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