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annotate mod_cloud_notify_filters/mod_cloud_notify_filters.lua @ 5302:ba94a5301985

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mod_cloud_notify_filters: Fix traceback when invalid JIDs are submitted
author Matthew Wild <mwild1@gmail.com>
date Tue, 04 Apr 2023 18:09:48 +0100
parents 6872e55cfb92
children
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1 local jid = require "util.jid";
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2
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3 local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
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4
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5 local xmlns_push = "urn:xmpp:push:0";
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6 local xmlns_push_filter_unknown = "tigase:push:filter:ignore-unknown:0";
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7 local xmlns_push_filter_muted = "tigase:push:filter:muted:0";
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8 local xmlns_push_filter_groupchat = "tigase:push:filter:groupchat:0";
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9 local xmlns_references = "urn:xmpp:reference:0";
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10
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11 -- https://xeps.tigase.net//docs/push-notifications/encrypt/#41-discovering-support
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12 local function account_disco_info(event)
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13 event.reply:tag("feature", {var=xmlns_push_filter_unknown}):up();
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14 event.reply:tag("feature", {var=xmlns_push_filter_muted}):up();
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15 event.reply:tag("feature", {var=xmlns_push_filter_groupchat}):up();
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16 end
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17 module:hook("account-disco-info", account_disco_info);
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18
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19 function handle_register(event)
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20 local enable = event.stanza:get_child("enable", xmlns_push);
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21
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22 local filter_unknown = enable:get_child("ignore-unknown", xmlns_push_filter_unknown);
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23 if filter_unknown then
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24 event.push_info.filter_unknown = true;
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25 end
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26
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27 local filter_muted = enable:get_child("muted", xmlns_push_filter_muted);
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28 if filter_muted then
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29 local muted_jids = {};
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30 for item in filter_muted:childtags("item") do
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31 local room_jid = jid.prep(item.attr.jid);
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32 if not room_jid then
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33 module:log("warn", "Skipping invalid JID: <%s>", room_jid);
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34 else
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35 muted_jids[room_jid] = true;
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36 end
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37 end
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38 event.push_info.muted_jids = muted_jids;
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39 end
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40
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41 local filter_groupchat = enable:get_child("groupchat", xmlns_push_filter_groupchat);
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42 if filter_groupchat then
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43 local groupchat_rules = {};
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44 for item in filter_groupchat:childtags("room") do
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45 local room_jid = jid.prep(item.attr.jid);
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46 if not room_jid then
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47 module:log("warn", "Skipping invalid JID: <%s>", item.attr.jid);
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48 else
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49 groupchat_rules[room_jid] = {
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50 when = item.attr.allow;
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51 nick = item.attr.nick;
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52 };
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53 end
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54 end
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55 event.push_info.groupchat_rules = groupchat_rules;
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56 end
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57 end
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58
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59 function handle_push(event)
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60 local push_info = event.push_info;
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61 local stanza = event.original_stanza;
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62 local user_name, user_host = jid.split(stanza.attr.to);
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63 local sender_jid = jid.bare(stanza.attr.from);
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64
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65 if push_info.filter_unknown then
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66 if user_host == module.host and not is_contact_subscribed(user_name, user_host, sender_jid) then
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67 event.reason = "Filtering: unknown sender";
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68 return true;
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69 end
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70 end
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71
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72 if push_info.muted_jids then
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73 if push_info.muted_jids[sender_jid] then
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74 event.reason = "Filtering: muted";
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75 return true;
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76 end
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77 end
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78
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79 if stanza.attr.type == "groupchat" and push_info.groupchat_rules then
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80 local rule = push_info.groupchat_rules[sender_jid];
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81 if rule then
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82 if rule.when == "never" then
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83 event.reason = "Filtering: muted group chat";
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84 return true;
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85 elseif rule.when == "mentioned" then
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86 local mentioned = false;
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87 local our_uri = "xmpp:"..jid.bare(stanza.attr.to);
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88 local our_muc_uri = rule.nick and "xmpp:"..sender_jid.."/"..rule.nick;
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89 for reference in stanza:childtags("reference", xmlns_references) do
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90 if reference.attr.type == "mention" then
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91 local mention_uri = reference.attr.uri;
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92 if mention_uri == our_uri or mention_uri == our_muc_uri then
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93 mentioned = true;
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94 break;
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95 end
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96 end
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97 end
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98 if not mentioned then
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99 event.reason = "Filtering: not mentioned";
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100 return true;
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101 end
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102 end
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103 end
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104 end
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105 end
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106
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107 module:hook("cloud_notify/registration", handle_register);
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108 module:hook("cloud_notify/push", handle_push);
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109