express js code results invalid JSON output when I provide authorization code to get access token

[Natnael Tamrat]

const express=require('express')

const fetch=require('node-fetch')

var cookieParser = require('cookie-parser');

const app =express()app.use(express.text());

app.use(cookieParser());

const clientId = "Z7SnfR0hygWOK4PQ42L7F8Mfb0l6QyJs"

const clientSecret = "pz2ktUf6eQ5tAW30YGikbxEsvGumpoZY15kh0RU1TQE2JAywivNEMPtiMWB34B49"

const YOUR_USER_BOUND_VALUE="3sdssdw453hh3"

app.get('/login',(req,res)=>{const url = `http://auth.atlassian.com/authorize?audience=api.atlassian.com&client_id=Z7SnfR0hygWOK4PQ42L7F8Mfb0l6QyJs&scope=read%3Ajira-user&redirect_uri=http%3A%2F%2Flocalhost%3A5000%2Flogin%2Fjira%2Fcallback&state=${YOUR_USER_BOUND_VALUE}&response_type=code&prompt=consent`res.redirect(url);//res.send("hello");

https://natnael-tamrat.atlassian.net/plugins/servlet/oauth/access-token})

async function getAccessToken(code){    

const res= await fetch(``,{     

   method:"POST",  

  headers: {        "Content-Type":"application/json"    },  

      body :{"grant_type":"authorization_code" ,"client_id": `${clientId}`,"client_secret":`${clientSecret}`,"code":`${code}`,"redirect_uri": "https://localhost:5000/login/jira/callback"}    })        const data =await res.text();       

 console.log(data);

    //const params=new URLSearchParams(data)    

return data//params.get('oauth_token')}

app.get('/login/jira/callback',async (req,res)=>{    const code =req.query.code   

     const token =await getAccessToken(code)  

  res.send(token);    //res.send(token);})

const PORT= process.env.PORT || 5000app.listen(PORT ,()=>{    console.log("listening on port 5000");})

[Daniel Eads]

Hi @Natnael Tamrat !

Firstly, I see that Dario assisted you with your question last week about using Basic Auth , and that he mentioned the dedicated Developer Community might be good to check out for development related questions. Since the topics are more focused, it's easier for other developers to watch the questions coming in and provide guidance.

For your specific issue - I'm not a javascript developer, but it looks to me like you may be manually trying to generate a JSON Web Token. Our documentation has information about using JWT with Jira that would be a good place to start.

More specifically though - we do provide a javascript library for interacting with Atlassian-generated JWTs that I highly recommend integrating into your app. This should simplify your code, as well as guarantee the tokens are being generated in the way Jira expects.

Hope that helps give a solid pointer!
Daniel | Atlassian Community