[mapserver-users] FCGI and SVG output goes to STDERR?

[Nick Webb]

On Mon, Jul 1, 2013 at 5:50 PM, Frank Warmerdam <warmerdam at pobox.com> wrote:

> Nick,
>
> As I vaguely recall from when I worked on fastcgi support in MapServer,
> only output formats that can be redirected through the low level mapserver
> io layer (ms_io*.c) will work properly in fastcgi mode.  I'm guessing the
> svg encoder just writes directly to stdout.  If my theory is correct,
> non-trivial code changes would be necessary to make this work.
>
>
>
Thanks Frank, that actually makes perfect sense.  I'm not all that
familiar, but it seems that I read somewhere that a legacy version of
mapserver had native SVG support, which in turn would work with fastcgi?
 Seems I also read native support is on the wish list for a future release
as well.

>
>
>
> On Mon, Jul 1, 2013 at 5:16 PM, Nick Webb <nickw at redwireservices.com>wrote:
>
>> List,
>>
>> I've really tried hard to nail this down, but it makes no sense to me.
>>  I'm not a map guy, but am a system administrator for one.
>>
>> We have a mapserver setup that works fine for both PNG and SVG when we
>> use the standard apache cgi module.  When we switch to mod_fcgid, however,
>> SVG displays no output in the browser and instead seems to output proper
>> SVG/XML to the apache error log!  PNG continues to work fine.
>>
>> I'm flabbergasted and nothing I try seems to work.  I even set it up on
>> another server and I get the same result, given I'm following the same
>> build steps.
>>
>> Any ideas on where I can go next?
>>
>> Perhaps the SVG is not really valid, but I've copied and pasted the
>> XML/SVG from the error_log to a static file, and that also displays fine
>> via a browser.
>>
>> Here is the error_log output:
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="
>> http://www.w3.org/1999/xlink" width="200pt" height="154pt" viewBox="0 0
>> 200 154" version="1.1">
>> <g id="surface0">
>> . . .
>> </g>
>> </svg>
>> [Tue Jul 02 00:12:11.947149 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.9:2118] mod_fcgid: stderr: CGI Request 1 on process 2405
>> [Tue Jul 02 00:12:11.947213 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.9:2118] mod_fcgid: stderr: msDrawMap(): rendering using
>> outputformat named svg (CAIRO/SVG).
>> [Tue Jul 02 00:12:11.947223 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.9:2118] mod_fcgid: stderr: msDrawMap(): WMS/WFS set-up and
>> query, 0.000s
>> [Tue Jul 02 00:12:11.947230 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.9:2118] mod_fcgid: stderr: msDrawMap(): Layer 0 (thematic),
>> 0.040s
>> [Tue Jul 02 00:12:11.947238 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.9:2118] mod_fcgid: stderr: msDrawMap(): Drawing Label Cache,
>> 0.000s
>> [Tue Jul 02 00:12:11.947245 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.9:2118] mod_fcgid: stderr: msDrawMap() total time: 0.040s
>> [Tue Jul 02 00:12:11.947253 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.69:2118] mod_fcgid: stderr: msSaveImage(stdout) total time:
>> 0.005s
>> [Tue Jul 02 00:12:11.947261 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.9:2118] mod_fcgid: stderr: mapserv request processing time
>> (msLoadMap not incl.): 0.045s
>> [Tue Jul 02 00:12:11.947268 2013] [fcgid:warn] [pid 2398] [client
>> 50.197.85.9:2118] mod_fcgid: stderr: msFreeMap(): freeing map at
>> 0x8881a0.
>>
>>
>> DEBUG 5 is set logging to the same file (stderr).
>>
>>
>> ./mapserv -v
>> MapServer version 6.2.1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG SUPPORTS=PROJ
>> SUPPORTS=GD SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=ICONV
>> SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_CLIENT
>> SUPPORTS=WCS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS
>> INPUT=JPEG INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
>>
>>
>> Thanks,
>> Nick
>>
>> _______________________________________________
>> mapserver-users mailing list
>> mapserver-users at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>
>>
>
>
> --
>
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam,
> warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Software Developer
>
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