Images in web forms R6.0

Question

Leaving the client/server configuration and entering the true
three-tier solution should be easy, says oracle.
Then tell me how to
"Create a container class extending then VBean"
to invoke forms 6 to show a blob-stored jpg-file.
Has anyone done it already ?
I who only work with Developer tools and not yet have begun to
master the mystery of java (read JDeveloper) are stranded as of
now.
null

Answer 1

Found this somewhere on the web long back.
Not tested, never really had to use blob
create table demo
( id int primary key,
theBlob blob
create or replace directory my_files as '/export/home/tkyte/public_html';
declare
l_blob blob;
l_bfile bfile;
begin
insert into demo values ( 1, empty_blob() )
returning theBlob into l_blob;
l_bfile := bfilename( 'MY_FILES', 'aria.gif' );
dbms_lob.fileopen( l_bfile );
dbms_lob.loadfromfile( l_blob, l_bfile,
dbms_lob.getlength( l_bfile ) );
dbms_lob.fileclose( l_bfile );
end;
Now here is the package that can retrieve the pdf (or anything for that
matter. Just keep adding procedures that are named after the file type like
.doc, .pdf, .xls and so on. Some browsers really want the extension in the URL
to be "correct")
create or replace package image_get
as
procedure gif( p_id in demo.id%type );
end;
create or replace package body image_get
as
procedure gif( p_id in demo.id%type )
is
l_lob blob;
l_amt number default 30;
l_off number default 1;
l_raw raw(4096);
begin
select theBlob into l_lob
from demo
where id = p_id;
-- make sure to change this for your type!
owa_util.mime_header( 'image/gif' );
begin
loop
dbms_lob.read( l_lob, l_amt, l_off, l_raw );
-- it is vital to use htp.PRN to avoid
-- spurious line feeds getting added to your
-- document
htp.prn( utl_raw.cast_to_varchar2( l_raw ) );
l_off := l_off+l_amt;
l_amt := 4096;
end loop;
exception
when no_data_found then
NULL;
end;
end;
end;
/