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quick frontend (app): avoid crash when a listener is removed while being called
author Goffi <goffi@goffi.org>
date Fri, 28 Feb 2020 10:06:38 +0100
parents 72583524cfd3
children
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1 =======================
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2 ad-hoc: Ad-Hoc commands
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3 =======================
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4
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5 Ad-Hoc commands is a generic mechanism of XMPP to control an entity. They can be used
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6 either by humans, or automated. Ad-Hoc commands can be used for administration (e.g. get
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7 list of connected users, send a service announcement, restart parts of the server), or
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8 execute about anything (e.g. control a physical robot with XMPP).
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9
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10 run
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11 ===
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12
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13 Run an ad-hoc command. You may specify the node to run as positional argument, or let it
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14 empty to list available commands.
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15
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16 By default the commands from your server are used, but with ``-j JID, --jid JID`` you can
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17 specify a different entity.
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18
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19 You can automatically execute commands by using ``-f KEY VALUE, --field KEY VALUE`` and
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20 ``-S, --submit`` as many time as needed. ``--field`` expect a ``KEY`` which is the name
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21 of the field to set. If you don't know which name to use, you can run the command to
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22 automatise a first time manually with ``--verbose, -v`` flag, this will display fields
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23 names when you have to fill them.
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24
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25 Once all fields of a page are specified, you may use ``-S, --submit`` to validate it, then
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26 if suitable use again ``--field`` to set fields of next page and ``--submit`` again, and
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27 so on as many times as you need.
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28
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29 Don't forget that you can use your shell substitution capabilities if necessary, for
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30 instance if you have a pre-registered announce to send.
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31
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32 examples
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33 --------
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34
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35 Get a list of available commands on your server to launch a command::
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36
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37 $ jp ad-hoc run
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38
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39 If your server supports `XEP-0133`_ and you're an admin on it, you can send announcements
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40 to online users. This can be useful to notify an imminent maintenance of the server. Here
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41 we notify online users that the server will be shutdown in 30 min, using a shell
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42 substitution capabilities with a pre-registered message in the file
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43 ``~/announces/maintenance_30.txt``, then we submit it::
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44
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45 $ jp ad-hoc run "http://jabber.org/protocol/admin#announce" -f subject "Maintenance in 30 min" -f announcement "$(<~/announces/maintenance_30.txt)" -S
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46
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47 Get your server uptime (if supported by your server)::
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48
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49 $ jp ad-hoc run uptime
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50
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51 Run the commands available at the service with the jid ``someservice.example.org``::
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52
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53 $ jp ad-hoc run -s someservice.example.org
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54
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55 Run you server commands with verbosity so you get the name of the fields that you can fill
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56 automatically later::
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57
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58 $ jp ad-hoc run -v
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59
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60 .. _XEP-0133: https://xmpp.org/extensions/xep-0133.html
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61
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62 list
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63 ====
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64
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65 List ad-hoc commands available at a service.
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66
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67 examples
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68 --------
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69
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70 List ad-hoc commands available at your server::
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71
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72 $ jp ad-hoc list
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73
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74 List ad-hoc commands available at a chat service::
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75
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76 $ jp ad-hoc list -j conference.example.org
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77
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78 remote
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79 ======
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80
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81 Create a remote control from launched media players. Ad-hoc commands to control the media
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82 player will be added to your device, allowing anybody allowed (including yourself from an
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83 other device, e.g. a phone) to remotely do action like ``play``, ``pause``, etc.
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84
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85 To add a device, just use the name of the software (e.g. ``vlc``, ``smplayer``). You can
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86 specify who is allowed to control this media player with the following options:
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87
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88 ``-j [JIDS [JIDS ...]], --jids [JIDS [JIDS ...]]``
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89 jids of entities allowed to control the media player
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90
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91 ``g [GROUPS [GROUPS ...]], --groups [GROUPS [GROUPS ...]]``
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92 groups (from your roster) allowed to control you remote
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93
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94 ``--forbidden-groups [FORBIDDEN_GROUPS [FORBIDDEN_GROUPS ...]]``
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95 groups (from your roster) which are **NOT** allowed to control your media player
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96
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97 ``--forbidden-jids [FORBIDDEN_JIDS [FORBIDDEN_JIDS ...]]``
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98 jids of entities which are **NOT** allowed to control your media player
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99
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100 If you want the commands to run repeatedly (in opposition of stopping after first action
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101 is sent), you may use the ``-l, --loop`` option. Most of time you'll want to use it.
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102
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103 .. note::
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104
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105 SàT already creates automatically a remote control if it finds a media player. This
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106 manual way to create a remote control predate the automatic remote control, and is
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107 currently more flexible in that you can specify who can access the remote control
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108 (automatic remote control is only accessible by the jid of the profile).
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109
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110 examples
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111 --------
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112
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113 Create a remote control for a running VLC instance::
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114
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115 $ jp ad-hoc remote vlc -l
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116
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117 Create a remote control for a running SMPlayer instance, and allowing anybody from your
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118 ``housemates`` group to use it::
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119
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120 $ jp ad-hoc remote smplayer -g housemates -l