PDF displayed in BSP being cached on pc

Question

I have used some code for a couple of years that I found on sdn, probably in an old Thomas Jung blog, to display a PDF document in a BSP:
    CREATE OBJECT cached_response
      TYPE
        cl_http_response
      EXPORTING
        add_c_msg        = 1.
    l_pdf_len = XSTRLEN( l_pdf_xstring ).
    cached_response->set_data( data   = l_pdf_xstring
                        length = l_pdf_len ).
    cached_response->set_header_field(
          name  = if_http_header_fields=>content_type
                      value = 'application/pdf' ).
    cached_response->set_status( code = 200 reason = 'OK' ).
    cached_response->server_cache_expire_rel( expires_rel = 180 ).
    CALL FUNCTION 'GUID_CREATE'
      IMPORTING
        ev_guid_32 = guid.
    CONCATENATE runtime->application_url '/' guid '.pdf'
    INTO me->query->display_url.
    cl_http_server=>server_cache_upload(
                    url      = me->query->display_url
                          scope    = ihttp_inv_global
                         response = cached_response ).  
The problem is that a copy of the pdf is being cached on the user's pc in their Temporary Internet Files.  We now have an application with sensitive information displayed.  We cannot have a copy of the document stored anywhere on the user's pc.  Is there another method than the above to handle a pdf in a BSP without caching a copy?

Answer 1

Hi,
Refer the below codes and implement the same , it'll work for you and it's working for me...
Fill HTTP request
   mresponse->set_header_field( name  = 'content-type'
                               value = 'application/pdf' ).
some Browsers have caching problems when loading PDF format
   mresponse->set_header_field(
                      name  = 'cache-control'
                      value = 'max-age=0' ).
start PDF viewer either in the Browser or as a separate window
   if pdf_in_browser is initial.
     mresponse->set_header_field(
                        name  = 'content-disposition'
                        value = 'attachment;filename=Ordform.pdf' ).
   endif.
   mresponse->set_status( code = 200 reason = 'OK' ).
   mresponse->server_cache_expire_rel( EXPIRES_REL = 60 ).
finally display PDF format in Browser
DATA:      l_pdf_len      type i.
   l_pdf_len = xstrlen( l_pdf_xstring ).
   mresponse->set_data( data   = l_pdf_xstring
                       length = l_pdf_len ).
   navigation->response_complete( ).
   return.
Thnx
Suriya