Restify proxy pattern using http-proxy. Uses restify server.pre() to setup a pattern to handle proxy requests before all middleware.

restify-proxy.js

/*
 * "restify": "^7.2.0",
 * "http-proxy": "^1.17.0",
 *
 * The restify server will proxy requests that match keys in a `proxies` config.
 *
 */
const restify = require('restify');
const httpProxy = require('http-proxy');

const proxiesConfig = {
  '/proxy': {
    url: 'http://www.proxiedService.com',
    whitelist: {
      GET: '/api/v1/users/'
    }
  }
};

/**
 * Every key in proxies becomes a proxy path on the server
 * ie. `/proxy` key becomes a path on the server - '/proxy'
 */
function setupProxies(proxies = {}) {
  // Setup proxy server if we have proxies
  const httpProxyServer = Object.keys(proxies).length > 0
    ? httpProxy.createProxyServer({})
    : undefined;

  return function proxiesMiddleware(req, res, next) {
    if (httpProxyServer === undefined) {
      return next();
    }

    const proxy = `/${req.url.split('/')[1]}`;

    if (
      (proxy in proxies) &&
      proxies[proxy].whitelist &&
      proxies[proxy].whitelist[method] &&
      Array.isArray(proxies[proxy].whitelist[method]) && 
      proxies[proxy].whitelist[method]
        .some(path => req.url.startsWith(`${proxy}${path}`))
    ) {
      req.url = req.url.substring(proxy.length);

      // complete the actual proxy'ing of the request
      httpProxyServer.web(req, res, {
        target: proxies[proxy].url,
      });
    } else {
      next();
    }
  };
};


const server = restify.createServer({
  name: 'proxy-test',
});

/*
 * Using server.pre() because it runs before all middleware.
 * http://restify.com/docs/server-api/#pre
 */
server.pre(setupProxies(proxiesConfig));

const port = process.env.PORT || 3000;
server.listen(port);
console.log(`Server is listening on port ${port}`);

//.....

/*
 * After starting the server you should be able to request to your proxy.
 *
 * $ curl http://localhost:3000/proxy/api/v1/users/1234
 * Would proxy to - http://www.proxiedService.com/api/v1/users/1234
 *
 */

Nice, do you maybe have an example of this in dockerized environment?

@vasx93 no i do not, that’s something i haven’t explored. please share if you do find something