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annotate mod_block_registrations/mod_block_registrations.lua @ 1179:27b4e01ddbc4

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mod_s2s_blacklist: A new _simple_ s2s blacklist module
author Matthew Wild <mwild1@gmail.com>
date Tue, 03 Sep 2013 10:45:54 +0100
parents cabbcc1997d9
children dbaa67babeb4
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cabbcc1997d9 mod_block_registrations: Allow restricting registrations of certain user accounts, and/or ensure that registered accounts conform to a given pattern
Matthew Wild <mwild1@gmail.com>
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1 local st = require "util.stanza";
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2 local nodeprep = require "util.encodings".stringprep.nodeprep;
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3
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4 local block_users = module:get_option_set("block_registrations_users", { "admin" });
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5 local block_patterns = module:get_option_set("block_registrations_matching", {});
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6 local require_pattern = module:get_option_string("block_registrations_require");
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7
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8 function is_blocked(username)
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9 -- Check if the username is simply blocked
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10 if block_users:contains(username) then return true; end
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11
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12 for pattern in block_patterns do
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13 if username:match(pattern) then
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14 return true;
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15 end
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16 end
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17 -- Not blocked, but check that username matches allowed pattern
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18 if require_pattern and not username:match(require_pattern) then
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19 return true;
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20 end
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21 end
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23 module:hook("stanza/iq/jabber:iq:register:query", function(event)
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24 local session, stanza = event.origin, event.stanza;
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25
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26 if stanza.attr.type == "set" then
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27 local query = stanza.tags[1];
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28 local username = nodeprep(query:get_child_text("username"));
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29 if username and is_blocked(username) then
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30 session.send(st.error_reply(stanza, "modify", "policy-violation", "Username is blocked"));
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31 return true;
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32 end
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33 end
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34 end, 10);