RFC 2936 (rfc2936) - Page 4 of 13

HTTP MIME Type Handler Detection

RFC 2936            HTTP MIME Type Handler Detection      September 2000


4. ActiveX and the Windows Registry

   If running on Microsoft Windows Internet Explorer version 3 or 4, it
   is necessary to query the Windows Registry to determine local MIME
   type support.  Although these broswers support JavaScript, in v3 the
   mimeTypes array is not present and in v4 the mimeTypes array is
   present but always empty.  For example, executing the following code
   will test for support of the IOTP types:

   CString iotpString, xiotpString;
   char* Key, Keyx;

      int rc, rcx;
      iotpString =
   "SOFTWARE\Classes\MIME\Database\Content Type\application/iotp";
      xiotpString =
   "SOFTWARE\Classes\MIME\Database\Content Type\application/x-iotp";
      Key = iotpString.GetBuffer(1);
      Keyx = xiotpString.GetBuffer(1);
      rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, Key, 0, KEY_READ, hDefKey);
      rcx = RegOpenKeyEx(HKEY_LOCAL_MACHINE, Keyx, 0, KEY_READ, hDefKey);
   if ( ( rc  == ERROR_SUCCESS ) || ( rcx == ERROR_SUCCESS ) )
    {
    // IOTP Handler exists
    }
   else
    {
    // No IOTP Handler
    }

   NOTE: ActiveX is a trademark of Microsoft and was originally called
   Sweeper.

5. ECML, The Electronic Commerce Modeling Language

   A industry group has recently proposed a standard for fields used in
   electronic commerce.  This fields allow "wallet" software acting for
   the consumer to convey standardized information to a merchant,
   including information as to what payment related protocols are
   supported at the customer site.  See [ECML].











Eastlake, et al.             Informational