Show a blob( pdf ) from db-table in the clients browser/ web.show_document

Question

my env:
Database R11_2 on one windows-host-machine
AS 10 g on another windows-host-machine
I can show files in Forms10g from inside the AS with web.show_document,
that works fine
but now I want to show a ( pdf or text ) File from a BLOB in a Table inside in the Database
to the Browser running in Forms on AS,
I do not want to create a extra Form for this reason, but want to show it in browser - windows
( how ) can I use web.show_document against a URL on the Database R11 ?
what other tool , java ?
regards

Answer 1

Easiest way is probably to use mod_plsql and wpg_docload.download_file. If you retrieve the blob content from some table, than you can show it with a generic procedure like:
procedure show_webdoc(io_blob          in out nocopy blob
                     ,i_mimetype       in varchar2
                     ,i_filename       in varchar2)
is
begin
   if dbms_lob.getlength(io_blob) >0 then
      owa_util.mime_header(nvl(i_mimetype,'application/octet'),false);
      htp.p('Content-length: ' || dbms_lob.getlength(io_blob));
      htp.p('Content-Disposition:  attachment; filename="'||i_filename|| '"');
      owa_util.http_header_close;
      wpg_docload.download_file(io_blob);
   end if;
end show_webdoc;