Uploading and downloading blobs without wwv_flow_files

Question

Hi,
I am currently working on oracle 10g database and application express.
i went throu the material to upload and download images, pdf from a htmldb book.
it was excellent material. but the book only gave example about loading and downloading images, pdf through flows_files.wwv_flow_files view.
it seemed like we can only d/l the pdf, images and display on htmldb report only throu flows_files.wwv_flow_files view, as in the case of the script below
select
   wff.id, htf.anchor( 'p?n=' || wff.id, wff.filename ) filename_1,
   wff.filename filename_2, ed.abstract abstract
from
   wwv_flow_files wff, easy_document ed
where
   wff.name = ed.name;but is there a way to load and download images, pdfs from my own tables without the involvement of flows_files schema.
if then how can i modify the above code to get the pdf from the following table
TableA (vessel number, cruise number, pdf blob)
here for every (vessel, cruise) combination there is a pdf.
how can i get this pdf displayed in my htmldb report.
Can someone guide me please.
Thanks,
Philip.

Answer 1

Hi,
I tried the document link you gave and it looks like, i can directly download pdfs from my own tables without needding to upload to wwv_flow_files_objecst$ table.
i modified the procedure in the document accroding to my requirements and it worked.
in my page i show a grid with the parameters and the pdf documentname as download link.
when i click on the link a popup window with the option to save or open comes up.
but the popup window shows the filename as my procedure name through which i pass the id for the pdf document instaed of the filename which is shown as download link on the page.
How can i change this popup window filename to the default file name shown in the download link.
so that everytime i select the parameters, the page shows the pdf filename as link and on clicking the link the popup window should be able to show the same name shown as link.
i think this can be set either at the procedure level or at the page level.
and this is the following contents of the procedure
--        SET UP HTTP HEADER
               -- use an NVL around the mime type and
               -- if it is a null set it to application/octect
               -- application/octect may launch a download window from windows
               owa_util.mime_header( nvl('PDF','application/octet'), FALSE );
                -- set the size so the browser knows how much to download
                 htp.p('Content-length: ' || B_LEN);
                -- the filename will be used by the browser if the users does a save as
-- htp.p('Content-Disposition:  attachment; filename="'||'CR'||VES||CRU||'.PDF'|| '"');
                -- close the headers           
                owa_util.http_header_close;
                -- download the BLOB
                wpg_docload.download_file( BREP );and this is what i did at the page level. for that particular column i went to link option and the foll is what i gave:
Link Text: CR#VESSEL##CRUISE#.PDF
Link Attributes: target="_blank"
URL: #OWNER#.PROC_DOWNLOAD_PDFS?V=#VESSEL#&C=#CRUISE#
Here the link text is the filename that i wanted to show when saving the file.
Can someone guid eme please.
Thanks,
Philip.