This document is about how to enhancement our OData service  – Download File.

Currently base on training material, we usually redefine GET_STREAM method and pass mime type and stream value to the result.

ls_stream–mime_type = output–return–MIME_TYPE .
ls_stream-value = output–return–DOCUMENT_STREAM .
copy_data_to_ref( EXPORTING is_data = ls_stream
CHANGING  cr_data = er_stream ).

This works, however the problem is if you trigger the service in Chrome. You can only get a document with named ‘entity’.

Problem

• What if customer has already stored file name in ECM or in Database? They want to see the real name.
• What if customer don’t want to direct download, they may want to review the file before download.

Solution

Solution to this is to set a header to http framework. I attached code below.

DATA ls_lheader TYPE ihttpnvp.
“DATA lv_filename TYPE string.
“lv_filename = escape( val = lv_filename format = cl_abap_format=>e_url ).
ls_lheader–name = ‘Content-Disposition’.
ls_lheader–value = ‘outline; filename=”Mobile.pdf”;’.
set_header( is_header = ls_lheader ).

ls_stream–mime_type = output–return–MIME_TYPE .
ls_stream–value = output–return–DOCUMENT_STREAM .
copy_data_to_ref( EXPORTING is_data = ls_stream
CHANGING  cr_data = er_stream ).

Let’s test the result now:

If customer want to preview the document instead of directly download, please change code as below.

ls_lheader–value = ‘inline; filename=”Mobile.pdf”;’.

Let’s test the result:

A new page was opened for preview, you can right click and choose to save. File name ‘Mobile.pdf’ comes up.