Image reading problem

Question

hi,
i'm reading a gif image from an input stream like this:
InputStream input = document.getBlobProperty(property).getInputStream();
          byte[] theBytesTemp = new byte[1048576];
          int length = input.read(theBytesTemp);
          byte[] theBytes = new byte[length];
          System.arraycopy(theBytesTemp, 0, theBytes, 0, length);
          BufferedImage originalImage = new ImageParsing().getBufferedImage(theBytes);
          input.close();
(the document.getBlobProperty(property).getInputStream();) is provided by the CMS we use and just returns an input stream. my problem is that the BufferedImage originalImage = new ImageParsing().getBufferedImage(theBytes); (that's part of the sanselan imaging library) throws an exception (java.io.IOException: GIF: corrupt block) for larger images (not sure about the size in detail. images about 10K seem to work, images of about 50K don't).
Any ideas?
Marco

Answer 1

Hello, Im having the same problem, but im getting the data from a database, and try to output via JSP and getting a currupted image,
How can i implement this code database binary data, since i cant get the data into input stream.
eg:
* how to copy data in the data field as byte[] to the InputStream,
* how to use ImageParsing().getBufferedImage(imageBytes); which i can't able to find the class for it,
     ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
     int bufferLength = 1024*1024;
     byte[] buffer = new byte[bufferLength];
     int length = 0;
     /* Im having problem of getting the data to the input stream on below line */
     InputStream input = af.getImg();
     while ((length = input.read(buffer)) != -1) {
          byteArrayOut.write(buffer, 0, length);
     input.close();
     byteArrayOut.close(); //Has no real effect
     byte[] imageBytes = byteArrayOut.toByteArray();
     /* cant find the class for ImageParsing() */     BufferedImage originalImage = new ImageParsing().getBufferedImage(imageBytes);
     OutputStream out = response.getOutputStream();
     /* cant write BufferedImage to the out put stream */     out.write( imageBytes );
     response.flushBuffer();          You shouldn't try to read all the bytes at one time
like that, there are no quarantees that the read
opperation will fill the array or read all the bytes
in the inut stream (this the need to return the
length read).
Instead, put the read into a loop, reading into a
buffer, then append the buffer onto a byte array
output stream...
ByteArrayOutputStream byteArrayOut = new
ByteArrayOutputStream();
int bufferLength = 1024*1024;
byte[] buffer = new byte[bufferLength];
int length = 0;
InputStream input = ...
while ((length = input.read(buffer) != -1)
byteArrayOut.write(buffer, 0, length);
input.close();
byteArrayOut.close(); //Has no real effect
byte[] imageBytes = byteArrayOut.toByteArray();
BufferedImage originalImage = new
ImageParsing().getBufferedImage(imageBytes);