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/** * A OutputStream which can be used to write Images * with the ImageIO in servlets. */ public class MyImageIOOutputStream extends OutputStream { private OutputStream out; private volatile boolean isActive = true; public MyImageIOOutputStream(OutputStream out) { this.out = out; } @Override public void close() throws IOException { if (isActive) { isActive = false; // deactivate try { out.close(); } finally { out = null; } } } @Override public void flush() throws IOException { if(isActive) { out.flush(); } // otherwise do nothing (pevent polluting the stream) } @Override public void write(byte[] b, int off, int len) throws IOException { if (isActive) out.write(b, off, len); } @Override public void write(byte[] b) throws IOException { if (isActive) out.write(b); } @Override public void write(int b) throws IOException { if (isActive) out.write(b); } } |
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