Hi Karsten,
Karsten J wrote:
Hello,
I am studying at a University in Germany. We started a little project
which tracks the location of people, connects them and helps them to
interact on different levels. Well, in the end it will.
We decided to use XMPP as our protocol and as it turns out there is
almost always an XEP which covers something we want to do. I really
start liking it.
Since we don't have the capacity to write our own server we decide to
use an existing one and enhance its features with an external
component. However, I kinda ran into a problem and I hope you can help
me out. In the XEP-0114 it says that an external component can do
things that clients cannot. I tried to find a list of those things but
till now I wasn't lucky.
I've ran into a similar use case myself. External components don't
have that kind of access. An external component basically registers
itself as component.domain.com, and can send and receive messages
from/to all JIDs at that domain (i.e. [email protected],
[email protected], component.domain.com, etc.). But the xmpp
server will not route stanzas that are not addressed to the component to
it, nor will the server allow the component to send stanzas addressed
from other domains.
There is one special thing my component needs
to be able to do. I would like my component to listen to buddy
requests and "buddy acceptances" of clients which are received by the
server. As far as I know an internal component or something like a
packet interceptor as a plug in which sends the packets on to my
component could do that. However, before I start writing a plug in for
a specific server implementation I would like to know if there is a
way within the specifications of the protocol.
We wrote a plugin for openfire that just forwards stanzas down an XML
pipe over TCP, and use an external (non-XMPP) service to filter out the
stanzas we are interested in using xpath expressions (this was really
easy with twisted words/wokkel).
Alternatively, you can implement the logic completely inside your plugin.
I don't think you'll be able to pass stanzas from a plugin or internal
component to an external component directly, the component protocol
doesn't support that. If you really want to use an external XMPP
component, I can only think of wrapping your original stanza in another
stanza addressed to the component.
Good luck,
Ilya
I need this feature to do some logic on the component side.
I hope you understand my problem and thank you for any advices.
best whishes,
Karsten Jeschkies
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Ilya Braude
Lead Software Engineer
Drakontas LLC
(267) 415-4769
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