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 <pre>public static interface <span class="typeNameLabel">AsyncMiddleManServlet.ContentTransformer</span></pre>
 <div class="block"><p>Allows applications to transform upstream and downstream content.</p>
  <p>Typical use cases of transformations are URL rewriting of HTML anchors
  (where the value of the <code>href</code> attribute of &lt;a&gt; elements
  is modified by the proxy), field renaming of JSON documents, etc.</p>
  <p>Applications should override <a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.html#newClientRequestContentTransformer-javax.servlet.http.HttpServletRequest-org.eclipse.jetty.client.api.Request-"><code>AsyncMiddleManServlet.newClientRequestContentTransformer(HttpServletRequest, Request)</code></a>
  and/or <a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.html#newServerResponseContentTransformer-javax.servlet.http.HttpServletRequest-javax.servlet.http.HttpServletResponse-org.eclipse.jetty.client.api.Response-"><code>AsyncMiddleManServlet.newServerResponseContentTransformer(HttpServletRequest, HttpServletResponse, Response)</code></a>
  to provide the transformer implementation.</p></div>
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 <td class="colFirst"><code>static <a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.ContentTransformer.html" title="interface in org.eclipse.jetty.proxy">AsyncMiddleManServlet.ContentTransformer</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.ContentTransformer.html#IDENTITY">IDENTITY</a></span></code>
 <div class="block">The identity transformer that does not perform any transformation.</div>
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 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.ContentTransformer.html#transform-java.nio.ByteBuffer-boolean-java.util.List-">transform</a></span>(java.nio.ByteBuffer&nbsp;input,
          boolean&nbsp;finished,
          java.util.List&lt;java.nio.ByteBuffer&gt;&nbsp;output)</code>
 <div class="block">Transforms the given input byte buffers into (possibly multiple) byte buffers.</div>
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 <pre>static final&nbsp;<a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.ContentTransformer.html" title="interface in org.eclipse.jetty.proxy">AsyncMiddleManServlet.ContentTransformer</a> IDENTITY</pre>
 <div class="block">The identity transformer that does not perform any transformation.</div>
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 <pre>void&nbsp;transform(java.nio.ByteBuffer&nbsp;input,
                boolean&nbsp;finished,
                java.util.List&lt;java.nio.ByteBuffer&gt;&nbsp;output)
         throws java.io.IOException</pre>
 <div class="block"><p>Transforms the given input byte buffers into (possibly multiple) byte buffers.</p>
  <p>The transformation must happen synchronously in the context of a call
  to this method (it is not supported to perform the transformation in another
  thread spawned during the call to this method).
  The transformation may happen or not, depending on the transformer implementation.
  For example, a buffering transformer may buffer the input aside, and only
  perform the transformation when the whole input is provided (by looking at the
  <code>finished</code> flag).</p>
  <p>The input buffer will be cleared and reused after the call to this method.
  Implementations that want to buffer aside the input (or part of it) must copy
  the input bytes that they want to buffer.</p>
  <p>Typical implementations:</p>
  <pre>
  // Identity transformation (no transformation, the input is copied to the output)
  public void transform(ByteBuffer input, boolean finished, List&lt;ByteBuffer&gt; output)
  {
      output.add(input);
  }

  // Discard transformation (all input is discarded)
  public void transform(ByteBuffer input, boolean finished, List&lt;ByteBuffer&gt; output)
  {
      // Empty
  }

  // Buffering identity transformation (all input is buffered aside until it is finished)
  public void transform(ByteBuffer input, boolean finished, List&lt;ByteBuffer&gt; output)
  {
      ByteBuffer copy = ByteBuffer.allocate(input.remaining());
      copy.put(input).flip();
      store(copy);

      if (finished)
      {
          List&lt;ByteBuffer&gt; copies = retrieve();
          output.addAll(copies);
      }
  }
  </pre></div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>input</code> - the input content to transform (may be of length zero)</dd>
 <dd><code>finished</code> - whether the input content is finished or more will come</dd>
 <dd><code>output</code> - where to put the transformed output content</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>java.io.IOException</code> - in case of transformation failures</dd>
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	<pre>public static interface <span class="typeNameLabel">AsyncMiddleManServlet.ContentTransformer</span></pre>
	<div class="block"><p>Allows applications to transform upstream and downstream content.</p>
	<p>Typical use cases of transformations are URL rewriting of HTML anchors
	(where the value of the <code>href</code> attribute of <a> elements
	is modified by the proxy), field renaming of JSON documents, etc.</p>
	<p>Applications should override <a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.html#newClientRequestContentTransformer-javax.servlet.http.HttpServletRequest-org.eclipse.jetty.client.api.Request-"><code>AsyncMiddleManServlet.newClientRequestContentTransformer(HttpServletRequest, Request)</code></a>
	and/or <a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.html#newServerResponseContentTransformer-javax.servlet.http.HttpServletRequest-javax.servlet.http.HttpServletResponse-org.eclipse.jetty.client.api.Response-"><code>AsyncMiddleManServlet.newServerResponseContentTransformer(HttpServletRequest, HttpServletResponse, Response)</code></a>
	to provide the transformer implementation.</p></div>
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	<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.ContentTransformer.html#IDENTITY">IDENTITY</a></span></code>
	<div class="block">The identity transformer that does not perform any transformation.</div>
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	<td class="colFirst"><code>void</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.ContentTransformer.html#transform-java.nio.ByteBuffer-boolean-java.util.List-">transform</a></span>(java.nio.ByteBuffer input,
	boolean finished,
	java.util.List<java.nio.ByteBuffer> output)</code>
	<div class="block">Transforms the given input byte buffers into (possibly multiple) byte buffers.</div>
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	<pre>static final <a href="../../../../org/eclipse/jetty/proxy/AsyncMiddleManServlet.ContentTransformer.html" title="interface in org.eclipse.jetty.proxy">AsyncMiddleManServlet.ContentTransformer</a> IDENTITY</pre>
	<div class="block">The identity transformer that does not perform any transformation.</div>
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	<h4>transform</h4>
	<pre>void transform(java.nio.ByteBuffer input,
	boolean finished,
	java.util.List<java.nio.ByteBuffer> output)
	throws java.io.IOException</pre>
	<div class="block"><p>Transforms the given input byte buffers into (possibly multiple) byte buffers.</p>
	<p>The transformation must happen synchronously in the context of a call
	to this method (it is not supported to perform the transformation in another
	thread spawned during the call to this method).
	The transformation may happen or not, depending on the transformer implementation.
	For example, a buffering transformer may buffer the input aside, and only
	perform the transformation when the whole input is provided (by looking at the
	<code>finished</code> flag).</p>
	<p>The input buffer will be cleared and reused after the call to this method.
	Implementations that want to buffer aside the input (or part of it) must copy
	the input bytes that they want to buffer.</p>
	<p>Typical implementations:</p>
	<pre>
	// Identity transformation (no transformation, the input is copied to the output)
	public void transform(ByteBuffer input, boolean finished, List<ByteBuffer> output)
	{
	output.add(input);
	}

	// Discard transformation (all input is discarded)
	public void transform(ByteBuffer input, boolean finished, List<ByteBuffer> output)
	{
	// Empty
	}

	// Buffering identity transformation (all input is buffered aside until it is finished)
	public void transform(ByteBuffer input, boolean finished, List<ByteBuffer> output)
	{
	ByteBuffer copy = ByteBuffer.allocate(input.remaining());
	copy.put(input).flip();
	store(copy);

	if (finished)
	{
	List<ByteBuffer> copies = retrieve();
	output.addAll(copies);
	}
	}
	</pre></div>
	<dl>
	<dt><span class="paramLabel">Parameters:</span></dt>
	<dd><code>input</code> - the input content to transform (may be of length zero)</dd>
	<dd><code>finished</code> - whether the input content is finished or more will come</dd>
	<dd><code>output</code> - where to put the transformed output content</dd>
	<dt><span class="throwsLabel">Throws:</span></dt>
	<dd><code>java.io.IOException</code> - in case of transformation failures</dd>
	</dl>
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