On Tue, Dec 2, 2008 at 8:21 AM, Gabriel Rossetti <gabriel.rossetti@arimaz.com> wrote:

Gabriel Rossetti wrote:

Hello everyone,

I wrote an XMPP client and I have a question, when it tries to connect and the server is not listening, it doesn't send back an error and tries forever. I see that this function (twisted/names/srvconnect.py):

def _ebGotServers(self, failure):
failure.trap(DNSNameError)

# Some DNS servers reply with NXDOMAIN when in fact there are
# just no SRV records for that domain. Act as if we just got an
# empty response and use fallback.

self.servers = []
self.orderedServers = []

traps the exception so it never propagates to me, so I can't handle it. Any ideas? I using the XMPP client example as a base for my code.

Thank you,
Gabriel

Ok, the code I showed has nothing to do with the problem I think, what I don't get is the client never returns an error if nobody's listening...

It may be better to show a log of what is happening.

It should show something like the following :

2008-12-02 08:57:01-0500 [-] reactor class: twisted.internet.selectreactor.SelectReactor.
2008-12-02 08:57:01-0500 [-] Starting factory <twisted.words.protocols.jabber.xmlstream.XmlStreamFactory object at 0xf6b490>
2008-12-02 08:57:02-0500 [-] /etc/resolv.conf changed, reparsing
2008-12-02 08:57:02-0500 [-] Resolver added ('192.168.2.1', 53) to server list
2008-12-02 08:57:02-0500 [-] <class 'twisted.names.dns.DNSDatagramProtocol'> starting on 31847
2008-12-02 08:57:02-0500 [-] Starting protocol <twisted.names.dns.DNSDatagramProtocol object at 0xfb9a90>
2008-12-02 08:57:02-0500 [-] (Port 31847 Closed)
2008-12-02 08:57:02-0500 [-] Stopping protocol <twisted.names.dns.DNSDatagramProtocol object at 0xfb9a90>
2008-12-02 08:57:02-0500 [-] <twisted.names.srvconnect.SRVConnector instance at 0xa236c8> will retry in 2 seconds
2008-12-02 08:57:02-0500 [-] Stopping factory <twisted.words.protocols.jabber.xmlstream.XmlStreamFactory object at 0xf6b490>

This will keep trying until you quit. You can set a limit on how many times it retries.

Best regards,

Gabriel

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