Mercurial > prosody-modules
annotate mod_pubsub_eventsource/mod_pubsub_eventsource.lua @ 4877:adc6241e5d16
mod_measure_process: Report the enforced limit
The soft limit is what the kernel actually enforces, while the hard
limit is is how far you can change the soft limit without privileges.
Unless the process dynamically adjusts the soft limit, knowing the hard
limit is not as useful as knowing the soft limit.
Reporting the soft limit and the number of in-use FDs allows placing
alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 18 Jan 2022 18:55:20 +0100 |
parents | 0329cf8cdecb |
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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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3 |
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4 local streams = {}; |
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5 |
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6 local service = hosts[module.host].modules.pubsub.service; |
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7 |
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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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16 |
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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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19 |
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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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23 |
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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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Florian Zeitz <florob@babelmonkeys.de>
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31 ""; |
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32 }, "\r\n")); |
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33 |
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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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40 |
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41 return true; |
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42 end |
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43 |
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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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58 |
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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); |