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annotate mod_cloud_notify/README.markdown @ 2491:5fbca7de2088

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mod_smacks: Send out more ack requests where needed Under some circumstances it was possible that more than "max_unacked_stanzas" where left in the outgoing stanza queue without forcing an ack. This could happen, when more stanzas entered the queue while the last ack request was still unanswered. Now the test "#queue > max_unacked_stanzas" is done upon receiving an ack as well as when sending out stanzas, which fixes this bug.
author tmolitor <thilo@eightysoft.de>
date Sun, 12 Feb 2017 19:27:50 +0100
parents 2e641ab995b3
children 6ab46ff685d0
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2 labels:
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3 - 'Stage-Beta'
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4 summary: 'XEP-0357: Cloud push notifications'
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5 ---
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7 Introduction
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8 ============
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9
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10 This is an implementation of the server bits of [XEP-0357: Push Notifications].
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11 It allows clients to register an "app server" which is notified about new
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12 messages while the user is offline, disconnected or the session is hibernated
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13 by [mod_smacks].
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14 Implementation of the "app server" is not included[^1].
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16 Details
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17 =======
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18
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19 App servers are notified about offline messages or messages waiting
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20 in the smacks queue.
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21
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22 To cooperate with [mod_smacks] this module consumes some events:
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23 "smacks-ack-delayed", "smacks-hibernation-start" and "smacks-hibernation-end".
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24 These events allow this module to send out notifications for messages received
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25 while the session is hibernated by [mod_smacks] or even when smacks
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26 acknowledgements for messages are delayed by a certain amount of seconds
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27 configurable with the [mod_smacks] setting "smacks_max_ack_delay".
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28
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29 The "smacks_max_ack_delay" setting allows to send out notifications to clients
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30 which aren't already in smacks hibernation state (because the read timeout or
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31 connection close didn't happen already) but also aren't responding to acknowledgement
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32 request in a timely manner, thus allowing conversations to be smoother under such
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33 circumstances.
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35 Configuration
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36 =============
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37
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38 Option Default Description
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39 --------------------------------- --------- ------------------------------------------------------------------
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40 `push_notification_with_body` `false` Whether or not to send the message body to remote pubsub node.
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41 `push_notification_with_sender` `false` Whether or not to send the message sender to remote pubsub node.
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42
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43 There are privacy implications for enabling these options because
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44 plaintext content and metadata will be shared with centralized servers
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45 (the pubsub node) run by arbitrary app developers.
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47 Installation
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48 ============
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50 Same as any other module.
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52 Configuration
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53 =============
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55 Configured in-band by supporting clients.
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56
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57 Compatibility
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58 =============
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59
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60 Should work with 0.9+.
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61
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62 [^1]: The service which is expected to forward notifications to
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63 something like Google Cloud Messaging or Apple Notification Service
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64 [mod_smacks]: //modules.prosody.im/mod_smacks