[Xastir] javAPRSSrvr Filter Strings

[Lynn W. Deffenbaugh (Mr)]

Personally, I just recommend that any use of the o/ filter user the *.  
It may mean that additional objects are received, but the following 
should work for you.

o/STEAM*/UP844*

And where did you find documented that the o/ filter term needs to be 
last?  I completely missed that one but it might explain some wierdness 
that I've seen.

Lynn (D) - KJ4ERJ -Author of APRSISCE for Windows Mobile and Win32

PS.  Any specification that uses blanks as delimiters between terms AND 
as part of the terms is just plain busted IMHO.

On 10/19/2012 3:32 PM, Curt, WE7U wrote:
>
> Anyone messing with one of the (three) Firenet servers to get their 
> connection:  We've converted to javAPRSSrvr 4.x, which does filtering 
> differently.  A difference I just ran across:
>
> I just got caught by a change in how javAPRSSrvr interprets the filter 
> string.
>
> I was using this filter in Xastir, connected to Firenet-3 and not 
> seeing the "STEAM" object come through:
>
>     m/800 o/STEAM/UP844 t/n e/WE7U-WX
>
> I had to change to this:
>
>    m/800 o/STEAM    /UP844     t/n e/WE7U-WX
>
> Notice the extra spaces after "STEAM" and "UP844" to make a 
> 9-character object name.  I think for other S/W you have to prefix the 
> string with "filter " but Xastir adds it for you behind the scenes.
>
> Now I'm seeing the steam train happily steaming along heading towards 
> Shreveport, LA, with a Firenet connection to Xastir! Unfortunately the 
> "t/n e/WE7U-WX" filters don't work.
>
> Even more fun:  Pete says the Object filter must be last on the filter 
> line.  Try that in Xastir and it will trim off the trailing spaces.
>
>     "m/800 t/n e/WE7U-WX o/STEAM    /UP844    "
>
> becomes:
>
>     "m/800 t/n e/WE7U-WX o/STEAM    /UP844"
>
> Which means the "UP844" part of the filter above won't work.  I'm 
> waiting for "STEAM" to start moving again to see if that part works.
>
> Yep.  That part worked.  Then reversed the two like this to test STEAM 
> as the last element:
>
>     "m/800 t/n e/WE7U-WX o/UP844    /STEAM    "
>
> Xastir chopped off the last four chars and STEAM stopped working. Then 
> went to this and got everything working again:
>
>     "m/800 t/n e/WE7U-WX o/UP844    /STEAM    /"
>
> So...  If using Xastir and filtering against a javAPRSSrvr4.x server 
> (Firenet-1/2/3), you'll have to move the Object portion to the end, 
> put in a trailing slash, and count spaces.  There should be nine chars 
> total in an Object name.
>
> Having to count spaces is ridiculous.  It requires the user to have 
> some familiarity with the APRS spec and/or to read the filter docs 
> VERY carefully.  Existing filter strings that have worked for years 
> may be broken now and there's no indication of this to the user.  I'm 
> talking to Pete to see if this can't be resolved in a better manner 
> than having every user change their filter strings.
>
> At least now you're informed.
>