ClientConfigurationError Microsoft OAuth Flow

Question

I am implementing the Microsoft Auth code flow but I am stuck with this error.

Based on this code example, here is how I am initializing the client:

   const config = {  
     auth: {  
       clientId: process.env.MICROSOFT_CLIENT_ID,  
       authority: process.env.MICROSOFT_AUTHORITY,  
       clientSecret: process.env.MICROSOFT_CLIENT_SECRET,  
     },  
   };  
   const cca = new msal.ConfidentialClientApplication(config);  

And later I want to create an authentication URL to redirect the user to:

   const authCodeUrlParameters = {  
       scopes: ["user.read"],  
       redirectUri: "http://localhost:8080/oauth/microsoft",  
       state: 'state_here',  
     };  
     
     cca  
       .getAuthCodeUrl(authCodeUrlParameters)  
       .then((authCodeUrl) => {  
         return authCodeUrl;  
       })  
       .catch((error) => console.log(JSON.stringify(error)));  

But I am getting this error: {"errorCode":"empty_url_error","errorMessage":"URL was empty or null.","subError":"","name":"ClientConfigurationError"}

Based on the docs about errors, it looks like it's thrown before requests are made when the given user config parameters are malformed or missing.

Anybody can spot where the configs are malformed?

Answer 1

Hi @Edo ,

Thanks for reaching out.

The error you are getting is due to the missing configuration in the application.
In this above-mentioned code block, the application uses MSAL to obtain an authorization code request URL which require state and nonce parameters from cache as part of authCodeUrlParameters to construct the URL.
These cached values need to be passed as part of authCodeResponse in ClientApplicaiton.acquireTokenByCode API call, to be validated before the authorization code is sent to the server in exchange for an access token.

Here in authCodeUrlParameters those values are missing which constructs the empty URL.

Hope this will help to construct the correct URL.

Thanks,
Shweta

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