env middleware

The env middleware is used to inject some environment variables during the request process. The environment variables can be constants or values calculated according to the context.

Basic usage

import {Sener, Env, Router} from 'sener';

const router = new Router({
     '/demo': ({ env }) => {
         console.log(env.uid);
         return {};
     },
});

const env = {
     uid({ cookie }) {
         return cookie. get('COOKIE');
     },
     token: 'xxxxxx'
};

new Sener({
   middlewares: [router, new Env(env)],
});

The value of env can be of any type. When it is a function, it accepts an ISenerContext parameter, and the value will be calculated every request hook, so it can be used as an attribute.

ts type declaration

import {Sener, Env, Router, ISenerContext, IEnvMap} from 'sener';

const router = new Router({
     '/demo': ({ env }) => {
         console.log(env.uid);
         return {};
     },
});

const env = {
     uid ({ cookie }: ISenerContext) {
         return cookie. get('COOKIE');
     },
     token: 'xxxxxx'
};

declare module 'sener-extend' {
     interface ISenerEnv extends IEnvMap<typeof env> {}
}

new Sener({
   middlewares: [router, new Env(env)],
});