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annotate mod_cloud_notify_filters/mod_cloud_notify_filters.lua @ 4537:53ee391ca689

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mod_smacks: Fix traceback due to session being destroyed in send() Sending something can cause the OS to notice that the connection is dead and then the connection can be dead at this point. More likely if opportunistic_writes is enabled.
author Kim Alvefur <zash@zash.se>
date Thu, 01 Apr 2021 11:35:26 +0200
parents 6872e55cfb92
children ba94a5301985
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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 muted_jids[jid.prep(item.attr.jid)] = true;
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32 end
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33 event.push_info.muted_jids = muted_jids;
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34 end
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35
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36 local filter_groupchat = enable:get_child("groupchat", xmlns_push_filter_groupchat);
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37 if filter_groupchat then
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38 local groupchat_rules = {};
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39 for item in filter_groupchat:childtags("room") do
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40 groupchat_rules[jid.prep(item.attr.jid)] = {
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41 when = item.attr.allow;
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42 nick = item.attr.nick;
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43 };
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44 end
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45 event.push_info.groupchat_rules = groupchat_rules;
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46 end
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47 end
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48
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49 function handle_push(event)
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50 local push_info = event.push_info;
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51 local stanza = event.original_stanza;
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52 local user_name, user_host = jid.split(stanza.attr.to);
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53 local sender_jid = jid.bare(stanza.attr.from);
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54
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55 if push_info.filter_unknown then
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56 if user_host == module.host and not is_contact_subscribed(user_name, user_host, sender_jid) then
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57 event.reason = "Filtering: unknown sender";
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58 return true;
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59 end
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60 end
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61
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62 if push_info.muted_jids then
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63 if push_info.muted_jids[sender_jid] then
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64 event.reason = "Filtering: muted";
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65 return true;
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66 end
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67 end
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68
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69 if stanza.attr.type == "groupchat" and push_info.groupchat_rules then
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70 local rule = push_info.groupchat_rules[sender_jid];
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71 if rule then
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72 if rule.when == "never" then
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73 event.reason = "Filtering: muted group chat";
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74 return true;
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75 elseif rule.when == "mentioned" then
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76 local mentioned = false;
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77 local our_uri = "xmpp:"..jid.bare(stanza.attr.to);
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78 local our_muc_uri = rule.nick and "xmpp:"..sender_jid.."/"..rule.nick;
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79 for reference in stanza:childtags("reference", xmlns_references) do
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80 if reference.attr.type == "mention" then
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81 local mention_uri = reference.attr.uri;
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82 if mention_uri == our_uri or mention_uri == our_muc_uri then
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83 mentioned = true;
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84 break;
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85 end
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86 end
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87 end
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88 if not mentioned then
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89 event.reason = "Filtering: not mentioned";
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90 return true;
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91 end
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92 end
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93 end
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94 end
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95 end
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96
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97 module:hook("cloud_notify/registration", handle_register);
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98 module:hook("cloud_notify/push", handle_push);
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99