prosody-modules
a53f9989a859
mod_pubsub_eventsource/mod_pubsub_eventsource.lua

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mod_pubsub_eventsource/mod_pubsub_eventsource.lua @ 1106:a53f9989a859

mod_muc_log_http: Have same default for showing presence as mod_muc_log
author Kim Alvefur <zash@zash.se>
date Wed, 10 Jul 2013 13:16:33 +0200
parent 858:28dba9608499
child 1241:2380a5d71448
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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");
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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 "";
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28 "";
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29 }, "\r\n"));
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30
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31 local clientlist = streams[node];
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32 if not clientlist then
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33 clientlist = {};
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34 streams[node] = clientlist;
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35 end
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36 clientlist[response] = response.conn;
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38 return true;
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39 end
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41 function handle_update(event)
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42 module:log("debug", "Item published: %q", event.node);
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43 local node = event.node;
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44 local clientlist = streams[node];
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45 local data = "data: "..tostring(event.item):gsub("\n", "\ndata: \n").."\n\n";
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46 if not clientlist then module:log("debug", "No clients for %q", node); return; end
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47 for response, conn in pairs(clientlist) do
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48 conn:write(data);
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49 end
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50 end
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52 module:provides("http", {
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53 name = "eventsource";
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54 route = {
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55 ["GET /*"] = serve_stream;
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56 };
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57 });
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58
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59 module:hook_object_event(service.events, "item-published", handle_update);