Error while opening PDF file downloaded from database Blob column

Question

Hi All,
I am working on jdev 11.1.1.4.0.
In my use-case I am using filedownload Actionlistner on a link to get the PDF file stored in the database in blob field. These files are being uploaded from other use-case in adf only.
After getting the dialog box to open/save/cancel for the PDF file when i click on open then i am getting an error *'Adobe Reader could not open 'abc.pdf' because it is either not a supported file type*
or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly docoded)' for some files , and to my surprise I am able to open some files.
When I open these PDF files separately from desktop I am able to view the content of each and every file in adobe reader.
I dont know where the problem exactly lies , while uploading/downloading the file . Any ideas/thoughts to resolve this issue?
Thanks
Kanika

Answer 1

Thanks a lot Timo...!!!
I checked the PDF file downloaded directly from the blob column in DB, there only it is corrupted so must be the problem in uploading the file. I am checking the code line by line,, but no problem in setting the file content type,size etc.
Here is the code snippet ..
byte[] buff;
buff = new byte[(int)length]; -- Length is the file size
int bytesRead = is.read(buff);
for (int i = 0; bytesRead < buff.length; i++) {
// int b = is.read();
int b = is.read();
if (b == -1)
break;
buff[i] = (byte)b;
BlobDomain blobDomian = new BlobDomain((buff));
TestVORow = (TestVORow Impl)TestVO.createRow();
if(blobDomian != null) {
TestVORow.setAttachment(blobDomian);
am.getTransaction().commit();
This seems to be Ok to me..the same issue, file is still corrupting.
Any thoughts from your side ???
Thanks
Kanika
The problem is resolved.
Changes made are instead of
InputStream is;
used ... BufferedInputStream bis ;
and after
for (int i = 0; bytesRead < buff.length; i++) {
// int b = bis.read();
int b = bis.read();
if (b == -1)
break;
buff[i] = (byte)b;
bis.close(); // use this close bufferedInput Stream.
Able to open each and every file now..Thanks for your suggestions Timo and Frank.
Edited by: Kanika on Mar 6, 2012 3:15 AM