[hepek]

isn't this reimplementing netcat -e command?

http://linux.die.net/man/1/ncat

[Sanddancer]

Seems more like an inetd to me. Give a command and run it again and again.

[joewalnes]

It's similar to netcat -e and inetd, except it also handles the WebSocket protocol (negotiating the handshake and message framing), so your apps don't need to.

[sgt]

If you're on Ubuntu (and maybe other distros as well), be sure to install the nc-traditional package. Otherwise you don't get the nifty features such as -e

[bct]

Basically, but it also handles some details specific to the websockets protocol.