/path/to/read_file.html

##</code><code>##

   directory 'path' needs to grant read and execute privs
                    to the webserver user, and
   directory 'to' needs to grant read and execute privs
                  to the webserver user, and
   file read_file.html needs to grant read privs to the
        webserver user.

##</code><code>##

   chmod o+rx /path
   chmod o+rx /path/to
   chmod o+r /path/to/read_file.html