• The key access_token in the request params.
• The value from the header Authorization: Bearer <token>.

If a token is found, it will be stored on req.token. If one has been provided in more than one location, this will immediately call next with a MultipleTokenError (per RFC6750).

For APIs not RFC6750 compliant, see options :

const express = require('express')
const { extractToken } = require('@permettezmoideconstruire/express-jwt')

const app = express()
app.use(extractToken())
app.use(function(req, res) {
  console.log(req.token)
  res.send()
})

app.use(process.env.PORT)

• return function : Returns the middleware

• options.from Object{key: function(req) => string}

  • An associative array (object) of extractors. An extractor is a function that takes a single req parameter and returns a string
  • default:

    {
      query: queryBaseExtractor('access_token'),
      body: bodyBaseExtractor('access_token'),
      header: headerBasePrefixedExtractor({
        key: 'authorization',
        prefix: 'Bearer '
      })
    }
    

• options.to string

  • A string which is the key to place token inside req (for example { to: 'token' } will set req.token)
  • default: 'token'

• options.multiTolerant bool

  • A boolean which switches the behavior from a "throw when token found in multiple place" strategy to a "take first found token" strategy.
  • The concept of "first" follows the order of the keys inside options.from
  • default: false

verifyToken is a middleware factory.

The returned middleware verifies the token inside req.token and decodes it to req.token (transforms it actualy)

If you want to keep encoded token inside req, or simply change input or output key, see options.

const express = require('express')
const { extractToken, verifyToken } = require('@permettezmoideconstruire/express-jwt')

const app = express()
app.use(
  extractToken(),
  verifyToken(process.env.JWT_SECRET_KEY)
)
app.use(function(req, res) {
  console.log(req.token)
  res.send()
})

app.use(process.env.PORT)

• return function : Returns the middleware

• secretOrPrivateKey mixed

  • The key that encoded the token, and should be used to decode it
  • See auth0/node-jsonwebtoken#jwtverifytoken-secretorpublickey-options-callback

• options.from function(req) => string

  • A function that is an extractor. An extractor is a function that takes a single req parameter and returns a string
  • default: reqBaseExtractor('token')

• options.to string

  • A string which is the key to place token inside req (for example { to: 'token' } will set req.token)
  • default: 'token'

• options.jwt object

  • An object that represents jwt options for verify method (this is passed down)
  • See auth0/node-jsonwebtoken#jwtverifytoken-secretorpublickey-options-callback