Mercurial > prosody-modules

annotate mod_pubsub_eventsource/mod_pubsub_eventsource.lua @ 4409:44f6537f6427

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mod_invites_adhoc: Fail contact invite if user is not on current host Only the username was being used, and the host of the requester ignored. Luckily this only affects admins of the host. If they want to create an account they can use the other command. If they want to create a contact they should request from their account on this host.
author Matthew Wild <mwild1@gmail.com>
date Thu, 28 Jan 2021 07:04:11 +0000
parents 7dbde05b48a9
children 0329cf8cdecb
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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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1 module:depends("http");
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2 module:depends("pubsub");
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4 local streams = {};
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6 local service = hosts[module.host].modules.pubsub.service;
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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\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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66 module:hook_object_event(service.events, "item-published", handle_update);