nodecloud-gateway

nodecloud-gateway is a gateway component in microsoft service system. It is inspired by Zuul. It is based on koa middleware mechanism.

The lib is developing without any production verifications

Get Started

Install it via npm:

npm install --save nodecloud-gateway

Implements a filter extends PreGatewayFilter(or AbstractGatewayFilter, RouteGatewayFilter, PostGatewayFilter).

The filter which extends PreGatewayfilter will be executed first. The following filters extend RouteGatewayFilter and PostGatewayFilter classes.

import {PreGatewayFilter} from 'nodecloud-gateway';
 
export default class DebugPreGatewayFilter extends PreGatewayFilter {
    constructor(app) {
        super(app);
    }
 
    // Likes the koa middleware
    async action(ctx) {
        ctx.set('x-gateway', true);
    }
}

Use it with koa framework:

import Koa from 'koa';
import {NodeGateway} from 'nodecloud-gateway';
 
import DebugPreGatewayFilter from './DebugPreGatewayFilter'
 
const gateway = new NodeGateway();
const app = new Koa();
 
// All responses have the header 'x-gateway: true'
gateway.init(app, [DebugPreGatewayFilter])
 
// other koa logic and middlewares
app.listen(3000);

Use it with nodecloud-boot, and You must create routeConfig

import NCBoot from 'nodecloud-boot';
import Koa from 'koa';
import {NodeGateway} from 'nodecloud-gateway';
 
const ncBoot = NCBoot.getInstance(__dirname);
const app = new Koa();
const gateway = new NodeGateway();
const routeConfig = {
    prefix: '/api',
    routes: {
      'service0': {
          path: '/example1/**'
      },
      'service1': {
          path: '/example/**',
          ignorePattern: /\/example\/a\//
      }
    }
};
 
ncBoot.initApp(()=>{
    // other koa logic and middlewares
    
    NodeGateway.initWithService(app, null, routeConfig, ncboot.client);
    return app.callback();
})