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mod_csi_battery_saver: Fix #921 See also https://mail.jabber.org/pipermail/standards/2017-May/032773.html
author tmolitor <thilo@eightysoft.de>
date Sun, 27 Aug 2017 21:35:08 +0200
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children e6f91e00b507
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1 ---
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2 labels:
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3 - 'Stage-Beta'
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4 summary: Delegate roster management to an external service
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5 ...
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6
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7 *NOTE: THIS MODULE IS RELEASED UNDER THE MOZILLA PUBLIC LICENSE VERSION 2.*
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8
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9 Normally the XMPP server will store and maintain the users' contact
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10 rosters. This module lets you delegate roster management to an external
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11 service.
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12
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13 Prosody will make an HTTP request to fetch the roster from the external
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14 service. The service will need to notify Prosody whenever a user's roster
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15 changes, so that Prosody can fetch a new roster for that user.
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16
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17 ## Configuring this module
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18
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19 This module relies on `mod_storage_memory` and `mod_block_subscriptions`.
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20
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21 In `.parts/prosody/etc/prosody/prosody.cfg.lua`, where your particular
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22 `VirtualHost` is being configured, add the following:
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23
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24 modules_enabled = {
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25 "http_roster_admin",
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26 "block_subscriptions",
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27 "storage_memory",
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28 "http_files"
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29 }
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30 modules_disabled = {
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31 -- Prosody will get the roster from the backend app,
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32 -- so we disable the default roster module.
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33 "roster"
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34 }
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35 storage = { roster = "memory" }
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36 http_roster_url = "http://localhost/contacts/%s" -- %s will be replaced by an URL-encoded username
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37
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38 The `http_roster_url` parameter needs to be configured to point to the
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39 URL in the backend application which returns users' contacts rosters.
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40
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41 In this URL, the pattern `%s` is replaced by an URL-encoded username.
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42
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43 When the user *john* then connects to Prosody, and `http_roster_url` is
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44 set to “http://app.example.org/contacts/%s”, then Prosody will make a
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45 GET request to http://app.example.org/contacts/john
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46
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47 ## Notifying Prosody of roster changes
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48
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49 The external service needs to notify Prosody whenever a user's roster
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50 changes. To do this, it must make an HTTP POST request to either:
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51
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52 - http://localhost:5280/roster_admin/refresh
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53 - https://localhost:5281/roster_admin/refresh
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54
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55 Make sure that the "http_files" module is enabled in Prosody's configuration,
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56 for the above URLs to served.
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57
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58 Ports 5280/5281 can be firewalled and the web server (i.e. Apache or Nginx)
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59 can be configured to reverse proxy those URLs to for example
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60 https://example.org/http-bind.
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61
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62 The contents of the POST should be a JSON encoded array of usernames whose
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63 rosters have changed.
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64
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65 For example, if user ‘john’ became friends with ‘aaron’, both john’s
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66 contact list and aaron’s contact lists have changed:
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67
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68 ["john", "aaron"]
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69
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70 When the operation is complete Prosody will reply with a summary of the
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71 operation - a JSON object containing:
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72
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73 - **status**: either “ok” (success) or “error” (operation completely failed)
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74 - **message**: A human-readable message (for logging and debugging purposes)
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75 - **updated**: The number of rosters successfully updated
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76 - **errors**: The number of rosters that failed to update
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77
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78 Example:
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79
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80 {
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81 "status": "ok",
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82 "message": "roster update complete",
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83 "updated": 2,
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84 "errors": 0
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85 }
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86
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87 Prosody may also return status codes `400` or `500` in case of errors (such
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88 as a missing/malformed body).