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core (xmpp): check presence of some keys in attachment before using them: in `completeAttachments` `url` was used to complete a missing name, but it may be missing with some attachments, thus its presence is now checked.
author Goffi <goffi@goffi.org>
date Thu, 06 Oct 2022 16:02:05 +0200
parents c80a0f864b5d
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=========================================
ping: get response time of an XMPP entity
=========================================

``ping`` is more or less the equivalent of the command of the same name on most OSes, but
for XMPP. It send a `XEP-0199`_ PING and wait for the answer. When (and if) received, the
time to receive the answer is shown, else the time to receive the error message is shown.
This can be helpful to quickly test the connection with the server or a device.

If you need to get only the response time (without text around), you may use ``-d,
--delay-only``.

.. _XEP-0199: https://xmpp.org/extensions/xep-0199.html

example
-------

Get reponse time of a server::

  $ li ping example.org