plugins/mod_pubsub/mod_pubsub.lua
author Kim Alvefur <zash@zash.se>
Mon, 30 Dec 2013 21:49:17 +0100
changeset 5970 6a2c3293d4d7
parent 5690 630e7224a65f
child 5973 905b4fd863b4
child 6437 382e03a40dd2
permissions -rw-r--r--
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local pubsub = require "util.pubsub";
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local st = require "util.stanza";
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local jid_bare = require "util.jid".bare;
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local usermanager = require "core.usermanager";
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local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
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local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";
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local xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner";
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local autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
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local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
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local pubsub_disco_name = module:get_option("name");
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if type(pubsub_disco_name) ~= "string" then pubsub_disco_name = "Prosody PubSub Service"; end
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local service;
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local lib_pubsub = module:require "pubsub";
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local handlers = lib_pubsub.handlers;
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local pubsub_error_reply = lib_pubsub.pubsub_error_reply;
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module:depends("disco");
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module:add_identity("pubsub", "service", pubsub_disco_name);
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module:add_feature("http://jabber.org/protocol/pubsub");
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function handle_pubsub_iq(event)
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	local origin, stanza = event.origin, event.stanza;
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	local pubsub = stanza.tags[1];
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	local action = pubsub.tags[1];
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	if not action then
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		return origin.send(st.error_reply(stanza, "cancel", "bad-request"));
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	end
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	local handler = handlers[stanza.attr.type.."_"..action.name];
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	if handler then
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		handler(origin, stanza, action, service);
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		return true;
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	end
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end
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function simple_broadcast(kind, node, jids, item)
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	if item then
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		item = st.clone(item);
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		item.attr.xmlns = nil; -- Clear the pubsub namespace
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	end
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	local message = st.message({ from = module.host, type = "headline" })
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		:tag("event", { xmlns = xmlns_pubsub_event })
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			:tag(kind, { node = node })
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				:add_child(item);
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	for jid in pairs(jids) do
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		module:log("debug", "Sending notification to %s", jid);
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		message.attr.to = jid;
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		module:send(message);
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	end
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end
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module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
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module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
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local feature_map = {
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	create = { "create-nodes", "instant-nodes", "item-ids" };
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	retract = { "delete-items", "retract-items" };
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	purge = { "purge-nodes" };
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	publish = { "publish", autocreate_on_publish and "auto-create" };
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	delete = { "delete-nodes" };
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	get_items = { "retrieve-items" };
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	add_subscription = { "subscribe" };
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	get_subscriptions = { "retrieve-subscriptions" };
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};
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local function add_disco_features_from_service(service)
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	for method, features in pairs(feature_map) do
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		if service[method] then
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			for _, feature in ipairs(features) do
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				if feature then
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					module:add_feature(xmlns_pubsub.."#"..feature);
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				end
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			end
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		end
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	end
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	for affiliation in pairs(service.config.capabilities) do
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		if affiliation ~= "none" and affiliation ~= "owner" then
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			module:add_feature(xmlns_pubsub.."#"..affiliation.."-affiliation");
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		end
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	end
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end
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module:hook("host-disco-info-node", function (event)
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	local stanza, origin, reply, node = event.stanza, event.origin, event.reply, event.node;
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	local ok, ret = service:get_nodes(stanza.attr.from);
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	if not ok or not ret[node] then
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		return;
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	end
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	event.exists = true;
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	reply:tag("identity", { category = "pubsub", type = "leaf" });
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end);
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module:hook("host-disco-items-node", function (event)
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	local stanza, origin, reply, node = event.stanza, event.origin, event.reply, event.node;
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	local ok, ret = service:get_items(node, stanza.attr.from);
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	if not ok then
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		return;
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	end
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	for id, item in pairs(ret) do
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		reply:tag("item", { jid = module.host, name = id }):up();
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	end
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	event.exists = true;
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end);
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module:hook("host-disco-items", function (event)
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	local stanza, origin, reply = event.stanza, event.origin, event.reply;
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	local ok, ret = service:get_nodes(event.stanza.attr.from);
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	if not ok then
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		return;
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	end
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	for node, node_obj in pairs(ret) do
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		reply:tag("item", { jid = module.host, node = node, name = node_obj.config.name }):up();
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	end
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end);
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local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
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local function get_affiliation(jid)
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	local bare_jid = jid_bare(jid);
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	if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
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		return admin_aff;
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	end
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end
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function set_service(new_service)
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	service = new_service;
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	module.environment.service = service;
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	add_disco_features_from_service(service);
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end
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function module.save()
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	return { service = service };
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end
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function module.restore(data)
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	set_service(data.service);
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end
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function module.load()
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	if module.reloading then return; end
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	set_service(pubsub.new({
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		capabilities = {
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			none = {
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				create = false;
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				publish = false;
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				retract = false;
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				get_nodes = true;
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				subscribe = true;
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				unsubscribe = true;
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				get_subscription = true;
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				get_subscriptions = true;
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				get_items = true;
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				subscribe_other = false;
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				unsubscribe_other = false;
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				get_subscription_other = false;
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				get_subscriptions_other = false;
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				be_subscribed = true;
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				be_unsubscribed = true;
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				set_affiliation = false;
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			};
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			publisher = {
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				create = false;
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				publish = true;
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				retract = true;
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				get_nodes = true;
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				subscribe = true;
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				unsubscribe = true;
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				get_subscription = true;
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				get_subscriptions = true;
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				get_items = true;
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				subscribe_other = false;
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				unsubscribe_other = false;
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				get_subscription_other = false;
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				get_subscriptions_other = false;
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				be_subscribed = true;
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				be_unsubscribed = true;
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				set_affiliation = false;
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			};
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			owner = {
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				create = true;
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				publish = true;
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				retract = true;
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				delete = true;
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				get_nodes = true;
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				subscribe = true;
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				unsubscribe = true;
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				get_subscription = true;
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				get_subscriptions = true;
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				get_items = true;
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				subscribe_other = true;
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				unsubscribe_other = true;
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				get_subscription_other = true;
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				get_subscriptions_other = true;
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				be_subscribed = true;
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				be_unsubscribed = true;
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				set_affiliation = true;
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			};
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		};
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		autocreate_on_publish = autocreate_on_publish;
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		autocreate_on_subscribe = autocreate_on_subscribe;
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		broadcaster = simple_broadcast;
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		get_affiliation = get_affiliation;
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		normalize_jid = jid_bare;
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	}));
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end