Package org.eclipse.jetty.proxy

Class AsyncMiddleManServlet.GZIPContentTransformer

java.lang.Object

org.eclipse.jetty.proxy.AsyncMiddleManServlet.GZIPContentTransformer

All Implemented Interfaces:

AsyncMiddleManServlet.ContentTransformer

Enclosing class:

AsyncMiddleManServlet

public static class AsyncMiddleManServlet.GZIPContentTransformer
extends Object
implements AsyncMiddleManServlet.ContentTransformer

Field Summary

Fields inherited from interface org.eclipse.jetty.proxy.AsyncMiddleManServlet.ContentTransformer

IDENTITY

Constructor Summary

Constructors

Constructor	Description
GZIPContentTransformer(HttpClient httpClient, AsyncMiddleManServlet.ContentTransformer transformer)
GZIPContentTransformer(AsyncMiddleManServlet.ContentTransformer transformer)

Method Summary

Modifier and Type	Method	Description
void	transform(ByteBuffer input, boolean finished, List<ByteBuffer> output)	Transforms the given input byte buffers into (possibly multiple) byte buffers.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

GZIPContentTransformer

public GZIPContentTransformer(AsyncMiddleManServlet.ContentTransformer transformer)

GZIPContentTransformer

public GZIPContentTransformer(HttpClient httpClient,
 AsyncMiddleManServlet.ContentTransformer transformer)

Method Details

transform

public void transform(ByteBuffer input,
 boolean finished,
 List<ByteBuffer> output)
               throws IOException

Description copied from interface: AsyncMiddleManServlet.ContentTransformer

Transforms the given input byte buffers into (possibly multiple) byte buffers.

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 finished flag).

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.

Typical implementations:

 // 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);
     }
 }
 

Specified by:

transform in interface AsyncMiddleManServlet.ContentTransformer

Parameters:

input - the input content to transform (may be of length zero)

finished - whether the input content is finished or more will come

output - where to put the transformed output content

Throws:

IOException - in case of transformation failures