ember-cli/lib/tasks/server/middleware/proxy-server/index.js

Command line tool for developing ambitious ember.js apps

'use strict';

// eslint-disable-next-line
const isLiveReloadRequest = require('../../../../utilities/is-live-reload-request');

class ProxyServerAddon {
  constructor(project) {
    this.project = project;
    this.name = 'proxy-server-middleware';
  }

  serverMiddleware(options) {
    let app = options.app,
      server = options.options.httpServer;
    options = options.options;

    if (options.proxy) {
      let proxy = require('http-proxy').createProxyServer({
        target: options.proxy,
        ws: true,
        secure: options.secureProxy,
        changeOrigin: true,
        xfwd: options.transparentProxy,
        preserveHeaderKeyCase: true,
        proxyTimeout: options.proxyOutTimeout,
        timeout: options.proxyInTimeout,
      });

      proxy.on('error', (e, req, res) => {
        options.ui.writeLine(`Error proxying to ${options.proxy}`);
        options.ui.writeError(e);
        if (typeof res.status === 'function') {
          res.status(502);
          res.end();
        }
      });

      const morgan = require('morgan');

      options.ui.writeLine(`Proxying to ${options.proxy}`);

      server.on('upgrade', (req, socket, head) => {
        this.handleProxiedRequest({ req, socket, head, options, proxy });
      });

      app.use(morgan('dev'));
      app.use((req, res) => proxy.web(req, res));
    }
  }

  handleProxiedRequest({ req, socket, head, options, proxy }) {
    if (!isLiveReloadRequest(req.url, options.liveReloadPrefix)) {
      options.ui.writeLine(`Proxying websocket to ${req.url}`);
      socket.on('error', (e) => proxy.emit('error', e));
      proxy.ws(req, socket, head);
    }
  }
}

module.exports = ProxyServerAddon;