#52WeeksOfCode Week 23 – IRC Chat

Week: 23

Language: IRC Chat

IDE(s): Messages + Jabber + BitBee + Chatzilla

History (official):

(From the homepage of #irchelp)

“/I-R-C/ n. [Internet Relay Chat] – IRC provides a way of communicating in real time with people from all over the world. It consists of various separate networks (or “nets”) of IRC servers, machines that allow users to connect to IRC. IRC is very similar to text messaging, but designed around communicating with large groups of users instead of one on one.”

History (real):

Kids, way back in 1988 (ask your parents), the Internet was still mostly called the Arpanet and was not available to average people. Even if you did have access, you had to use your phone to connect to it.

Not your cell phone but a regular old-timey phone. You know, that thing plugged into the wall at your grandparent’s house that they use to  talk with you at Christmas?

Anyway, the Internet For The Rest Of Us(™) consisted of Bulletin Board Systems (BBSs). These were PCs sitting in someone’s basement connected to a phone line. Still dial-up,sure, but you could share files, play games, chat with other users and have lively discussions.

Though BBSs had a chat program, Jarkko Orkarinen, a student at University of Oulu in Finland, decided that he wanted Internet users to be able to connect with BBS users. So while he was upgrading the chat program on his university BBS, he developed IRC (Internet Relay Chat).

IRC is still around, despite having lost a lot of its user base. Its arcane command syntax makes it intimidating for non-technical users, but its flexibility and open standards make it a useful platform for automated messaging. For example, two normally incompatible software programs that have no communication mechanisms in common can easily be set up to exchange data via IRC.

Discussion:

IRC is actually a communications protocol. In other words, a set of language rules. Any programs that speak IRC can talk to each other, regardless of operating system or platform. IRC sends and receives messages in plain text which makes it pretty easy to write code for both servers and clients. That being said, it’s not exactly the Queen’s English:

/join #52weeks

is the command to join a chat room (channel) named 52weeks. On the other hand, pretty much any program that can send or receive text can speak to an IRC server.

I’d like to bring IRC kicking and screaming into the 21st century for my own amusement. In other words, I want to use the default chat application on my MacBook (Messages) to talk to someone on IRC.

The challenge is that Messages doesn’t know how to talk to IRC and vice-versa. However, there is an open messaging protocol called XMPP (eXtensible Messaging and Presence Protocol). Originally named Jabber, the idea was to create a sort of lingua franca for instant messaging.

The first step is to install a Jabber server. The easiest way to do this is with Openfire. It’s easy to setup, open source and cross-platform. I got the server running, setup an account for myself, pointed Messages to the server and I was up and chatting.

Connecting to Jabber from Messages

Connecting to Jabber from Messages

Okay, there was nobody to talk to but the point is, I was at least able to talk to myself.

Now to set up a gateway to connect my Jabber server to my IRC server. I’ve already set up an IRC server using ngircd (installed from MacPorts). I can verify the server is working by connecting to it with Chatzilla, a Mozilla Firefox addon that lets me easily connect to an IRC server using the URL irc://<server_name> in the location bar.

It’s important to use the same username on the IRC end as on Jabber. A gateway’s good but it can’t read your mind.

Now for the protocol gateway to connect Jabber with IRC. I chose BitBee, a Linux/UNIX  IRC server that knows how to connect to other instant messaging services. I installed BiBee using MacPorts, stopped the ngircd server (I didn’t need it anymore) and started BitBee.

Chatzilla connection to BitBee

Chatzilla connection to BitBee

The key to managing BitBee is the &bitlbee channel. This is where you add the accounts for your other chat services. I set up a Jabber account called tsinclair_irc with the password ‘password’ and added the account to BitBee:

account add jabber tsinclair_irc@macpro15.local password

Now to test the connection. First I sent a message from Jabber to IRC:

Connecting to IRC from Messages through Jabber

Connecting to IRC from Messages through Jabber

Now to see if the message came through on Chatzilla:

Message to Jabber from IRC

Message to Jabber from IRC

I sent “Hello yourself!” back:

Message from Jabber to IRC

Message from Jabber to IRC

Let’s look at the setup from 100,000 feet:

Overview of my messaging setup

Overview of my messaging setup

All along the way, I went for the easy option where available though parts of it were harder than they needed to be.

 

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