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annotate mod_isolate_host/mod_isolate_host.lua @ 4942:e7b9bc629ecc

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mod_rest: Add special handling to catch MAM results from remote hosts Makes MAM queries to remote hosts works. As the comment says, MAM results from users' local archives or local MUCs are returned via origin.send() which is provided in the event and thus already worked. Results from remote hosts go via normal stanza routing and events, which need this extra handling to catch. This pattern of iq-set, message+, iq-result is generally limited to MAM. Closest similar thing might be MUC join, but to really handle that you would need the webhook callback mechanism.
author Kim Alvefur <zash@zash.se>
date Mon, 16 May 2022 19:47:09 +0200
parents 8e19b943c2cd
children bc75fc9400ae
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1011
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1 local jid = require "util.jid";
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2 local jid_bare, jid_split = jid.bare, jid.split;
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3 local is_admin = require "core.usermanager".is_admin;
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4 local set = require "util.set";
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5 local st = require "util.stanza";
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6
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7 local stanza_types = set.new{"message", "presence", "iq"};
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8 local jid_types = set.new{"bare", "full", "host"};
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9
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10 local except_domains = module:get_option_inherited_set("isolate_except_domains", {});
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11 local except_users = module:get_option_inherited_set("isolate_except_users", {});
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12
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13 function check_stanza(event)
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14 local origin, stanza = event.origin, event.stanza;
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15 if origin.no_host_isolation then return; end
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16 local to_user, to_host = jid_split(event.stanza.attr.to);
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17 if to_host and to_host ~= origin.host and not except_domains:contains(to_host) then
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18 if to_host:match("^[^.]+%.(.+)$") == origin.host then -- Permit subdomains
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19 except_domains:add(to_host);
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20 return;
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21 end
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22 module:log("warn", "Forbidding stanza from %s to %s", stanza.attr.from or origin.full_jid, stanza.attr.to);
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23 origin.send(st.error_reply(stanza, "auth", "forbidden", "Communication with "..to_host.." is not available"));
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24 return true;
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25 end
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26 end
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27
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28 for stanza_type in stanza_types do
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29 for jid_type in jid_types do
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30 module:hook("pre-"..stanza_type.."/"..jid_type, check_stanza, 1);
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31 end
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32 end
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33
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34 function check_user_isolated(event)
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35 local session = event.session;
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36 local bare_jid = jid_bare(session.full_jid);
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37 if is_admin(bare_jid, module.host) or except_users:contains(bare_jid) then
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38 session.no_host_isolation = true;
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39 end
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40 module:log("debug", "%s is %sisolated", session.full_jid or "[?]", session.no_host_isolation and "" or "not ");
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41 end
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42
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43 module:hook("resource-bind", check_user_isolated);