Lua SOCKS5 client for the ngx_lua based on the cosocket API

Related project: onion2web.

Paper (in Russian).

$ sudo luarocks install socks5

This module contains the following functions:

• socks5.auth(cosocket) - authenticate to SOCKS5 server (method "no authentication" is used). Cosocket must be connected to SOCKS5 server

• socks5.connect(cosocket, host, port) - tell SOCKS5 server to connect to target host:port. Host must be domain name

• socks5.handle_request(socks5host, socks5port, request_changer?, response_changer?, change_only_html?) - creates cosocket, authenticates to SOCKS5 server (defined by socks5host, socks5port), connects to target host:port (defined in ngx.req), receive request headers and body, send them through SOCKS5 server to target, then receive response headers and body, send them to client.

  Optional function request_changer is applied to request before sending it to target. Optional function response_changer is applied to response before sending it to client.

  The proxy can operate in two modes:

  • whole-page: read whole HTTP response and then send it to the client;
  • streaming: read response in small chunks.

  If response_changer is not used, streaming mode is used. If response_changer is used and change_only_html is truthy, then whole-page is used for HTML pages and streaming is used otherwise.

How to use this module to proxy all requests through Tor:

server {
    listen 80;
    server_name ip4.me; # must be in request header
    location / {
        default_type text/html;
        content_by_lua '
        require("socks5").handle_request("127.0.0.1", 9050)
        ';
    }
}