diff options
Diffstat (limited to 'plugins/mod_pubsub.lua')
| -rw-r--r-- | plugins/mod_pubsub.lua | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/plugins/mod_pubsub.lua b/plugins/mod_pubsub.lua new file mode 100644 index 00000000..dc1b1263 --- /dev/null +++ b/plugins/mod_pubsub.lua @@ -0,0 +1,205 @@ +local pubsub = require "util.pubsub"; +local st = require "util.stanza"; +local jid_bare = require "util.jid".bare; +local uuid_generate = require "util.uuid".generate; + +require "core.modulemanager".load(module.host, "iq"); + +local xmlns_pubsub = "http://jabber.org/protocol/pubsub"; +local xmlns_pubsub_errors = "http://jabber.org/protocol/pubsub#errors"; +local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event"; + +local service; + +local handlers = {}; + +function handle_pubsub_iq(event) + local origin, stanza = event.origin, event.stanza; + local pubsub = stanza.tags[1]; + local action = pubsub.tags[1]; + local handler = handlers[stanza.attr.type.."_"..action.name]; + if handler then + handler(origin, stanza, action); + return true; + end +end + +local pubsub_errors = { + ["conflict"] = { "cancel", "conflict" }; + ["invalid-jid"] = { "modify", "bad-request", nil, "invalid-jid" }; + ["item-not-found"] = { "cancel", "item-not-found" }; + ["not-subscribed"] = { "modify", "unexpected-request", nil, "not-subscribed" }; +}; +function pubsub_error_reply(stanza, error) + local e = pubsub_errors[error]; + local reply = st.error_reply(stanza, unpack(e, 1, 3)); + if e[4] then + reply:tag(e[4], { xmlns = xmlns_pubsub_errors }):up(); + end + return reply; +end + +function handlers.get_items(origin, stanza, items) + local node = items.attr.node; + local item = items:get_child("item"); + local id = item and item.attr.id; + local data = st.stanza("items", { node = node }); + for _, entry in pairs(service:get(node, stanza.attr.from, id)) do + data:add_child(entry); + end + if data then + reply = st.reply(stanza) + :tag("pubsub", { xmlns = xmlns_pubsub }) + :add_child(data); + else + reply = pubsub_error_reply(stanza, "item-not-found"); + end + return origin.send(reply); +end + +function handlers.set_create(origin, stanza, create) + local node = create.attr.node; + local ok, ret, reply; + if node then + ok, ret = service:create(node, stanza.attr.from); + if ok then + reply = st.reply(stanza); + else + reply = pubsub_error_reply(stanza, ret); + end + else + repeat + node = uuid_generate(); + ok, ret = service:create(node, stanza.attr.from); + until ok; + reply = st.reply(stanza) + :tag("pubsub", { xmlns = xmlns_pubsub }) + :tag("create", { node = node }); + end + return origin.send(reply); +end + +function handlers.set_subscribe(origin, stanza, subscribe) + local node, jid = subscribe.attr.node, subscribe.attr.jid; + if jid_bare(jid) ~= jid_bare(stanza.attr.from) then + return origin.send(pubsub_error_reply(stanza, "invalid-jid")); + end + local ok, ret = service:add_subscription(node, stanza.attr.from, jid); + local reply; + if ok then + reply = st.reply(stanza) + :tag("pubsub", { xmlns = xmlns_pubsub }) + :tag("subscription", { + node = node, + jid = jid, + subscription = "subscribed" + }); + else + reply = pubsub_error_reply(stanza, ret); + end + return origin.send(reply); +end + +function handlers.set_unsubscribe(origin, stanza, unsubscribe) + local node, jid = unsubscribe.attr.node, unsubscribe.attr.jid; + if jid_bare(jid) ~= jid_bare(stanza.attr.from) then + return origin.send(pubsub_error_reply(stanza, "invalid-jid")); + end + local ok, ret = service:remove_subscription(node, stanza.attr.from, jid); + local reply; + if ok then + reply = st.reply(stanza); + else + reply = pubsub_error_reply(stanza, ret); + end + return origin.send(reply); +end + +function handlers.set_publish(origin, stanza, publish) + local node = publish.attr.node; + local item = publish:get_child("item"); + local id = (item and item.attr.id) or uuid_generate(); + local ok, ret = service:publish(node, stanza.attr.from, id, item); + local reply; + if ok then + reply = st.reply(stanza) + :tag("pubsub", { xmlns = xmlns_pubsub }) + :tag("publish", { node = node }) + :tag("item", { id = id }); + else + reply = pubsub_error_reply(stanza, ret); + end + return origin.send(reply); +end + +function handlers.set_retract(origin, stanza, retract) + local node, notify = retract.attr.node, retract.attr.notify; + notify = (notify == "1") or (notify == "true"); + local item = retract:get_child("item"); + local id = item and item.attr.id + local reply, notifier; + if notify then + notifier = st.stanza("retract", { id = id }); + end + local ok, ret = service:retract(node, stanza.attr.from, id, notifier); + if ok then + reply = st.reply(stanza); + else + reply = pubsub_error_reply(stanza, ret); + end + return origin.send(reply); +end + +function simple_broadcast(node, jids, item) + item = st.clone(item); + item.attr.xmlns = nil; -- Clear the pubsub namespace + local message = st.message({ from = module.host, type = "headline" }) + :tag("event", { xmlns = xmlns_pubsub_event }) + :tag("items", { node = node }) + :add_child(item); + for jid in pairs(jids) do + module:log("debug", "Sending notification to %s", jid); + message.attr.to = jid; + core_post_stanza(hosts[module.host], message); + end +end + +module:hook("iq/host/http://jabber.org/protocol/pubsub:pubsub", handle_pubsub_iq); + +local disco_info = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" }) + :tag("identity", { category = "pubsub", type = "service" }):up() + :tag("feature", { var = "http://jabber.org/protocol/pubsub" }):up(); + +module:hook("iq-get/host/http://jabber.org/protocol/disco#info:query", function (event) + event.origin.send(st.reply(event.stanza):add_child(disco_info)); + return true; +end); + +module:hook("iq-get/host/http://jabber.org/protocol/disco#items:query", function (event) + local ok, ret = service:get_nodes(event.stanza.attr.from); + if not ok then + event.origin.send(pubsub_error_reply(stanza, ret)); + else + local reply = st.reply(event.stanza) + :tag("query", { xmlns = "http://jabber.org/protocol/disco#items" }); + for node, node_obj in pairs(ret) do + reply:tag("item", { jid = module.host, node = node, name = node_obj.config.name }):up(); + end + event.origin.send(reply); + end + return true; +end); + +service = pubsub.new({ + broadcaster = simple_broadcast +}); +module.environment.service = service; + +function module.save() + return { service = service }; +end + +function module.restore(data) + service = data.service; + module.environment.service = service; +end |