feat:版本迭代

backend/src/utils/index.ts

@@ -0,0 +1,21 @@
+import jwt from "jsonwebtoken";
+import { Request } from "express";
+import { config } from "../config";
+
+interface JwtPayload {
+  userId: string;
+}
+
+export function getUserIdFromToken(req: Request): string | null {
+  try {
+    const token = req.headers.authorization?.split(" ")[1];
+    if (!token) {
+      throw new Error("Token not found");
+    }
+    const decoded = jwt.verify(token, config.jwtSecret) as JwtPayload;
+    return decoded.userId;
+  } catch (error) {
+    console.error("Invalid token:", error);
+    return null;
+  }
+}