Mercurial > prosody-modules

annotate mod_muc_eventsource/mod_muc_eventsource.lua @ 4730:1da4b815d2fe

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mod_cloud_notify: Identify (and immediately push) urgent stanzas, e.g. calls This covers the following things: - A session that appears online, but has a broken TCP connection - Clients such as Siskin and Snikket iOS that require a push for calls to work It allows the stanza to be pushed immediately instead of waiting for the session to hibernate or an ack to timeout. It shouldn't break any existing cases.
author Matthew Wild <mwild1@gmail.com>
date Wed, 27 Oct 2021 19:12:03 +0100
parents 39485b9bbdd6
children
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1 module:depends("http");
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2 local nodeprep = require "util.encodings".stringprep.nodeprep;
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4 local jid_split = require "util.jid".split;
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5 local json = require "util.json";
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7 local streams = {};
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9 function client_closed(response)
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10 local node = response._eventsource_node;
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11 module:log("debug", "Destroying client for %q", node);
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12 streams[node][response] = nil;
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13 if next(streams[node]) == nil then
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14 streams[node] = nil;
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15 end
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16 end
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18 function serve_stream(event, node)
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19 local response = event.response;
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20
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21 node = nodeprep(node);
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22 if node == nil then
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23 return 400;
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24 end
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25
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26 module:log("debug", "Client subscribed to: %s", node);
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28 response.on_destroy = client_closed;
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29 response._eventsource_node = node;
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31 response.conn:write(table.concat({
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32 "HTTP/1.1 200 OK";
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33 "Content-Type: text/event-stream";
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34 "Access-Control-Allow-Origin: *";
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35 "Access-Control-Allow-Methods: GET";
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36 "Access-Control-Max-Age: 7200";
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37 "";
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38 "";
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39 }, "\r\n"));
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41 local clientlist = streams[node];
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42 if not clientlist then
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43 clientlist = {};
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44 streams[node] = clientlist;
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45 end
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46 clientlist[response] = response.conn;
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47
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48 return true;
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49 end
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51 function handle_message(event)
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52 local room, stanza = event.room, event.stanza;
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53 local node = (jid_split(event.room.jid));
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54 local clientlist = streams[node];
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55 if not clientlist then module:log("debug", "No clients for %q", node); return; end
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56
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57 -- Extract body from message
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58 local body = event.stanza:get_child_text("body");
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59 if not body then
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60 return;
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61 end
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62 local nick = select(3, jid_split(stanza.attr.from));
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63 -- Encode body and broadcast to eventsource subscribers
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64 local json_data = json.encode({
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65 nick = nick;
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66 body = body;
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67 });
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68 local data = "data: "..json_data:gsub("\n", "\ndata: \n").."\n\n";
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69 for response, conn in pairs(clientlist) do
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70 conn:write(data);
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71 end
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72 end
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74 module:provides("http", {
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75 name = "eventsource";
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76 route = {
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77 ["GET /*"] = serve_stream;
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78 };
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79 });
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82 module:hook("muc-broadcast-message", handle_message);