Mercurial > prosody-modules

annotate mod_pubsub_serverinfo/mod_pubsub_serverinfo.lua @ 5812:cf5f77491323

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mod_pubsub_serverinfo: Refresh cache entries if they will expire before next run
author Matthew Wild <mwild1@gmail.com>
date Mon, 08 Jan 2024 15:38:18 +0000
parents 76b57bcfe1b2
children d38772479891
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local st = require "util.stanza";
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2 local new_id = require"util.id".medium;
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3 local dataform = require "util.dataforms".new;
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4
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5 local local_domain = module:get_host();
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6 local service = module:get_option(module.name .. "_service") or "pubsub." .. local_domain;
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7 local node = module:get_option(module.name .. "_node") or "serverinfo";
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8 local actor = module.host .. "/modules/" .. module.name;
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9 local publication_interval = module:get_option(module.name .. "_publication_interval") or 300;
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10 local cache_ttl = module:get_option(module.name .. "_cache_ttl") or 3600;
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11
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12 local opt_in_reports
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13
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14 function module.load()
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15 discover_node():next(
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16 function(exists)
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17 if not exists then create_node() end
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18 end
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19 ):catch(
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20 function(error)
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21 module:log("warn", "Error prevented discovery or creation of pub/sub node at %s: %s", service, error)
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22 end
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23 )
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24
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25 module:add_feature("urn:xmpp:serverinfo:0");
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26
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27 module:add_extension(dataform {
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28 { name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/network/serverinfo" },
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29 { name = "serverinfo-pubsub-node", type = "text-single" },
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30 }:form({ ["serverinfo-pubsub-node"] = ("xmpp:%s?;node=%s"):format(service, node) }, "result"));
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31
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32 cache_warm_up()
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33 module:add_timer(10, publish_serverinfo);
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34 end
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35
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36 function module.unload()
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37 -- This removes all subscribers, which may or may not be desirable, depending on the reason for the unload.
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38 delete_node(); -- Should this block, to delay unload() until the node is deleted?
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39 end
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40
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41 -- Returns a promise of a boolean
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42 function discover_node()
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43 local request = st.iq({ type = "get", to = service, from = actor, id = new_id() })
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44 :tag("query", { xmlns = "http://jabber.org/protocol/disco#items" })
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45
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46 module:log("debug", "Sending request to discover existence of pub/sub node '%s' at %s", node, service)
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47 return module:send_iq(request):next(
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48 function(response)
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49 if response.stanza == nil or response.stanza.attr.type ~= "result" then
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50 module:log("warn", "Unexpected response to service discovery items request at %s: %s", service, response.stanza)
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51 return false
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52 end
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53
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54 local query = response.stanza:get_child("query", "http://jabber.org/protocol/disco#items")
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55 if query ~= nil then
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56 for item in query:childtags("item") do
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57 if item.attr.jid == service and item.attr.node == node then
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58 module:log("debug", "pub/sub node '%s' at %s does exists.", node, service)
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59 return true
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60 end
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61 end
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62 end
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63 module:log("debug", "pub/sub node '%s' at %s does not exist.", node, service)
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64 return false;
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65 end
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66 );
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67 end
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68
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69 -- Returns a promise of a boolean
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70 function create_node()
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71 local request = st.iq({ type = "set", to = service, from = actor, id = new_id() })
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72 :tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
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73 :tag("create", { node = node }):up()
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74 :tag("configure")
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75 :tag("x", { xmlns = "jabber:x:data", type = "submit" })
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76 :tag("field", { var = "FORM_TYPE", type = "hidden"})
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77 :text_tag("value", "http://jabber.org/protocol/pubsub#node_config")
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78 :up()
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79 :tag("field", { var = "pubsub#max_items" })
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80 :text_tag("value", "1")
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81 :up()
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82 :tag("field", { var = "pubsub#persist_items" })
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83 :text_tag("value", "0")
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84
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85 module:log("debug", "Sending request to create pub/sub node '%s' at %s", node, service)
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86 return module:send_iq(request):next(
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87 function(response)
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88 if response.stanza == nil or response.stanza.attr.type ~= "result" then
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89 module:log("warn", "Unexpected response to pub/sub node '%s' creation request at %s: %s", node, service, response.stanza)
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90 return false
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91 else
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92 module:log("debug", "Successfully created pub/sub node '%s' at %s", node, service)
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93 return true
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94 end
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95 end
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96 )
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97 end
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98
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99 -- Returns a promise of a boolean
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100 function delete_node()
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101 local request = st.iq({ type = "set", to = service, from = actor, id = new_id() })
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102 :tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
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103 :tag("delete", { node = node });
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104
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105 module:log("debug", "Sending request to delete pub/sub node '%s' at %s", node, service)
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106 return module:send_iq(request):next(
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107 function(response)
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108 if response.stanza == nil or response.stanza.attr.type ~= "result" then
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109 module:log("warn", "Unexpected response to pub/sub node '%s' deletion request at %s: %s", node, service, response.stanza)
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110 return false
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111 else
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112 module:log("debug", "Successfully deleted pub/sub node '%s' at %s", node, service)
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113 return true
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114 end
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115 end
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116 )
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117 end
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118
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76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
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diff changeset
119 function get_remote_domain_names()
5803
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diff changeset
120 -- Iterate over s2s sessions, adding them to a multimap, where the key is the local domain name,
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diff changeset
121 -- mapped to a collection of remote domain names. De-duplicate all remote domain names by using
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
122 -- them as an index in a table.
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Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
123 local domains_by_host = {}
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Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
124 for session, _ in pairs(prosody.incoming_s2s) do
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diff changeset
125 if session ~= nil and session.from_host ~= nil and local_domain == session.to_host then
5808
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
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diff changeset
126 module:log("debug", "Local host '%s' has remote '%s' (inbound)", session.to_host, session.from_host);
5803
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diff changeset
127 local sessions = domains_by_host[session.to_host]
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diff changeset
128 if sessions == nil then sessions = {} end; -- instantiate a new entry if none existed
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
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diff changeset
129 sessions[session.from_host] = true
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diff changeset
130 domains_by_host[session.to_host] = sessions
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
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diff changeset
131 end
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diff changeset
132 end
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parents: 5801
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133
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Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
134 -- At an earlier stage, the code iterated over all prosody.hosts, trying to generate one pubsub item for all local hosts. That turned out to be
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
135 -- to noisy. Instead, this code now creates an item that includes the local vhost only. It is assumed that this module will also be loaded for
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
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136 -- other vhosts. Their data should then be published to distinct pub/sub services and nodes.
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
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diff changeset
137
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138 -- for host, data in pairs(prosody.hosts) do
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139 local host = local_domain
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Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
140 local data = prosody.hosts[host]
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diff changeset
141 if data ~= nil then
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Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
142 local sessions = domains_by_host[host]
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diff changeset
143 if sessions == nil then sessions = {} end; -- instantiate a new entry if none existed
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
144 if data.s2sout ~= nil then
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
145 for _, session in pairs(data.s2sout) do
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
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diff changeset
146 if session.to_host ~= nil then
5808
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
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147 module:log("debug", "Local host '%s' has remote '%s' (outbound)", host, session.to_host);
5803
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diff changeset
148 sessions[session.to_host] = true
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diff changeset
149 domains_by_host[host] = sessions
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150 end
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151 end
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Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
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152 end
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2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
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153
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
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154 -- When the instance of Prosody hosts more than one host, the other hosts can be thought of as having a 'permanent' s2s connection.
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
155 for host_name, host_info in pairs(prosody.hosts) do
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5805
diff changeset
156 if host ~= host_name and host_info.type ~= "component" then
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5805
diff changeset
157 module:log("debug", "Local host '%s' has remote '%s' (vhost)", host, host_name);
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
158 sessions[host_name] = true;
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diff changeset
159 domains_by_host[host] = sessions
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
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160 end
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5805
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161 end
5803
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162 end
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163
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diff changeset
164 return domains_by_host
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
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165 end
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Guus der Kinderen <guus.der.kinderen@gmail.com>
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166
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
167 function publish_serverinfo()
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
168 local domains_by_host = get_remote_domain_names()
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
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169
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170 -- Build the publication stanza.
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diff changeset
171 local request = st.iq({ type = "set", to = service, from = actor, id = new_id() })
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diff changeset
172 :tag("pubsub", { xmlns = "http://jabber.org/protocol/pubsub" })
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diff changeset
173 :tag("publish", { node = node, xmlns = "http://jabber.org/protocol/pubsub" })
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diff changeset
174 :tag("item", { id = "current", xmlns = "http://jabber.org/protocol/pubsub" })
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
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diff changeset
175 :tag("serverinfo", { xmlns = "urn:xmpp:serverinfo:0" })
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Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
176
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
177 request:tag("domain", { name = local_domain })
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diff changeset
178 :tag("federation")
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179
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diff changeset
180 local remotes = domains_by_host[local_domain]
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diff changeset
181
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
182 if remotes ~= nil then
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
183 for remote, _ in pairs(remotes) do
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
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parents: 5801
diff changeset
184 -- include a domain name for remote domains, but only if they advertise support.
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
185 if does_opt_in(remote) then
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
186 request:tag("remote-domain", { name = remote }):up()
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
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parents: 5801
diff changeset
187 else
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
188 request:tag("remote-domain"):up()
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Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
189 end
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
190 end
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Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
191 end
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
192
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
193 request:up():up()
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
194
5804
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
195 module:send_iq(request):next(
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
196 function(response)
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
197 if response.stanza == nil or response.stanza.attr.type ~= "result" then
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
198 module:log("warn", "Unexpected response to item publication at pub/sub node '%s' on %s: %s", node, service, response.stanza)
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
199 return false
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
200 else
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
201 module:log("debug", "Successfully published item on pub/sub node '%s' at %s", node, service)
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
202 return true
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
203 end
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
204 end,
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
205 function(error)
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
206 module:log("warn", "Error prevented publication of item on pub/sub node at %s: %s", service, error)
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
207 end
c3eeeb968403 mod_pubsub_serverinfo: Detect existence of pub/sub node
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5803
diff changeset
208 )
5803
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
209
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
210 return publication_interval;
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
211 end
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
212
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
213 local opt_in_cache = {}
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
214
5810
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Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
215 function cache_warm_up()
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
216 module:log("debug", "Warming up opt-in cache")
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
217 local domains_by_host = get_remote_domain_names()
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
218 local remotes = domains_by_host[local_domain]
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
219 if remotes ~= nil then
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
220 for remote, _ in pairs(remotes) do
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
221 does_opt_in(remote)
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
222 end
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
223 end
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
224 end
76b57bcfe1b2 mod_pubsub_serverinfo: Warm-up opt-in cache
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5809
diff changeset
225
5803
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Guus der Kinderen <guus.der.kinderen@gmail.com>
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diff changeset
226 function does_opt_in(remoteDomain)
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
227
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
228 -- try to read answer from cache.
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
229 local cached_value = opt_in_cache[remoteDomain]
5812
cf5f77491323 mod_pubsub_serverinfo: Refresh cache entries if they will expire before next run
Matthew Wild <mwild1@gmail.com>
parents: 5810
diff changeset
230 local ttl = cached_value and os.difftime(cached_value.expires, os.time());
cf5f77491323 mod_pubsub_serverinfo: Refresh cache entries if they will expire before next run
Matthew Wild <mwild1@gmail.com>
parents: 5810
diff changeset
231 if cached_value and ttl > (publication_interval + 60) then
5808
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5805
diff changeset
232 module:log("debug", "Opt-in status (from cache) for '%s': %s", remoteDomain, cached_value.opt_in)
5803
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
233 return cached_value.opt_in;
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
234 end
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
235
5812
cf5f77491323 mod_pubsub_serverinfo: Refresh cache entries if they will expire before next run
Matthew Wild <mwild1@gmail.com>
parents: 5810
diff changeset
236 -- We don't have a cached value, or it is nearing expiration - refresh it now
5803
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
237 -- TODO worry about not having multiple requests in flight to the same domain.cached_value
f55e65315ba0 mod_pubsub_serverinfo: implemented all basic features
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5801
diff changeset
238
5808
2465d5191ae9 mod_pubsub_serverinfo: Consider sibling vhosts 'connected'
Guus der Kinderen <guus.der.kinderen@gmail.com>
parents: 5805
diff changeset
239 module:log("debug", "No cached opt-in status for '%s': performing disco/info to determine opt-in.", remoteDomain)
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240 local discoRequest = st.iq({ type = "get", to = remoteDomain, from = actor, id = new_id() })
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241 :tag("query", { xmlns = "http://jabber.org/protocol/disco#info" })
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242
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243 module:send_iq(discoRequest):next(
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244 function(response)
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245 if response.stanza ~= nil and response.stanza.attr.type == "result" then
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246 local query = response.stanza:get_child("query", "http://jabber.org/protocol/disco#info")
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247 if query ~= nil then
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248 for feature in query:childtags("feature") do
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249 module:log("debug", "Disco/info feature for '%s': %s", remoteDomain, feature)
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250 if feature.attr.var == 'urn:xmpp:serverinfo:0' then
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251 module:log("debug", "Disco/info response included opt-in for '%s'", remoteDomain)
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252 opt_in_cache[remoteDomain] = {
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253 opt_in = true;
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254 expires = os.time() + cache_ttl;
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255 }
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256 return; -- prevent 'false' to be cached, down below.
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257 end
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258 end
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259 end
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260 end
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261 module:log("debug", "Disco/info response did not include opt-in for '%s'", remoteDomain)
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262 opt_in_cache[remoteDomain] = {
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263 opt_in = false;
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264 expires = os.time() + cache_ttl;
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265 }
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266 end,
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267 function(response)
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268 module:log("debug", "An error occurred while performing a disco/info request to determine opt-in for '%s'", remoteDomain, response)
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269 opt_in_cache[remoteDomain] = {
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270 opt_in = false;
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271 expires = os.time() + cache_ttl;
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272 }
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273 end
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274 );
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275
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276 if ttl and ttl <= 0 then
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277 -- Cache entry expired, remove it and assume not opted in
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278 opt_in_cache[remoteDomain] = nil;
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279 return false;
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280 end
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281
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282 return cached_value and cached_value.opt_in;
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283 end