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I started using IRC at a young age, and I have always been fascinated with it. As a language exercise, I was thinking about programming a simple IRC client in Ruby with Shoes as a graphical front-end. My question to you, kind-sirs, what do I need to become familiar with to start on this great adventure (besides shoes and Ruby of course)? I imagine there is some-sort of specification on IRC Protocol. Any pointers?

+10  A: 

The IRC Specification is laid out in RFC 1459

http://www.irchelp.org/irchelp/rfc/rfc.html

FlySwat
+5  A: 

I found this gem on Wikipedia. Sounds intimidating.

It's actually not.

Telnet onto an IRC Server and witness the simplicity of the protocol first hand. The hardest part is the handshake, after that its very simple.

FlySwat
+1 Telnet and try it manually first!
Ates Goral
+1 - I have chatted on IRC via telnet (only for the geek points)
Blorgbeard
+2  A: 

I once implemented a client and a server with 2 more guys (as part of a course).
I can tell you that the RFC you were already linked to is great.
I'd also try simply sniffing a connection with an existing client to see for yourself how stuff work.

abyx
A: 

Not exactly an answer to your question, but it may be helpful. If you are using Ruby, I have found the Autumn Leaves project to be a great way to build an IRC bot using Ruby:

http://github.com/RISCfuture/autumn/tree/master

It is pretty much the Jibble of the Ruby world.

hernan43
+10  A: 

An earlier post mentioned RFC1459. While it is a very good introduction to IRC, it has actually been superseded by RFCs 2810-2813. Here is a more complete list of documentation you need to program anything IRC-related:

Hinrik