Middleware

The zely is based on the osik aimed at light weight and speed. Reading the osik documentation will help you understand.

#Middleware Usage

Middleware in Zely is a function that has access to the request object (req), the response object (res), and the next middleware function in the application’s request-response cycle. Here's an example of a middleware function:

import { Middleware } from 'zely';
 
export const Message: Middleware = (ctx, next) => {
  (ctx as any).message = 'Hello World!';
  next();
};

export default [
  GET((ctx) => {
    ctx.send(ctx.message);
  }),
];

This middleware function, named Message, adds a property message to the request object and assigns it the value 'Hello World!'. The next() function call is used to pass control to the next middleware function.

#Middleware Registration

To use the middleware, you need to add it to the config.middlewares array in your Zely configuration file:

import { Message } from './middlewares/message';
 
export default defineConfig({
  middlewares: [Message],
  // ...
});

#Page Middleware

You can create middleware that only works on a specific page.

import { middleware } from 'zely';
 
export default [
  middleware((ctx) => {
    ctx.num = 10;
  }),
  GET((ctx) => {
    return { number: ctx.num };
  }),
];

#Auto Mode

See next page.