Setting a session ID in PL/SQL

Question

Hello
I am currently trying to download the contents of a clob into notepad from Apex. So I have a link like this to call the package on the database:
<a href="#OWNER#.species_upload.download_error_txt?p_session_id=&APP_SESSION.">Download to Notepad</a> And as you can see I am passing in the session id as I want to use the v function to get at some application items. Here is the code for the function:
   PROCEDURE download_error_txt(p_session_id IN NUMBER)
   IS
   v_err_filename               VARCHAR2(1000);
   v_err_clob                   CLOB;
   v_err_user                   VARCHAR2(100);
   BEGIN
        --First of all we will get the file name and append error to it.
        wwv_flow_api.set_security_group_id(2178813262660915);
        APEX_CUSTOM_AUTH.set_session_id(p_session_id);
        v_err_filename := v('F157_SPECIES_FILE_NAME');
        v_err_filename := SUBSTR(v_err_filename,0,LENGTH(v_err_filename) -4)
                       || '_error.txt';
        --We will convert all the <br /> tags in the clob to chr10||chr13 to
        --force a new line feed in windows.       
        v_err_clob := V('F157_SPECIES_ERROR');
        v_err_clob := REPLACE(v_err_clob, '<br />', chr(13));
        v_err_user := V('APP_USER');
        select v('APP_USER') INTO v_err_user from dual;
        --Set the MIME type.
        OWA_UTIL.MIME_HEADER('text/plain',FALSE);
        --Set the name of the file
        HTP.p('Content-Disposition: attachment; filename="'||v_err_filename||'"');
        --Close the HTTP header,
        OWA_UTIL.HTTP_HEADER_CLOSE;
        HTP.p('Below is a detailed list of why the '|| v_err_filename || 'did not upload.');
        HTP.p(chr(13));
        HTP.p('Paul Test');
        HTP.p(chr(13));
        HTP.p(v_err_user);
        HTP.p(chr(13));
        HTP.p(v_err_clob);
   END download_error_txt;Now it opens up the notepad fine and displays the values that I have hardcoded but none of the values that the v function returns. As you can see I am using set_session_id in my code but I don't think that is enough.
So thats why I am wondering if I can tell this procedure what apex session it is and get the values from that session.
Cheers,
Paul.

Answer 1

If you use the application process approach like in this example (at the end), you can get the session id within the package using v('APP_SESSION').
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
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