Fri, 17 Dec 2010 17:28:05 +0100
util.stanza: Iterate on childtags instead of all childs.
3619 | 1 | local pubsub = require "util.pubsub"; |
2 | local st = require "util.stanza"; | |
3 | local jid_bare = require "util.jid".bare; | |
4 | local uuid_generate = require "util.uuid".generate; | |
5 | ||
6 | require "core.modulemanager".load(module.host, "iq"); | |
7 | ||
8 | local xmlns_pubsub = "http://jabber.org/protocol/pubsub"; | |
9 | local xmlns_pubsub_errors = "http://jabber.org/protocol/pubsub#errors"; | |
10 | local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event"; | |
11 | ||
12 | local service; | |
13 | ||
14 | local handlers = {}; | |
15 | ||
16 | function handle_pubsub_iq(event) | |
17 | local origin, stanza = event.origin, event.stanza; | |
18 | local pubsub = stanza.tags[1]; | |
19 | local action = pubsub.tags[1]; | |
20 | local handler = handlers[stanza.attr.type.."_"..action.name]; | |
21 | if handler then | |
22 | handler(origin, stanza, action); | |
23 | return true; | |
24 | end | |
25 | end | |
26 | ||
27 | local pubsub_errors = { | |
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28 | ["conflict"] = { "cancel", "conflict" }; |
3619 | 29 | ["invalid-jid"] = { "modify", "bad-request", nil, "invalid-jid" }; |
30 | ["item-not-found"] = { "cancel", "item-not-found" }; | |
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31 | ["not-subscribed"] = { "modify", "unexpected-request", nil, "not-subscribed" }; |
3619 | 32 | }; |
33 | function pubsub_error_reply(stanza, error) | |
34 | local e = pubsub_errors[error]; | |
35 | local reply = st.error_reply(stanza, unpack(e, 1, 3)); | |
36 | if e[4] then | |
37 | reply:tag(e[4], { xmlns = xmlns_pubsub_errors }):up(); | |
38 | end | |
39 | return reply; | |
40 | end | |
41 | ||
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42 | function handlers.get_items(origin, stanza, items) |
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43 | local node = items.attr.node; |
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44 | local item = items:get_child("item"); |
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45 | local id = item and item.attr.id; |
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46 | local data = st.stanza("items", { node = node }); |
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47 | for _, entry in pairs(service:get(node, stanza.attr.from, id)) do |
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48 | data:add_child(entry); |
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49 | end |
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50 | if data then |
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51 | reply = st.reply(stanza) |
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52 | :tag("pubsub", { xmlns = xmlns_pubsub }) |
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53 | :add_child(data); |
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54 | else |
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55 | reply = pubsub_error_reply(stanza, "item-not-found"); |
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56 | end |
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57 | return origin.send(reply); |
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58 | end |
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59 | |
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60 | function handlers.set_create(origin, stanza, create) |
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61 | local node = create.attr.node; |
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62 | local ok, ret, reply; |
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63 | if node then |
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64 | ok, ret = service:create(node, stanza.attr.from); |
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65 | if ok then |
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66 | reply = st.reply(stanza); |
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67 | else |
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68 | reply = pubsub_error_reply(stanza, ret); |
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69 | end |
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70 | else |
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71 | repeat |
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72 | node = uuid_generate(); |
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73 | ok, ret = service:create(node, stanza.attr.from); |
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74 | until ok; |
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75 | reply = st.reply(stanza) |
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76 | :tag("pubsub", { xmlns = xmlns_pubsub }) |
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77 | :tag("create", { node = node }); |
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78 | end |
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79 | return origin.send(reply); |
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80 | end |
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81 | |
3619 | 82 | function handlers.set_subscribe(origin, stanza, subscribe) |
83 | local node, jid = subscribe.attr.node, subscribe.attr.jid; | |
84 | if jid_bare(jid) ~= jid_bare(stanza.attr.from) then | |
85 | return origin.send(pubsub_error_reply(stanza, "invalid-jid")); | |
86 | end | |
87 | local ok, ret = service:add_subscription(node, stanza.attr.from, jid); | |
88 | local reply; | |
89 | if ok then | |
90 | reply = st.reply(stanza) | |
91 | :tag("pubsub", { xmlns = xmlns_pubsub }) | |
92 | :tag("subscription", { | |
93 | node = node, | |
94 | jid = jid, | |
95 | subscription = "subscribed" | |
96 | }); | |
97 | else | |
98 | reply = pubsub_error_reply(stanza, ret); | |
99 | end | |
100 | return origin.send(reply); | |
101 | end | |
102 | ||
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103 | function handlers.set_unsubscribe(origin, stanza, unsubscribe) |
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104 | local node, jid = unsubscribe.attr.node, unsubscribe.attr.jid; |
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105 | if jid_bare(jid) ~= jid_bare(stanza.attr.from) then |
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106 | return origin.send(pubsub_error_reply(stanza, "invalid-jid")); |
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107 | end |
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108 | local ok, ret = service:remove_subscription(node, stanza.attr.from, jid); |
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109 | local reply; |
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110 | if ok then |
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111 | reply = st.reply(stanza); |
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112 | else |
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113 | reply = pubsub_error_reply(stanza, ret); |
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114 | end |
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115 | return origin.send(reply); |
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116 | end |
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117 | |
3619 | 118 | function handlers.set_publish(origin, stanza, publish) |
119 | local node = publish.attr.node; | |
120 | local item = publish:get_child("item"); | |
121 | local id = (item and item.attr.id) or uuid_generate(); | |
122 | local ok, ret = service:publish(node, stanza.attr.from, id, item); | |
123 | local reply; | |
124 | if ok then | |
125 | reply = st.reply(stanza) | |
126 | :tag("pubsub", { xmlns = xmlns_pubsub }) | |
127 | :tag("publish", { node = node }) | |
128 | :tag("item", { id = id }); | |
129 | else | |
130 | reply = pubsub_error_reply(stanza, ret); | |
131 | end | |
132 | return origin.send(reply); | |
133 | end | |
134 | ||
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135 | function handlers.set_retract(origin, stanza, retract) |
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136 | local node, notify = retract.attr.node, retract.attr.notify; |
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137 | notify = (notify == "1") or (notify == "true"); |
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138 | local item = retract:get_child("item"); |
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139 | local id = item and item.attr.id |
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140 | local reply, notifier; |
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141 | if notify then |
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142 | notifier = st.stanza("retract", { id = id }); |
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143 | end |
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144 | local ok, ret = service:retract(node, stanza.attr.from, id, notifier); |
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145 | if ok then |
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146 | reply = st.reply(stanza); |
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147 | else |
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148 | reply = pubsub_error_reply(stanza, ret); |
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149 | end |
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150 | return origin.send(reply); |
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151 | end |
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152 | |
3619 | 153 | function simple_broadcast(node, jids, item) |
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154 | item = st.clone(item); |
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155 | item.attr.xmlns = nil; -- Clear the pubsub namespace |
3619 | 156 | local message = st.message({ from = module.host, type = "headline" }) |
157 | :tag("event", { xmlns = xmlns_pubsub_event }) | |
158 | :tag("items", { node = node }) | |
159 | :add_child(item); | |
160 | for jid in pairs(jids) do | |
161 | module:log("debug", "Sending notification to %s", jid); | |
162 | message.attr.to = jid; | |
163 | core_post_stanza(hosts[module.host], message); | |
164 | end | |
165 | end | |
166 | ||
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167 | module:hook("iq/host/http://jabber.org/protocol/pubsub:pubsub", handle_pubsub_iq); |
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168 | |
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169 | local disco_info = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" }) |
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170 | :tag("identity", { category = "pubsub", type = "service" }):up() |
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171 | :tag("feature", { var = "http://jabber.org/protocol/pubsub" }):up(); |
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172 | |
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173 | module:hook("iq-get/host/http://jabber.org/protocol/disco#info:query", function (event) |
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174 | event.origin.send(st.reply(event.stanza):add_child(disco_info)); |
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175 | return true; |
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176 | end); |
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177 | |
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178 | module:hook("iq-get/host/http://jabber.org/protocol/disco#items:query", function (event) |
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179 | local ok, ret = service:get_nodes(event.stanza.attr.from); |
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180 | if not ok then |
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181 | event.origin.send(pubsub_error_reply(stanza, ret)); |
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182 | else |
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183 | local reply = st.reply(event.stanza) |
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184 | :tag("query", { xmlns = "http://jabber.org/protocol/disco#items" }); |
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185 | for node, node_obj in pairs(ret) do |
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186 | reply:tag("item", { jid = module.host, node = node, name = node_obj.config.name }):up(); |
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187 | end |
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188 | event.origin.send(reply); |
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189 | end |
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190 | return true; |
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191 | end); |
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192 | |
3619 | 193 | service = pubsub.new({ |
194 | broadcaster = simple_broadcast | |
195 | }); | |
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196 | module.environment.service = service; |
3619 | 197 | |
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198 | function module.save() |
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199 | return { service = service }; |
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200 | end |
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201 | |
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202 | function module.restore(data) |
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203 | service = data.service; |
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204 | module.environment.service = service; |
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205 | end |