From ee1c7820c3705a1e1a27307c0dfe1e6577ed5d9e Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Fri, 12 Jun 2026 23:33:47 -0400
Subject: [PATCH] x

---
 apps/backend/src/routes/line.ts | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/apps/backend/src/routes/line.ts b/apps/backend/src/routes/line.ts
index cbd63bb..af2781b 100644
--- a/apps/backend/src/routes/line.ts
+++ b/apps/backend/src/routes/line.ts
@@ -4,6 +4,11 @@ import { lineConfig, lineClient } from '../lib/lineClient';
 import crypto from 'crypto';
 
 export const lineRoutes = new Elysia({ prefix: '/line' })
+  .onParse(async ({ request, contentType }) => {
+    if (contentType?.includes('application/json')) {
+      return await request.text();
+    }
+  })
   .post('/webhook', async ({ request, body, set }) => {
     // 1. Verify Signature
     const signature = request.headers.get('x-line-signature');
@@ -12,9 +17,7 @@ export const lineRoutes = new Elysia({ prefix: '/line' })
       return { error: 'Missing Signature' };
     }
     
-    // In Elysia, application/json is automatically parsed into an object.
-    // We stringify it back to a string for signature validation.
-    // Note: This works if the original payload didn't have special formatting spaces.
+    // In our onParse hook, we intercepted the body and returned it as a raw text string.
     const rawBody = typeof body === 'string' ? body : JSON.stringify(body);
 
     if (!rawBody) {
@@ -62,6 +65,4 @@ export const lineRoutes = new Elysia({ prefix: '/line' })
       set.status = 500;
       return { error: 'Webhook processing failed' };
     }
-  }, {
-    type: 'text'
   });