c66a4d4097
- update most of the examples with slixmpp - change the help channels pointed out in the doc - add a page listing differences from slixmpp and how to use asyncio nicely with slixmpp - fix some in-code rst documentation
67 lines
2.2 KiB
ReStructuredText
67 lines
2.2 KiB
ReStructuredText
.. _echocomponent:
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=================================
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Create and Run a Server Component
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=================================
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.. note::
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If you have any issues working through this quickstart guide
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join the chat room at `slixmpp@muc.poez.io
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<xmpp:slixmpp@muc.poez.io?join>`_.
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If you have not yet installed Slixmpp, do so now by either checking out a version
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with `Git <http://git.poez.io/slixmpp>`_.
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Many XMPP applications eventually graduate to requiring to run as a server
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component in order to meet scalability requirements. To demonstrate how to
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turn an XMPP client bot into a component, we'll turn the echobot example
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(:ref:`echobot`) into a component version.
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The first difference is that we will add an additional import statement:
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.. code-block:: python
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from slixmpp.componentxmpp import ComponentXMPP
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Likewise, we will change the bot's class definition to match:
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.. code-block:: python
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class EchoComponent(ComponentXMPP):
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def __init__(self, jid, secret, server, port):
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ComponentXMPP.__init__(self, jid, secret, server, port)
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A component instance requires two extra parameters compared to a client
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instance: ``server`` and ``port``. These specifiy the name and port of
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the XMPP server that will be accepting the component. For example, for
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a MUC component, the following could be used:
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.. code-block:: python
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muc = ComponentXMPP('muc.slixmpp.com', '******', 'slixmpp.com', 5555)
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.. note::
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The ``server`` value is **NOT** derived from the provided JID for the
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component, unlike with client connections.
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One difference with the component version is that we do not have
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to handle the :term:`session_start` event if we don't wish to deal
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with presence.
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The other, main difference with components is that the
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``'from'`` value for every stanza must be explicitly set, since
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components may send stanzas from multiple JIDs. To do so,
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the :meth:`~slixmpp.basexmpp.BaseXMPP.send_message()` and
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:meth:`~slixmpp.basexmpp.BaseXMPP.send_presence()` accept the parameters
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``mfrom`` and ``pfrom``, respectively. For any method that uses
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:class:`~slixmpp.stanza.iq.Iq` stanzas, ``ifrom`` may be used.
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Final Product
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-------------
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.. include:: ../../examples/echo_component.py
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:literal:
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