WebSocketClientExtensionHandshaker (Netty API Reference (4.2.7.Final))

All Known Implementing Classes:

DeflateFrameClientExtensionHandshaker, PerMessageDeflateClientExtensionHandshaker
```
public interface WebSocketClientExtensionHandshaker
```
Handshakes a client extension with the server.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`WebSocketClientExtension`	`handshakeExtension(WebSocketExtensionData extensionData)`	Handshake based on server response.
`WebSocketExtensionData`	`newRequestData()`	Return extension configuration to submit to the server.

- Method Detail
  - newRequestData
```
WebSocketExtensionData newRequestData()
```
    Return extension configuration to submit to the server.
    
    Returns:
    
    the desired extension configuration.
  - handshakeExtension
```
WebSocketClientExtension handshakeExtension(WebSocketExtensionData extensionData)
```
    Handshake based on server response. It should always succeed because server response should be a request acknowledge.
    
    Parameters:
    
    extensionData - the extension configuration sent by the server.
    
    Returns:
    
    an initialized extension if handshake phase succeed or null if failed.