Display blob file

Question

Quick Question:
Is it possible to display a file stored in an oracle blob field directly to the browser, without first writing it to the server?
My Situation:
I need to display the file associated with a given record. When the user selects the record I write the associated file to the server first as "default.pdf" and then display it from there.
When another record is selected, the browser doesn't recognize it as new (because it overwrites the old "default.pdf" maintaining the same name) and displays the old cached file.
I can give separate names to the files but this defeats the purpose of storing them in the database because then you have two copies of each, one in the db and the other on the server.
I have tried to delete the file after displaying it but it deletes before the response.sendRedirect() command and therefore has no file to display.
If anyone has the answer to the above question or another solution (perhaps to avoid the cache) it would be greatly appreciated.
Thanks,
Garbo Dumpster (I will post the code if my explanation was not clear)

Answer 1

Following is the code sample:
Blob aBlob=null;
aBlob= (Blob)rs.getBlob("BLOBCOLUMNNAME");
long bloblength = aBlob.length();
long offset = 1;
int lenread=0;
int buffersize=1024;
int size;
InputStream is = aBlob.getBinaryStream();
byte[] buffer = new byte[buffersize];
response.reset();
response.setContentType("whatever"); //can store it in database and retrieve
ServletOutputStream out=response.getOutputStream();
response.setHeader("Content-Disposition", "attachment; filename=\"" + filename + "\""); //filename can stored in database and retrieved
for (long pos = 0;pos<bloblength;pos+=buffersize)
lenread=is.read(buffer,0,buffersize);
if (lenread<buffersize)
size=lenread;
else
size=buffersize;
out.write(buffer,0,size);
}