Function toExpressMiddleware

packages/express/src/middleware.ts:355–375

(ctx: Context)

 * @param ctx - Context object to discover registered middleware
 */
export function toExpressMiddleware(ctx: Context): ExpressRequestHandler {
  return (req, res, next) => {
    const middlewareCtx = new MiddlewareContext(req, res, ctx);

    new Promise((resolve, reject) => {
      // eslint-disable-next-line no-void
      void (async () => {
        try {
          const result = await invokeMiddleware(middlewareCtx);
          resolve(result);
        } catch (err) {
          reject(err);
        }
      })();
    })
      .then(result => {
        if (result !== res) next();
      })
      .catch(next);
  };
}