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