-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local jid_bare = require "util.jid".bare; local jid_split = require "util.jid".split; local st = require "util.stanza"; local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed; local pairs = pairs; local next = next; local type = type; local calculate_hash = require "util.caps".calculate_hash; local core_post_stanza = prosody.core_post_stanza; local bare_sessions = prosody.bare_sessions; -- Used as canonical 'empty table' local NULL = {}; -- data[user_bare_jid][node] = item_stanza local data = {}; --- recipients[user_bare_jid][contact_full_jid][subscribed_node] = true local recipients = {}; -- hash_map[hash][subscribed_nodes] = true local hash_map = {}; module.save = function() return { data = data, recipients = recipients, hash_map = hash_map }; end module.restore = function(state) data = state.data or {}; recipients = state.recipients or {}; hash_map = state.hash_map or {}; end module:add_identity("pubsub", "pep", module:get_option_string("name", "Prosody")); module:add_feature("http://jabber.org/protocol/pubsub#publish"); local function subscription_presence(user_bare, recipient) local recipient_bare = jid_bare(recipient); if (recipient_bare == user_bare) then return true end local username, host = jid_split(user_bare); return is_contact_subscribed(username, host, recipient_bare); end module:hook("pep-publish-item", function (event) local session, bare, node, id, item = event.session, event.user, event.node, event.id, event.item; item.attr.xmlns = nil; local disable = #item.tags ~= 1 or #item.tags[1] == 0; if #item.tags == 0 then item.name = "retract"; end local stanza = st.message({from=bare, type='headline'}) :tag('event', {xmlns='http://jabber.org/protocol/pubsub#event'}) :tag('items', {node=node}) :add_child(item) :up() :up(); -- store for the future local user_data = data[bare]; if disable then if user_data then user_data[node] = nil; if not next(user_data) then data[bare] = nil; end end else if not user_data then user_data = {}; data[bare] = user_data; end user_data[node] = {id, item}; end -- broadcast for recipient, notify in pairs(recipients[bare] or NULL) do if notify[node] then stanza.attr.to = recipient; core_post_stanza(session, stanza); end end end); local function publish_all(user, recipient, session) local d = data[user]; local notify = recipients[user] and recipients[user][recipient]; if d and notify then for node in pairs(notify) do if d[node] then local id, item = unpack(d[node]); session.send(st.message({from=user, to=recipient, type='headline'}) :tag('event', {xmlns='http://jabber.org/protocol/pubsub#event'}) :tag('items', {node=node}) :add_child(item) :up() :up()); end end end end local function get_caps_hash_from_presence(stanza, current) local t = stanza.attr.type; if not t then for _, child in pairs(stanza.tags) do if child.name == "c" and child.attr.xmlns == "http://jabber.org/protocol/caps" then local attr = child.attr; if attr.hash then -- new caps if attr.hash == 'sha-1' and attr.node and attr.ver then return attr.ver, attr.node.."#"..attr.ver; end else -- legacy caps if attr.node and attr.ver then return attr.node.."#"..attr.ver.."#"..(attr.ext or ""), attr.node.."#"..attr.ver; end end return; -- bad caps format end end elseif t == "unavailable" or t == "error" then return; end return current; -- no caps, could mean caps optimization, so return current end module:hook("presence/bare", function(event) -- inbound presence to bare JID recieved local origin, stanza = event.origin, event.stanza; local user = stanza.attr.to or (origin.username..'@'..origin.host); local t = stanza.attr.type; local self = not stanza.attr.to; -- Only cache subscriptions if user is online if not bare_sessions[user] then return; end if not t then -- available presence if self or subscription_presence(user, stanza.attr.from) then local recipient = stanza.attr.from; local current = recipients[user] and recipients[user][recipient]; local hash = get_caps_hash_from_presence(stanza, current); if current == hash or (current and current == hash_map[hash]) then return; end if not hash then if recipients[user] then recipients[user][recipient] = nil; end else recipients[user] = recipients[user] or {}; if hash_map[hash] then recipients[user][recipient] = hash_map[hash]; publish_all(user, recipient, origin); else recipients[user][recipient] = hash; local from_bare = origin.type == "c2s" and origin.username.."@"..origin.host; if self or origin.type ~= "c2s" or (recipients[from_bare] and recipients[from_bare][origin.full_jid]) ~= hash then -- COMPAT from ~= stanza.attr.to because OneTeam and Asterisk 1.8 can't deal with missing from attribute origin.send( st.stanza("iq", {from=user, to=stanza.attr.from, id="disco", type="get"}) :query("http://jabber.org/protocol/disco#info") ); end end end end elseif t == "unavailable" then if recipients[user] then recipients[user][stanza.attr.from] = nil; end elseif not self and t == "unsubscribe" then local from = jid_bare(stanza.attr.from); local subscriptions = recipients[user]; if subscriptions then for subscriber in pairs(subscriptions) do if jid_bare(subscriber) == from then recipients[user][subscriber] = nil; end end end end end, 10); module:hook("iq/bare/http://jabber.org/protocol/pubsub:pubsub", function(event) local session, stanza = event.origin, event.stanza; local payload = stanza.tags[1]; if stanza.attr.type == 'set' and (not stanza.attr.to or jid_bare(stanza.attr.from) == stanza.attr.to) then payload = payload.tags[1]; if payload and (payload.name == 'publish' or payload.name == 'retract') and payload.attr.node then -- <publish node='http://jabber.org/protocol/tune'> local node = payload.attr.node; payload = payload.tags[1]; if payload and payload.name == "item" then -- <item> local id = payload.attr.id or "1"; payload.attr.id = id; session.send(st.reply(stanza)); module:fire_event("pep-publish-item", { node = node, user = jid_bare(session.full_jid), actor = session.jid, id = id, session = session, item = st.clone(payload); }); return true; else module:log("debug", "Payload is missing the <item>", node); end else module:log("debug", "Unhandled payload: %s", payload and payload:top_tag() or "(no payload)"); end elseif stanza.attr.type == 'get' then local user = stanza.attr.to and jid_bare(stanza.attr.to) or session.username..'@'..session.host; if subscription_presence(user, stanza.attr.from) then local user_data = data[user]; local node, requested_id; payload = payload.tags[1]; if payload and payload.name == 'items' then node = payload.attr.node; local item = payload.tags[1]; if item and item.name == "item" then requested_id = item.attr.id; end end if node and user_data and user_data[node] then -- Send the last item local id, item = unpack(user_data[node]); if not requested_id or id == requested_id then local stanza = st.reply(stanza) :tag('pubsub', {xmlns='http://jabber.org/protocol/pubsub'}) :tag('items', {node=node}) :add_child(item) :up() :up(); session.send(stanza); return true; else -- requested item doesn't exist local stanza = st.reply(stanza) :tag('pubsub', {xmlns='http://jabber.org/protocol/pubsub'}) :tag('items', {node=node}) :up(); session.send(stanza); return true; end elseif node then -- node doesn't exist session.send(st.error_reply(stanza, 'cancel', 'item-not-found')); module:log("debug", "Item '%s' not found", node) return true; else --invalid request session.send(st.error_reply(stanza, 'modify', 'bad-request')); module:log("debug", "Invalid request: %s", tostring(payload)); return true; end else --no presence subscription session.send(st.error_reply(stanza, 'auth', 'not-authorized') :tag('presence-subscription-required', {xmlns='http://jabber.org/protocol/pubsub#errors'})); module:log("debug", "Unauthorized request: %s", tostring(payload)); return true; end end end); module:hook("iq-result/bare/disco", function(event) local session, stanza = event.origin, event.stanza; if stanza.attr.type == "result" then local disco = stanza.tags[1]; if disco and disco.name == "query" and disco.attr.xmlns == "http://jabber.org/protocol/disco#info" then -- Process disco response local self = not stanza.attr.to; local user = stanza.attr.to or (session.username..'@'..session.host); local contact = stanza.attr.from; local current = recipients[user] and recipients[user][contact]; if type(current) ~= "string" then return; end -- check if waiting for recipient's response local ver = current; if not string.find(current, "#") then ver = calculate_hash(disco.tags); -- calculate hash end local notify = {}; for _, feature in pairs(disco.tags) do if feature.name == "feature" and feature.attr.var then local nfeature = feature.attr.var:match("^(.*)%+notify$"); if nfeature then notify[nfeature] = true; end end end hash_map[ver] = notify; -- update hash map if self then for jid, item in pairs(session.roster) do -- for all interested contacts if item.subscription == "both" or item.subscription == "from" then if not recipients[jid] then recipients[jid] = {}; end recipients[jid][contact] = notify; publish_all(jid, contact, session); end end end recipients[user][contact] = notify; -- set recipient's data to calculated data -- send messages to recipient publish_all(user, contact, session); end end end); module:hook("account-disco-info", function(event) local reply = event.reply; reply:tag('identity', {category='pubsub', type='pep'}):up(); reply:tag('feature', {var='http://jabber.org/protocol/pubsub#publish'}):up(); end); module:hook("account-disco-items", function(event) local reply = event.reply; local bare = reply.attr.to; local user_data = data[bare]; if user_data then for node, _ in pairs(user_data) do reply:tag('item', {jid=bare, node=node}):up(); end end end); module:hook("account-disco-info-node", function (event) local session, stanza, node = event.origin, event.stanza, event.node; local user = stanza.attr.to; local user_data = data[user]; if user_data and user_data[node] then event.exists = true; event.reply:tag('identity', {category='pubsub', type='leaf'}):up(); end end); module:hook("resource-unbind", function (event) local user_bare_jid = event.session.username.."@"..event.session.host; if not bare_sessions[user_bare_jid] then -- User went offline -- We don't need this info cached anymore, clear it. recipients[user_bare_jid] = nil; end end);