[mapserver-users] WMS SLD Troubles
Frank Broniewski
brfr at metrico.lu
Tue Feb 15 09:35:09 EST 2011
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-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] Im Auftrag von Frank Broniewski
> Gesendet: Freitag, 11. Februar 2011 10:30
> An: mapserver-users at 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
rue des Romains 36
L-5433 NIEDERDONVEN
tél.: +352 26 74 94 - 28
fax.: +352 26 74 94 99
http://www.metrico.lu
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