prosody
8416d4619d80

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Software / code / prosody

Changeset

5626:8416d4619d80

mod_pubsub: Split out handlers into a module library
author Florian Zeitz <florob@babelmonkeys.de>
date Fri, 17 May 2013 18:33:32 +0200
parents 5625:e67891ad18d6
children 5627:0439d1349dc1
files plugins/mod_pubsub.lua plugins/mod_pubsub/mod_pubsub.lua plugins/mod_pubsub/pubsub.lib.lua
diffstat 3 files changed, 476 insertions(+), 463 deletions(-) [+]
line wrap: on
line diff
--- a/plugins/mod_pubsub.lua	Fri May 24 14:46:16 2013 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,463 +0,0 @@
-local pubsub = require "util.pubsub";
-local st = require "util.stanza";
-local jid_bare = require "util.jid".bare;
-local uuid_generate = require "util.uuid".generate;
-local usermanager = require "core.usermanager";
-
-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 xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner";
-
-local autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
-local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
-local pubsub_disco_name = module:get_option("name");
-if type(pubsub_disco_name) ~= "string" then pubsub_disco_name = "Prosody PubSub Service"; end
-
-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];
-	if not action then
-		return origin.send(st.error_reply(stanza, "cancel", "bad-request"));
-	end
-	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" };
-	["jid-required"] = { "modify", "bad-request", nil, "jid-required" };
-	["nodeid-required"] = { "modify", "bad-request", nil, "nodeid-required" };
-	["item-not-found"] = { "cancel", "item-not-found" };
-	["not-subscribed"] = { "modify", "unexpected-request", nil, "not-subscribed" };
-	["forbidden"] = { "cancel", "forbidden" };
-};
-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;
-	
-	if not node then
-		return origin.send(pubsub_error_reply(stanza, "nodeid-required"));
-	end
-	local ok, results = service:get_items(node, stanza.attr.from, id);
-	if not ok then
-		return origin.send(pubsub_error_reply(stanza, results));
-	end
-	
-	local data = st.stanza("items", { node = node });
-	for _, entry in pairs(results) do
-		data:add_child(entry);
-	end
-	local reply;
-	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.get_subscriptions(origin, stanza, subscriptions)
-	local node = subscriptions.attr.node;
-	local ok, ret = service:get_subscriptions(node, stanza.attr.from, stanza.attr.from);
-	if not ok then
-		return origin.send(pubsub_error_reply(stanza, ret));
-	end
-	local reply = st.reply(stanza)
-		:tag("pubsub", { xmlns = xmlns_pubsub })
-			:tag("subscriptions");
-	for _, sub in ipairs(ret) do
-		reply:tag("subscription", { node = sub.node, jid = sub.jid, subscription = 'subscribed' }):up();
-	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 or ret ~= "conflict";
-		if ok then
-			reply = st.reply(stanza)
-				:tag("pubsub", { xmlns = xmlns_pubsub })
-					:tag("create", { node = node });
-		else
-			reply = pubsub_error_reply(stanza, ret);
-		end
-	end
-	return origin.send(reply);
-end
-
-function handlers.set_delete(origin, stanza, delete)
-	local node = delete.attr.node;
-
-	local reply, notifier;
-	if not node then
-		return origin.send(pubsub_error_reply(stanza, "nodeid-required"));
-	end
-	local ok, ret = service:delete(node, stanza.attr.from);
-	if ok then
-		reply = st.reply(stanza);
-	else
-		reply = pubsub_error_reply(stanza, ret);
-	end
-	return origin.send(reply);
-end
-
-function handlers.set_subscribe(origin, stanza, subscribe)
-	local node, jid = subscribe.attr.node, subscribe.attr.jid;
-	if not (node and jid) then
-		return origin.send(pubsub_error_reply(stanza, jid and "nodeid-required" or "invalid-jid"));
-	end
-	--[[
-	local options_tag, options = stanza.tags[1]:get_child("options"), nil;
-	if options_tag then
-		options = options_form:data(options_tag.tags[1]);
-	end
-	--]]
-	local options_tag, options; -- FIXME
-	local ok, ret = service:add_subscription(node, stanza.attr.from, jid, options);
-	local reply;
-	if ok then
-		reply = st.reply(stanza)
-			:tag("pubsub", { xmlns = xmlns_pubsub })
-				:tag("subscription", {
-					node = node,
-					jid = jid,
-					subscription = "subscribed"
-				}):up();
-		if options_tag then
-			reply:add_child(options_tag);
-		end
-	else
-		reply = pubsub_error_reply(stanza, ret);
-	end
-	origin.send(reply);
-end
-
-function handlers.set_unsubscribe(origin, stanza, unsubscribe)
-	local node, jid = unsubscribe.attr.node, unsubscribe.attr.jid;
-	if not (node and jid) then
-		return origin.send(pubsub_error_reply(stanza, jid and "nodeid-required" or "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;
-	if not node then
-		return origin.send(pubsub_error_reply(stanza, "nodeid-required"));
-	end
-	local item = publish:get_child("item");
-	local id = (item and item.attr.id);
-	if not id then
-		id = uuid_generate();
-		if item then
-			item.attr.id = id;
-		end
-	end
-	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
-	if not (node and id) then
-		return origin.send(pubsub_error_reply(stanza, node and "item-not-found" or "nodeid-required"));
-	end
-	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 handlers.set_purge(origin, stanza, purge)
-	local node, notify = purge.attr.node, purge.attr.notify;
-	notify = (notify == "1") or (notify == "true");
-	local reply;
-	if not node then
-		return origin.send(pubsub_error_reply(stanza, "nodeid-required"));
-	end
-	local ok, ret = service:purge(node, stanza.attr.from, notify);
-	if ok then
-		reply = st.reply(stanza);
-	else
-		reply = pubsub_error_reply(stanza, ret);
-	end
-	return origin.send(reply);
-end
-
-function simple_broadcast(kind, node, jids, item)
-	if item then
-		item = st.clone(item);
-		item.attr.xmlns = nil; -- Clear the pubsub namespace
-	end
-	local message = st.message({ from = module.host, type = "headline" })
-		:tag("event", { xmlns = xmlns_pubsub_event })
-			:tag(kind, { node = node })
-				:add_child(item);
-	for jid in pairs(jids) do
-		module:log("debug", "Sending notification to %s", jid);
-		message.attr.to = jid;
-		module:send(message);
-	end
-end
-
-module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
-module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
-
-local disco_info;
-
-local feature_map = {
-	create = { "create-nodes", "instant-nodes", "item-ids" };
-	retract = { "delete-items", "retract-items" };
-	purge = { "purge-nodes" };
-	publish = { "publish", autocreate_on_publish and "auto-create" };
-	delete = { "delete-nodes" };
-	get_items = { "retrieve-items" };
-	add_subscription = { "subscribe" };
-	get_subscriptions = { "retrieve-subscriptions" };
-};
-
-local function add_disco_features_from_service(disco, service)
-	for method, features in pairs(feature_map) do
-		if service[method] then
-			for _, feature in ipairs(features) do
-				if feature then
-					disco:tag("feature", { var = xmlns_pubsub.."#"..feature }):up();
-				end
-			end
-		end
-	end
-	for affiliation in pairs(service.config.capabilities) do
-		if affiliation ~= "none" and affiliation ~= "owner" then
-			disco:tag("feature", { var = xmlns_pubsub.."#"..affiliation.."-affiliation" }):up();
-		end
-	end
-end
-
-local function build_disco_info(service)
-	local disco_info = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" })
-		:tag("identity", { category = "pubsub", type = "service", name = pubsub_disco_name }):up()
-		:tag("feature", { var = "http://jabber.org/protocol/pubsub" }):up();
-	add_disco_features_from_service(disco_info, service);
-	return disco_info;
-end
-
-module:hook("iq-get/host/http://jabber.org/protocol/disco#info:query", function (event)
-	local origin, stanza = event.origin, event.stanza;
-	local node = stanza.tags[1].attr.node;
-	if not node then
-		return origin.send(st.reply(stanza):add_child(disco_info));
-	else
-		local ok, ret = service:get_nodes(stanza.attr.from);
-		if ok and not ret[node] then
-			ok, ret = false, "item-not-found";
-		end
-		if not ok then
-			return origin.send(pubsub_error_reply(stanza, ret));
-		end
-		local reply = st.reply(stanza)
-			:tag("query", { xmlns = "http://jabber.org/protocol/disco#info", node = node })
-				:tag("identity", { category = "pubsub", type = "leaf" });
-		return origin.send(reply);
-	end
-end);
-
-local function handle_disco_items_on_node(event)
-	local stanza, origin = event.stanza, event.origin;
-	local query = stanza.tags[1];
-	local node = query.attr.node;
-	local ok, ret = service:get_items(node, stanza.attr.from);
-	if not ok then
-		return origin.send(pubsub_error_reply(stanza, ret));
-	end
-	
-	local reply = st.reply(stanza)
-		:tag("query", { xmlns = "http://jabber.org/protocol/disco#items", node = node });
-	
-	for id, item in pairs(ret) do
-		reply:tag("item", { jid = module.host, name = id }):up();
-	end
-	
-	return origin.send(reply);
-end
-
-
-module:hook("iq-get/host/http://jabber.org/protocol/disco#items:query", function (event)
-	if event.stanza.tags[1].attr.node then
-		return handle_disco_items_on_node(event);
-	end
-	local ok, ret = service:get_nodes(event.stanza.attr.from);
-	if not ok then
-		event.origin.send(pubsub_error_reply(event.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);
-
-local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
-local function get_affiliation(jid)
-	local bare_jid = jid_bare(jid);
-	if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
-		return admin_aff;
-	end
-end
-
-function set_service(new_service)
-	service = new_service;
-	module.environment.service = service;
-	disco_info = build_disco_info(service);
-end
-
-function module.save()
-	return { service = service };
-end
-
-function module.restore(data)
-	set_service(data.service);
-end
-
-set_service(pubsub.new({
-	capabilities = {
-		none = {
-			create = false;
-			publish = false;
-			retract = false;
-			get_nodes = true;
-			
-			subscribe = true;
-			unsubscribe = true;
-			get_subscription = true;
-			get_subscriptions = true;
-			get_items = true;
-			
-			subscribe_other = false;
-			unsubscribe_other = false;
-			get_subscription_other = false;
-			get_subscriptions_other = false;
-			
-			be_subscribed = true;
-			be_unsubscribed = true;
-			
-			set_affiliation = false;
-		};
-		publisher = {
-			create = false;
-			publish = true;
-			retract = true;
-			get_nodes = true;
-			
-			subscribe = true;
-			unsubscribe = true;
-			get_subscription = true;
-			get_subscriptions = true;
-			get_items = true;
-			
-			subscribe_other = false;
-			unsubscribe_other = false;
-			get_subscription_other = false;
-			get_subscriptions_other = false;
-			
-			be_subscribed = true;
-			be_unsubscribed = true;
-			
-			set_affiliation = false;
-		};
-		owner = {
-			create = true;
-			publish = true;
-			retract = true;
-			delete = true;
-			get_nodes = true;
-			
-			subscribe = true;
-			unsubscribe = true;
-			get_subscription = true;
-			get_subscriptions = true;
-			get_items = true;
-			
-			
-			subscribe_other = true;
-			unsubscribe_other = true;
-			get_subscription_other = true;
-			get_subscriptions_other = true;
-			
-			be_subscribed = true;
-			be_unsubscribed = true;
-			
-			set_affiliation = true;
-		};
-	};
-	
-	autocreate_on_publish = autocreate_on_publish;
-	autocreate_on_subscribe = autocreate_on_subscribe;
-	
-	broadcaster = simple_broadcast;
-	get_affiliation = get_affiliation;
-	
-	normalize_jid = jid_bare;
-}));
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/mod_pubsub/mod_pubsub.lua	Fri May 17 18:33:32 2013 +0200
@@ -0,0 +1,251 @@
+local pubsub = require "util.pubsub";
+local st = require "util.stanza";
+local jid_bare = require "util.jid".bare;
+local usermanager = require "core.usermanager";
+
+local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
+local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";
+local xmlns_pubsub_owner = "http://jabber.org/protocol/pubsub#owner";
+
+local autocreate_on_publish = module:get_option_boolean("autocreate_on_publish", false);
+local autocreate_on_subscribe = module:get_option_boolean("autocreate_on_subscribe", false);
+local pubsub_disco_name = module:get_option("name");
+if type(pubsub_disco_name) ~= "string" then pubsub_disco_name = "Prosody PubSub Service"; end
+
+local service;
+
+local lib_pubsub = module:require "pubsub";
+local handlers = lib_pubsub.handlers;
+local pubsub_error_reply = lib_pubsub.pubsub_error_reply;
+
+function handle_pubsub_iq(event)
+	local origin, stanza = event.origin, event.stanza;
+	local pubsub = stanza.tags[1];
+	local action = pubsub.tags[1];
+	if not action then
+		return origin.send(st.error_reply(stanza, "cancel", "bad-request"));
+	end
+	local handler = handlers[stanza.attr.type.."_"..action.name];
+	if handler then
+		handler(origin, stanza, action, service);
+		return true;
+	end
+end
+
+function simple_broadcast(kind, node, jids, item)
+	if item then
+		item = st.clone(item);
+		item.attr.xmlns = nil; -- Clear the pubsub namespace
+	end
+	local message = st.message({ from = module.host, type = "headline" })
+		:tag("event", { xmlns = xmlns_pubsub_event })
+			:tag(kind, { node = node })
+				:add_child(item);
+	for jid in pairs(jids) do
+		module:log("debug", "Sending notification to %s", jid);
+		message.attr.to = jid;
+		module:send(message);
+	end
+end
+
+module:hook("iq/host/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
+module:hook("iq/host/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
+
+local disco_info;
+
+local feature_map = {
+	create = { "create-nodes", "instant-nodes", "item-ids" };
+	retract = { "delete-items", "retract-items" };
+	purge = { "purge-nodes" };
+	publish = { "publish", autocreate_on_publish and "auto-create" };
+	delete = { "delete-nodes" };
+	get_items = { "retrieve-items" };
+	add_subscription = { "subscribe" };
+	get_subscriptions = { "retrieve-subscriptions" };
+};
+
+local function add_disco_features_from_service(disco, service)
+	for method, features in pairs(feature_map) do
+		if service[method] then
+			for _, feature in ipairs(features) do
+				if feature then
+					disco:tag("feature", { var = xmlns_pubsub.."#"..feature }):up();
+				end
+			end
+		end
+	end
+	for affiliation in pairs(service.config.capabilities) do
+		if affiliation ~= "none" and affiliation ~= "owner" then
+			disco:tag("feature", { var = xmlns_pubsub.."#"..affiliation.."-affiliation" }):up();
+		end
+	end
+end
+
+local function build_disco_info(service)
+	local disco_info = st.stanza("query", { xmlns = "http://jabber.org/protocol/disco#info" })
+		:tag("identity", { category = "pubsub", type = "service", name = pubsub_disco_name }):up()
+		:tag("feature", { var = "http://jabber.org/protocol/pubsub" }):up();
+	add_disco_features_from_service(disco_info, service);
+	return disco_info;
+end
+
+module:hook("iq-get/host/http://jabber.org/protocol/disco#info:query", function (event)
+	local origin, stanza = event.origin, event.stanza;
+	local node = stanza.tags[1].attr.node;
+	if not node then
+		return origin.send(st.reply(stanza):add_child(disco_info));
+	else
+		local ok, ret = service:get_nodes(stanza.attr.from);
+		if ok and not ret[node] then
+			ok, ret = false, "item-not-found";
+		end
+		if not ok then
+			return origin.send(pubsub_error_reply(stanza, ret));
+		end
+		local reply = st.reply(stanza)
+			:tag("query", { xmlns = "http://jabber.org/protocol/disco#info", node = node })
+				:tag("identity", { category = "pubsub", type = "leaf" });
+		return origin.send(reply);
+	end
+end);
+
+local function handle_disco_items_on_node(event)
+	local stanza, origin = event.stanza, event.origin;
+	local query = stanza.tags[1];
+	local node = query.attr.node;
+	local ok, ret = service:get_items(node, stanza.attr.from);
+	if not ok then
+		return origin.send(pubsub_error_reply(stanza, ret));
+	end
+
+	local reply = st.reply(stanza)
+		:tag("query", { xmlns = "http://jabber.org/protocol/disco#items", node = node });
+
+	for id, item in pairs(ret) do
+		reply:tag("item", { jid = module.host, name = id }):up();
+	end
+
+	return origin.send(reply);
+end
+
+
+module:hook("iq-get/host/http://jabber.org/protocol/disco#items:query", function (event)
+	if event.stanza.tags[1].attr.node then
+		return handle_disco_items_on_node(event);
+	end
+	local ok, ret = service:get_nodes(event.stanza.attr.from);
+	if not ok then
+		event.origin.send(pubsub_error_reply(event.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);
+
+local admin_aff = module:get_option_string("default_admin_affiliation", "owner");
+local function get_affiliation(jid)
+	local bare_jid = jid_bare(jid);
+	if bare_jid == module.host or usermanager.is_admin(bare_jid, module.host) then
+		return admin_aff;
+	end
+end
+
+function set_service(new_service)
+	service = new_service;
+	module.environment.service = service;
+	disco_info = build_disco_info(service);
+end
+
+function module.save()
+	return { service = service };
+end
+
+function module.restore(data)
+	set_service(data.service);
+end
+
+set_service(pubsub.new({
+	capabilities = {
+		none = {
+			create = false;
+			publish = false;
+			retract = false;
+			get_nodes = true;
+
+			subscribe = true;
+			unsubscribe = true;
+			get_subscription = true;
+			get_subscriptions = true;
+			get_items = true;
+
+			subscribe_other = false;
+			unsubscribe_other = false;
+			get_subscription_other = false;
+			get_subscriptions_other = false;
+
+			be_subscribed = true;
+			be_unsubscribed = true;
+
+			set_affiliation = false;
+		};
+		publisher = {
+			create = false;
+			publish = true;
+			retract = true;
+			get_nodes = true;
+
+			subscribe = true;
+			unsubscribe = true;
+			get_subscription = true;
+			get_subscriptions = true;
+			get_items = true;
+
+			subscribe_other = false;
+			unsubscribe_other = false;
+			get_subscription_other = false;
+			get_subscriptions_other = false;
+
+			be_subscribed = true;
+			be_unsubscribed = true;
+
+			set_affiliation = false;
+		};
+		owner = {
+			create = true;
+			publish = true;
+			retract = true;
+			delete = true;
+			get_nodes = true;
+
+			subscribe = true;
+			unsubscribe = true;
+			get_subscription = true;
+			get_subscriptions = true;
+			get_items = true;
+
+
+			subscribe_other = true;
+			unsubscribe_other = true;
+			get_subscription_other = true;
+			get_subscriptions_other = true;
+
+			be_subscribed = true;
+			be_unsubscribed = true;
+
+			set_affiliation = true;
+		};
+	};
+
+	autocreate_on_publish = autocreate_on_publish;
+	autocreate_on_subscribe = autocreate_on_subscribe;
+
+	broadcaster = simple_broadcast;
+	get_affiliation = get_affiliation;
+
+	normalize_jid = jid_bare;
+}));
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/mod_pubsub/pubsub.lib.lua	Fri May 17 18:33:32 2013 +0200
@@ -0,0 +1,225 @@
+local st = require "util.stanza";
+local uuid_generate = require "util.uuid".generate;
+
+local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
+local xmlns_pubsub_errors = "http://jabber.org/protocol/pubsub#errors";
+
+local _M = {};
+
+local handlers = {};
+_M.handlers = handlers;
+
+local pubsub_errors = {
+	["conflict"] = { "cancel", "conflict" };
+	["invalid-jid"] = { "modify", "bad-request", nil, "invalid-jid" };
+	["jid-required"] = { "modify", "bad-request", nil, "jid-required" };
+	["nodeid-required"] = { "modify", "bad-request", nil, "nodeid-required" };
+	["item-not-found"] = { "cancel", "item-not-found" };
+	["not-subscribed"] = { "modify", "unexpected-request", nil, "not-subscribed" };
+	["forbidden"] = { "cancel", "forbidden" };
+};
+local 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
+_M.pubsub_error_reply = pubsub_error_reply;
+
+function handlers.get_items(origin, stanza, items, service)
+	local node = items.attr.node;
+	local item = items:get_child("item");
+	local id = item and item.attr.id;
+
+	if not node then
+		return origin.send(pubsub_error_reply(stanza, "nodeid-required"));
+	end
+	local ok, results = service:get_items(node, stanza.attr.from, id);
+	if not ok then
+		return origin.send(pubsub_error_reply(stanza, results));
+	end
+
+	local data = st.stanza("items", { node = node });
+	for _, entry in pairs(results) do
+		data:add_child(entry);
+	end
+	local reply;
+	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.get_subscriptions(origin, stanza, subscriptions, service)
+	local node = subscriptions.attr.node;
+	local ok, ret = service:get_subscriptions(node, stanza.attr.from, stanza.attr.from);
+	if not ok then
+		return origin.send(pubsub_error_reply(stanza, ret));
+	end
+	local reply = st.reply(stanza)
+		:tag("pubsub", { xmlns = xmlns_pubsub })
+			:tag("subscriptions");
+	for _, sub in ipairs(ret) do
+		reply:tag("subscription", { node = sub.node, jid = sub.jid, subscription = 'subscribed' }):up();
+	end
+	return origin.send(reply);
+end
+
+function handlers.set_create(origin, stanza, create, service)
+	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 or ret ~= "conflict";
+		if ok then
+			reply = st.reply(stanza)
+				:tag("pubsub", { xmlns = xmlns_pubsub })
+					:tag("create", { node = node });
+		else
+			reply = pubsub_error_reply(stanza, ret);
+		end
+	end
+	return origin.send(reply);
+end
+
+function handlers.set_delete(origin, stanza, delete, service)
+	local node = delete.attr.node;
+
+	local reply, notifier;
+	if not node then
+		return origin.send(pubsub_error_reply(stanza, "nodeid-required"));
+	end
+	local ok, ret = service:delete(node, stanza.attr.from);
+	if ok then
+		reply = st.reply(stanza);
+	else
+		reply = pubsub_error_reply(stanza, ret);
+	end
+	return origin.send(reply);
+end
+
+function handlers.set_subscribe(origin, stanza, subscribe, service)
+	local node, jid = subscribe.attr.node, subscribe.attr.jid;
+	if not (node and jid) then
+		return origin.send(pubsub_error_reply(stanza, jid and "nodeid-required" or "invalid-jid"));
+	end
+	--[[
+	local options_tag, options = stanza.tags[1]:get_child("options"), nil;
+	if options_tag then
+		options = options_form:data(options_tag.tags[1]);
+	end
+	--]]
+	local options_tag, options; -- FIXME
+	local ok, ret = service:add_subscription(node, stanza.attr.from, jid, options);
+	local reply;
+	if ok then
+		reply = st.reply(stanza)
+			:tag("pubsub", { xmlns = xmlns_pubsub })
+				:tag("subscription", {
+					node = node,
+					jid = jid,
+					subscription = "subscribed"
+				}):up();
+		if options_tag then
+			reply:add_child(options_tag);
+		end
+	else
+		reply = pubsub_error_reply(stanza, ret);
+	end
+	origin.send(reply);
+end
+
+function handlers.set_unsubscribe(origin, stanza, unsubscribe, service)
+	local node, jid = unsubscribe.attr.node, unsubscribe.attr.jid;
+	if not (node and jid) then
+		return origin.send(pubsub_error_reply(stanza, jid and "nodeid-required" or "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, service)
+	local node = publish.attr.node;
+	if not node then
+		return origin.send(pubsub_error_reply(stanza, "nodeid-required"));
+	end
+	local item = publish:get_child("item");
+	local id = (item and item.attr.id);
+	if not id then
+		id = uuid_generate();
+		if item then
+			item.attr.id = id;
+		end
+	end
+	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, service)
+	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
+	if not (node and id) then
+		return origin.send(pubsub_error_reply(stanza, node and "item-not-found" or "nodeid-required"));
+	end
+	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 handlers.set_purge(origin, stanza, purge, service)
+	local node, notify = purge.attr.node, purge.attr.notify;
+	notify = (notify == "1") or (notify == "true");
+	local reply;
+	if not node then
+		return origin.send(pubsub_error_reply(stanza, "nodeid-required"));
+	end
+	local ok, ret = service:purge(node, stanza.attr.from, notify);
+	if ok then
+		reply = st.reply(stanza);
+	else
+		reply = pubsub_error_reply(stanza, ret);
+	end
+	return origin.send(reply);
+end
+
+return _M;