Popup window for downloading a file

Question

Hi,
my dear users want me to do the impossible possible. My code generates an XML file which in time I displayed it in an Iframe in the application. When the standard popup window shows up, they can either Open, Save or Cancel it. This was allright.
Now they want the file in a new window displayed (when they press Open), because opening the file in the same window means they leave the application and after reading the file, they have to start the application again. I do it like this:
The code works perfect only with the Alert instructions. Once I delete it, the window is opened and inmediately closed. The popup window for the file does not show up.
Thanks for your ideas.

Answer 1

here is the code sample.
1. user clicks a button in the main page , which will generate xml and show the same in a new window.
page attributes
display_url     TYPE     STRING                                                                
file_mime_type     TYPE     STRING                                                                
flights     TYPE     FLIGHTTAB     Table for SFLIGHT
wf_xml     TYPE     XSTRING
layout:
<%@page language="abap" %>
<%@extension name="htmlb" prefix="htmlb" %>
<htmlb:content design="design2003" >
  <htmlb:page title=" " >
    <htmlb:form>
      <htmlb:textView text   = "Hello World!"
                      design = "EMPHASIZED" />
      <htmlb:button text    = "Press Me"
                    onClick = "myClickHandler" />
      <%
  IF  display_url IS NOT INITIAL.
      %>
      <script language="Javascript">
        window.open("<%= display_url%>").focus();
      </script>
      <%
  ENDIF.
      %>
    </htmlb:form>
  </htmlb:page>
</htmlb:content>
oninputprocessing code.
data: cached_response type ref to if_http_response.
data: guid type guid_32.
CALL TRANSFORMATION (`ID`)
            SOURCE flights   = flights[]
            RESULT XML wf_xml.
file_mime_type = 'text/xml' .
create object cached_response type cl_http_response exporting add_c_msg = 1.
  cached_response->set_data( wf_xml ).
  cached_response->set_header_field( name  = if_http_header_fields=>content_type
                                     value = file_mime_type ).
  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 into display_url.
  cl_http_server=>server_cache_upload( url      = display_url
                                       response = cached_response ).
  return.
2.user clicks a button in the main page , which will generate xml and present the user with a option to save locally or cancel. (in this case no additional browser window will be opened - only a popup and also the main page is not affected)
layout code:
same as option 1.
oninputprocesing code.
everything is same except change
file_mime_type = 'text/xml' .
to
file_mime_type = 'application/oct-stream' .
Note: wf_xml is of type xstring which holds the xml stream.
Regards
Raja
Message was edited by: Durairaj Athavan Raja