For middlewares

packages/slackbot-proxy/src/middlewares/GlobalHttpErrorHandlingMiddleware.ts

@@ -0,0 +1,28 @@
+import {
+  Err, Middleware, Next, PlatformContext, PlatformResponse,
+} from '@tsed/common';
+
+import { HttpError, isHttpError } from 'http-errors';
+
+@Middleware()
+export class GlobalHttpErrorHandlingMiddleware {
+
+  use(@Err() err: unknown, @Next() next: Next, ctx: PlatformContext): PlatformResponse<any>|void {
+
+    // handle if the err is a HttpError instance
+    if (isHttpError(err)) {
+      const httpError = err as HttpError;
+      const { response } = ctx;
+
+      return response
+        .status(httpError.status)
+        .body({
+          status: httpError.status,
+          message: httpError.message,
+        });
+    }
+
+    next(err);
+  }
+
+}