Mercurial > prosody-modules

annotate mod_muc_eventsource/mod_muc_eventsource.lua @ 5648:c217f4edfc4f

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misc/mtail: Start of an mtail config Stashing it here in case anyone wants to continue working on it. Currently it's only counting log messages by level. Due to the permissions set by systemd on Prosody logs, mtail never managed to start correctly until permissions were manually relaxed.
author Kim Alvefur <zash@zash.se>
date Sun, 17 Sep 2023 13:36:30 +0200
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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50
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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);