request pass through

gistfile1.js

var express = require('express'),
    underscore = require('underscore')._,
    httpRequest = require('request'),
    app = express.createServer(express.logger());

// For favicon requests just redirect them.
app.get('/favicon.ico', function (request, response) {
  // Set the appropriate content type
  response.writeHead(200, {
    'Content-Type': 'image/x-icon'
  });

  httpRequest({
    'uri' : 'http://example.com/favicon.ico',
    'responseBodyStream': response
  }, function (error, httpResponse, body) {
    var length = [];
    if (!error) {
      length =underscore.select(httpResponse.headers, function (item, index) {
        return index.toLowerCase() === 'content-length';
      });
      if (length.length) {
        // Hide connect's error throwing.
        response.headers['Content-Length'] = length[0];
        response.end();
      }
    }
  });
});
app.listen();