annotate mod_pubsub_alertmanager/mod_pubsub_alertmanager.lua @ 5173:460f78654864

mod_muc_rtbl: also filter messages This was a bit tricky because we don't want to run the JIDs through SHA256 on each message. Took a while to come up with this simple plan of just caching the SHA256 of the JIDs on the occupants. This will leave some dirt in the occupants after unloading the module, but that should be ok; once they cycle the room, the hashes will be gone. This is direly needed, otherwise, there is a tight race between the moderation activities and the actors joining the room.
author Jonas Schäfer <jonas@wielicki.name>
date Tue, 21 Feb 2023 21:37:27 +0100
parents adda872fa9e1
children 67190744b1eb
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1 local st = require "util.stanza";
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2 local json = require "util.json";
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3 local filters = { --[[ TODO what's useful? ]] };
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4 local render = require "util.interpolation".new("%b{}", tostring, filters);
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5 local uuid_generate = require "util.uuid".generate;
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6
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7 -- TODO alertmanager supports inclusion of HTTP auth and OAuth, worth looking
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8 -- into for using instead of request IP
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9
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10 module:depends("http");
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12 local pubsub_service = module:depends("pubsub").service;
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13
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14 local error_mapping = {
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15 ["forbidden"] = 403;
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16 ["item-not-found"] = 404;
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17 ["internal-server-error"] = 500;
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18 ["conflict"] = 409;
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19 };
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20
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21 local function publish_payload(node, actor, item_id, payload)
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22 local post_item = st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = item_id, })
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23 :add_child(payload);
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24 local ok, err = pubsub_service:publish(node, actor, item_id, post_item);
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25 module:log("debug", ":publish(%q, true, %q, %s) -> %q", node, item_id, payload:top_tag(), err or "");
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26 if not ok then
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27 return error_mapping[err] or 500;
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28 end
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29 return 202;
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30 end
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31
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32 local node_template = module:get_option_string("alertmanager_node_template", "{path?alerts}");
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33
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34 function handle_POST(event, path)
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35 local request = event.request;
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36
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37 local payload = json.decode(event.request.body);
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38 if type(payload) ~= "table" then return 400; end
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39 if payload.version ~= "4" then return 501; end
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40
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41 for _, alert in ipairs(payload.alerts) do
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42 local item = st.stanza("alerts", {xmlns = "urn:uuid:e3bec775-c607-4e9b-9a3f-94de1316d861:v4", status=alert.status});
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43 for k, v in pairs(alert.annotations) do
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44 item:text_tag("annotation", v, { name=k });
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45 end
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46 for k, v in pairs(alert.labels) do
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47 item:text_tag("label", v, { name=k });
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48 end
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49 item:tag("starts", { at = alert.startsAt}):up();
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50 if alert.endsAt and alert.status == "resolved" then
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51 item:tag("ends", { at = alert.endsAt }):up();
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52 end
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53 if alert.generatorURL then
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54 item:tag("link", { href=alert.generatorURL }):up();
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55 end
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56
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57 local node = render(node_template, {alert = alert, path = path, payload = payload, request = request});
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58 local ret = publish_payload(node, request.ip, uuid_generate(), item);
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59 if ret ~= 202 then
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60 return ret
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61 end
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62 end
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63 return 202;
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64 end
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65
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66 local template = module:get_option_string("alertmanager_body_template", [[
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67 *ALARM!*
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68 Status: {status}
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69 Starts at: {startsAt}{endsAt&
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70 Ends at: {endsAt}}
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71 Labels: {labels%
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72 {idx}: {item}}
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73 Annotations: {annotations%
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74 {idx}: {item}}
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75 ]]);
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76
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77 module:hook("pubsub-summary/urn:uuid:e3bec775-c607-4e9b-9a3f-94de1316d861:v4", function(event)
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78 local payload = event.payload;
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79
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80 local data = {
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81 status = payload.attr.status,
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82 firing = "firing" == payload.attr.status,
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83 resolved = "resolved" == payload.attr.status,
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84 annotations = {},
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85 labels = {},
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86 endsAt = payload:find("ends/@at"),
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87 startsAt = payload:find("starts/@at"),
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88 };
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89 for label in payload:childtags("label") do
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90 data.labels[tostring(label.attr.name)] = label:get_text();
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91 end
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92 for annotation in payload:childtags("annotation") do
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93 data.annotations[tostring(annotation.attr.name)] = annotation:get_text();
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94 end
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95
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96 return render(template, data);
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97 end);
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98
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99 module:provides("http", {
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100 route = {
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101 ["POST /*"] = handle_POST;
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102 ["POST"] = handle_POST;
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103 };
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104 });