How to print a pl/sql raw or BLOB to html page with htp.p command

Question

Hi!
I have a jpeg image I retrieved from the OID and it is stored in an DBMS_LDAP.BINVAL_COLLECTION, which is supposed to be similar to a BLOB or PL/SQL raw collection. What I want to do is to print it to my portal page. I have been using htp.p to print all the other values such as name, department etc, and the only thing I can't get out to the page is the image. How do I do this? I suppose I can just declare a variable of the type BLOB, and give it the binary value I have in the BINVAL_COLLECTION, but then how do I get it to my html code? Do I have to convert it to something, or use some function. I don't know much pl/sql so detailed instructions would be very helpful. Thank you
/Marie

Answer 1

I tried that, but I get the error "Wrong number or types of arguments" in the Read method. See my code below:
PROCEDURE read_image(p_photo DBMS_LDAP.BINVAL_COLLECTION)
AS
     src_lob blob;
     buffer raw(2048);
     amt BINARY_INTEGER := 2048;
     pos INTEGER := 1;
     doctype number;
     BEGIN
     owa_util.mime_header( 'image/bmp', false );
     owa_util.http_header_close;
     -- the query
     --select into src_lob from where ;
     LOOP
--THIS IS WHERE I CHANGE THE BLOB FOR MY BINVAL_COLLECTION, BUT GET AN ERROR
     DBMS_LOB.READ (p_photo, amt, pos, buffer);
     pos := pos + amt;
     htp.prn(utl_raw.cast_to_varchar2(buffer));
     END LOOP;
     exception when others then
     NULL;
     END;
Is there something wrong with this code, or else how do you mean I shold just replace the blob whith the DMBS_LDAP.BINVAL_COLLECTION
/Marie