[Chameleon] parameter substitution using mapscript

[John Pulles]

Hi list,

In a Chameleon site where parameter substition was needed, the 
chameleon-2.4.1-20060906 code was tweaked to allow parameter 
substitution by replacing the parameter strings in the session map file 
(see the attached patch file).

Since probably more people are/were having this problem, I was wondering 
if a more standard solution using Chameleon is available? That would be 
preferable to patching the chameleon code.

Regards,
John.

-- 
John Pulles
-------------------------------------
Geodan IT b.v.
Buitenhaven 27-A
5211TP 's-Hertogenbosch
-------------------------------------
Tel: +31 (0)73 - 692 5151
Fax: +31 (0)73 - 692 5150
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Postadres / mailing address
President Kennedylaan 1
1079MB Amsterdam
-------------------------------------
E-mail:  john.pulles at geodan.nl
Website: http://www.geodan.nl
-------------------------------------

-------------- next part --------------
Index: map_session.php
===================================================================
--- map_session.php	(revision 2)
+++ map_session.php	(working copy)
@@ -292,7 +292,32 @@
             }
             else
             {
-            $this->oMap->save( $szMapFile );
+                $this->oMap->save( $szMapFile );
+            
+                /** begin of parameter subsitution hack ***/
+                // after generated save: rewrite hack (post_processor ;-))
+
+                if (!$handle = fopen($szMapFile, 'r'))
+                {
+                    $this->error( 0, "Cannot open file ($szMapFile)" );
+                }
+                $str = fread($handle, filesize($szMapFile));
+                $str = ereg_replace ("%dbname%",$_SESSION["userinfo"]["dbname"], $str);
+                $str = ereg_replace ("%username%",$_SESSION["userinfo"]["username"],  $str);
+                fclose($handle);
+
+                if (!$handle = fopen($szMapFile, 'w')) {
+                    $bResult = false;
+                    $this->error( 0, "$szMapFile is not writeable" );
+                }
+
+                if (fwrite($handle, $str) === FALSE)
+                {
+                    $this->error( 0, "$szMapFile is not writeable" );
+                    $bResult = false;
+                }
+                fclose($handle);
+                /** end of parameter subsitution hack ***/
             }
         }
         // log successful save