On Wed, 20.08.08 15:39, Nathan Huesken ([EMAIL PROTECTED]) wrote: > Hello,
hey, > I want to write a python program which browses for avahi services, dumps them > and quits. > I can not find no more python-avahi documentation than this: > http://avahi.org/wiki/PythonBrowseExample > > I wonder: > - Is it possible to browse for services not asyncronly. No this is not possible. Browsing for services is always an asynchronous operatoin. > - If I have to browse for services asyncronly (as in the example), > is there some way to know when I have all services? Yes and no. The mDNS/DNS-SD protocol doesn't really allow this. Services can come and go all the time, you can never know if the list you assembled is complete or not. However, because this is sometimes useful to have we provide something similar. Browser obejcts will signal the AVAHI_BROWSER_ALL_FOR_NOW event, when Avahi thinks that no further response will be received any time soon. This is implemented by just waiting long enough so that all response delays by other hosts are known to be elapsed, with the exception that if the specific query is already available in the cache we return immediately. This means that depending of the state of the cache it might take 1s or so until ALL_FOR_NOW is triggered avahi-browse -t uses ALL_FOR_NOW to terminate when no further services are expected to be found. Usually however, it is more applicable to do long running queries and provide the user with a live view on the set of services found. Or the other way round: using ALL_FOR_NOW is often enough a sign for a broken UI. Before you proceed hacking, please make sure that this is not the case for what you are trying to do. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net ICQ# 11060553 http://0pointer.net/lennart/ GnuPG 0x1A015CC4 _______________________________________________ avahi mailing list avahi@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/avahi
