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annotate mod_block_s2s_subscriptions/mod_block_s2s_subscriptions.lua @ 4362:116c88c28532

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mod_http_admin_api: restructure group-related info in API - Return the members of the group right in the get_group_by_id call. This is an O(1) of extra work. - Remove the groups attribute from get_user_by_name as that is O(n) of work and rarely immediately needed. The replacement for the group membership information in the user is for now to use the group API and iterate; future work may fix that.
author Jonas Schäfer <jonas@wielicki.name>
date Wed, 20 Jan 2021 15:30:29 +0100
parents 70ff25db37fa
children
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70ff25db37fa mod_block_s2s_subscriptions: New module to block incoming presence subscriptions from non-contacts on selected remote hosts
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2 local jid_split = require "util.jid".split;
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3 local jid_bare = require "util.jid".bare;
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4 local load_roster = require "core.rostermanager".load_roster;
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6 local blocked_servers = module:get_option_set("block_s2s_subscriptions")._items;
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8 function filter_presence(event)
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9 if blocked_servers[event.origin.from_host] and event.stanza.attr.type == "subscribe" then
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10 local stanza = event.stanza;
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11 local to_user, to_host = jid_split(stanza.attr.to);
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12 local roster = load_roster(to_user, to_host);
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13 if roster and roster[jid_bare(stanza.attr.from)] then
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14 return; -- In roster, pass through
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15 end
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16 return true; -- Drop
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17 end
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18 end
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20 module:hook("presence/bare", filter_presence, 200); -- Client receiving