Redirect From PL/SQL Procedure

Question

Hi
I hope this is a relatively straightforward question, but I am having trouble getting a page redirect to work from a PL/SQL procedure.
I call the following procedure:-
CREATE OR REPLACE PROCEDURE DOWNLOAD_FILE(p_id NUMBER) AS
v_mime VARCHAR2(200);
v_length NUMBER;
v_file_name VARCHAR2(2000);
lob_loc BLOB;
v_session VARCHAR2(100);
BEGIN
v_session := v('SESSION');
SELECT MIME_TYPE,
FILE_CONTENT,
FILE_NAME,
DBMS_LOB.GETLENGTH(FILE_CONTENT)
INTO v_mime,
lob_loc,
v_file_name,
v_length
FROM SRGSUP_UPLOADED_FILES
WHERE ID = p_id;
owa_util.mime_header(nvl(v_mime,'application/octet'),FALSE);
htp.p('Content-length: ' || v_length);
htp.p('Content-Disposition: attachment; filename="' || v_file_name || '"');
owa_util.http_header_close;
wpg_docload.download_file(lob_loc);
EXCEPTION
WHEN NO_DATA_FOUND THEN
htp.p('Location: f?p=107:30');
END DOWNLOAD_FILE;
From the following HTML Expression in column formatting of a report:-
#FILE_NAME#: [ <a href="#OWNER#.DOWNLOAD_FILE?p_id=#FILE_ID#">Download</a> ]
When the table SRGSUP_UPLOADED_FILES contains the relevant document the file download works perfectly. However, if there is no file present I wanted the page to redirect back to itself. Instead it goes to the login page.
Initially I thought it was losing the session details so I tried "htp.p('Location: f?p=107:30:'||v('SESSION'));" but this made no difference.
Any help would be appreciated.
Thanks
Chris
Message was edited by:
chrisjcoe

Answer 1

Hi
<p>I hope this is a relatively straightforward question, but I am having trouble getting a page redirect to work from a PL/SQL procedure. </p>
<p>I call the following procedure:- </p>
CREATE OR REPLACE PROCEDURE DOWNLOAD_FILE(p_id NUMBER) AS
v_mime VARCHAR2(200);
v_length NUMBER;
v_file_name VARCHAR2(2000);
lob_loc BLOB;
BEGIN
  SELECT MIME_TYPE,
         FILE_CONTENT,
         FILE_NAME,
         DBMS_LOB.GETLENGTH(FILE_CONTENT)
  INTO v_mime,
       lob_loc,
       v_file_name,
       v_length
  FROM SRGSUP_UPLOADED_FILES
  WHERE ID = p_id;
  owa_util.mime_header(nvl(v_mime,'application/octet'),FALSE);
  htp.p('Content-length: ' || v_length);
  htp.p('Content-Disposition: attachment; filename="' || v_file_name || '"');
  owa_util.http_header_close;
  wpg_docload.download_file(lob_loc);
  EXCEPTION WHEN NO_DATA_FOUND THEN
  htp.p('Location: f?p=107:30');
END DOWNLOAD_FILE;
<p>From the following HTML Expression in column formatting of a report:- </p>
[pre]
"#FILE_NAME#: [ <*a h*ef="#OWNER#.DOWNLOAD_FILE?p_id=#FILE_ID#">Download</*a> ] "I've only put an "*" in <*a and </*a> to stop it changing into a url.
<p>When the table SRGSUP_UPLOADED_FILES contains the relevant document the file download works perfectly. </p>
<p>However, if there is no file present I wanted the page to redirect back to itself. Instead it goes to the login page. </p>
<p>Initially I thought it was losing the session details so I tried "htp.p('Location: f?p=107:30:'||v('SESSION'));" but this made no difference. </p>
<p>Any help would be appreciated. </p>
<p>Thanks </p>
<p>Chris</p>