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annotate mod_component_http/mod_component_http.lua @ 5612:2e30af180da5

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mod_muc_moderation: Stamp XEP-0421 occupant-id for the acting moderator Gives clients some hint about which moderator it was who did the deed. The @by attribute does have the nick of the actor, but they could change their nickname at some point, which is what occupant-id solves. Ref #1816
author Kim Alvefur <zash@zash.se>
date Thu, 20 Jul 2023 10:38:33 +0200
parents 032589c801d7
children
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1 local http = require "net.http";
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2 local json = require "util.json";
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3 local st = require "util.stanza";
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4 local xml = require "util.xml";
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5 local unpack = rawget(_G, "unpack") or table.unpack;
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6
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7 local url = module:get_option_string("component_post_url");
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8 assert(url, "Missing required config option 'component_post_url'");
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9
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10 local stanza_kinds = module:get_option_set("post_stanza_types", { "message" });
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11
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12 local http_error_map = {
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13 [0] = { "cancel", "remote-server-timeout", "Connection failure" };
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14 -- 4xx
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15 [400] = { "modify", "bad-request" };
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16 [401] = { "auth", "not-authorized" };
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17 [402] = { "auth", "forbidden", "Payment required" };
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18 [403] = { "auth", "forbidden" };
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19 [404] = { "cancel", "item-not-found" };
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20 [410] = { "cancel", "gone" };
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21 -- 5xx
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22 [500] = { "cancel", "internal-server-error" };
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23 [501] = { "cancel", "feature-not-implemented" };
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24 [502] = { "cancel", "remote-server-timeout", "Bad gateway" };
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25 [503] = { "wait", "remote-server-timeout", "Service temporarily unavailable" };
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26 [504] = { "wait", "remote-server-timeout", "Gateway timeout" };
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27 }
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28
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29 local function error_reply(stanza, code)
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30 local error = http_error_map[code] or { "cancel", "service-unavailable" };
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31 return st.error_reply(stanza, unpack(error, 1, 3));
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32 end
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33
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34 function handle_stanza(event)
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35 local stanza = event.stanza;
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36 local request_body = json.encode({
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37 to = stanza.attr.to;
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38 from = stanza.attr.from;
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39 kind = stanza.name;
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40 body = stanza.name == "message" and stanza:get_child_text("body") or nil;
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41 stanza = tostring(stanza);
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42 });
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43 http.request(url, {
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44 body = request_body;
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45 }, function (response_text, code, response)
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46 if stanza.attr.type == "error" then return; end -- Avoid error loops, don't reply to error stanzas
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47 if code == 200 and response_text and response.headers["content-type"] == "application/json" then
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48 local response_data = json.decode(response_text);
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49 if response_data.stanza then
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50 local reply_stanza = xml.parse(response_data.stanza);
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51 if reply_stanza then
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52 reply_stanza.attr.from, reply_stanza.attr.to = stanza.attr.to, stanza.attr.from;
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53 module:send(reply_stanza);
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54 else
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55 module:log("warn", "Unable to parse reply stanza");
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56 end
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57 else
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58 local stanza_kind = response_data.kind or "message";
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59 local to = response_data.to or stanza.attr.from;
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60 local from = response_data.from or stanza.attr.to;
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61 local reply_stanza = st.stanza(stanza_kind, {
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62 to = to, from = from;
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63 type = response_data.type or (stanza_kind == "message" and "chat") or nil;
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64 });
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65 if stanza_kind == "message" and response_data.body then
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66 reply_stanza:tag("body"):text(tostring(response_data.body)):up();
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67 end
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68 module:log("debug", "Sending %s", tostring(reply_stanza));
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69 module:send(reply_stanza);
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70 end
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71 elseif code >= 200 and code <= 299 then
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72 return;
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73 else
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74 module:send(error_reply(stanza, code));
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75 end
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76 return true;
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77 end);
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78 return true;
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79 end
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80
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81 for stanza_kind in stanza_kinds do
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82 for _, jid_type in ipairs({ "host", "bare", "full" }) do
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83 module:hook(stanza_kind.."/"..jid_type, handle_stanza);
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84 end
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85 end
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86
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87 -- Simple handler for an always-online JID that allows everyone to subscribe to presence
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88 local function default_presence_handler(event)
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89 local stanza = event.stanza;
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90 module:log("debug", "Handling %s", tostring(stanza));
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91 if stanza.attr.type == "probe" then
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92 module:send(st.presence({ to = stanza.attr.from, from = stanza.attr.to.."/default" }));
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93 elseif stanza.attr.type == "subscribe" then
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94 module:send(st.presence({ type = "subscribed", to = stanza.attr.from, from = stanza.attr.to.."/default" }));
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95 module:send(st.presence({ to = stanza.attr.from, from = stanza.attr.to.."/default" }));
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96 elseif stanza.attr.type == "unsubscribe" then
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97 module:send(st.presence({ type = "unavailable", to = stanza.attr.from, from = stanza.attr.to.."/default" }));
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98 end
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99 return true;
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100 end
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101
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102 module:hook("presence/bare", default_presence_handler, -1);