I'm working on modernizing Rosetta Code's infrastructure. Starting with communications. Please accept this time-limited open invite to RC's Slack.. --Michael Mol (talk) 20:59, 30 May 2020 (UTC)

IRC gateway

From Rosetta Code
IRC gateway is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.
Create an IRC Gateway capable of connecting an IRC server with another IRC server or Chat server


Library: go-ircevent

Just a bare-bones gateway.

package main
import (
func main() {
if len(os.Args) != 9 {
fmt.Println("To use this gateway, you need to pass 8 command line arguments, namely:")
fmt.Println(" <server1> <channel1> <nick1> <user1> <server2> <channel2> <nick2> <user2>")
server1, channel1, nick1, user1 := os.Args[1], os.Args[2], os.Args[3], os.Args[4]
server2, channel2, nick2, user2 := os.Args[5], os.Args[6], os.Args[7], os.Args[8]
irc1 := irc.IRC(nick1, user1)
irc1.VerboseCallbackHandler = true
irc1.Debug = false
irc1.UseTLS = true
irc1.TLSConfig = &tls.Config{InsecureSkipVerify: true}
irc2 := irc.IRC(nick2, user2)
irc2.VerboseCallbackHandler = true
irc2.Debug = false
irc2.UseTLS = true
irc2.TLSConfig = &tls.Config{InsecureSkipVerify: true}
irc1.AddCallback("001", func(e *irc.Event) {
msg := fmt.Sprintf("<gateway> Hello %s. Please send your first message to %s.", nick1, nick2)
irc1.Privmsg(nick1, msg)
irc1.AddCallback("366", func(e *irc.Event) {})
irc1.AddCallback("PRIVMSG", func(e *irc.Event) {
msg := fmt.Sprintf("<%s> %s", nick1, e.Message)
irc2.Privmsg(nick2, msg)
irc2.AddCallback("001", func(e *irc.Event) {
msg := fmt.Sprintf("<gateway> Hello %s. Please wait for your first message from %s.", nick2, nick1)
irc2.Privmsg(nick2, msg)
irc2.AddCallback("366", func(e *irc.Event) {})
irc2.AddCallback("PRIVMSG", func(e *irc.Event) {
msg := fmt.Sprintf("<%s> %s", nick2, e.Message)
irc1.Privmsg(nick1, msg)
err1 := irc1.Connect(server1)
if err1 != nil {
err2 := irc2.Connect(server2)
if err2 != nil {
go irc2.Loop()


This code is called as a complete script, perhaps like this:

./ircgateway.tcl irc://hostA.org/fishing bait irc://hostB.com:6667/haxors botfly
Library: Tcllib (Package: picoirc)
#!/bin/env tclsh8.5
package require picoirc
### Parse script arguments
# URL form: irc://foobar.org/secret
if {$argc != 4} {
puts stderr "wrong # args: should be \"$argv0 ircA nickA ircB nickB\""
exit 1
lassign $argv url1 nick1 url2 nick2
### How to do the forwarding from one side to the other
proc handle {from to -> state args} {
upvar #0 conn($from) f conn($to) t chan($to) chan
switch -exact -- $state {
"chat" {
lassign $args target nick message type
if {![string match "*>>*<<*" $message]} {
picoirc::post $t $chan ">>$nick said<< $message"
"traffic" {
lassign $args action channel nick newnick
switch -exact -- $action {
"entered" - "left" {
picoirc::post $t $chan ">>$nick has $action<<"
"close" {
### Connect and run the event loop
set chan(1) [lindex [picoirc::splituri $url1] 2]
set chan(2) [lindex [picoirc::splituri $url1] 2]
interp alias {} handle1to2 {} handle 1 2
interp alias {} handle2to1 {} handle 2 1
set conn(1) [picoirc::connect handle1to2 $nick1 $url1]
set conn(2) [picoirc::connect handle2to1 $nick2 $url2]
vwait forever