| 程序包 | 说明 | 
|---|---|
| io.netty.handler.codec.http.websocketx.extensions | Encoder, decoder, handshakers to handle
 WebSocket Extensions. | 
| io.netty.handler.codec.http.websocketx.extensions.compression | Encoder, decoder, handshakers to handle most common WebSocket Compression Extensions. | 
| 限定符和类型 | 方法和说明 | 
|---|---|
| WebSocketClientExtension | WebSocketClientExtensionHandshaker. handshakeExtension(WebSocketExtensionData extensionData)Handshake based on server response. | 
| 限定符和类型 | 方法和说明 | 
|---|---|
| WebSocketClientExtension | PerMessageDeflateClientExtensionHandshaker. handshakeExtension(WebSocketExtensionData extensionData) | 
| WebSocketClientExtension | DeflateFrameClientExtensionHandshaker. handshakeExtension(WebSocketExtensionData extensionData) |