prosody-modules
d52cc18f0aa8
mod_muc_limits/mod_muc_limits.lua

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mod_muc_limits/mod_muc_limits.lua @ 5567:d52cc18f0aa8

mod_muc_limits: Add a limit on number of bytes in a message body
author Kim Alvefur <zash@zash.se>
date Sun, 25 Jun 2023 00:00:02 +0200
parent 5566:f71d66bd87be
child 5608:6680a1f53353
comparison
equal deleted inserted replaced
5566:f71d66bd87be 5567:d52cc18f0aa8
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/ 16 local max_line_count = module:get_option_number("muc_max_line_count", 23); -- Default chosen through s/scientific methods/copy and paste/
17 local max_char_count = module:get_option_number("muc_max_char_count", 5664); -- Default chosen by multiplying a number by 23
17 18
18 local join_only = module:get_option_boolean("muc_limit_joins_only", false); 19 local join_only = module:get_option_boolean("muc_limit_joins_only", false);
19 local dropped_count = 0; 20 local dropped_count = 0;
20 local dropped_jids; 21 local dropped_jids;
21 22
51 local cost = 1; 52 local cost = 1;
52 local body = stanza:get_child_text("body"); 53 local body = stanza:get_child_text("body");
53 if body then 54 if body then
54 -- TODO calculate a text diagonal cross-section or some mathemagical 55 -- TODO calculate a text diagonal cross-section or some mathemagical
55 -- number, maybe some cost multipliers 56 -- number, maybe some cost multipliers
57 if #body > max_char_count then
58 origin.send(st.error_reply(stanza, "modify", "policy-violation", "Your message is too long, please write a shorter one")
59 :up():tag("x", { xmlns = xmlns_muc }));
60 return true;
61 end
56 local body_lines = select(2, body:gsub("\n[^\n]*", "")); 62 local body_lines = select(2, body:gsub("\n[^\n]*", ""));
57 if body_lines > max_line_count then 63 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() 64 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; })); 65 :tag("x", { xmlns = xmlns_muc; }));
60 return true; 66 return true;