Minimal development proxy middleware for NodeJS. Usable to complete BrowserSync with a customized proxy.

proxy.js

// Basic development proxy middleware for NodeJS.
//
// You may use it with BrowserSync to proxy some paths
// to another service. Example of BrowserSync conig:
//
//   browserSync({
//     server: {
//      baseDir: 'dist',
//      middleware: function(req, res, next) {
//        proxy('/api/', 127.0.0.1', 9292, req, res, next);
//      }
//    }
//  });

var http = require('http');

var proxy = function(path, host, port, req, res, next) {
  var regex = new RegExp(path);
  if (!req.url.match(regex)) {
    console.log(req.url + ' doesn\'t match ' + path);
    next();
    return;
  }

  var proxyRequest = function(req, res, next) {
    console.log('proxy request ' + req.url + ' to ' + host + ':' + port + req.url);
    var options = {
      host: host,
      port: port,
      path: req.url,
      headers: req.headers,
      method: req.method
    };
    callback = function(proxyRes) {
      proxyRes.on('data', function(chunk) {
        res.write(chunk);
      });
      proxyRes.on('end', function () {
        res.end();
      });
    };
    var proxyReq = http.request(options, callback);
    req.on('data', function(chunk) {
      proxyReq.write(chunk);
    });
    req.on('end', function() {
      proxyReq.end();
    });
    proxyReq.end();
  };

  proxyRequest(req, res, next);
};

module.exports = proxy;