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mod_muc_eventsource/mod_muc_eventsource.lua @ 5536:96dec7681af8
mod_firewall: Update user marks to store instantly via map store
The original approach was to keep marks in memory only, and persist them at
shutdown. That saves I/O, at the cost of potentially losing marks on an
unclean shutdown.
This change persists marks instantly, which may have some performance overhead
but should be more "correct".
It also splits the marking/unmarking into an event which may be watched or
even fired by other modules.
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 08 Jun 2023 16:20:42 +0100 |
parent | 2897:39485b9bbdd6 |
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module:depends("http"); local nodeprep = require "util.encodings".stringprep.nodeprep; local jid_split = require "util.jid".split; local json = require "util.json"; local streams = {}; function client_closed(response) local node = response._eventsource_node; module:log("debug", "Destroying client for %q", node); streams[node][response] = nil; if next(streams[node]) == nil then streams[node] = nil; end end function serve_stream(event, node) local response = event.response; node = nodeprep(node); if node == nil then return 400; end module:log("debug", "Client subscribed to: %s", node); response.on_destroy = client_closed; response._eventsource_node = node; response.conn:write(table.concat({ "HTTP/1.1 200 OK"; "Content-Type: text/event-stream"; "Access-Control-Allow-Origin: *"; "Access-Control-Allow-Methods: GET"; "Access-Control-Max-Age: 7200"; ""; ""; }, "\r\n")); local clientlist = streams[node]; if not clientlist then clientlist = {}; streams[node] = clientlist; end clientlist[response] = response.conn; return true; end function handle_message(event) local room, stanza = event.room, event.stanza; local node = (jid_split(event.room.jid)); local clientlist = streams[node]; if not clientlist then module:log("debug", "No clients for %q", node); return; end -- Extract body from message local body = event.stanza:get_child_text("body"); if not body then return; end local nick = select(3, jid_split(stanza.attr.from)); -- Encode body and broadcast to eventsource subscribers local json_data = json.encode({ nick = nick; body = body; }); local data = "data: "..json_data:gsub("\n", "\ndata: \n").."\n\n"; for response, conn in pairs(clientlist) do conn:write(data); end end module:provides("http", { name = "eventsource"; route = { ["GET /*"] = serve_stream; }; }); module:hook("muc-broadcast-message", handle_message);