Function dispatch

framework/framework/server.ts:323–339

(i)

    let index = -1;
    context.__timers ||= {};
    function dispatch(i) {
        if (i <= index) return Promise.reject(new Error('next() called multiple times'));
        index = i;
        if (!middlewares[i]) return Promise.resolve();
        const name = middlewares[i].name;
        const fn = middlewares[i].func;
        context.__timers[`${name}.start`] = Date.now();
        try {
            return Promise.resolve(fn(context, dispatch.bind(null, i + 1))).finally(() => {
                context.__timers[`${name}.end`] = Date.now();
            });
        } catch (e) {
            return Promise.reject(e);
        } finally {
            context.__timers[`${name}.end`] = Date.now();
        }
    }
    return dispatch(0);
}