server.js

var http = require('http');
var Unblocker = require('unblocker');


var unblocker = Unblocker({});

http.createServer(function(req, res) {
    // first let unblocker try to handle the requests
    unblocker(req, res, function(err) {
        // this callback will be fired for any request that unblocker does not serve
        var headers = {'content-type': 'text/plain'};
        if (err) {
            res.writeHead(500, headers);
            return res.end(err.stack || err);
        }
        if (req.url == '/') {
            res.writeHead(200, headers);
            return res.end('Use the format http://thissite.com/proxy/http://site-i-want.com/ to access the proxy.');
        } else {
            res.writeHead(404, headers);
            return res.end('Error 404: file not found.');
        }
    });
}).listen(8080);

console.log('proxy server live at http://localhost:8080/')