Function invokeExpressMiddleware

packages/express/src/middleware.ts:331–348

(
  middlewareCtx: MiddlewareContext,
  ...handlers: ExpressRequestHandler[]
)

 * @param handlers - A list of Express middleware handler functions
 */
export function invokeExpressMiddleware(
  middlewareCtx: MiddlewareContext,
  ...handlers: ExpressRequestHandler[]
): ValueOrPromise<boolean> {
  if (handlers.length === 0) {
    throw new Error('No Express middleware handler function is provided.');
  }
  const middleware = toMiddleware(handlers[0], ...handlers.slice(1));
  debug(
    'Invoke Express middleware for %s %s',
    middlewareCtx.request.method,
    middlewareCtx.request.originalUrl,
  );
  // Invoke the middleware with a no-op next()
  const result = middleware(middlewareCtx, () => undefined);
  // Check if the response is finished
  return transformValueOrPromise(result, val => val === middlewareCtx.response);
}

/**
 * An adapter function to create an Express middleware handler to discover and