weseek__growi/apps/slackbot-proxy/src/middlewares/GlobalHttpErrorHandlingMiddleware.ts

import {
  Err,
  Middleware,
  Next,
  PlatformContext,
  PlatformResponse,
} from '@tsed/common';
import type { HttpError } from 'http-errors';
import { isHttpError } from 'http-errors';

@Middleware()
export class GlobalHttpErrorHandlingMiddleware {
  use(
    @Err() err: unknown,
    @Next() next: Next,
    ctx: PlatformContext,
  ): PlatformResponse | undefined {
    // 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);
  }
}