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mod_muc_eventsource/README.markdown

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various/README: Fix 'labels' metadata, should be a list
author Kim Alvefur <zash@zash.se>
date Sun, 05 May 2024 17:37:38 +0200
parent 2883:7c16afc70d11
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1 ---
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2 labels:
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3 - Stage-Beta
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4 summary: Subscribe to MUC rooms using the HTML5 EventSource API
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5 ...
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6
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7 Introduction
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8 ------------
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10 This module and its docs shamelessly forked from mod_pubsub_eventsource.
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12 [Server-Sent Events](https://en.wikipedia.org/wiki/Server-sent_events)
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13 is a simple HTTP/line-based protocol supported in HTML5, making it easy
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14 to receive a stream of "events" in realtime using the Javascript
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15 [EventSource
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16 API](https://developer.mozilla.org/en-US/docs/Web/API/EventSource).
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18 EventSource is supported in [most modern
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19 browsers](http://caniuse.com/#feat=eventsource), and for the remainder
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20 there are 'polyfill' compatibility layers such as
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21 [EventSource.js](https://github.com/remy/polyfills/blob/master/EventSource.js)
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22 and [jquery.eventsource](https://github.com/rwldrn/jquery.eventsource).
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23
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24 Details
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25 -------
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27 Subscribing to a node from Javascript is easy:
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29 var source = new EventSource('http://muc.example.org:5280/eventsource/myroom');
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30 source.onmessage = function (event) {
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31 console.log(event.data); // Do whatever you want with the data here
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32 };
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34 ### Access control
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36 Be warned that this module currently performs no access control. It will expose
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37 the messages of ALL rooms on the host it is loaded on. This may be changed in
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38 future revisions.
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40 ### Cross-domain issues
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42 The same cross-domain restrictions apply to EventSource that apply to
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43 BOSH, and support for CORS is not clearly standardized yet. You may want
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44 to proxy connections through your web server for this reason. See [BOSH:
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45 Cross-domain
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46 issues](https://prosody.im/doc/setting_up_bosh#proxying_requests) for
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47 more information.
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48
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49 Configuration
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50 -------------
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51
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52 There is no special configuration for this module. Simply load it onto a
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53 MUC component like so:
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55 Component "muc.example.org" "muc"
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56 modules_enabled = { "muc_eventsource" }
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57
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58 As it uses HTTP to serve the event streams, you can use Prosody's
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59 standard [HTTP configuration options](https://prosody.im/doc/http) to
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60 control how/where the streams are served.
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61
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62 **Note about URLs:** It is important to get the event streams from the
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63 correct hostname (that of the MUC host). An example stream URL is
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64 `http://muc.example.org:5280/eventsource/myroom`. If you need to
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65 access the streams using another hostname (e.g. `example.org`) you can
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66 use the `http_host` option under the Component, e.g.
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67 `http_host = "example.org"`. For more information see the ['Virtual
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68 Hosts'](https://prosody.im/doc/http#virtual_hosts) section of our HTTP
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69 documentation.
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70
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71 Compatibility
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72 -------------
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73
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75 0.10 ?
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76 0.9 ?
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77 0.8 Doesn't work
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78 Trunk Works
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79 ------- --------------