PacProxy

A socks proxy server that use PAC file to decide how to forward request。

Features

• Implement a socks server(support socks4 and socks5, no authentication module)
• Using PAC file to decide how to forward request

Install

1. Install node.js
2. Download PacProxy, and uncompress it
3. If you need modify the default configuration, copy config.sample.js to config.js, and modify config.js to set the configuration, such as server bind address or port
4. Run PacProxy.bat(windows only), or command line:

node ProxyServer.js

5. Set the browser's proxy to 127.0.0.1:9999(socks5)

Notes

1. IE/Chrome(without proxy extension) will send socks4 request to socks proxy server, * it is not recommended *, so please install a proxy extension to chrome, such as Foxy Proxy Standard
2. If using firefox, please goto about:config and set 'network.proxy.socks_remote_dns' to 'true'

Issues

• No authentication feature in PacProxy
• Because FindProxyForURL need a url parameter, so we need cheating the socks client to guess the real http url for FindProxyForURL.
• Because the built-in DNS module of nodejs provide only asynchronous call, so any DNS resolve related function(dnsResolve, isInNet, isResolvable) in PAC is faked. The program is maintaining a DNS cache table, DNS resolve function can only get result in the table. If your PAC don't call any DNS resolve related function, you can disable these functions in configuration file.

from https://github.com/liangqing/PacProxy