Re: Bad request (400) if made in my server

someoneknew

Hey! I am getting the same error when I try to get token through "https://api.dropboxapi.com/oauth2/token". It works in postman but when I try to access this route with header and request body with my node js website, it throws that error. I am not using Dropbox SDK for node. I am trying to replicate/learn from "nodegallerytutorial" posted on git, and in there I found this coode:

 

  //Exchange code for token
  if(req.query.code ){

  	let options={
  		url: config.DBX_API_DOMAIN + config.DBX_TOKEN_PATH, 
      //build query string
      qs: {'code': req.query.code, 
      'grant_type': 'authorization_code', 
      'client_id': config.DBX_APP_KEY, 
      'client_secret':config.DBX_APP_SECRET,
      'redirect_uri':config.OAUTH_REDIRECT_URL}, 
      method: 'POST',
      json: true 
    }

    try{

    	let response = await rp(options);

      //we will replace later cache with a proper storage
			//mycache.set("aTempTokenKey", response.access_token, 3600);
			await regenerateSessionAsync(req);
			req.session.token = response.access_token;

      res.redirect("/");

    }catch(error){
    	return next(new Error('error getting token. '+error.message));
    }        
  }
}

promise-request is deprecated now, so I tired using node-fetch and axios. Here is code that I am using for the same path (the callback path I mentioned in my dropbox console).

 

 

// here the version of the code that I used with axios
app.get("/callback", async (req,res)=>{

    try {
        const body = {
            grant_type: "authorization_code",
            code: req.query.code,
            redirect_uri: "http://localhost:3000/callback",
            client_id: client_id,
            client_secret: client_id,
            json:true
        };

      const response = axios.post("https://api.dropboxapi.com/oauth2/token", body);
      console.log({response});
      res.send({response});
    } catch(err)
    {
        res.send({error: err});
    }    

});



// below is the code for node-fetch that I used
app.get("/callback",  (req,res)=>{



        const body = {
            grant_type: "authorization_code",
            code: req.query.code,
            redirect_uri: "http://localhost:3000/callback",
            client_id: client_id,
            client_secret: client_secret

        };
        node_fetch("https://api.dropboxapi.com/oauth2/token", {
            method:'POST',
            body         
        }).then((response)=> response.json()).then((jsonObj)=>{
            res.send({response:jsonObj});
        }).catch((err)=>{
            res.send({err});
        });
});

Here is the error. Please note that everything works fine when I use psotman.

 

kylea

[Cross-linking for reference: https://stackoverflow.com/questions/66144019/dropbox-400-error-while-trying-to-get-token-auth ]

 

The Dropbox API will return a more specific error message in the response body; print the full response body to see the cause.

 

Typically, an HTTP status 400 suggests that the body of the request is malformed - but the more specific message will help diagnose this.