A proxy server by manipulating URLs, written based on the non-blocking Tornado.You can also check its PHP version and node.js version.
For example, opening http://targetdomain.com.proxydomain.org/query you may access the real content at http://targetdomain.com/query. You can run the script locally and open http://httpbin.org.127.0.0.1.xip.io:8888/get to test. (Thank 37signals for the great xip.io.)
You can also put the target URL as a parameter of the request, such as http://127.0.0.1.xip.io:8888/?url=http://httpbin.org/get. If the target URL is somewhat complicated (having several query parameters concatenated with
&), to avoid troubles the target URL can be encoded by base64. For example, to access http://httpbin.org/get?a=1&b=2, you can try http://127.0.0.1.xip.io:8888/?url=aHR0cDovL2h0dHBiaW4ub3JnL2dldD9hPTEmYj0y.