[mapserver-users] Layer Object Parameter Substitution
fromURLusing GIS
Heiko Schröter
schroete at iup.physik.uni-bremen.de
Wed Apr 8 03:37:00 EDT 2009
On Dienstag, 7. April 2009 15:52:10 you wrote:
Hi Steve,
thanks for the clues. I'am probably to dumb for this.
Firefox replaces the " with " and mapserv5.4 complains. I've tried brute
force backslashes than but that doesn't work either (of course).
I've tried than with a little webpage in case that it is a coding (ISO or UTF)
problem. But this fails as well. Do you have a working example of what exactly
one has to use within the URL?
Sorry to bother you again with this.
(Since we are using Satellite global mapping, we need to change content and
projection on the fly...)
The Webpage:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
<title>Mapserver 5.4 Test</title>
</head>
<body>
<a href="http://localhost/cgi-
bin/mapserv?MAP=/home/schroete/sciadaten/MapServer/country98/heiko1.map&
LAYERS=karte,grid,psc&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&
STYLES=&FORMAT=image/png&SRS=epsg:4326&BBOX=-180,-90,180,90&
WIDTH=600&HEIGHT=300&
map.layer[psc]=FILTER+"orbitnr&eq;3456"">
link </a>
</body>
</html>
And this is what Firefox does:
http://localhost/cgi-bin/mapserv?
MAP=/home/schroete/sciadaten/MapServer/country98/heiko1.map&
LAYERS=karte,grid,psc&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&
STYLES=&FORMAT=image/png&SRS=epsg:4326&BBOX=-180,-90,180,90&
WIDTH=600&HEIGHT=300&
map.layer[psc]=FILTER+%22orbitnr&eq;3456%22
(The %22 will be shown as " in the Firefox URL line)
Results in:
getSymbol(): Symbol definition error. Parsing error near ("):(line 1)
It doesn't matter if you escape the = sign or use single qoutes within the
Filter string.
I'am testing now the OpenLayer approach and will report later.
Thanks for your effort.
Regards
Heiko
> Hi Heiko: Two things:
>
> 1) There's an error in your URL. The syntax should be something like:
>
> map.layer[psc]=FILTER+'orbitnr=6758'
>
> but you'd need to escape the ' and = characters in the URL.
>
> 2) Setting extra vars in OpenLayers is easy. Something like this would
> work:
>
> myLayer = new OpenLayers.Layer.MapServer(
> 'stuff',
> 'http://some.site.com/cgi-bin/mapserv?map=/some/mapfile.map',
> { layers:'stuff', map_transparent: 'true',
> somevar: 'somevalue',
> },
> { ratio:1, singleTile:true, transitionEffect:'resize',
> isBaseLayer:false }
> );
>
> You can then modify the content of the 'somevar' variable. With code
> like:
>
> myLayer.params.somevar = 'somenewvalue';
>
> This will tag somevar=somenewvalue onto the URL passed to MapServer.
>
> Steve
>
> >>> Heiko Schröter <schroete at iup.physik.uni-bremen.de> 04/07/09 5:26 AM
>
> On Montag, 6. April 2009 19:57:19 you wrote:
>
> Hello,
>
> the error seems to remain in mapserver 5.4:
>
> /usr/lib/cgi-bin/mapserv -v
> MapServer version 5.4.0-beta4 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG
> OUTPUT=WBMP
> OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=ICONV
> SUPPORTS=WMS_SERVER
> INPUT=TIFF INPUT=EPPL7 INPUT=JPEG INPUT=POSTGIS INPUT=SHAPEFILE
>
> http://localhost/cgi-bin/mapserv?
> MAP=/home/schroete/sciadaten/MapServer/country98/heiko1.map&
> LAYERS=karte,grid,psc&SERVICE=WMS&VERSION=1.1.1&
> REQUEST=GetMap&STYLES=&
> FORMAT=image/png&SRS=epsg:4326&BBOX=-180,-90,180,90&
> WIDTH=600&HEIGHT=300&
> map.layer[psc].filter='orbitnr=6758'
>
> loadLayer(): Unknown identifier. Parsing error near (orbitnr=6758):(line
> 1)
>
>
> Mapfile as below. The map is ok without the 'map.layer[]...' stuff.
>
> Does a kind soul knows howto do the runtime substitution from within
> OpenLayer
> (i know it is not the 100% correct list, but maybe someone has hit this
> before).
>
> Regards
> Heiko
>
> > You'll need to use 5.4 to get this functionality. That version add
> > support to allow you to define
> > validation strings to lock down what values can be passed for the
> > variable. Another solution is
> > to consider using runtime substitution to do something similar. That
> > works well if the SQL is
> > pretty much fixed:
> >
> > FILTER 'wert=%myval%'
> >
> > It's also easier to secure.
> >
> > Steve
> >
> > >>> On 4/6/2009 at 4:01 AM, in message
> >
> > <200904061101.54781.schroete at iup.physik.uni-bremen.de>, Heiko Schröter
> >
> > <schroete at iup.physik.uni-bremen.de> wrote:
> > > Hello,
> > >
> > > when passing a 'FILTER' parameter to be changed with the URL to use
> >
> > GIS
> >
> > > requests, mapserv(5.0.3) fails with:
> > > loadLayer(): Unknown identifier. Parsing error near (FILTER):(line
> >
> > 1)
> >
> > > The call is:
>
> http://localhost/cgi-bin/mapserv?MAP=/MapServer/country98/heiko1.map&
>
> > > LAYERS=karte,grid,psc&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&
> > > STYLES=&EXCEPTIONS=application/vnd.ogc.se_inimage&
> > > FORMAT=image/png&
> > > SRS=epsg:4326&BBOX=-180,7.91,-82.08,105.83&
> > > WIDTH=256&HEIGHT=256&
> > > MAP.LAYER[psc].FILTER='wert=0'
> > > (Linebreaks included for readability)
> > >
> > > When omitting this part: " MAP.LAYER[psc].FILTER='wert=0' " the
>
> map
>
> > is
> >
> > > generated fine (without the proper GIS data of course).
> > >
> > > I did read several comments in the archive and the net about this
> >
> > issue but
> >
> > > haven't found a solution to this problem.
> > > What do i miss here ?
> > >
> > > Thanks and Regards
> > > Heiko
> > >
> > >
> > > The Mapfile:
> > > MAP
> > > NAME WELT
> > > DEBUG ON
> > > STATUS ON
> > > #SIZE 647 320
> > > SIZE 800 400
> > > IMAGETYPE PNG24
> > > IMAGECOLOR 240 240 240
> > > SHAPEPATH "data"
> > > EXTENT -180 -90 180 90
> > > UNITS DD
> > > WEB
> > > IMAGEPATH "images"
> > > IMAGEURL "images"
> > > MINSCALE 50000
> > > MAXSCALE 400000000
> > > METADATA
> > > "wms_title" "Example WMS Server"
> > > "wms_onlineresource"
> >
> > "http://localhost/cgi-bin/mapserv?map=heiko.map&"
> >
> > > "wms_srs" "epsg:4326 epsg:32661 epsg:32761"
> > > END
> > > END
> > > SYMBOL
> > > NAME 'circle'
> > > TYPE ELLIPSE
> > > POINTS 1 1 END
> > > FILLED TRUE
> > > END
> > > SYMBOL
> > > NAME 'star'
> > > TYPE VECTOR
> > > FILLED TRUE
> > > POINTS
> > > 0 .375
> > > .35 .375
> > > .5 0
> > > .65 .375
> > > 1 .375
> > > .75 .625
> > > .875 1
> > > .5 .75
> > > .125 1
> > > .25 .625
> > > END
> > > END
> > > PROJECTION
> > > "init=epsg:4326"
> > > END
> > > LAYER
> > > NAME "karte"
> > > TYPE POLYGON
> > > STATUS ON
> > > OPACITY 50
> > > DATA "cntry98"
> > > METADATA
> > > "wms_title" "karte layer"
> > > "DESCRIPTION" "Grid"
> > > END
> > > PROJECTION
> > > "init=epsg:4326"
> > > END
> > > CLASS
> > > NAME "karte_color"
> > > OUTLINECOLOR 60 60 60
> > > COLOR 100 100 100
> > > SYMBOL 0
> > > END
> > > END
> > > LAYER
> > > NAME "grid"
> > > OPACITY 60
> > > METADATA
> > > "wms_title" "grid layer"
> > > "DESCRIPTION" "Grid"
> > > END
> > > TYPE LINE
> > > STATUS ON
> > > PROJECTION
> > > "init=epsg:4326"
> > > END
> > > CLASS
> > > NAME "Graticule"
> > > COLOR 0 0 0
> > > # Labels comented out for readabilty in the moment
> > > # LABEL
> > > # COLOR 0 0 0
> > > # #FONT "fritqat"
> > > # #TYPE truetype
> > > # MINDISTANCE 1000
> > > # SIZE SMALL
> > > # POSITION LR
> > > # PARTIALS FALSE
> > > # BUFFER 5
> > > # OUTLINECOLOR 200 200 200
> > > # END
> > > END
> > > GRID
> > > LABELFORMAT "DD"
> > > # LABELFORMAT '%g°' # dec degrees with symbol
> > > # MINARCS 1
> > > MAXARCS 1
> > > MININTERVAL 30
> > > MAXINTERVAL 60
> > > # MINSUBDIVIDE 100
> > > MAXSUBDIVIDE 300
> > > # LABELFORMAT ’%7.0f m’ # nice if a projected SRS
> >
> > used
> >
> > > # MININTERVAL 20000
> > > # MAXSUBDIVIDE 2
> > > END
> > > END # Layer
> > >
> > > LAYER
> > > NAME "psc"
> > > CONNECTIONTYPE POSTGIS
> > > OPACITY 80
> > > STATUS ON
> > > METADATA
> > > "wms_title" "psc layer"
> > > END
> > > PROJECTION
> > > "init=epsg:4326"
> > > END
> > > CONNECTION "user=fum password=xyz dbname=foo
> >
> > host=localhost"
> >
> > > DATA "geocenter from scia_psc"
> > > FILTER "wert=1"
> > > TYPE POINT
> > > CLASS
> > > COLOR 250 10 10
> > > SYMBOL "circle"
> > > SIZE 7
> > > END
> > > END
> > > LAYER
> > > CONNECTIONTYPE POSTGIS
> > > NAME "nlc"
> > > OPACITY 80
> > > STATUS ON
> > > METADATA
> > > "wms_title" "nlc layer"
> > > END
> > > PROJECTION
> > > "init=epsg:4326"
> > > END
> > > CONNECTION "user=fum password=xyz dbname=foo
> >
> > host=localhost"
> >
> > > DATA "geocenter from scia_nlc"
> > > FILTER "wert=1"
> > > TYPE POINT
> > > CLASS
> > > COLOR 10 250 10
> > > SYMBOL "star"
> > > SIZE 7
> > > END
> > > END
> > > LAYER
> > > CONNECTIONTYPE POSTGIS
> > > NAME "stro3"
> > > OPACITY 80
> > > STATUS ON
> > > METADATA
> > > "wms_title" "stro3 layer"
> > > END
> > > PROJECTION
> > > "init=epsg:4326"
> > > END
> > > CONNECTION "user=fum password=xyz dbname=foo
> >
> > host=localhost"
> >
> > > DATA "geocenter from scia_stro3"
> > > FILTER "wert=1"
> > > TYPE POINT
> > > CLASS
> > > COLOR 10 10 250
> > > SYMBOL "circle"
> > > SIZE 7
> > > END
> > > END
> > > END # Ende Map
> > >
> > > _______________________________________________
> > > mapserver-users mailing list
> > > mapserver-users at lists.osgeo.org
> > > http://lists.osgeo.org/mailman/listinfo/mapserver-users
>
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