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# mod_pottymouth
The 'mod_pottymouth' ejabberd module aims to fill the void left by 'mod_shit'
which has disappeared from the net. It allows individual whole words of a
message to be filtered against a blacklist. It allows multiple blacklists
sharded by language. The internal bloomfilter can support arbitrary blacklist
sizes. Using a large list (say, 87M terms) will slow down the initial server
boot time (to about 15 minutes respectively), but once loaded lookups are very
speedy.
#### Installation
On Ubuntu:
````
cd ~/.ejabberd-modules/sources
clone the git repo
cd mod_pottymouth
ejabberdctl module_install mod_pottymouth
ejabberdctl restart
````
module will be installed in: ~/.ejabberd-modules/mod_pottymouth
#### Config
The file format is as follows:
````
modules:
mod_pottymouth:
blacklists:
default: /home/your_user/blacklist_en.txt
en: /home/your_user/blacklist_en.txt
cn: /home/your_user/blacklist_cn.txt
fr: /home/your_user/blacklist_fr.txt
````
For each language (en,cn,fr,...whatever) provide a full path to a backlist file.
The blacklist file is a plain text file with blacklisted words listed one per
line.
#### Gotchas
The language will be looked up by whatever value is passed in the xml:lang
attribute of the xml message. So, any xml:lang value to be supported will need
a corresponding entry/blacklist in the config file. If xml:lang is missing,
the 'default' entry in config will be used.
For xml:lang attribute docs, see:
[http://wiki.xmpp.org/web/Programming_XMPP_Clients#Sending_a_message](http://wiki.xmpp.org/web/Programming_XMPP_Clients#Sending_a_message)
#### Blacklist helper
Thinking of a bunch of swear words and all the permutations can be tough. We made
a helper script to take a bare wordlist and generate permutations given a
dictionary of substitution characters:
[https://github.com/madglory/permute_wordlist](https://github.com/madglory/permute_wordlist)
#### Tip of the hat
This mod makes use of the excellent 'etbloom' module:
[https://github.com/erlangtoolbox/etbloom](https://github.com/erlangtoolbox/etbloom)