Index: openacs-4/packages/acs-tcl/tcl/utilities-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/utilities-procs.tcl,v
diff -u -r1.140.2.74 -r1.140.2.75
--- openacs-4/packages/acs-tcl/tcl/utilities-procs.tcl	22 Apr 2017 18:11:54 -0000	1.140.2.74
+++ openacs-4/packages/acs-tcl/tcl/utilities-procs.tcl	24 Apr 2017 15:53:45 -0000	1.140.2.75
@@ -550,6 +550,7 @@
     -entire_form:boolean
     -no_empty:boolean
     {-base}
+    -base_encode:boolean
     {-anchor}
     {-exclude {}}
     {-override {}}
@@ -694,6 +695,9 @@
     along with a question mark (?), if the query is non-empty. so the returned
     string can be used directly in a link. This is only relevant to URL export.
 
+    @option base_encode Decides whether argument passed as <code>base</code> option will be
+                        encoded by ad_urlencode_url proc
+
     @author Lars Pind (lars@pinds.com)
     @creation-date December 7, 2000
 } {
@@ -928,18 +932,15 @@
     if { $quotehtml_p } {
         set export_string [ns_quotehtml $export_string]
     }
-
+    
     # Prepend with the base URL
     if { [info exists base] && $base ne "" } {
-        if { [string first ? $base] > -1 } {
-            # The base already has query vars; assume that the
-            # path up to this point is already correctly encoded.
-            set export_string $base[expr {$export_string ne "" ? "&$export_string" : ""}]
-        } else {
-            # The base has no query vars
+        # if required, encode url part as well
+        if {$base_encode_p} {
             set base [ad_urlencode_url $base]
-            set export_string $base[expr {$export_string ne "" ? "?$export_string" : ""}]
         }
+
+        set export_string $base[expr {[string first ? $base] > -1 ? "&" : "?"}]$export_string
     }
     
     # Append anchor