From a4ff394695fcd0a00ca9242151625628b170b277 Mon Sep 17 00:00:00 2001
From: kuekhaoyang <kuekhaoyang@Gmail.com>
Date: Sat, 29 Nov 2025 14:23:37 +0800
Subject: [PATCH] fix: Change OAuth token request body to
 `x-www-form-urlencoded` format.

---
 app/api/oauth/callback/route.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/app/api/oauth/callback/route.ts b/app/api/oauth/callback/route.ts
index 92799bb..66c2ad7 100644
--- a/app/api/oauth/callback/route.ts
+++ b/app/api/oauth/callback/route.ts
@@ -25,14 +25,16 @@ export async function GET(request: NextRequest) {
         console.log('[OAuth Callback] Exchanging code for token...');
         const tokenResponse = await fetch('https://connect.linux.do/oauth2/token', {
             method: 'POST',
-            headers: { 'Content-Type': 'application/json' },
-            body: JSON.stringify({
+            headers: {
+                'Content-Type': 'application/x-www-form-urlencoded',
+            },
+            body: new URLSearchParams({
                 client_id: CLIENT_ID,
                 client_secret: CLIENT_SECRET,
                 code,
                 redirect_uri: REDIRECT_URI,
                 grant_type: 'authorization_code',
-            }),
+            }).toString(),
         });
 
         const tokenData = await tokenResponse.json();