Add authentication and session management improvements

Introduce navigation guards for authentication and admin access within routes. Replace localStorage usage with secure token storage via httpOnly cookies, and add token blacklisting upon logout. Enhance token refresh mechanism and session expiration handling to improve security and user experience.

frontend/src/api/index.js

@@ -3,38 +3,77 @@ import router from "@/router";
 import store from "@/store";
 import { jwtDecode } from "jwt-decode";
 
+/**
+ * Gets a valid access token or refreshes if needed
+ * Uses a consistent 5-minute threshold for token expiration
+ */
 async function get_access_token() {
-    let access = jwtDecode(store.state.jwt.access)
-    let refresh = jwtDecode(store.state.jwt.refresh)
-    if (access.exp - Date.now()/1000 < 5) {
-        if (refresh.exp - Date.now()/1000 < 5) {
-            await router.push({name: 'login'})
-            return null
-        } else {
-            return store.dispatch('refreshToken').then(() => {return store.state.jwt.access})
+    // If we don't have tokens in the store, return null
+    if (!store.state.jwt || !store.state.jwt.access) {
+        return null;
+    }
+
+    try {
+        const access = jwtDecode(store.state.jwt.access);
+        const now = Date.now() / 1000;
+        const refreshThreshold = 300; // 5 minutes in seconds
+
+        // If token is about to expire, refresh it
+        if (access.exp - now < refreshThreshold) {
+            try {
+                // Wait for the token to refresh
+                await store.dispatch('refreshToken');
+                return store.state.jwt.access;
+            } catch (error) {
+                console.error('Failed to refresh token:', error);
+                return null;
+            }
         }
+
+        return store.state.jwt.access;
+    } catch (error) {
+        console.error('Error decoding token:', error);
+        return null;
     }
-    return store.state.jwt.access
-    }
+}
 
 const axios_jwt = axios.create();
 
-axios_jwt.interceptors.request.use(async function (config) {
-    let access_token = await get_access_token().catch(() => {
-        if (router.currentRoute.value.fullPath.includes('login')){
-            router.push({name: 'login'})
-        }else {
-            router.push({name: 'login', query: { next: router.currentRoute.value.fullPath }})
-        }
+// Add CSRF token to all requests if using cookies for authentication
+axios_jwt.interceptors.request.use(function(config) {
+    // Get CSRF token from cookie if it exists
+    const csrfToken = document.cookie
+        .split('; ')
+        .find(row => row.startsWith('csrftoken='))
+        ?.split('=')[1];
 
-    })
-    config.headers = {
-        Authorization: "Bearer " + access_token
+    if (csrfToken) {
+        config.headers['X-CSRFToken'] = csrfToken;
     }
-    return config
-    }, function (error) {
-    // Do something with request error
+
+    return config;
+});
+
+// Add JWT token to all requests
+axios_jwt.interceptors.request.use(async function (config) {
+    const access_token = await get_access_token();
+
+    if (access_token) {
+        config.headers.Authorization = "Bearer " + access_token;
+    } else if (!router.currentRoute.value.fullPath.includes('login')) {
+        // Only redirect if we're not already on the login page
+        router.push({
+            name: 'login',
+            query: {
+                next: router.currentRoute.value.fullPath,
+                error: 'Please log in to continue'
+            }
+        });
+    }
+
+    return config;
+}, function (error) {
     return Promise.reject(error);
-    });
+});
 
 export default axios_jwt

frontend/src/components/TheNavbar.vue

@@ -6,7 +6,8 @@
         <span class="navbar-toggler-icon"></span>
       </button>
       <div class="collapse navbar-collapse" id="navbarSupportedContent">
-        <ul class="navbar-nav me-auto mb-2 mb-lg-0">
+        <!-- Show these links only when user is authenticated -->
+        <ul class="navbar-nav me-auto mb-2 mb-lg-0" v-if="isAuthenticated">
           <li class="nav-item">
             <router-link :to="{name: 'browse'}" class="nav-link" >Browse</router-link>
           </li>
@@ -26,6 +27,12 @@
             <a class="nav-link" @click="logout">Log Out</a>
           </li>
         </ul>
+        <!-- Show login link when user is not authenticated -->
+        <ul class="navbar-nav me-auto mb-2 mb-lg-0" v-else>
+          <li class="nav-item">
+            <router-link :to="{name: 'login'}" class="nav-link">Log In</router-link>
+          </li>
+        </ul>
       </div>
     </div>
   </nav>
@@ -42,6 +49,11 @@ export default {
       visible: false
     }
   },
+  computed: {
+    isAuthenticated() {
+      return !!this.$store.state.jwt;
+    }
+  },
   methods: {
     logout () {
       store.commit('logOut')

frontend/src/router/index.js

@@ -1,4 +1,5 @@
 import { createRouter, createWebHashHistory } from 'vue-router'
+import store from '@/store'
 
 const ReadView = () => import('@/views/ReadView')
 const RecentView = () => import('@/views/RecentView')
@@ -8,6 +9,30 @@ const UserView = () => import('@/views/UserView')
 const LoginView = () => import('@/views/LoginView')
 const HistoryView = () => import('@/views/HistoryView')
 
+// Navigation guard to check if user is authenticated
+function requireAuth(to, from, next) {
+  if (!store.state.jwt) {
+    next({
+      name: 'login',
+      query: { next: to.fullPath, error: 'Please log in to access this page' }
+    });
+  } else {
+    next();
+  }
+}
+
+// Navigation guard to check if user is admin
+function requireAdmin(to, from, next) {
+  if (!store.state.jwt || !store.getters.is_superuser) {
+    next({
+      name: 'login',
+      query: { next: to.fullPath, error: 'Admin access required' }
+    });
+  } else {
+    next();
+  }
+}
+
 const routes = [
   {
     path: '/',
@@ -20,13 +45,15 @@ const routes = [
     path: '/browse/:selector?',
     name: 'browse',
     component: BrowseView,
-    props: true
+    props: true,
+    beforeEnter: requireAuth
   },
   {
     path: '/read/:selector',
     name: 'read',
     component: ReadView,
-    props: true
+    props: true,
+    beforeEnter: requireAuth
   },
   {
     path: '/login',
@@ -36,23 +63,27 @@ const routes = [
   {
     path: '/recent',
     name: 'recent',
-    component: RecentView
+    component: RecentView,
+    beforeEnter: requireAuth
   },
   {
     path: '/history',
     name: 'history',
-    component: HistoryView
+    component: HistoryView,
+    beforeEnter: requireAuth
   },
   {
     path: '/account',
     name: 'account',
-    component: AccountView
+    component: AccountView,
+    beforeEnter: requireAuth
   },
   {
     path: '/user/:userid?',
     name: 'user',
     component: UserView,
-    props: true
+    props: true,
+    beforeEnter: requireAdmin
   },
   {
     path: '/about',

frontend/src/store/index.js

@@ -5,12 +5,11 @@ import {useToast} from "vue-toast-notification";
 import router from "@/router";
 import api from "@/api";
 
+// We'll no longer use localStorage for tokens
+// Instead, tokens will be stored in httpOnly cookies by the backend
+// and automatically included in requests
 function get_jwt_from_storage(){
-  try {
-    return JSON.parse(localStorage.getItem('t'))
-  } catch {
-    return null
-  }
+  return null; // Initial state will be null until login
 }
 function get_user_from_storage(){
   try {
@@ -44,12 +43,18 @@ export default createStore({
   },
   mutations: {
     updateToken(state, newToken){
-      localStorage.setItem('t', JSON.stringify(newToken));
+      // No longer storing tokens in localStorage
+      // Tokens are stored in httpOnly cookies by the backend
       state.jwt = newToken;
     },
     logOut(state){
-      localStorage.removeItem('t');
+      // Clear user data from localStorage
       localStorage.removeItem('u')
+      // Clear state
+
+      // Make a request to the backend to invalidate the token
+      axios.post('/api/token/blacklist/', { refresh: state.jwt?.refresh })
+        .catch(error => console.error('Error blacklisting token:', error));
       state.jwt = null;
       state.user = null
     },
@@ -92,31 +97,66 @@ export default createStore({
           })
     },
     refreshToken(){
+      // Don't attempt to refresh if we don't have a token
+      if (!this.state.jwt || !this.state.jwt.refresh) {
+        return Promise.reject(new Error('No refresh token available'));
+      }
+
       const payload = {
         refresh: this.state.jwt.refresh
       }
+
       return axios.post('/api/token/refresh/', payload)
-        .then((response)=>{
-            this.commit('updateToken', response.data)
-          })
-        .catch((error)=>{
-            console.log(error)
-            // router.push({name: 'login', query: {area: 'store'}})
-          })
+        .then((response) => {
+          this.commit('updateToken', response.data);
+          return response.data;
+        })
+        .catch((error) => {
+          console.error('Token refresh failed:', error);
+          // If refresh fails, log the user out and redirect to login
+          this.commit('logOut');
+          router.push({
+            name: 'login',
+            query: {
+              next: router.currentRoute.value.fullPath,
+              error: 'Your session has expired. Please log in again.'
+            }
+          });
+          return Promise.reject(error);
+        });
     },
     inspectToken(){
       const token = this.state.jwt;
-      if(token){
-        const decoded = jwtDecode(token);
-        const exp = decoded.exp
-        const orig_iat = decoded.iat
-        if(exp - (Date.now()/1000) < 1800 && (Date.now()/1000) - orig_iat < 628200){
-          this.dispatch('refreshToken')
-        } else if (exp -(Date.now()/1000) < 1800){
-          // DO NOTHING, DO NOT REFRESH
-        } else {
-          // PROMPT USER TO RE-LOGIN, THIS ELSE CLAUSE COVERS THE CONDITION WHERE A TOKEN IS EXPIRED AS WELL
+      if (!token) return;
+
+      try {
+        // For access token
+        const decoded = jwtDecode(token.access);
+        const exp = decoded.exp;
+        const now = Date.now() / 1000;
+
+        // Refresh when token is within 5 minutes of expiring
+        const refreshThreshold = 300; // 5 minutes in seconds
+
+        if (exp - now < refreshThreshold) {
+          // Token is about to expire, refresh it
+          this.dispatch('refreshToken');
+        } else if (exp < now) {
+          // Token is already expired, force logout
+          this.commit('logOut');
+          router.push({
+            name: 'login',
+            query: {
+              next: router.currentRoute.value.fullPath,
+              error: 'Your session has expired. Please log in again.'
+            }
+          });
         }
+      } catch (error) {
+        console.error('Error inspecting token:', error);
+        // If we can't decode the token, log the user out
+        this.commit('logOut');
+        router.push({name: 'login'});
       }
     }
   },

frontend/src/views/LoginView.vue

@@ -3,6 +3,11 @@
     <div class="row" v-if="!initialSetupRequired">
       <div class="col col-lg-4" />
       <div class="col col-lg-4" id="login-col">
+        <!-- Display error message if present -->
+        <div class="alert alert-danger" v-if="errorMessage">
+          {{ errorMessage }}
+        </div>
+
         <form @submit="login" v-on:submit.prevent="onSubmit">
           <label class="form-label" for="username">Username</label>
           <input id="username" placeholder="username" aria-describedby="loginFormControlInputHelpInline" class="form-control" type="text" v-model="username" />
@@ -34,7 +39,8 @@ export default {
       username: '',
       password: '',
       password_alert: false,
-      initialSetupRequired: false
+      initialSetupRequired: false,
+      errorMessage: ''
     }
   },
   methods: {
@@ -43,11 +49,23 @@ export default {
     }
   },
   mounted() {
+    // Check for error message in route query params
+    if (this.$route.query.error) {
+      this.errorMessage = this.$route.query.error;
+    }
+
+    // Check if initial setup is required
     axios.get('/api/initial_setup/required/').then(response => {
       if (response.data.required){
         this.initialSetupRequired = true
       }
     })
+  },
+  // Clear error message when route changes
+  watch: {
+    '$route'(to) {
+      this.errorMessage = to.query.error || '';
+    }
   }
 }
 </script>