Software / code / prosody-modules
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mod_smacks/README.markdown @ 2494:d300ae5dba87
mod_smacks: Fix some bugs with smacks-ack-delayed event triggering.
The old code had several flaws which are addressed here.
First of all this fixes the if statement guarding the event generation
There where some timing glitches addressed by this commit as well.
| author | tmolitor <thilo@eightysoft.de> |
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| date | Sun, 12 Feb 2017 21:23:22 +0100 |
| parent | 2394:4c27ebcf4cbd |
| child | 2503:7036a6e074d7 |
| rev | line source |
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1 --- |
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2 labels: |
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3 - 'Stage-Alpha' |
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4 summary: 'XEP-0198: Reliability and fast reconnects for XMPP' |
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5 ... |
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7 Introduction |
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8 ============ |
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10 By default XMPP is as reliable as your network is. Unfortunately in some |
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11 cases that is not very reliable - in some network conditions disconnects |
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12 can be frequent and message loss can occur. |
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14 To overcome this, XMPP has an optional extension (XEP-0198: Stream |
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15 Management) which, when supported by both the client and server, can |
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16 allow a client to resume a disconnected session, and prevent message |
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17 loss. |
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19 Details |
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20 ======= |
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22 When using XEP-0198 both the client and the server keep a queue of the |
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23 most recently sent stanzas - this is cleared when the other end |
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24 acknowledges they have received the stanzas. If the client disconnects, |
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25 instead of marking the user offline the server pretends the client is |
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26 still online for a short (configurable) period of time. If the client |
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27 reconnects within this period, any stanzas in the queue that the client |
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28 did not receive are re-sent. |
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30 If the client fails to reconnect before the timeout then it is marked |
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31 offline as normal, and any stanzas in the queue are returned to the |
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32 sender as a "recipient-unavailable" error. |
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33 |
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34 If you don't want this behaviour on timeout you can use [mod_smacks_offline] |
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35 or [mod_smacks_noerror] to customize the behaviour further. |
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36 |
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37 This module also provides some events used by [mod_cloud_notify]. |
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38 These events are: "smacks-ack-delayed", "smacks-hibernation-start" and |
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39 "smacks-hibernation-end". See [mod_cloud_notify] for details on how this |
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40 events are used there. |
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41 |
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42 Configuration |
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43 ============= |
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45 Option Default Description |
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46 ------------------------------ ----------------- ----------------------------------------------------------------------------------------- |
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47 `smacks_hibernation_time` 300 (5 minutes) The number of seconds a disconnected session should stay alive for (to allow reconnect) |
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48 `smacks_enabled_s2s` false Enable Stream Management on server connections? *Experimental* |
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49 `smacks_max_unacked_stanzas` 0 How many stanzas to send before requesting acknowledgement |
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50 `smacks_max_ack_delay` 60 (1 minute) The number of seconds an ack must be unanswered to trigger an "smacks-ack-delayed" event |
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51 |
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52 Compatibility |
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53 ============= |
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55 ----- ----------------------------------- |
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56 0.10 Works |
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57 0.9 Works |
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58 0.8 Works, use version [7693724881b3] |
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59 ----- ----------------------------------- |
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60 |
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62 Clients |
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63 ======= |
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64 |
| 1782 | 65 Clients that support XEP-0198: |
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67 - Gajim |
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68 - Swift (but not resumption, as of version 2.0 and alphas of 3.0) |
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69 - Psi (in an unreleased branch) |
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70 - Conversations |
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71 - Yaxim |
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72 |
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73 [7693724881b3]: //hg.prosody.im/prosody-modules/raw-file/7693724881b3/mod_smacks/mod_smacks.lua |
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74 [mod_smacks_offline]: //modules.prosody.im/mod_smacks_offline |
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75 [mod_smacks_noerror]: //modules.prosody.im/mod_smacks_noerror |
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76 [mod_cloud_notify]: //modules.prosody.im/mod_cloud_notify |
