Mercurial > prosody-modules

annotate mod_pubsub_eventsource/mod_pubsub_eventsource.lua @ 5553:67152838afbc

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mod_http_oauth2: Improve error messages for URI properties Since there are separate validation checks for URI properties, including that they should use https, with better and more specific error reporting. Reverts 'luaPattern' to 'pattern' which is not currently supported by util.jsonschema, but allows anything that retrieves the schema over http to validate against it, should they wish to do so.
author Kim Alvefur <zash@zash.se>
date Sat, 17 Jun 2023 18:15:00 +0200
parents 0329cf8cdecb
children
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28dba9608499 mod_pubsub_eventsource: An experimental plugin for allowing non-XMPP subscriptions to pubsub nodes over HTML5's server-sent events (SSE/EventSource) API
Matthew Wild <mwild1@gmail.com>
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1 module:depends("http");
28dba9608499 mod_pubsub_eventsource: An experimental plugin for allowing non-XMPP subscriptions to pubsub nodes over HTML5's server-sent events (SSE/EventSource) API
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2 module:depends("pubsub");
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28dba9608499 mod_pubsub_eventsource: An experimental plugin for allowing non-XMPP subscriptions to pubsub nodes over HTML5's server-sent events (SSE/EventSource) API
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4 local streams = {};
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6 local service = hosts[module.host].modules.pubsub.service;
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28dba9608499 mod_pubsub_eventsource: An experimental plugin for allowing non-XMPP subscriptions to pubsub nodes over HTML5's server-sent events (SSE/EventSource) API
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8 function client_closed(response)
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9 local node = response._eventsource_node;
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10 module:log("debug", "Destroying client for %q", node);
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11 streams[node][response] = nil;
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12 if next(streams[node]) == nil then
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13 streams[node] = nil;
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14 end
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15 end
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17 function serve_stream(event, node)
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18 module:log("debug", "Client subscribed to: %s", node);
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20 local response = event.response;
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21 response.on_destroy = client_closed;
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22 response._eventsource_node = node;
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24 response.conn:write(table.concat({
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25 "HTTP/1.1 200 OK";
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26 "Content-Type: text/event-stream";
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27 "Access-Control-Allow-Origin: *";
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28 "Access-Control-Allow-Methods: GET";
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29 "Access-Control-Max-Age: 7200";
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30 "";
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31 "";
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32 }, "\r\n"));
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34 local clientlist = streams[node];
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35 if not clientlist then
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36 clientlist = {};
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37 streams[node] = clientlist;
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38 end
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39 clientlist[response] = response.conn;
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41 return true;
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42 end
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44 function handle_update(event)
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45 module:log("debug", "Item published: %q", event.node);
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46 local node = event.node;
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47 local clientlist = streams[node];
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48 local item = event.item;
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49 if (item.name == "json" and item.attr.xmlns == "urn:xmpp:json:0") or (item.name == "data" and item.attr.xmlns == "https://prosody.im/protocol/data") then
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50 item = item[1];
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51 end
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52 local data = "data: "..tostring(item):gsub("\n", "\ndata: ").."\n\n";
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53 if not clientlist then module:log("debug", "No clients for %q", node); return; end
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54 for response, conn in pairs(clientlist) do
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55 conn:write(data);
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56 end
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57 end
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59 module:provides("http", {
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60 name = "eventsource";
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61 route = {
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62 ["GET /*"] = serve_stream;
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63 };
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64 });
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65
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66 module:hook_object_event(service.events, "item-published", handle_update);