Upload and ZIP a file (BLOB)

Question

Hi
I am trying to upload a file and zip it before saving it to the table. I am using 3.2 and 11g. I know of UTL_COMPRESS but that's not the format I am looking for. I am looking for a .zip file . I also tried this solution (http://joelkallman.blogspot.com/2008/04/zip-it.html) but it is not working for me. when I run this process it takes a long time and finally is throwing a not responding error. I dont't know if it is the oracle 11g version that is causing this solution not to work. Please advice.
This is the code I am running based on the above java proc in the link
DECLARE
l_blob BLOB;
l_result INTEGER;
n_field NUMBER;
BEGIN
SELECT MAX (id)
INTO n_field
FROM apex_application_files
WHERE name = attachment_name;
l_result := ESCRMGR.ziplobs ('SELECT id, blob_content FROM apex_application_files'||
'WHERE id = n_feild',
l_blob);

Answer 1

Are you running add1file, and then finish_zip before inserting?I am doing this.
Also, make sure you change the dbms_lob.append line in add1file to dbms_lob.copy (2nd last post in that other thread)I have made these changes teh very frist time I executed the procs.
Does the PDF open after you download it from your table?Yes, I am able to open the PDF.
But, as you mentioned mimetype may be the problem. While I am storing the file into my table, I am loading the output file from finish_zip, but I am storing the mimetype from the apex_application_files table. So, i am stroing PDF as my mime type. Then fro download I am using the followwing proc
CREATE OR REPLACE PROCEDURE ESCRMGR.download_my_file(p_file in number) AS
v_mime VARCHAR2(48);
v_length NUMBER;
v_file_name VARCHAR2(2000);
Lob_loc BLOB;
BEGIN
SELECT attachment_type, attachment,attachment_name ,DBMS_LOB.GETLENGTH(attachment)
INTO v_mime,lob_loc,v_file_name,v_length
FROM rs_attachments
WHERE attachment_id = p_file;
-- 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(v_mime,'application/octet'), FALSE );
-- set the size so the browser knows how much to download
htp.p('Content-length: ' || v_length);
-- the filename will be used by the browser if the users does a save as
htp.p('Content-Disposition: attachment; filename="'||replace(replace(substr(v_file_name,instr(v_file_name,'/')+1),chr(10),null),chr(13),null)|| '"');
-- close the headers
owa_util.http_header_close;
-- download the BLOB
wpg_docload.download_file( Lob_loc );
end download_my_file;
So, from the above proc I understand that it is taking PDF as the mimetype and that is why it is not displaying as .ZIP
correct me if I am wrong. I will try to work on this. But please let me know your inputs.