[Mapserver-users] Variable substitution 4.0.1

[Johansen Per Henrik]

Thanks for the reply.

But using map_reference_image does not seem to work either. I have tried to look at the source code for 4.0.1 and to figure out what happens. mapserv recognize that I pass it a map_ variable through CGI, but everything seem to end in the function loadReferenceMapString() in mapfile.c. The switch(msyylex()) statement never seem to match any of the cases (it triggers the default, to do nothing). The same happens when I try to set map_reference_extent, the default case is triggered.

Maybe I am missing something (it is late over here), I have also peeked at how map_web_imagepath (loadWebString()) is handled (which works btw), and I can not spot any major differences at the moment.

Could this be a bug in the lexer/parser?

The function loadReferenceMap(), which is used to read from the mapfile works though.

Per Henrik

> -----Original Message-----
> From: Steve Lime [mailto:steve.lime at dnr.state.mn.us]
> Sent: 6. januar 2004 18:41
> To: mapserver-users at lists.gis.umn.edu; Johansen Per Henrik
> Subject: Re: [Mapserver-users] Variable substitution 4.0.1
> 
> 
> Variable substitution is only available in a couple of instances where
> you might like to alter a portion of a parameter but not the whole
> thing. This basically amounts to FILTERs and EXPRESSIONs and
> CONNECTIONs. The other method you mention should be used instead. I
> suspect that what's happening is that the map file parser 
> reads the file
> first and then augments it using substitutions (as limited 
> above) or via
> the other method, and the string you've got for image is 
> indeed illegal.
> To fix?
> 
> 1) Don't use the substitution, use map_reference_image instead.
> 2) Change your mapfile like so:
> 
> REFERENCE
>         IMAGE "passed in via URL"
>         ...
> END
> 
> Steve
> 
> >>> "Johansen Per Henrik" <phj at norgit.no> 1/6/2004 10:05:11 AM >>>
> Hi,
> 
> I am a bit puzzled with the variable substition features in Mapserver.
> It seems to work fine in some cases, like in the layer 
> object, but when
> I try to use this functionality in the reference object, I 
> get a parser
> error. getString(): Symbol definition error. Parsing error near (%)
> I use it like this to use a dynamically created reference image:
> 
> REFERENCE
>         IMAGE %refimage%
>         ...
> END
> 
> I have also tried to overwrite the IMAGE value by referencing it as
> map_reference_image=... in the cgi call, but with the same result. 
> Am I right to suspect that the REFERENCE objectdoes not support
> variable substitution and cgi referencing?
> 
> Regards,
> 
> Per Henrik
> 
> --
> Interconsult NORGIT AS
> Per Henrik Johansen
> Systemutvikler/Systems developer
> Tel: + 47 69 394805   Mob: + 47 950 71822
> icq: 4975767
> Web: http://www.norgit.no 
> 
> 
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> 

--
Interconsult NORGIT AS
Per Henrik Johansen
Systemutvikler/Systems developer
Tel: + 47 69 394805   Mob: + 47 950 71822
icq: 4975767
Web: http://www.norgit.no