prosody-modules
f71d66bd87be
mod_muc_limits/mod_muc_limits.lua

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mod_muc_limits/mod_muc_limits.lua @ 5566:f71d66bd87be

mod_muc_limits: Add a limit on number of lines per message More vertical space -> more cost
author Kim Alvefur <zash@zash.se>
date Sat, 24 Jun 2023 23:56:13 +0200
parent 5564:731ba9400c10
child 5567:d52cc18f0aa8
comparison
equal deleted inserted replaced
5565:b97ae1cd7813 5566:f71d66bd87be
11 11
12 local period = math.max(module:get_option_number("muc_event_rate", 0.5), 0); 12 local period = math.max(module:get_option_number("muc_event_rate", 0.5), 0);
13 local burst = math.max(module:get_option_number("muc_burst_factor", 6), 1); 13 local burst = math.max(module:get_option_number("muc_burst_factor", 6), 1);
14 14
15 local max_nick_length = module:get_option_number("muc_max_nick_length", 23); -- Default chosen through scientific methods 15 local max_nick_length = module:get_option_number("muc_max_nick_length", 23); -- Default chosen through scientific methods
16 local max_line_count = module:get_option_number("muc_max_line_count", 23); -- Default chosen through s/scientific methods/copy and paste/
17
16 local join_only = module:get_option_boolean("muc_limit_joins_only", false); 18 local join_only = module:get_option_boolean("muc_limit_joins_only", false);
17 local dropped_count = 0; 19 local dropped_count = 0;
18 local dropped_jids; 20 local dropped_jids;
19 21
20 local function log_dropped() 22 local function log_dropped()
50 local body = stanza:get_child_text("body"); 52 local body = stanza:get_child_text("body");
51 if body then 53 if body then
52 -- TODO calculate a text diagonal cross-section or some mathemagical 54 -- TODO calculate a text diagonal cross-section or some mathemagical
53 -- number, maybe some cost multipliers 55 -- number, maybe some cost multipliers
54 local body_lines = select(2, body:gsub("\n[^\n]*", "")); 56 local body_lines = select(2, body:gsub("\n[^\n]*", ""));
57 if body_lines > max_line_count then
58 origin.send(st.error_reply(stanza, "modify", "policy-violation", "Your message is too long, please write a shorter one"):up()
59 :tag("x", { xmlns = xmlns_muc; }));
60 return true;
61 end
55 cost = cost + body_lines; 62 cost = cost + body_lines;
56 end 63 end
57 if not throttle:poll(cost) then 64 if not throttle:poll(cost) then
58 module:log("debug", "Dropping stanza for %s@%s from %s, over rate limit", dest_room, dest_host, from_jid); 65 module:log("debug", "Dropping stanza for %s@%s from %s, over rate limit", dest_room, dest_host, from_jid);
59 if not dropped_jids then 66 if not dropped_jids then