Displaying BLOB from Database

Question

Hi All,
I am trying to preview a 'jpeg' image which is stored in my database. The images get inserted into the DB without any trouble, but on retrieving the images I get 'broken links' to the images. Please Help:
PROCEDURE GET_TEAM_LOGO(team_name VARCHAR2)
AS
vblob BLOB;
buf RAW(32000);
buf_size INTEGER := 32000;
offset INTEGER := 1;
len NUMBER;
mime_type VARCHAR2(30);
BEGIN
auth_proc;
-- get image_data and its mime type from the database
WHERE LOGO_ID=position;
htp.p('This is the value of team:'|| team_name ||'<br>');
SELECT logo_image, logo_type INTO vblob, mime_type
FROM LOGO_TABLE
WHERE group_name = team_name;
-- set the mime type for the http protocol
owa_util.mime_header('image/jpeg');
-- read the data with htp package
len:=dbms_lob.getlength(vblob);
WHILE offset < len LOOP
dbms_lob.read(vblob,buf_size,offset,buf);
htp.prn(utl_raw.cast_to_varchar2(buf));
offset:=offset+buf_size;
END LOOP;
-- check for exception
EXCEPTION
WHEN OTHERS THEN
htp.p(SQLCODE || SQLERRM);
END;
Thanks,
Peter

Answer 1

Hi!
I've used this code successfylly in a mod_plsql procedure.
Can be used as following:
htp.img('http://yourhost:port/<dad>/image.get_image?p_picture_id=123,'"right"',null,null,'width=107 height=66 border=1');
procedure get_image
( p_picture_id number
) as
cursor c_pict
( b_picture_id number
) is
select pict.picture -- blob column
, pict.format -- Gif/Jpeg etc.
from pictures pict
where pict.picture_id = b_picture_id
r_pict c_pict%rowtype;
v_blob BLOB;
v_amt NUMBER := 30;
v_off NUMBER := 1;
v_raw RAW(4096);
begin
open c_pict(p_picture_id);
fetch c_pict into r_pict;
if c_pict%notfound
then
close c_pict;
else
close c_pict;
owa_util.mime_header('image/'||r_pict.format);
begin
loop
dbms_lob.read(r_pict.picture,v_amt,v_off,v_raw);
htp.prn(utl_raw.cast_to_varchar2(v_raw));
v_off := v_off+v_amt;
v_amt := 4096;
end loop;
exception
when no_data_found
then
null;
end;
end if;
end get_image;