view mod_muc_restrict_rooms/mod_muc_restrict_rooms.lua @ 3866:c0df50ce96f0

mod_rest: Handle internal http request errors early and then return Skips over attempted parsing of the payload which usually failed since the body is an error string like "connection refused", so this produced useless errors.
author Kim Alvefur <zash@zash.se>
date Sat, 25 Jan 2020 20:22:12 +0100
parents 79adec50b24d
children
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line source

local st = require "util.stanza";
local jid = require "util.jid";
local nodeprep = require "util.encodings".stringprep.nodeprep;

local rooms = module:shared "muc/rooms";
if not rooms then
        module:log("error", "This module only works on MUC components!");
        return;
end

local restrict_patterns = module:get_option("muc_restrict_matching", {});
local restrict_excepts = module:get_option_set("muc_restrict_exceptions", {});
local restrict_allow_admins = module:get_option_boolean("muc_restrict_allow_admins", false);

local function is_restricted(room, who)
	-- If admins can join prohibited rooms, we allow them to
	if restrict_allow_admins and usermanager.is_admin(who, module.host) then
		module:log("debug", "Admins are allowed to enter restricted rooms (%s on %s)", who, room)
		return nil;
	end

	-- Don't evaluate exceptions
	if restrict_excepts:contains(room) then
		module:log("debug", "Room %s is amongst restriction exceptions", room())
		return nil;
	end

	-- Evaluate regexps of restricted patterns
        for pattern,reason in pairs(restrict_patterns) do
                if room:match(pattern) then
			module:log("debug", "Room %s is restricted by pattern %s, user %s is not allowed to join (%s)", room, pattern, who, reason)
                        return reason;
                end
        end

	return nil
end

module:hook("presence/full", function(event)
        local stanza = event.stanza;

        if stanza.name == "presence" and stanza.attr.type == "unavailable" then   -- Leaving events get discarded
                return;
        end

	-- Get the room
	local room = jid.split(stanza.attr.to);
        if not room then return; end

	-- Get who has tried to join it
	local who = jid.bare(stanza.attr.from)

	-- Checking whether room is restricted
	local check_restricted = is_restricted(room, who)
        if check_restricted ~= nil then
                event.allowed = false;
                event.stanza.attr.type = 'error';
	        return event.origin.send(st.error_reply(event.stanza, "cancel", "forbidden", "You're not allowed to enter this room: " .. check_restricted));
        end
end, 10);