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mod_storage_appendmap: Successfully return nothing on ENOENT
author Kim Alvefur <zash@zash.se>
date Tue, 21 Mar 2017 15:56:43 +0100
parents 4d81d7219db0
children df86ce6bb0b4
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1 ---
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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, messages stored by [mod_mam]
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20 or messages waiting in the smacks queue.
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21 The business rules outlined [here] are all honored[^2].
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22
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23 To cooperate with [mod_smacks] this module consumes some events:
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24 "smacks-ack-delayed", "smacks-hibernation-start" and "smacks-hibernation-end".
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25 These events allow this module to send out notifications for messages received
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26 while the session is hibernated by [mod_smacks] or even when smacks
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27 acknowledgements for messages are delayed by a certain amount of seconds
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28 configurable with the [mod_smacks] setting "smacks_max_ack_delay".
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29
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30 The "smacks_max_ack_delay" setting allows to send out notifications to clients
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31 which aren't already in smacks hibernation state (because the read timeout or
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32 connection close didn't happen already) but also aren't responding to acknowledgement
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33 request in a timely manner, thus allowing conversations to be smoother under such
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34 circumstances.
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36 The new event "cloud-notify-ping" can be used by any module to send out a cloud
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37 notification to either all registered endpoints for the given user or only the endpoints
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38 given in the event data.
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39
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40 Configuration
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41 =============
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42
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43 Option Default Description
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44 --------------------------------- --------- ------------------------------------------------------------------
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45 `push_notification_with_body` `false` Whether or not to send the message body to remote pubsub node.
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46 `push_notification_with_sender` `false` Whether or not to send the message sender to remote pubsub node.
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47
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48 There are privacy implications for enabling these options because
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49 plaintext content and metadata will be shared with centralized servers
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50 (the pubsub node) run by arbitrary app developers.
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51
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52 Installation
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53 ============
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55 Same as any other module.
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56
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57 Configuration
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58 =============
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60 Configured in-band by supporting clients.
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61
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62 Compatibility
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63 =============
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64
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65 Should work with 0.9+.
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66
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67 [^1]: The service which is expected to forward notifications to
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68 something like Google Cloud Messaging or Apple Notification Service
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69 [here]: https://mail.jabber.org/pipermail/standards/2016-February/030925.html
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70 [^2]: //hg.prosody.im/prosody-modules/file/tip/mod_cloud_notify/business_rules.markdown