Index: openacs-4/packages/acs-tcl/tcl/request-processor-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/request-processor-procs.tcl,v
diff -u -r1.153.2.53 -r1.153.2.54
--- openacs-4/packages/acs-tcl/tcl/request-processor-procs.tcl	29 Mar 2022 08:50:53 -0000	1.153.2.53
+++ openacs-4/packages/acs-tcl/tcl/request-processor-procs.tcl	1 Apr 2022 13:54:53 -0000	1.153.2.54
@@ -463,6 +463,9 @@
         }
         ns_setexpires $expireTime
     }
+    set mime_type [ns_guesstype $path]
+    ::security::csp::add_static_resource_header -mime_type $mime_type
+
     ns_returnfile 200 [ns_guesstype $path] $path
     return filter_return
 }