--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/net/httpserver/ChunkedOutputStream.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,160 @@
+/*
+ * Copyright 2005-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.net.httpserver;
+
+import java.io.*;
+import java.net.*;
+import com.sun.net.httpserver.*;
+import com.sun.net.httpserver.spi.*;
+
+/**
+ * a class which allows the caller to write an arbitrary
+ * number of bytes to an underlying stream.
+ * normal close() does not close the underlying stream
+ *
+ * This class is buffered.
+ *
+ * Each chunk is written in one go as :-
+ * abcd\r\nxxxxxxxxxxxxxx\r\n
+ *
+ * abcd is the chunk-size, and xxx is the chunk data
+ * If the length is less than 4 chars (in size) then the buffer
+ * is written with an offset.
+ * Final chunk is:
+ * 0\r\n\r\n
+ */
+
+class ChunkedOutputStream extends FilterOutputStream
+{
+    private boolean closed = false;
+    /* max. amount of user data per chunk */
+    final static int CHUNK_SIZE = 4096;
+    /* allow 4 bytes for chunk-size plus 4 for CRLFs */
+    final static int OFFSET = 6; /* initial <=4 bytes for len + CRLF */
+    private int pos = OFFSET;
+    private int count = 0;
+    private byte[] buf = new byte [CHUNK_SIZE+OFFSET+2];
+    ExchangeImpl t;
+
+    ChunkedOutputStream (ExchangeImpl t, OutputStream src) {
+        super (src);
+        this.t = t;
+    }
+
+    public void write (int b) throws IOException {
+        if (closed) {
+            throw new StreamClosedException ();
+        }
+        buf [pos++] = (byte)b;
+        count ++;
+        if (count == CHUNK_SIZE) {
+            writeChunk();
+        }
+    }
+
+    public void write (byte[]b, int off, int len) throws IOException {
+        if (closed) {
+            throw new StreamClosedException ();
+        }
+        int remain = CHUNK_SIZE - count;
+        if (len > remain) {
+            System.arraycopy (b,off,buf,pos,remain);
+            count = CHUNK_SIZE;
+            writeChunk();
+            len -= remain;
+            off += remain;
+            while (len > CHUNK_SIZE) {
+                System.arraycopy (b,off,buf,OFFSET,CHUNK_SIZE);
+                len -= CHUNK_SIZE;
+                off += CHUNK_SIZE;
+                count = CHUNK_SIZE;
+                writeChunk();
+            }
+            pos = OFFSET;
+        }
+        if (len > 0) {
+            System.arraycopy (b,off,buf,pos,len);
+            count += len;
+            pos += len;
+        }
+    }
+
+    /**
+     * write out a chunk , and reset the pointers
+     * chunk does not have to be CHUNK_SIZE bytes
+     * count must == number of user bytes (<= CHUNK_SIZE)
+     */
+    private void writeChunk () throws IOException {
+        char[] c = Integer.toHexString (count).toCharArray();
+        int clen = c.length;
+        int startByte = 4 - clen;
+        int i;
+        for (i=0; i<clen; i++) {
+            buf[startByte+i] = (byte)c[i];
+        }
+        buf[startByte + (i++)] = '\r';
+        buf[startByte + (i++)] = '\n';
+        buf[startByte + (i++) + count] = '\r';
+        buf[startByte + (i++) + count] = '\n';
+        out.write (buf, startByte, i+count);
+        count = 0;
+        pos = OFFSET;
+    }
+
+    public void close () throws IOException {
+        if (closed) {
+            return;
+        }
+        flush();
+        try {
+            /* write an empty chunk */
+            writeChunk();
+            out.flush();
+            LeftOverInputStream is = t.getOriginalInputStream();
+            if (!is.isClosed()) {
+                is.close();
+            }
+        /* some clients close the connection before empty chunk is sent */
+        } catch (IOException e) {
+
+        } finally {
+            closed = true;
+        }
+
+        WriteFinishedEvent e = new WriteFinishedEvent (t);
+        t.getHttpContext().getServerImpl().addEvent (e);
+    }
+
+    public void flush () throws IOException {
+        if (closed) {
+            throw new StreamClosedException ();
+        }
+        if (count > 0) {
+            writeChunk();
+        }
+        out.flush();
+    }
+}