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JABBER-QUERYBOT(1p) User Contributed Perl Documentation JABBER-QUERYBOT(1p)

NAME

jabber-querybot - a modular perl jabber bot

DESCRIPTION

jabber-querybot connects a jabber account and wait for messages. If a message comes in, it forward it to your self programmend modul. The return string of your module, jabber-querybot send it back to the jabber sender.

It is designed to be re-usable and to make it easy to write small Jabber bots that do one thing and do it well. A simple concept with a lot of examples and experiences are implemented.

1. Create a jabber account on a jabber-server around

2. Create a bot application:

 cd examples
 cp Querymodule.pm /etc/jabber-querybot/Mybot.pm
 cd /etc/jabber-querybot
 ln -s Mybot.pm Querymodule.pm

Modify login parameters to your jabber-bot-account

vim Mybot.pm

  our $hostname        = "swissjabber.ch";
  our $user            = "";
  our $password        = "";
  our $ident           = "Testbot";
  our $bot_admin       = "\@swissjabber.ch";
  our $port            = "5222";
  our $timeout         = "5";
  our $service_name    = "$user\@$hostname";
  our $bot_description = "Bot help title
  Bot description";

For each jabber message, jabber-querybot will execute sub run_query, that you can write here your application.

You can control how your jabber response will be:

  • error = error message stanza
  • presence = error as presence stanza
  • ignore = ignore message

OPTIONS

jabber-querybot has a lot of variables which you can easy modify for what you need:

querystatus

$querystatus = [ 0 | 1 ]
  • 0 = Bot will not proceed any incoming jabber messages.
  • 1 = Bot will proceed incoming messages.

penalty_status

If the bot has too much workload, it goes to penalty status and wait some time until his status change back to normal.

$timer_reconnect_default = 21600

Every 21600 seconds (6 hours) the bot will shutdown automatically, wait 10 seconds and starting up again.

$timer_auto_query = 0

If you set in your module this variable to 60, the bot will every 60 seconds call the function run_auto_query() which you may use for several things.

System load

If your systems load is >=6, this bot will shutdown the jabber connection and check every 10 seconds systems load. If load <=2, bot will start over.

EXAMPLES

/usr/share/doc/jabber-querybot/examples/Testbot.pm

FILES

/etc/jabber-querybot/Querymodule.pm

/usr/bin/jabber-querybot

RESOURCES

http://github.com/micressor/jabber-querybot/

METHODS

InMessage()

An incoming jabber message to the bot will hook this function.
•
Read parameters of incoming stanza

•
Decode utf8 string

•
increment timer overload and do not process message if bot is overloaded.

•
Ignore message if it is from myself

•
Be sure, that it is not a message from another transport

•
Check any systemcommands for the bot

•
If the bot has sleeping status, change it to work

•
We process only normal text or chat type jabber messages

  • And now we give the real text string which was incoming to the bot via run_query().
  • If run_query() say us 'ignore` we do a log entry and do not answer via jabber to the user.

•
If run_query() says 'error` we send a jabber error stanza wiht the status message from run_query() back to the user.

•
If there was no error, we update the statistic vars and send the answer from run_query() back to the jabber user.

connect_server()

This function connects to the jabber server with the given credentials from Querymodule.pm.

Set the call back functions. This functions will be executed if a message of the types <message/> <iq/> or <presence/> are incoming.

Stop()

Shutdown jabber connection and exit main program

disconnect_server()

Only disconnect from the jabber-server.

reconnect_server()

Reconnect and create a log entry.

InIQ()

We do not proceed any iq (information query), this is only for statisic.

InPresence()

  • Increment timer overload
  • Do not process message if we are overloaded penalty_handler().

We have a problem in Net::Jabber. An incoming message with a ` in resource blocks the bot. We will hotfix that for the moment.

A subscription type `subscribe` is incoming. Send `subscribed` tho the user and say hello ;)

•
Send presence to user

•
Remove subscription if a user remove this bot from his roster

sendPresence()

Send presence information to user

systemcommands()

•
If user type '!help` send a help instruction to the user

•
Send statistic information to the user if he types '!status`

  • Is it a bot command?
  • Is the bot command from the bot admin? If not, send "not allowed"
  • '!shutdown` will shutdown your bot via jabber invoke.
  • '!query off` turn off queries
  • '!query on` turn on queries

get_barejid()

Remove resource id from a jabber id.

calcualte_stats()

Calculate message statistics

jabber_set_presence()

Set new presence if we have another presence status or we have set the force flag (for transport presence).

jabber_send_message()

This function send all jabber messages which are outgoing from the jabber-querybot.

set_wakeup_mode()

Set jabber presence via jabber_set_presence()

penalty_handler()

This function checks if the bot is overloaded with incoming mesages and reject if it is. Two times that's ok so 2:1 because while in main.

Bot admin got everytime an answer.

jabber_add_footer()

Add footer to the processed message.

calcualte_elapsed_time()

Calculate elapsed worktime for a query

sendError()

sendError($message, $from, $to, 404, "text");

system_load_check()

  • Calculate system load
  • If load is too high shutdown bot.
  • If load is ok, starting up bot

connect_bot()

Connect bot and initialize all timers.

check_before_start()

Check configuration variables in Querybotmodule.pm and give answer if anything does not match or is missing.

COPYRIGHT AND LICENSE

Copyright (C) 2009-2012 Marco Balmer <marco@balmer.name>

The Debian packaging is licensed under the GPL, see `/usr/share/common-licenses/GPL-3'.

2012-02-03 perl v5.14.2