Thank you for the information. I will have a look and see what I can
find out. I hesitate to compile mapscript by myself, I like my package
manager ;-)
Frank
Am 14.02.2011 11:58, schrieb Eichner, Andreas - SID-NLKM:
Hi,
it looks like the Python MapScript module is compiled against a different regex libary
than the Python interpreter uses. The "premature end of script headers" is
usually caused by a SIGSEGV where the script gets killed before being able to send any
headers. I would suggest to build python-mapscript on your own.
HTH
-----Ursprüngliche Nachricht-----
Von: mapserver-users-boun...@lists.osgeo.org
[mailto:mapserver-users-boun...@lists.osgeo.org] Im Auftrag von Frank Broniewski
Gesendet: Freitag, 11. Februar 2011 10:30
An: mapserver-users@lists.osgeo.org
Betreff: Re: [mapserver-users] WMS SLD Troubles
Ok, I've found a problem with the parsing of OWSRequest.setParameter()
My code:
...
elif request.method == 'GET':
logging.debug("%s: Request method is GET" %
datetime.datetime.now())
for key, value in request.args.items():
if key.lower() == 'sld':
logging.debug("%s: Escaping %s" %
(datetime.datetime.now(), key))
logging.debug("%s: Value is %s" %
(datetime.datetime.now(), value))
value = urllib.quote_plus(value)
g.ows_request.setParameter(key, value)
if key.lower() == 'sld':
value = g.ows_request.getValueByName(key)
logging.debug("%s: Loaded Param %s" %
(datetime.datetime.now(), value))
mapscript.msIO_installStdoutToBuffer()
success = g.ows_map.OWSDispatch(g.ows_request)
...
What I'm basically doing here is setting the request parameters with
setParameter on the ows_reqeuest object. When there is _no_ sld
parameter in the request, escaping is not necessary. Once there is a sld
request parameter, mapscript crashes when doing setParameter('SLD',
'http://192.168.0.111:8502/sld/style.sld')
[Fri Feb 11 11:10:32 2011] [error] [client 192.168.0.2] success =
g.ows_map.OWSDispatch(g.ows_request)
[Fri Feb 11 11:10:32 2011] [error] [client 192.168.0.2] File
"/usr/lib/python2.5/site-packages/mapscript.py", line 1515, in OWSDispatch
[Fri Feb 11 11:10:32 2011] [error] [client 192.168.0.2] def
OWSDispatch(*args): return _mapscript.mapObj_OWSDispatch(*args)
[Fri Feb 11 11:10:32 2011] [error] [client 192.168.0.2] MapServerError:
msEvalRegex(): Regular expression error. String failed expression test.
[Fri Feb 11 11:10:32 2011] [error] [client 192.168.0.2] msEvalRegex():
Regular expression error. String failed expression test.
Using urllib.quote_plus I escaped the SLD URL back to a web
representation and set it with setParameter.
SLD=http%3A%2F%2F192.168.0.111%3A8502%2Fsld%2Fstyle.sld
request.args:
Key: SLD
Value: http://192.168.0.111:8502/sld/style.sld
Quoted Value: http%3A%2F%2F192.168.0.111%3A8502%2Fsld%2Fstyle.sld
Loaded Param http%3A%2F%2F192.168.0.111%3A8502%2Fsld%2Fstyle.sld
Unfortunately quoting does not help, but the error this time is less
clear than the one before:
[Fri Feb 11 11:11:51 2011] [error] [client 192.168.0.2] Premature end of
script headers: gishosting.wsgi
the mapserver error log (debug 5) shows also no entry, so I am
completely clueless what's going wrong here.
Does someone have a clue whats going on there? Datasource is a Postgis
database (OpenStreetMap data) which works without the SLD parameter.
System is a Ubuntu Hardy 8.04 with the
deb http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu hardy main
deb-src http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu
hardy main sources
/usr/lib/cgi-bin/mapserv -v
MapServer version 5.6.6 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
OUTPUT=SWF OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE
SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT
SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER
SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS
SUPPORTS=RGBA_PNG INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL
INPUT=SHAPEFILE
dpkg -l
||/ Name Version Description
+++-==============-==============-============================================
ii apache2 2.2.8-1ubuntu0 Next generation, scalable, extendable
web se
ii python-mapscri 5.6.6-2~hardy1 Python library for MapServer
ii mapserver-bin 5.6.6-2~hardy1 MapServer utilities
ii cgi-mapserver 5.6.6-2~hardy1 CGI executable for MapServer
Python 2.5.2 (r252:60911, Jan 20 2010, 23:14:04)
And self compiled libapache2-mod-wsgi
Frank
Am 10.02.2011 15:00, schrieb Frank Broniewski:
Ok, we've narrowed it down a bit. When we use the cgi-mapserver the SLD
styling works, so the issue seems to be with (python) mapscript ...
I will investigate further
Frank
Am 09.02.2011 09:18, schrieb Frank Broniewski:
Hello,
thank you for your kind help :-) I've put the requested informations
below.
Frank
INFO:
we're using
/usr/lib/cgi-bin/mapserv -v
MapServer version 5.6.6 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
OUTPUT=SWF OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE
SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT
SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER
SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS
SUPPORTS=RGBA_PNG INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL
INPUT=SHAPEFILE
on Ubuntu 8.04 with the ubuntu-gis ppa.
Original layer definition:
LAYER
NAME "post"
STATUS Off
CONNECTIONTYPE Postgis
CONNECTION "host=localhost dbname=osm user= password= port=5432"
DATA "nway FROM
(SELECT way as nway, osm_id, amenity, name
FROM planet_osm_point
WHERE amenity='post_box' OR amenity='post_office'
)
as foo using unique osm_id using SRID=900913"
TYPE Point
PROCESSING "CLOSE_CONNECTION=DEFER"
CLASSITEM "amenity"
DUMP true
# ---------------------------------------------------------------
# Projection configuration
# ---------------------------------------------------------------
INCLUDE "/usr/local/mapconf/share/projections/google.map"
METADATA
# lots of metadata ....
END
END
the SLD:
<NamedLayer>
<Name>post</Name>
<UserStyle>
<Title>Post</Title>
<FeatureTypeStyle>
<Rule>
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>amenity</ogc:PropertyName>
<ogc:Literal>post_box</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>
<PointSymbolizer>
<Graphic>
<ExternalGraphic>
<OnlineResource
xlink:type="simple"
xlink:href="http://192.168.0.111:8502/sld/img/briefkasten.png"; />
<Format>image/png</Format>
</ExternalGraphic>
<Size>40</Size>
</Graphic>
</PointSymbolizer>
</Rule>
<Rule>
<Filter>
<PropertyIsEqualTo>
<PropertyName>amenity</PropertyName>
<Literal>post_office</Literal>
</PropertyIsEqualTo>
</Filter>
<PointSymbolizer>
<Graphic>
<ExternalGraphic>
<OnlineResource
xlink:type="simple"
xlink:href="http://192.168.0.111:8502/sld/img/posthorn.png"; />
<Format>image/png</Format>
</ExternalGraphic>
<Size>40</Size>
</Graphic>
</PointSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</NamedLayer>
the generated map file:
LAYER
CLASSITEM "amenity"
CONNECTION "host=localhost dbname=osm user= password= port=5432"
CONNECTIONTYPE POSTGIS
DATA "nway FROM
(SELECT way as nway, osm_id, amenity, name
FROM planet_osm_point
WHERE amenity='post_box'
OR amenity='post_office'
)
as foo using unique osm_id using SRID=900913"
DUMP TRUE
METADATA
# metadata
END
NAME "post"
PROCESSING "CLOSE_CONNECTION=DEFER"
PROJECTION
"proj=merc"
"a=6378137"
"b=6378137"
"lat_ts=0"
"lon_0=0"
"x_0=0"
"y_0=0"
"k=1"
"nadgrids=@null"
"units=m"
"no_defs"
END
STATUS ON
TYPE POINT
UNITS METERS
CLASS
NAME "Unknown"
EXPRESSION ("[amenity]" = "post_box")
STYLE
ANGLE 360
COLOR 0 0 0
SIZE 40
SYMBOL "http://192.168.0.111:8502/sld/img/briefkasten.png";
WIDTH 1
END
END
END
Am 08.02.2011 15:57, schrieb Yewondwossen Assefa:
What version of MapServer?
Also, what is the part in the map file that is causing the problem:
* if you remove the EXPRESSION ("[amenity]" = "post_box") from the
generated map, will that work
* Is the layer's FILTER element set (on the generated map)? If so what
is the value?
A full layer definition in the generated map would be useful. A full sld
might also help.
regards,
On 07/02/2011 4:58 AM, Frank Broniewski wrote:
Hello,
We're using a OpenStreetMap Postgis database as a source for our
geo-servers. We want to provide WMS and WFS services on the data. In
order to do the styling only once, we are using SLDs, which works
mostly fine.
One of our layers does not render as a WMS, it throws a
"msEvalRegex(): Regular expression error. String failed expression
test." Error during execution.
We identified the layer, and it's the one rendering post boxes. The
corresponding SLD definition is using a filter:
<Filter>
<PropertyIsEqualTo>
<PropertyName>amenity</PropertyName>
<Literal>post_office</Literal>
</PropertyIsEqualTo>
</Filter>
Using debug-level 5, the mapfile after SLD application looks like
# ...
# more definitions
# ...
CLASSITEM "amenity"
DATA "nway FROM
(SELECT way as nway, osm_id, amenity, name
FROM planet_osm_point
WHERE amenity='post_box'
OR amenity='post_office'
)
as foo using unique osm_id using SRID=900913"
# ...
# more definitions
# ...
CLASS
NAME "Unknown"
EXPRESSION ("[amenity]" = "post_box")
STYLE
ANGLE 360
COLOR 0 0 0
SIZE 40
SYMBOL "http://192.168.0.111:8502/sld/img/briefkasten.png";
WIDTH 1
END
END
We simply can't figure out, what might be the problem here. The whole
issue seem to be related to the filter element, removing it makes the
layer render. Using the generated map layer, rendering fails with the
same error.
So I would be happy if someone with more experience with SLDs can give
me a hint about whats going wrong here.
Frank
--
Frank BRONIEWSKI
METRICO s.à r.l.
géomètres
technologies d'information géographique
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![http://192.168.0.111:8502/sld/img/briefkasten.png"](http://192.168.0.111:8502/sld/img/briefkasten.png"){kind=link}
![http://192.168.0.111:8502/sld/img/posthorn.png"](http://192.168.0.111:8502/sld/img/posthorn.png"){kind=link}