web: Fix login session persistence using localStorage.

web/package.json

@@ -13,12 +13,14 @@
     "@fortawesome/free-solid-svg-icons": "^5.7.2",
     "@fortawesome/vue-fontawesome": "^0.1.5",
     "@types/js-cookie": "^2.2.1",
+    "@types/jwt-decode": "^2.2.1",
     "@types/lodash.assign": "^4.2.6",
     "@types/lodash.findindex": "^4.6.6",
     "@types/lodash.merge": "^4.6.5",
     "apexcharts": "^3.6.5",
     "axios": "^0.18.0",
     "js-cookie": "^2.2.0",
+    "jwt-decode": "^2.2.0",
     "keen-ui": "^1.1.2",
     "lodash.assign": "^4.2.0",
     "lodash.findindex": "^4.6.0",

web/src/router.ts

@@ -6,9 +6,12 @@ import Measures from '@/views/Measures.vue';
 import UserAccount from '@/views/UserAccount.vue';
 import QuickPanels from '@/views/QuickPanels.vue';
 import { authStore } from '@/store';
+import { logService } from '@/services/logging';
 
 Vue.use(Router);
 
+const logger = logService.getLogger('/router');
+
 const router = new Router({
   mode: 'history',
   base: process.env.BASE_URL,
@@ -20,7 +23,8 @@ const router = new Router({
     {
       path: '/login',
       name: 'login',
-      component: Login
+      component: Login,
+      props: (route) => ({ redirect: route.query.redirect })
     },
     {
       path: '/measures',
@@ -43,12 +47,26 @@ const router = new Router({
   ]
 });
 
+async function getAuthToken(): Promise<string | null> {
+  if (authStore.authToken) { return authStore.authToken; }
+
+  logger.trace('Checking for an existing API token.');
+  try {
+    const token = await authStore.findLocalToken();
+    return token;
+  }
+  catch (e) {
+    logger.info('Could not find a valid token.', e);
+    return null;
+  }
+}
+
 // Auth filter
-router.beforeEach((to, from, next) => {
+router.beforeEach(async (to, from, next) => {
   if (to.matched.some((record) => record.meta.requiresAuth)) {
-    if (!authStore.authToken) {
-      next({ name: 'login' });
-        // params: { redirect: to.path } });
+    const token = await getAuthToken();
+    if (!token) {
+      next({ name: 'login', query: { redirect: to.path } });
     } else { next(); } // if authed
   } else { next(); } // if auth required
 });

web/src/store-modules/auth.ts

@@ -4,38 +4,72 @@ import {
   Mutation,
   VuexModule
 } from 'vuex-module-decorators';
-import Cookies from 'js-cookie';
+import JwtDecode from 'jwt-decode';
 import { LoginSubmit } from '@/models';
 import api from '@/services/pm-api-client';
 import { logService } from '@/services/logging';
 import { userStore, measureStore } from '@/store';
 
-const COOKIE_TOKEN = 'pm-api-cookie-token';
+const SESSION_KEY = 'session-token';
 
-const log = logService.getLogger('/store-modules/auth');
+const logger = logService.getLogger('/store-modules/auth');
+
+export interface SessionToken {
+  iat: string;
+  exp: number;
+  sub: string;
+}
 
 @Module({ namespaced: true, name: 'auth' })
 export class AuthStoreModule extends VuexModule {
   public authToken: string | null = null;
 
-  @Action({ commit: 'SET_TOKEN', rawError: true })
-  public async login(creds: LoginSubmit) {
+  @Action({ rawError: true })
+  public async login(creds: LoginSubmit): Promise<string> {
     const authToken = await api.createAuthToken(creds); // API will cache this token
-    Cookies.set(COOKIE_TOKEN, authToken, { secure: true });
-    await userStore.fetchUser();
-    await measureStore.fetchAllMeasures();
-    log.trace('User login successful.');
+
+    // this should be guaranteed by the server (redirect HTTP -> HTTPS)
+    // but we'll do a sanity check just to make sure.
+    if (window.location.protocol === 'https:') {
+      localStorage.setItem(SESSION_KEY, authToken);
+    }
+
+    logger.trace('User login successful.');
+    this.context.commit('SET_TOKEN', authToken);
+
+    this.loadInitialState();
     return authToken;
   }
 
-  @Action({ commit: 'SET_TOKEN', rawError: true })
-  public async findLocalToken() {
-    const token = Cookies.get(COOKIE_TOKEN);
-    if (token) { return token; }
-    else { throw new Error('No auth token stored as a cookie.'); }
+  @Action({ rawError: true })
+  public async findLocalToken(): Promise<string> {
+    const encodedToken = localStorage.getItem(SESSION_KEY);
+    if (!encodedToken) {
+      logger.trace('encodedToken was falsey');
+      throw new Error('Could not find an existing auth token.');
+    }
+
+    const token = JwtDecode<SessionToken>(encodedToken);
+    if ((new Date(token.exp * 1000)) < new Date()) {
+      logger.trace('token has expired: token.exp = ' + (token.exp * 1000));
+      throw new Error ('The existing auth token has expired.');
+    }
+
+    api.setAuthToken(encodedToken);
+    this.context.commit('SET_TOKEN', encodedToken);
+
+    this.loadInitialState();
+    return encodedToken;
+  }
+
+  @Action
+  public async loadInitialState() {
+    userStore.fetchUser();
+    measureStore.fetchAllMeasures();
   }
 
   @Mutation private SET_TOKEN(t: string) {
+    logger.info('SET_TOKEN called');
     this.authToken = t;
   }
 }

web/src/views/login.ts

@@ -4,10 +4,10 @@ import { LoginSubmit } from '@/models';
 import { authStore } from '@/store';
 import { logService } from '@/services/logging';
 
-const log = logService.getLogger('/views/login');
+const logger = logService.getLogger('/views/login');
 
 @Component({})
-export default class Login extends Vue {
+export class Login extends Vue {
 
   private loginForm: LoginSubmit = {
     email: '',
@@ -16,7 +16,7 @@ export default class Login extends Vue {
 
   private waiting = false;
   private flashMessage = '';
-  private  redirect: string | undefined = undefined;
+  @Prop() private redirect!: string | null;
 
   public async login() {
     this.waiting = true;
@@ -29,18 +29,13 @@ export default class Login extends Vue {
         this.flashMessage = 'invlid username or password';
       } else {
         this.flashMessage = 'unable to log you in';
-        log.error(e);
+        logger.error(e);
       }
     }
     this.waiting = false;
   }
-
-  /*
-  @Watch('$route', { immediate: true })
-  private onRouteChange(route: Route) {
-    this.redirect = route.query && route.query.redirect as string;
-  }
-  */
 }
 
 // TODO: styling of flash message
+
+export default Login;