zally-web-ui/src/server/dev/webpack-dev-server-proxy-handler.js

Zally API Linter Web UI

'use strict';

const request = require('request');
const path = require('path');

module.exports = function ({publicPath, protocol, host, port}) {
  /* eslint-disable no-console */
  return function (req, res, next) {
    const segment = path.join(publicPath, req.url);
    const url = `${protocol}://${host}:${port}${segment}`;
    const proxyReq = request(url);
    console.log(`proxying request to webpack dev server: ${url}`);

    proxyReq.on('response', (response) => {
      if (response.statusCode >= 400) {
        console.log(`webpack dev server could not handle ${url}, call "next" middleware`);
        next();
        return;
      }
      proxyReq.pipe(res);
    });
  };
};