PerMessageDeflateHandshake (Undertow 2.1.0.Final API)

java.lang.Object
- io.undertow.websockets.extensions.PerMessageDeflateHandshake

All Implemented Interfaces:

ExtensionHandshake
```
public class PerMessageDeflateHandshake
extends Object
implements ExtensionHandshake
```
Implementation of permessage-deflate WebSocket Extension handshake.
This implementation supports parameters: server_no_context_takeover, client_no_context_takeover .
This implementation does not support parameters: server_max_window_bits, client_max_window_bits .

Author:

Lucas Ponce

See Also:

Compression Extensions for WebSocket

Field Summary

Fields
Modifier and Type Field and Description

static int DEFAULT_DEFLATER
Default configuration for DEFLATE algorithm implementation

Fields
Modifier and Type	Field and Description
`static int`	`DEFAULT_DEFLATER` Default configuration for DEFLATE algorithm implementation

Constructor Summary

Constructors
Constructor and Description
`PerMessageDeflateHandshake()`
`PerMessageDeflateHandshake(boolean client)` Create a new `PerMessageDeflateHandshake` instance.
`PerMessageDeflateHandshake(boolean client, boolean compressContextTakeover, boolean decompressContextTakeover)` Create a new `PerMessageDeflateHandshake` instance.
`PerMessageDeflateHandshake(boolean client, int deflaterLevel)` Create a new `PerMessageDeflateHandshake` instance.
`PerMessageDeflateHandshake(boolean client, int deflaterLevel, boolean compressContextTakeover, boolean decompressContextTakeover)` Create a new `PerMessageDeflateHandshake` instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`WebSocketExtension`	`accept(WebSocketExtension extension)` Validate if an extension request is accepted.
`ExtensionFunction`	`create()` Create a new instance of the `ExtensionFunction` associated to this WebSocket Extension.
`String`	`getName()`
`boolean`	`isIncompatible(List<ExtensionHandshake> extensions)` Validate if current extension is compatible with previously negotiated in the server side.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DEFAULT_DEFLATER
```
public static final int DEFAULT_DEFLATER
```
    Default configuration for DEFLATE algorithm implementation
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - PerMessageDeflateHandshake
```
public PerMessageDeflateHandshake()
```
  - PerMessageDeflateHandshake
```
public PerMessageDeflateHandshake(boolean client)
```
    Create a new PerMessageDeflateHandshake instance.
    
    Parameters:
    
    client - indicate if extension is configured in client (true ) context or server (false ) context.
  - PerMessageDeflateHandshake
```
public PerMessageDeflateHandshake(boolean client,
                                  int deflaterLevel)
```
    Create a new PerMessageDeflateHandshake instance.
    
    Parameters:
    
    client - indicate if extension is configured in client (true ) context or server (false ) context
    
    deflaterLevel - the level of configuration of DEFLATE algorithm implementation
  - PerMessageDeflateHandshake
```
public PerMessageDeflateHandshake(boolean client,
                                  boolean compressContextTakeover,
                                  boolean decompressContextTakeover)
```
    Create a new PerMessageDeflateHandshake instance.
    
    Parameters:
    
    client - flag for client (true ) context or server (false ) context
    
    compressContextTakeover - flag for compressor context takeover or without compressor context
    
    decompressContextTakeover - flag for decompressor context takeover or without decompressor context
  - PerMessageDeflateHandshake
```
public PerMessageDeflateHandshake(boolean client,
                                  int deflaterLevel,
                                  boolean compressContextTakeover,
                                  boolean decompressContextTakeover)
```
    Create a new PerMessageDeflateHandshake instance.
    
    Parameters:
    
    client - flag for client (true ) context or server (false ) context
    
    deflaterLevel - the level of configuration of DEFLATE algorithm implementation
    
    compressContextTakeover - flag for compressor context takeover or without compressor context
    
    decompressContextTakeover - flag for decompressor context takeover or without decompressor context
- Method Detail
  - getName
```
public String getName()
```
    Specified by:
    
    getName in interface ExtensionHandshake
    
    Returns:
    
    name of the WebSocket Extension
  - accept
```
public WebSocketExtension accept(WebSocketExtension extension)
```
    Description copied from interface: ExtensionHandshake
    
    Validate if an extension request is accepted.
    
    Specified by:
    
    accept in interface ExtensionHandshake
    
    Parameters:
    
    extension - the extension request representation
    
    Returns:
    
    a new WebSocketExtension instance with parameters accepted; null in case extension request is not accepted
  - isIncompatible
```
public boolean isIncompatible(List<ExtensionHandshake> extensions)
```
    Description copied from interface: ExtensionHandshake
    
    Validate if current extension is compatible with previously negotiated in the server side.
    
    Specified by:
    
    isIncompatible in interface ExtensionHandshake
    
    Parameters:
    
    extensions - a list of negotiated extensions
    
    Returns:
    
    true if current extension is compatible; false if current extension is not compatible
  - create
```
public ExtensionFunction create()
```
    Description copied from interface: ExtensionHandshake
    
    Create a new instance of the ExtensionFunction associated to this WebSocket Extension.
    
    Specified by:
    
    create in interface ExtensionHandshake
    
    Returns:
    
    a new instance ExtensionFunction

Class PerMessageDeflateHandshake

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_DEFLATER

Constructor Detail

PerMessageDeflateHandshake

PerMessageDeflateHandshake

PerMessageDeflateHandshake

PerMessageDeflateHandshake

PerMessageDeflateHandshake

Method Detail

getName

accept

isIncompatible

create