Mercurial > prosody-modules
view mod_pubsub_mqtt/mod_pubsub_mqtt.lua @ 5715:8488ebde5739
mod_http_oauth2: Skip consent screen if requested by client and same scopes already granted
This follows the intent behind the OpenID Connect 'prompt' parameter
when it does not include the 'consent' keyword, that is the client
wishes to skip the consent screen. If the user has already granted the
exact same scopes to the exact same client in the past, then one can
assume that they may grant it again.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Tue, 14 Nov 2023 23:03:37 +0100 |
parents | 85a7304cfea1 |
children |
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module:set_global(); local mqtt = module:require "mqtt"; local id = require "util.id"; local st = require "util.stanza"; local function tostring_content(item) return tostring(item[1]); end local data_translators = setmetatable({ utf8 = { from_item = function (item) return item:find("{https://prosody.im/protocol/data}data#"); end; to_item = function (payload) return st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = id.medium() }) :text_tag("data", payload, { xmlns = "https://prosody.im/protocol/data" }) end; }; json = { from_item = function (item) return item:find("{urn:xmpp:json:0}json#"); end; to_item = function (payload) return st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = id.medium() }) :text_tag("json", payload, { xmlns = "urn:xmpp:json:0" }); end; }; atom_title = { from_item = function (item) return item:find("{http://www.w3.org/2005/Atom}entry/title#"); end; to_item = function (payload) return st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = id.medium() }) :tag("entry", { xmlns = "http://www.w3.org/2005/Atom" }) :text_tag("title", payload, { type = "text" }); end; }; }, { __index = function () return { from_item = tostring }; end; }); local pubsub_services = {}; local pubsub_subscribers = {}; local packet_handlers = {}; function handle_packet(session, packet) module:log("debug", "MQTT packet received! Length: %d", packet.length); for k,v in pairs(packet) do module:log("debug", "MQTT %s: %s", tostring(k), tostring(v)); end local handler = packet_handlers[packet.type]; if not handler then module:log("warn", "Unhandled command: %s", tostring(packet.type)); return; end handler(session, packet); end function packet_handlers.connect(session, packet) session.conn:write(mqtt.serialize_packet{ type = "connack"; data = string.char(0x00, 0x00); }); end function packet_handlers.disconnect(session, packet) session.conn:close(); end function packet_handlers.publish(session, packet) module:log("info", "PUBLISH to %s", packet.topic); local host, payload_type, node = packet.topic:match("^([^/]+)/([^/]+)/(.+)$"); if not host then module:log("warn", "Invalid topic format - expected: HOST/TYPE/NODE"); return; end local pubsub = pubsub_services[host]; if not pubsub then module:log("warn", "Unable to locate host/node: %s", packet.topic); return; end local payload_translator = data_translators[payload_type]; if not payload_translator or not payload_translator.to_item then module:log("warn", "Unsupported payload type '%s' on topic '%s'", payload_type, packet.topic); return; end local payload_item = payload_translator.to_item(packet.data); local ok, err = pubsub:publish(node, true, payload_item.attr.id, payload_item); if not ok then module:log("warn", "Error publishing MQTT data: %s", tostring(err)); end end function packet_handlers.subscribe(session, packet) for _, topic in ipairs(packet.topics) do module:log("info", "SUBSCRIBE to %s", topic); local host, payload_type, node = topic:match("^([^/]+)/([^/]+)/(.+)$"); if not host then module:log("warn", "Invalid topic format - expected: HOST/TYPE/NODE"); return; end local pubsub = pubsub_subscribers[host]; if not pubsub then module:log("warn", "Unable to locate host/node: %s", topic); return; end local node_subs = pubsub[node]; if not node_subs then node_subs = {}; pubsub[node] = node_subs; end session.subscriptions[topic] = payload_type; node_subs[session] = payload_type; end end function packet_handlers.pingreq(session, packet) session.conn:write(mqtt.serialize_packet{type = "pingresp"}); end local sessions = {}; local mqtt_listener = {}; function mqtt_listener.onconnect(conn) sessions[conn] = { conn = conn; stream = mqtt.new_stream(); subscriptions = {}; }; end function mqtt_listener.onincoming(conn, data) local session = sessions[conn]; if session then local packets = session.stream:feed(data); for i = 1, #packets do handle_packet(session, packets[i]); end end end function mqtt_listener.ondisconnect(conn) local session = sessions[conn]; for topic in pairs(session.subscriptions) do local host, node = topic:match("^([^/]+)/(.+)$"); local subs = pubsub_subscribers[host]; if subs then local node_subs = subs[node]; if node_subs then node_subs[session] = nil; end end end sessions[conn] = nil; module:log("debug", "MQTT client disconnected"); end module:provides("net", { default_port = 1883; listener = mqtt_listener; }); function module.add_host(module) local pubsub_module = hosts[module.host].modules.pubsub if pubsub_module then module:log("debug", "MQTT enabled for %s", module.host); module:depends("pubsub"); pubsub_services[module.host] = assert(pubsub_module.service); local subscribers = {}; pubsub_subscribers[module.host] = subscribers; local function handle_publish(event) -- Build MQTT packet local packet_types = setmetatable({}, { __index = function (self, payload_type) local packet = mqtt.serialize_packet{ type = "publish"; id = "\000\000"; topic = module.host.."/"..payload_type.."/"..event.node; data = data_translators[payload_type].from_item(event.item) or ""; }; rawset(self, packet); return packet; end; }); -- Broadcast to subscribers module:log("debug", "Broadcasting PUBLISH to subscribers of %s/*/%s", module.host, event.node); for session, payload_type in pairs(subscribers[event.node] or {}) do session.conn:write(packet_types[payload_type]); module:log("debug", "Sent to %s", tostring(session)); end end pubsub_services[module.host].events.add_handler("item-published", handle_publish); function module.unload() module:log("debug", "MQTT disabled for %s", module.host); pubsub_module.service.remove_handler("item-published", handle_publish); pubsub_services[module.host] = nil; pubsub_subscribers[module.host] = nil; end end end