Initial commit

src/shared/middleware/requestContext.ts

@@ -0,0 +1,25 @@
+import { randomUUID } from "node:crypto";
+import { Request, Response, NextFunction } from "express";
+import { env } from "../../config/env";
+
+declare module "express-serve-static-core" {
+  interface Request {
+    requestId: string;
+    traceId?: string;
+  }
+}
+
+export function requestContext(req: Request, _res: Response, next: NextFunction) {
+  const requestId =
+    (req.header(env.TRACE_HEADER) as string | undefined) ||
+    req.header("x-trace-id") ||
+    randomUUID();
+
+  const traceId =
+    (req.header("x-trace-id") as string | undefined) || requestId;
+
+  req.requestId = requestId;
+  req.traceId = traceId;
+
+  next();
+}