Sign users in to a Nuxt application

This guide explains how to add Casdoor sign-in to a Nuxt application and how to keep signed-out users away from protected routes. The steps mirror the Next.js guide.

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Learning outcomes

• Initialize casdoor-js-sdk in a Nuxt application.
• Send users to the Casdoor sign-in page and handle the callback.
• Protect routes with Nuxt middleware.

What you need

• A running Casdoor instance. See Install the Casdoor server.
• An application in Casdoor
• A Nuxt application

Sample code

• nuxt-auth

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Configure the SDK

1. Install casdoor-js-sdk:

   npm install casdoor-js-sdk
   # or: yarn add casdoor-js-sdk

2. Define the configuration of the SDK. All settings are strings and all are required.

   Parameter	Required	Description
   serverUrl	Yes	Casdoor server URL (e.g. http://localhost:8000).
   clientId	Yes	Application client ID.
   clientSecret	Yes	Application client secret.
   organizationName	Yes	Organization name.
   appName	Yes	Application name.
   redirectPath	Yes	Callback path (e.g. /callback).

   const sdkConfig = {
     serverUrl: "https://door.casdoor.com",
     clientId: "294b09fbc17f95daf2fe",
     clientSecret: "dd8982f7046ccba1bbd7851d5c1ece4e52bf039d",
     organizationName: "casbin",
     appName: "app-vue-python-example",
     redirectPath: "/callback",
   };

   Replace serverUrl, clientId, and clientSecret with the values of your own Casdoor instance and application.

3. In the Casdoor admin console, add the callback URL of your application, for example http://localhost:8080/callback, to the Redirect URLs of the application.

Sign the user in

1. Send the user to the Casdoor sign-in page:

   const CasdoorSDK = new Sdk(sdkConfig);
   CasdoorSDK.signin_redirect();

2. After the user signs in, Casdoor redirects to redirectPath with an authorization code. On that page, exchange the code for an access token, read the user, and store the user in a cookie:

   CasdoorSDK.exchangeForAccessToken()
     .then((res) => {
       if (res && res.access_token) {
         return CasdoorSDK.getUserInfo(res.access_token);
       }
     })
     .then((res) => {
       Cookies.set("casdoorUser", JSON.stringify(res));
     });

For the other functions of the SDK, see Sign users in with a Casdoor SDK.

Protect routes with middleware

Nuxt middleware runs before a route renders and can redirect.

1. Create a .js or .ts file in the middleware directory. The file name is the name of the middleware: myMiddleware.js defines myMiddleware.

   const protectedRoutes = ["/profile"];
   
   export default function ({ route, redirect }) {
     if (protectedRoutes.includes(route.path)) {
       redirect('/login');
     }
   }

2. Turn on the middleware in nuxt.config.js:

   export default {
     router: {
       middleware: ['myMiddleware']  // your middleware name
     },
   }

3. In the middleware, treat a request with the casdoorUser cookie as signed in, and redirect all other requests away from the protected routes:

   import Cookies from "js-cookie";
   
   const protectedRoutes = ["/profile"];
   
   export default function ({ route, redirect }) {
     const casdoorUserCookie = Cookies.get('casdoorUser');
     const isAuthenticated = !!casdoorUserCookie;
   
     if (!isAuthenticated && protectedRoutes.includes(route.path)) {
       redirect('/login');
     }
   }

See also

• Sign users in to a Next.js application
• Sign users in to a Vue application
• Sign users in with a Casdoor SDK