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plugins/mod_pubsub.lua @ 3700:c8fcd63e9526
mod_pubsub: Ensure <item> is in correct scope when broadcasting an event
author | Matthew Wild <mwild1@gmail.com> |
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date | Sun, 05 Dec 2010 19:54:48 +0000 |
parent | 3699:150e58d69e60 |
child | 3760:3bfb65496773 |
rev | line source |
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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 |
3619 | 169 service = pubsub.new({ |
170 broadcaster = simple_broadcast | |
171 }); | |
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172 module.environment.service = service; |
3619 | 173 |