请求复制器em-proxy

翔子

https://github.com/igrigorik/em-proxy

$> gem install em-proxy
$> em-proxy
Usage: em-proxy [options]
  -l, --listen [PORT]              Port to listen on
  -d, --duplex [host:port, ...]    List of backends to duplex data to
  -r, --relay [hostname:port]      Relay endpoint: hostname:port
  -s, --socket [filename]          Relay endpoint: unix filename
  -v, --verbose                    Run in debug mode

$> em-proxy -l 8080 -r localhost:8081 -d localhost:8082,localhost:8083 -v
The above will start em-proxy on port 8080, relay and respond with data from port 8081, and also (optional) duplicate all traffic to ports 8082 and 8083 (and discard their responses).