prosody-modules
08138de4cb88
mod_muc_http_auth/mod_muc_http_auth.lua

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mod_muc_http_auth/mod_muc_http_auth.lua @ 4296:08138de4cb88

Prosodoy module to externalize MUC authorization via HTTP
author Seve Ferrer <seve@delape.net>
date Sat, 12 Dec 2020 18:19:14 +0100
child 4299:8006da2cf44c
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equal deleted inserted replaced
4295:d44a8d3dd571 4296:08138de4cb88
1 local wait_for = require "util.async".wait_for;
2 local http = require "net.http";
3 local json = require "util.json";
4 local st = require "util.stanza";
5 local jid_node = require "util.jid".node;
6 local jid_bare = require "util.jid".bare;
7
8 local authorization_url = module:get_option("muc_http_auth_url", "")
9 local enabled_for = module:get_option_set("muc_http_auth_enabled_for", nil)
10 local disabled_for = module:get_option_set("muc_http_auth_disabled_for", nil)
11 local insecure = module:get_option("muc_http_auth_insecure", false) --For development purposes
12
13 local function must_be_authorized(room_node)
14 -- If none of these is set, all rooms need authorization
15 if not enabled_for and not disabled_for then return true; end
16
17 if enabled_for and not disabled_for then
18 for _, _room_node in ipairs(enabled_for) do
19 if _room_node == room_node then
20 return true;
21 end
22 end
23 end
24
25 if disabled_for and not enabled_for then
26 for _, _room_node in ipairs(disabled_for) do
27 if _room_node == room_node then
28 return false;
29 end
30 end
31 end
32
33 return true;
34 end
35
36 local function handle_success(response)
37 local body = json.decode(response.body or "") or {}
38 response = {
39 err = body.error,
40 allowed = body.allowed,
41 code = response.code
42 }
43 return {response=response, err=response.err};
44 end
45
46 local function handle_error(err)
47 return {err=err};
48 end
49
50 local function handle_presence(event)
51 local stanza = event.stanza;
52 if stanza.name ~= "presence" or stanza.attr.type == "unavailable" then
53 return;
54 end
55
56 local room, origin = event.room, event.origin;
57 if (not room) or (not origin) then return; end
58
59 if not must_be_authorized(jid_node(room.jid)) then return; end
60
61 local user_bare_jid = jid_bare(stanza.attr.from);
62 local url = authorization_url .. "?userJID=" .. user_bare_jid .."&mucJID=" .. room.jid;
63
64 local result = wait_for(http.request(url, {method="GET", insecure=insecure}):next(handle_success, handle_error));
65 local response, err = result.response, result.err;
66
67 if not (response and response.allowed) then
68 -- User is not authorized to join this room
69 err = (response or {}).err or err
70 module:log("debug", user_bare_jid .. " is not authorized to join " .. room.jid .. " Error: " .. tostring(err));
71 origin.send(st.error_reply(stanza, "error", "not-authorized", nil, module.host));
72 return true;
73 end
74
75 module:log("debug", user_bare_jid .. " is authorized to join " .. room.jid);
76 return;
77 end
78
79
80 module:hook("muc-occupant-pre-join", handle_presence);