LINE Login failed to get access token

Question

I am trying to create a LINE login authentication function on my web. The problem I am encountering is that I kept receiving error 400, a bad request which may have something to do with the parameter I've put in.

Here is my code,

    fetch('https://api.line.me/v2/oauth/accessToken', {
        method: 'POST',
        mode: 'no-cors',
        headers: {
          'Content-Type': 'application/x-www-form-urlencoded'
        },
        body: JSON.stringify({
            grant_type: 'authorization_code',
          client_id: 'my_id',
          client_secret: 'my_client_secret',
          code: code,
          redirect_uri: 'the link direct to'
        })
    }).then(response => {
      console.log(response);
    }).catch(function(err) {
      console.log(err);
    });

I followed the reference from LINE, https://developers.line.me/web-api/managing-access-tokens and put in the parameter it asked for, but I kept having the same error.

Tried with postman and got the same error

I am not sure which part I did wrong. Would someone help me with this issue?

Yes. Postman did give me the result. When I use the code above, I get 400 (bad request) — Hsin Hwang
Care to share with us the inputs for your postman query? E.g The Header and body. When you get http 400, is there other error messages in the response that can possibly be helpful? e.g. JSON.stringify(response) it — Samuel Toh
This is the only error message shows up. Also, I take it back. I actually tried postman again and it's giving me the same error. I guess I was trying with the api.line.me/v1/oauth/accessToken link which gives me the output, but v1 is deprecated according to the document. — Hsin Hwang

Jirawat Akkanit Jirawat Akkanit · Accepted Answer · 2018-05-29T23:30:17

I've got the same error 400 problem. In my case, my redirect_uri contains parameter e.g. mysite.com?action=abc which not work. It accept something like mysite.com/action/abc.

LINE Login failed to get access token

2 Answers