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plugins/mod_pubsub.lua @ 3732:bf449ecf2144
mod_storage_sql: Auto-initialize SQLite3 database.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Sun, 12 Dec 2010 05:39:24 +0500 |
parent | 3700:c8fcd63e9526 |
child | 3760:3bfb65496773 |
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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); service = pubsub.new({ broadcaster = simple_broadcast }); module.environment.service = service;