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368 lines
11 KiB
368 lines
11 KiB
local pubsub = require "util.pubsub";
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local jid_bare = require "util.jid".bare;
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local jid_split = require "util.jid".split;
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local set_new = require "util.set".new;
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local st = require "util.stanza";
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local calculate_hash = require "util.caps".calculate_hash;
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local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
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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 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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local services = {};
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local recipients = {};
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local hash_map = {};
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function module.save()
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return { services = services };
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end
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function module.restore(data)
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services = data.services;
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end
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local function subscription_presence(user_bare, recipient)
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local recipient_bare = jid_bare(recipient);
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if (recipient_bare == user_bare) then return true; end
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local username, host = jid_split(user_bare);
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return is_contact_subscribed(username, host, recipient_bare);
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end
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local function get_broadcaster(name)
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local 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 = name, 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 from %s: %s", jid, name, tostring(item));
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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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return simple_broadcast;
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end
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function get_pep_service(name)
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if services[name] then
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return services[name];
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end
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services[name] = 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 = false;
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subscribe = false;
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unsubscribe = false;
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get_subscription = false;
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get_subscriptions = false;
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get_items = false;
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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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subscriber = {
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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 = true;
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autocreate_on_subscribe = true;
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broadcaster = get_broadcaster(name);
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get_affiliation = function (jid)
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if jid_bare(jid) == name then
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return "owner";
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elseif subscription_presence(name, jid) then
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return "subscriber";
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end
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end;
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normalize_jid = jid_bare;
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});
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return services[name];
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end
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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 service_name = stanza.attr.to or origin.username.."@"..origin.host
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local service = get_pep_service(service_name);
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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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module:hook("iq/bare/"..xmlns_pubsub..":pubsub", handle_pubsub_iq);
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module:hook("iq/bare/"..xmlns_pubsub_owner..":pubsub", handle_pubsub_iq);
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module:add_identity("pubsub", "pep", module:get_option_string("name", "Prosody"));
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module:add_feature("http://jabber.org/protocol/pubsub#publish");
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local function get_caps_hash_from_presence(stanza, current)
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local t = stanza.attr.type;
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if not t then
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local child = stanza:get_child("c", "http://jabber.org/protocol/caps");
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if child then
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local attr = child.attr;
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if attr.hash then -- new caps
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if attr.hash == 'sha-1' and attr.node and attr.ver then
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return attr.ver, attr.node.."#"..attr.ver;
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end
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else -- legacy caps
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if attr.node and attr.ver then
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return attr.node.."#"..attr.ver.."#"..(attr.ext or ""), attr.node.."#"..attr.ver;
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end
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end
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end
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return; -- no or bad caps
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elseif t == "unavailable" or t == "error" then
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return;
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end
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return current; -- no caps, could mean caps optimization, so return current
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end
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local function resend_last_item(jid, node, service)
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local ok, items = service:get_items(node, jid);
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if not ok then return; end
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for i, id in ipairs(items) do
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service.config.broadcaster("items", node, { [jid] = true }, items[id]);
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end
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end
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local function update_subscriptions(recipient, service_name, nodes)
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local service = get_pep_service(service_name);
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recipients[service_name] = recipients[service_name] or {};
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nodes = nodes or set_new();
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local old = recipients[service_name][recipient];
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if old and type(old) == table then
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for node in pairs((old - nodes):items()) do
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service:remove_subscription(node, recipient, recipient);
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end
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end
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for node in nodes:items() do
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service:add_subscription(node, recipient, recipient);
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resend_last_item(recipient, node, service);
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end
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recipients[service_name][recipient] = nodes;
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end
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module:hook("presence/bare", function(event)
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-- inbound presence to bare JID recieved
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local origin, stanza = event.origin, event.stanza;
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local user = stanza.attr.to or (origin.username..'@'..origin.host);
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local t = stanza.attr.type;
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local self = not stanza.attr.to;
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local service = get_pep_service(user);
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if not t then -- available presence
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if self or subscription_presence(user, stanza.attr.from) then
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local recipient = stanza.attr.from;
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local current = recipients[user] and recipients[user][recipient];
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local hash, query_node = get_caps_hash_from_presence(stanza, current);
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if current == hash or (current and current == hash_map[hash]) then return; end
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if not hash then
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update_subscriptions(recipient, user);
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else
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recipients[user] = recipients[user] or {};
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if hash_map[hash] then
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update_subscriptions(recipient, user, hash_map[hash]);
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else
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recipients[user][recipient] = hash;
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local from_bare = origin.type == "c2s" and origin.username.."@"..origin.host;
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if self or origin.type ~= "c2s" or (recipients[from_bare] and recipients[from_bare][origin.full_jid]) ~= hash then
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-- COMPAT from ~= stanza.attr.to because OneTeam can't deal with missing from attribute
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origin.send(
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st.stanza("iq", {from=user, to=stanza.attr.from, id="disco", type="get"})
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:tag("query", {xmlns = "http://jabber.org/protocol/disco#info", node = query_node})
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);
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end
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end
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end
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end
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elseif t == "unavailable" then
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update_subscriptions(stanza.attr.from, user);
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elseif not self and t == "unsubscribe" then
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local from = jid_bare(stanza.attr.from);
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local subscriptions = recipients[user];
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if subscriptions then
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for subscriber in pairs(subscriptions) do
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if jid_bare(subscriber) == from then
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update_subscriptions(subscriber, user);
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end
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end
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end
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end
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end, 10);
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module:hook("iq-result/bare/disco", function(event)
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local origin, stanza = event.origin, event.stanza;
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local disco = stanza:get_child("query", "http://jabber.org/protocol/disco#info");
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if not disco then
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return;
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end
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-- Process disco response
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local self = not stanza.attr.to;
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local user = stanza.attr.to or (origin.username..'@'..origin.host);
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local contact = stanza.attr.from;
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local current = recipients[user] and recipients[user][contact];
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if type(current) ~= "string" then return; end -- check if waiting for recipient's response
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local ver = current;
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if not string.find(current, "#") then
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ver = calculate_hash(disco.tags); -- calculate hash
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end
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local notify = set_new();
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for _, feature in pairs(disco.tags) do
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if feature.name == "feature" and feature.attr.var then
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local nfeature = feature.attr.var:match("^(.*)%+notify$");
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if nfeature then notify:add(nfeature); end
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end
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end
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hash_map[ver] = notify; -- update hash map
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if self then
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for jid, item in pairs(origin.roster) do -- for all interested contacts
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if item.subscription == "both" or item.subscription == "from" then
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if not recipients[jid] then recipients[jid] = {}; end
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update_subscriptions(contact, jid, notify);
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end
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end
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end
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update_subscriptions(contact, user, notify);
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end);
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module:hook("account-disco-info-node", function(event)
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local reply, stanza, origin = event.reply, event.stanza, event.origin;
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local service_name = stanza.attr.to or origin.username.."@"..origin.host
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local service = get_pep_service(service_name);
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local node = event.node;
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local ok = service:get_items(node, jid_bare(stanza.attr.from) or true);
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if not ok then return; end
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event.exists = true;
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reply:tag('identity', {category='pubsub', type='leaf'}):up();
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end);
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module:hook("account-disco-info", function(event)
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local reply = event.reply;
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reply:tag('identity', {category='pubsub', type='pep'}):up();
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reply:tag('feature', {var='http://jabber.org/protocol/pubsub#publish'}):up();
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end);
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module:hook("account-disco-items-node", function(event)
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local reply, stanza, origin = event.reply, event.stanza, event.origin;
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local node = event.node;
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local service_name = stanza.attr.to or origin.username.."@"..origin.host
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local service = get_pep_service(service_name);
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local ok, ret = service:get_items(node, jid_bare(stanza.attr.from) or true);
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if not ok then return; end
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event.exists = true;
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for _, id in ipairs(ret) do
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reply:tag("item", { jid = service_name, name = id }):up();
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end
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end);
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module:hook("account-disco-items", function(event)
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local reply, stanza, origin = event.reply, event.stanza, event.origin;
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local service_name = reply.attr.from or origin.username.."@"..origin.host
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local service = get_pep_service(service_name);
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local ok, ret = service:get_nodes(jid_bare(stanza.attr.from));
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if not ok then return; end
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for node, node_obj in pairs(ret) do
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reply:tag("item", { jid = service_name, node = node, name = node_obj.config.name }):up();
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end
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end);
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