fix(server): use post request to consume magic link token (#6656)

packages/backend/server/src/core/auth/controller.ts

@@ -31,6 +31,11 @@ class SignInCredential {
   password?: string;
 }
 
+class MagicLinkCredential {
+  email!: string;
+  token!: string;
+}
+
 @Throttle('strict')
 @Controller('/api/auth')
 export class AuthController {
@@ -90,7 +95,7 @@ export class AuthController {
   ) {
     const token = await this.token.createToken(TokenType.SignIn, email);
 
-    const magicLink = this.url.link('/api/auth/magic-link', {
+    const magicLink = this.url.link('/magic-link', {
       token,
       email,
       redirect_uri: redirectUri,
@@ -129,20 +134,16 @@ export class AuthController {
   }
 
   @Public()
-  @Get('/magic-link')
+  @Post('/magic-link')
   async magicLinkSignIn(
     @Req() req: Request,
     @Res() res: Response,
-    @Query('token') token?: string,
-    @Query('email') email?: string,
-    @Query('redirect_uri') redirectUri = this.url.home
+    @Body() { email, token }: MagicLinkCredential
   ) {
     if (!token || !email) {
-      throw new BadRequestException('Invalid Sign-in mail Token');
+      throw new BadRequestException('Missing sign-in mail token');
     }
 
-    email = decodeURIComponent(email);
-    token = decodeURIComponent(token);
     validators.assertValidEmail(email);
 
     const valid = await this.token.verifyToken(TokenType.SignIn, token, {
@@ -150,7 +151,7 @@ export class AuthController {
     });
 
     if (!valid) {
-      throw new BadRequestException('Invalid Sign-in mail Token');
+      throw new BadRequestException('Invalid sign-in mail token');
     }
 
     const user = await this.user.fulfillUser(email, {
@@ -160,7 +161,7 @@ export class AuthController {
 
     await this.auth.setCookie(req, res, user);
 
-    return this.url.safeRedirect(res, redirectUri);
+    res.send({ id: user.id, email: user.email, name: user.name });
   }
 
   @Throttle('default', { limit: 1200 })

packages/backend/server/src/core/auth/token.ts

@@ -70,14 +70,17 @@ export class TokenService {
       !expired && (!record.credential || record.credential === credential);
 
     if ((expired || valid) && !keep) {
-      await this.db.verificationToken.delete({
+      const deleted = await this.db.verificationToken.deleteMany({
         where: {
-          type_token: {
           token,
           type,
         },
-        },
       });
+
+      // already deleted, means token has been used
+      if (!deleted.count) {
+        return null;
+      }
     }
 
     return valid ? record : null;

packages/backend/server/src/fundamentals/utils/request.ts

@@ -26,7 +26,7 @@ export function getRequestResponseFromHost(host: ArgumentsHost) {
       const ws = host.switchToWs();
       const req = ws.getClient<Socket>().client.conn.request as Request;
 
-      const cookieStr = req?.headers?.cookie;
+      const cookieStr = req?.headers?.cookie ?? '';
       // patch cookies to match auth guard logic
       if (typeof cookieStr === 'string') {
         req.cookies = cookieStr.split(';').reduce(

packages/backend/server/tests/auth/controller.spec.ts

@@ -69,13 +69,15 @@ test('should be able to sign in with email', async t => {
   t.is(res.body.email, u1.email);
   t.true(mailer.sendSignInMail.calledOnce);
 
-  let [signInLink] = mailer.sendSignInMail.firstCall.args;
+  const [signInLink] = mailer.sendSignInMail.firstCall.args;
   const url = new URL(signInLink);
-  signInLink = url.pathname + url.search;
+  const email = url.searchParams.get('email');
+  const token = url.searchParams.get('token');
 
   const signInRes = await request(app.getHttpServer())
-    .get(signInLink)
-    .expect(302);
+    .post('/api/auth/magic-link')
+    .send({ email, token })
+    .expect(201);
 
   const session = await getSession(app, signInRes);
   t.is(session.user!.id, u1.id);
@@ -95,13 +97,15 @@ test('should be able to sign up with email', async t => {
   t.is(res.body.email, 'u2@affine.pro');
   t.true(mailer.sendSignUpMail.calledOnce);
 
-  let [signUpLink] = mailer.sendSignUpMail.firstCall.args;
+  const [signUpLink] = mailer.sendSignUpMail.firstCall.args;
   const url = new URL(signUpLink);
-  signUpLink = url.pathname + url.search;
+  const email = url.searchParams.get('email');
+  const token = url.searchParams.get('token');
 
   const signInRes = await request(app.getHttpServer())
-    .get(signUpLink)
-    .expect(302);
+    .post('/api/auth/magic-link')
+    .send({ email, token })
+    .expect(201);
 
   const session = await getSession(app, signInRes);
   t.is(session.user!.email, 'u2@affine.pro');

packages/frontend/core/src/pages/magic-link.tsx

@@ -0,0 +1,40 @@
+import { type LoaderFunction, redirect } from 'react-router-dom';
+
+export const loader: LoaderFunction = async ({ request }) => {
+  const url = new URL(request.url);
+  const queries = url.searchParams;
+  const email = queries.get('email');
+  const token = queries.get('token');
+  const redirectUri = queries.get('redirect_uri');
+
+  if (!email || !token) {
+    return redirect('/404');
+  }
+
+  const res = await fetch('/api/auth/magic-link', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({ email, token }),
+  });
+
+  if (!res.ok) {
+    let error: string;
+    try {
+      const { message } = await res.json();
+      error = message;
+    } catch (e) {
+      error = 'failed to verify sign-in token';
+    }
+    return redirect(`/signIn?error=${encodeURIComponent(error)}`);
+  }
+
+  location.href = redirectUri || '/';
+  return null;
+};
+
+export const Component = () => {
+  // TODO: loading ui
+  return null;
+};

packages/frontend/core/src/router.tsx

@@ -76,6 +76,10 @@ export const topLevelRoutes = [
         path: '/signIn',
         lazy: () => import('./pages/sign-in'),
       },
+      {
+        path: '/magic-link',
+        lazy: () => import('./pages/magic-link'),
+      },
       {
         path: '/open-app/:action',
         lazy: () => import('./pages/open-app'),