Mercurial > prosody-modules

annotate mod_pubsub_subscription/mod_pubsub_subscription.lua @ 5442:7480dde4cd2e

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mod_auth_oauth_external: Stub not implemented auth module methods Not providing some of these may trigger errors on use, which is something that would be nice to fix on the Prosody side, one day.
author Kim Alvefur <zash@zash.se>
date Wed, 10 May 2023 19:11:25 +0200
parents 97fac0ba0469
children b40750891bee
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97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
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1 local st = require "util.stanza";
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2 local uuid = require "util.uuid";
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3 local mt = require "util.multitable";
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4 local cache = require "util.cache";
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5
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6 local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
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7 local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";
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8
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9 -- TODO persist
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10 -- TODO query known pubsub nodes to sync current subscriptions
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11 -- TODO subscription ids per 'item' would be handy
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12
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13 local pending_subscription = cache.new(256); -- uuid → node
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14 local pending_unsubscription = cache.new(256); -- uuid → node
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15 local active_subscriptions = mt.new() -- service | node | uuid | { item }
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16 function module.save()
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17 return { active_subscriptions = active_subscriptions.data }
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18 end
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19 function module.restore(data)
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20 if data and data.active_subscriptions then
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21 active_subscriptions.data = data.active_subscriptions
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22 end
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23 end
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24
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25 local valid_events = {"subscribed"; "unsubscribed"; "error"; "item"; "retract"; "purge"; "delete"}
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26
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27 local function subscription_added(item_event)
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28 local item = item_event.item;
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29 assert(item.service, "pubsub subscription item MUST have a 'service' field.");
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30 assert(item.node, "pubsub subscription item MUST have a 'node' field.");
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31
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32 local already_subscibed = false;
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33 for _ in active_subscriptions:iter(item.service, item.node, nil) do -- luacheck: ignore 512
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34 already_subscibed = true;
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35 break
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36 end
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37
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38 item._id = uuid.generate();
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39 local iq_id = uuid.generate();
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40 pending_subscription:set(iq_id, item._id);
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41 active_subscriptions:set(item.service, item.node, item._id, item);
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42
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43 if not already_subscibed then
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44 module:send(st.iq({ type = "set", id = iq_id, from = module.host, to = item.service })
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45 :tag("pubsub", { xmlns = xmlns_pubsub })
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46 :tag("subscribe", { jid = module.host, node = item.node }));
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47 end
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48 end
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49
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50 for _, event_name in ipairs(valid_events) do
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51 module:hook("pubsub-event/host/"..event_name, function (event)
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52 for _, _, _, _, cb in active_subscriptions:iter(event.service, event.node, nil, "on_"..event_name) do
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53 pcall(cb, event);
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54 end
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55 end);
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56 end
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57
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58 module:hook("iq/host", function (event)
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59 local stanza = event.stanza;
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60 local service = stanza.attr.from;
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61
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62 if not stanza.attr.id then return end -- shouldn't be possible
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63
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64 local subscribed_node = pending_subscription:get(stanza.attr.id);
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65 pending_subscription:set(stanza.attr.id, nil);
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66 local unsubscribed_node = pending_unsubscription:get(stanza.attr.id);
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67 pending_unsubscription:set(stanza.attr.id, nil);
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68
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69 if stanza.attr.type == "result" then
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70 local pubsub_wrapper = stanza:get_child("pubsub", xmlns_pubsub);
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71 local subscription = pubsub_wrapper and pubsub_wrapper:get_child("subscription");
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72 if not subscription then return end
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73 local node = subscription.attr.node;
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74
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75 local what;
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76 if subscription.attr.subscription == "subscribed" then
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77 what = "on_subscribed";
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78 elseif subscription.attr.subscription == "none" then
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79 what = "on_unsubscribed";
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80 end
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81 if not what then return end -- there are other states but we don't handle them
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82 for _, _, _, _, cb in active_subscriptions:iter(service, node, nil, what) do
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83 cb(event);
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84 end
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85 return true;
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86
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87 elseif stanza.attr.type == "error" then
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88 local node = subscribed_node or unsubscribed_node;
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89 local error_type, error_condition, reason, pubsub_error = stanza:get_error();
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90 local err = { type = error_type, condition = error_condition, text = reason, extra = pubsub_error };
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91 if active_subscriptions:get(service) then
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92 for _, _, _, _, cb in active_subscriptions:iter(service, node, nil, "on_error") do
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93 cb(err);
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94 end
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95 return true;
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96 end
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97 end
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98 end, 1);
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99
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100 local function subscription_removed(item_event)
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101 local item = item_event.item;
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102 active_subscriptions:set(item.service, item.node, item._id, nil);
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103 local node_subs = active_subscriptions:get(item.service, item.node);
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104 if node_subs and next(node_subs) then return end
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105
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106 local iq_id = uuid.generate();
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107 pending_unsubscription:set(iq_id, item._id);
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108
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109 module:send(st.iq({ type = "set", id = iq_id, from = module.host, to = item.service })
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110 :tag("pubsub", { xmlns = xmlns_pubsub })
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111 :tag("unsubscribe", { jid = module.host, node = item.node }))
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112 end
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113
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114 module:handle_items("pubsub-subscription", subscription_added, subscription_removed, true);
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115
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116 module:hook("message/host", function(event)
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117 local origin, stanza = event.origin, event.stanza;
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118 local ret = nil;
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119 local service = stanza.attr.from;
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120 module:log("debug", "Got message/host: %s", stanza:top_tag());
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121 for event_container in stanza:childtags("event", xmlns_pubsub_event) do
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122 for pubsub_event in event_container:childtags() do
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123 module:log("debug", "Got pubsub event %s", pubsub_event:top_tag());
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124 local node = pubsub_event.attr.node;
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125 module:fire_event("pubsub-event/host/"..pubsub_event.name, {
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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126 stanza = stanza;
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
diff changeset
127 origin = origin;
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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128 event = pubsub_event;
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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129 service = service;
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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130 node = node;
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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131 });
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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132 ret = true;
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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133 end
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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134 end
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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135 return ret;
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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136 end);
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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137
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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138 module:hook("pubsub-event/host/items", function (event)
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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139 for item in event.event:childtags() do
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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140 module:log("debug", "Got pubsub item event %s", item:top_tag());
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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141 event.item = item;
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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142 event.payload = item.tags[1];
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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143 module:fire_event("pubsub-event/host/"..item.name, event);
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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144 end
97fac0ba0469 mod_pubsub_subscription: New module providing an API for pubsub subscriptions
Kim Alvefur <zash@zash.se>
parents:
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145 end);