Simple nodejs server, that receives request with _escaped_fragment_ parameter, and renders back client-side gererated html from given host. Useful for single-page apps, with hashbang-style routes, to make them crawlable, and bot-friendly. (Read this great article for details: http://pivotallabs.com/seo-friendly-single-page-apps-in-rails/).

bot-mate.js

//  Bot-mate by Zero.One (http://www.zeroone.st)
//  Simple nodejs server, that receives request with _escaped_fragment_ parameter, and renders back client-side gererated html from given host.
//  Useful for single-page apps, with hashbang-style routes, to make them crawlable, and bot-friendly. 
//  (Read this great article for details: http://pivotallabs.com/seo-friendly-single-page-apps-in-rails/)
//
//  Requirements: node and phantomjs in your PATH.
//  TODO: Exception handling
//  TODO: Caching support
//  TODO: Add Nginx and Apache config example
// 
//  Usage: 
//          $ node bot-mate.js 'http://example.com'
// 
var exec = require('child_process').exec,
    http = require('http'),
    url = require('url');

http.createServer(function (req, res) {
    var child, query;
    query = url.parse(req.url,true).query;
    host_url = process.argv[2] + '/#!' + query['_escaped_fragment_']
    console.log('Processing url: ', host_url);
    child = exec("phantomjs page-content.js '" + host_url + "'", function (error, stdout, stderr) {
        res.writeHead(200, {'Content-Type': 'text/html'});
        res.write(stdout, 'utf-8');
        res.end("\n");
        console.log('Success!');
    });
}).listen(1337, '127.0.0.1');
console.log("Proxy listening at http://127.0.0.1:1337");

page-content.js

//  Simple Phantomjs script that takes given url, makes request and renders received document's innerHtml to stdout
//
//  Usage: 
//          $ phantomjs page-content.js 'http://example.com'
//
var page = require('webpage').create(),
  system = require("system");
page.open(system.args[1], function (status) {
    console.log(page.content);
    phantom.exit();
});