README.md

passport-line-v2

Passport strategy for login using line api (version 2). Some part of code is copies from https://www.npmjs.com/package/passport-line.

Pre-requisite

• need to create line business account business.line.me
• after register to the line business account, you will get line channel id and line secret, we will use both value later
• from https://developers.line.me, at Technical Configuration tab, we need to add callback url
• official documentation is available at https://developers.line.me/line-login/overview

How to run example code

clone project

git clone https://github.com/piggyman007/passport-line-v2.git

modify some parameters at /example/index.js

const LINE_CHANNEL_ID = 'put your line channel id here'
const LINE_CHANNEL_SECRET = 'put your line channel secret here'
const CALLBACK_URL = 'your call back url' // e.g., https:www.somedomain.com or https://1.2.3.4

• callback url cannot be localhost or 127.0.0.1
• callback url must be https protocal
• callback url must be the same value as specify in the Pre-requisite section

the example code is located at /example folder, goto it

cd example

install dependency modules

npm i

start app

npm start

the application will start on port 5000

Sample usage code

sample usage code below is from /example/index.js

/** decaration part */

// specify some parameters here
const LINE_CHANNEL_ID = 'put your line channel id here'
const LINE_CHANNEL_SECRET = 'put your line channel secret here'
const CALLBACK_URL = 'your call back url' // e.g., https:www.somedomain.com or https://1.2.3.4

// serialize and deserialize user
passport.serializeUser((user, done) => {
  done(null, user)
})

passport.deserializeUser(function(obj, done) {
  done(null, obj)
})

// set up passport using LineStrategy
passport.use(
  new passportLine.Strategy(
    {
      channelID: LINE_CHANNEL_ID,
      channelSecret: LINE_CHANNEL_SECRET,
      callbackURL: CALLBACK_URL,
    },
    (accessToken, refreshToken, profile, done) => {
      return done(null, profile)
    }
  )
)

/** set up express part */

// init passport
app.use(passport.initialize())
app.use(passport.session())

/** routes part */

// authenticate with line service
app.get('/auth/line', passport.authenticate(passportLine.NAME))

/**
 * line service will redirect to this callback api
 * if failed, goto /login
 * if pass, redirect to /
*/
app.get('/auth/line/callback',
  passport.authenticate(passportLine.NAME, { failureRedirect: '/login' }),
  (req, res) => {
    res.redirect('/')
  }
)

License

MIT