--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/eclipse/jetty/io/UncheckedPrintWriter.java	Wed Sep 07 21:15:48 2016 -0600
@@ -0,0 +1,682 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+package org.eclipse.jetty.io;
+
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.InterruptedIOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.io.Writer;
+
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+
+/* ------------------------------------------------------------ */
+/**
+ * A wrapper for the {@link java.io.PrintWriter} that re-throws the instances of
+ * {@link java.io.IOException} thrown by the underlying implementation of
+ * {@link java.io.Writer} as {@link RuntimeIOException} instances.
+ */
+public class UncheckedPrintWriter extends PrintWriter
+{
+    private static final Logger LOG = Log.getLogger(UncheckedPrintWriter.class);
+
+    private boolean _autoFlush = false;
+    private IOException _ioException;
+    private boolean _isClosed = false;
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Line separator string. This is the value of the line.separator property
+     * at the moment that the stream was created.
+     */
+    private String _lineSeparator;
+
+    public UncheckedPrintWriter(Writer out)
+    {
+        this(out,false);
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Create a new PrintWriter.
+     * 
+     * @param out
+     *            A character-output stream
+     * @param autoFlush
+     *            A boolean; if true, the println() methods will flush the
+     *            output buffer
+     */
+    public UncheckedPrintWriter(Writer out, boolean autoFlush)
+    {
+        super(out,autoFlush);
+        this._autoFlush = autoFlush;
+        this._lineSeparator = System.getProperty("line.separator");
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Create a new PrintWriter, without automatic line flushing, from an
+     * existing OutputStream. This convenience constructor creates the necessary
+     * intermediate OutputStreamWriter, which will convert characters into bytes
+     * using the default character encoding.
+     * 
+     * @param out
+     *            An output stream
+     * 
+     * @see java.io.OutputStreamWriter#OutputStreamWriter(java.io.OutputStream)
+     */
+    public UncheckedPrintWriter(OutputStream out)
+    {
+        this(out,false);
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Create a new PrintWriter from an existing OutputStream. This convenience
+     * constructor creates the necessary intermediate OutputStreamWriter, which
+     * will convert characters into bytes using the default character encoding.
+     * 
+     * @param out
+     *            An output stream
+     * @param autoFlush
+     *            A boolean; if true, the println() methods will flush the
+     *            output buffer
+     * 
+     * @see java.io.OutputStreamWriter#OutputStreamWriter(java.io.OutputStream)
+     */
+    public UncheckedPrintWriter(OutputStream out, boolean autoFlush)
+    {
+        this(new BufferedWriter(new OutputStreamWriter(out)),autoFlush);
+    }
+    
+    
+    /* ------------------------------------------------------------ */
+    public boolean checkError()
+    {
+        return _ioException!=null || super.checkError();
+    }
+    
+    /* ------------------------------------------------------------ */
+    private void setError(Throwable th)
+    {
+      
+        super.setError();
+
+        if (th instanceof IOException)
+            _ioException=(IOException)th;
+        else
+        {
+            _ioException=new IOException(String.valueOf(th));
+            _ioException.initCause(th);
+        }
+
+        LOG.debug(th);
+    }
+
+
+    @Override
+    protected void setError()
+    {
+        setError(new IOException());
+    }
+
+    /* ------------------------------------------------------------ */
+    /** Check to make sure that the stream has not been closed */
+    private void isOpen() throws IOException
+    {       
+        if (_ioException!=null)
+            throw new RuntimeIOException(_ioException); 
+        
+        if (_isClosed)
+            throw new IOException("Stream closed");
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Flush the stream.
+     */
+    @Override
+    public void flush()
+    {
+        try
+        {
+            synchronized (lock)
+            {
+                isOpen();
+                out.flush();
+            }
+        }
+        catch (IOException ex)
+        {
+            setError(ex);
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Close the stream.
+     */
+    @Override
+    public void close()
+    {
+        try
+        {
+            synchronized (lock)
+            {
+                out.close();
+                _isClosed = true;
+            }
+        }
+        catch (IOException ex)
+        {
+            setError(ex);
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Write a single character.
+     * 
+     * @param c
+     *            int specifying a character to be written.
+     */
+    @Override
+    public void write(int c)
+    {
+        try
+        {
+            synchronized (lock)
+            {
+                isOpen();
+                out.write(c);
+            }
+        }
+        catch (InterruptedIOException x)
+        {
+            Thread.currentThread().interrupt();
+        }
+        catch (IOException ex)
+        {
+            setError(ex);
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Write a portion of an array of characters.
+     * 
+     * @param buf
+     *            Array of characters
+     * @param off
+     *            Offset from which to start writing characters
+     * @param len
+     *            Number of characters to write
+     */
+    @Override
+    public void write(char buf[], int off, int len)
+    {
+        try
+        {
+            synchronized (lock)
+            {
+                isOpen();
+                out.write(buf,off,len);
+            }
+        }
+        catch (InterruptedIOException x)
+        {
+            Thread.currentThread().interrupt();
+        }
+        catch (IOException ex)
+        {
+            setError(ex);
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Write an array of characters. This method cannot be inherited from the
+     * Writer class because it must suppress I/O exceptions.
+     * 
+     * @param buf
+     *            Array of characters to be written
+     */
+    @Override
+    public void write(char buf[])
+    { 
+        this.write(buf,0,buf.length);
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Write a portion of a string.
+     * 
+     * @param s
+     *            A String
+     * @param off
+     *            Offset from which to start writing characters
+     * @param len
+     *            Number of characters to write
+     */
+    @Override
+    public void write(String s, int off, int len)
+    {
+        try
+        {
+            synchronized (lock)
+            {
+                isOpen();
+                out.write(s,off,len);
+            }
+        }
+        catch (InterruptedIOException x)
+        {
+            Thread.currentThread().interrupt();
+        }
+        catch (IOException ex)
+        {
+            setError(ex);
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Write a string. This method cannot be inherited from the Writer class
+     * because it must suppress I/O exceptions.
+     * 
+     * @param s
+     *            String to be written
+     */
+    @Override
+    public void write(String s)
+    {
+        this.write(s,0,s.length());
+    }
+
+    private void newLine()
+    {
+        try
+        {
+            synchronized (lock)
+            {
+                isOpen();
+                out.write(_lineSeparator);
+                if (_autoFlush)
+                    out.flush();
+            }
+        }
+        catch (InterruptedIOException x)
+        {
+            Thread.currentThread().interrupt();
+        }
+        catch (IOException ex)
+        {
+            setError(ex);
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a boolean value. The string produced by <code>{@link
+     * java.lang.String#valueOf(boolean)}</code> is translated into bytes
+     * according to the platform's default character encoding, and these bytes
+     * are written in exactly the manner of the <code>{@link
+     * #write(int)}</code> method.
+     * 
+     * @param b
+     *            The <code>boolean</code> to be printed
+     */
+    @Override
+    public void print(boolean b)
+    {
+        this.write(b?"true":"false");
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a character. The character is translated into one or more bytes
+     * according to the platform's default character encoding, and these bytes
+     * are written in exactly the manner of the <code>{@link
+     * #write(int)}</code> method.
+     * 
+     * @param c
+     *            The <code>char</code> to be printed
+     */
+    @Override
+    public void print(char c)
+    {
+        this.write(c);
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print an integer. The string produced by <code>{@link
+     * java.lang.String#valueOf(int)}</code> is translated into bytes according
+     * to the platform's default character encoding, and these bytes are written
+     * in exactly the manner of the <code>{@link #write(int)}</code> method.
+     * 
+     * @param i
+     *            The <code>int</code> to be printed
+     * @see java.lang.Integer#toString(int)
+     */
+    @Override
+    public void print(int i)
+    {
+        this.write(String.valueOf(i));
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a long integer. The string produced by <code>{@link
+     * java.lang.String#valueOf(long)}</code> is translated into bytes according
+     * to the platform's default character encoding, and these bytes are written
+     * in exactly the manner of the <code>{@link #write(int)}</code> method.
+     * 
+     * @param l
+     *            The <code>long</code> to be printed
+     * @see java.lang.Long#toString(long)
+     */
+    @Override
+    public void print(long l)
+    {
+        this.write(String.valueOf(l));
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a floating-point number. The string produced by <code>{@link
+     * java.lang.String#valueOf(float)}</code> is translated into bytes
+     * according to the platform's default character encoding, and these bytes
+     * are written in exactly the manner of the <code>{@link #write(int)}</code>
+     * method.
+     * 
+     * @param f
+     *            The <code>float</code> to be printed
+     * @see java.lang.Float#toString(float)
+     */
+    @Override
+    public void print(float f)
+    {
+        this.write(String.valueOf(f));
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a double-precision floating-point number. The string produced by
+     * <code>{@link java.lang.String#valueOf(double)}</code> is translated into
+     * bytes according to the platform's default character encoding, and these
+     * bytes are written in exactly the manner of the <code>{@link
+     * #write(int)}</code> method.
+     * 
+     * @param d
+     *            The <code>double</code> to be printed
+     * @see java.lang.Double#toString(double)
+     */
+    @Override
+    public void print(double d)
+    {
+        this.write(String.valueOf(d));
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print an array of characters. The characters are converted into bytes
+     * according to the platform's default character encoding, and these bytes
+     * are written in exactly the manner of the <code>{@link #write(int)}</code>
+     * method.
+     * 
+     * @param s
+     *            The array of chars to be printed
+     * 
+     * @throws NullPointerException
+     *             If <code>s</code> is <code>null</code>
+     */
+    @Override
+    public void print(char s[])
+    {
+        this.write(s);
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a string. If the argument is <code>null</code> then the string
+     * <code>"null"</code> is printed. Otherwise, the string's characters are
+     * converted into bytes according to the platform's default character
+     * encoding, and these bytes are written in exactly the manner of the
+     * <code>{@link #write(int)}</code> method.
+     * 
+     * @param s
+     *            The <code>String</code> to be printed
+     */
+    @Override
+    public void print(String s)
+    {
+        if (s == null)
+        {
+            s = "null";
+        }
+        this.write(s);
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print an object. The string produced by the <code>{@link
+     * java.lang.String#valueOf(Object)}</code> method is translated into bytes
+     * according to the platform's default character encoding, and these bytes
+     * are written in exactly the manner of the <code>{@link #write(int)}</code>
+     * method.
+     * 
+     * @param obj
+     *            The <code>Object</code> to be printed
+     * @see java.lang.Object#toString()
+     */
+    @Override
+    public void print(Object obj)
+    {
+        this.write(String.valueOf(obj));
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Terminate the current line by writing the line separator string. The line
+     * separator string is defined by the system property
+     * <code>line.separator</code>, and is not necessarily a single newline
+     * character (<code>'\n'</code>).
+     */
+    @Override
+    public void println()
+    {
+        this.newLine();
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a boolean value and then terminate the line. This method behaves as
+     * though it invokes <code>{@link #print(boolean)}</code> and then
+     * <code>{@link #println()}</code>.
+     * 
+     * @param x
+     *            the <code>boolean</code> value to be printed
+     */
+    @Override
+    public void println(boolean x)
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a character and then terminate the line. This method behaves as
+     * though it invokes <code>{@link #print(char)}</code> and then <code>{@link
+     * #println()}</code>.
+     * 
+     * @param x
+     *            the <code>char</code> value to be printed
+     */
+    @Override
+    public void println(char x)
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print an integer and then terminate the line. This method behaves as
+     * though it invokes <code>{@link #print(int)}</code> and then <code>{@link
+     * #println()}</code>.
+     * 
+     * @param x
+     *            the <code>int</code> value to be printed
+     */
+    @Override
+    public void println(int x)
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a long integer and then terminate the line. This method behaves as
+     * though it invokes <code>{@link #print(long)}</code> and then
+     * <code>{@link #println()}</code>.
+     * 
+     * @param x
+     *            the <code>long</code> value to be printed
+     */
+    @Override
+    public void println(long x)
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a floating-point number and then terminate the line. This method
+     * behaves as though it invokes <code>{@link #print(float)}</code> and then
+     * <code>{@link #println()}</code>.
+     * 
+     * @param x
+     *            the <code>float</code> value to be printed
+     */
+    @Override
+    public void println(float x)
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a double-precision floating-point number and then terminate the
+     * line. This method behaves as though it invokes <code>{@link
+     * #print(double)}</code> and then <code>{@link #println()}</code>.
+     * 
+     * @param x
+     *            the <code>double</code> value to be printed
+     */
+    /* ------------------------------------------------------------ */
+    @Override
+    public void println(double x)
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print an array of characters and then terminate the line. This method
+     * behaves as though it invokes <code>{@link #print(char[])}</code> and then
+     * <code>{@link #println()}</code>.
+     * 
+     * @param x
+     *            the array of <code>char</code> values to be printed
+     */
+    @Override
+    public void println(char x[])
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print a String and then terminate the line. This method behaves as though
+     * it invokes <code>{@link #print(String)}</code> and then
+     * <code>{@link #println()}</code>.
+     * 
+     * @param x
+     *            the <code>String</code> value to be printed
+     */
+    @Override
+    public void println(String x)
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Print an Object and then terminate the line. This method behaves as
+     * though it invokes <code>{@link #print(Object)}</code> and then
+     * <code>{@link #println()}</code>.
+     * 
+     * @param x
+     *            the <code>Object</code> value to be printed
+     */
+    @Override
+    public void println(Object x)
+    {
+        synchronized (lock)
+        {
+            this.print(x);
+            this.println();
+        }
+    }
+}