org.java_websocket.extensions

Class DefaultExtension

java.lang.Object

org.java_websocket.extensions.DefaultExtension

All Implemented Interfaces:

IExtension

Direct Known Subclasses:

CompressionExtension

public class DefaultExtension
extends Object
implements IExtension

Class which represents the normal websocket implementation specified by rfc6455. This is a fallback and will always be available for a Draft_6455

Since:

1.3.5

Constructor Summary

Constructors

Constructor and Description
DefaultExtension()

Method Summary

Modifier and Type	Method and Description
boolean	acceptProvidedExtensionAsClient(String inputExtension) Check if the received Sec-WebSocket-Extensions header field contains a offer for the specific extension if the endpoint is in the role of a client
boolean	acceptProvidedExtensionAsServer(String inputExtension) Check if the received Sec-WebSocket-Extensions header field contains a offer for the specific extension if the endpoint is in the role of a server
IExtension	copyInstance() Extensions must only be by one websocket at all.
void	decodeFrame(Framedata inputFrame) Decode a frame with a extension specific algorithm.
void	encodeFrame(Framedata inputFrame) Encode a frame with a extension specific algorithm.
boolean	equals(Object o)
String	getProvidedExtensionAsClient() Return the specific Sec-WebSocket-Extensions header offer for this extension if the endpoint is in the role of a client.
String	getProvidedExtensionAsServer() Return the specific Sec-WebSocket-Extensions header offer for this extension if the endpoint is in the role of a server.
int	hashCode()
void	isFrameValid(Framedata inputFrame) Check if the received frame is correctly implemented by the other endpoint and there are no specification errors (like wrongly set RSV)
void	reset() Cleaning up internal stats when the draft gets reset.
String	toString() Return a string which should contain the class name as well as additional information about the current configurations for this extension (DEBUG purposes)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DefaultExtension

public DefaultExtension()

Method Detail

decodeFrame

public void decodeFrame(Framedata inputFrame)
                 throws InvalidDataException

Description copied from interface: IExtension

Decode a frame with a extension specific algorithm. The algorithm is subject to be implemented by the specific extension. The resulting frame will be used in the application

Specified by:

decodeFrame in interface IExtension

Parameters:

inputFrame - the frame, which has do be decoded to be used in the application

Throws:

InvalidDataException - Throw InvalidDataException if the received frame is not correctly implemented by the other endpoint or there are other protocol errors/decoding errors

encodeFrame

public void encodeFrame(Framedata inputFrame)

Description copied from interface: IExtension

Encode a frame with a extension specific algorithm. The algorithm is subject to be implemented by the specific extension. The resulting frame will be send to the other endpoint.

Specified by:

encodeFrame in interface IExtension

Parameters:

inputFrame - the frame, which has do be encoded to be used on the other endpoint

acceptProvidedExtensionAsServer

public boolean acceptProvidedExtensionAsServer(String inputExtension)

Description copied from interface: IExtension

Check if the received Sec-WebSocket-Extensions header field contains a offer for the specific extension if the endpoint is in the role of a server

Specified by:

acceptProvidedExtensionAsServer in interface IExtension

Parameters:

inputExtension - the received Sec-WebSocket-Extensions header field offered by the other endpoint

Returns:

true, if the offer does fit to this specific extension

acceptProvidedExtensionAsClient

public boolean acceptProvidedExtensionAsClient(String inputExtension)

Description copied from interface: IExtension

Check if the received Sec-WebSocket-Extensions header field contains a offer for the specific extension if the endpoint is in the role of a client

Specified by:

acceptProvidedExtensionAsClient in interface IExtension

Parameters:

inputExtension - the received Sec-WebSocket-Extensions header field offered by the other endpoint

Returns:

true, if the offer does fit to this specific extension

isFrameValid

public void isFrameValid(Framedata inputFrame)
                  throws InvalidDataException

Description copied from interface: IExtension

Check if the received frame is correctly implemented by the other endpoint and there are no specification errors (like wrongly set RSV)

Specified by:

isFrameValid in interface IExtension

Parameters:

inputFrame - the received frame

Throws:

InvalidDataException - Throw InvalidDataException if the received frame is not correctly implementing the specification for the specific extension

getProvidedExtensionAsClient

public String getProvidedExtensionAsClient()

Description copied from interface: IExtension

Return the specific Sec-WebSocket-Extensions header offer for this extension if the endpoint is in the role of a client. If the extension returns an empty string (""), the offer will not be included in the handshake.

Specified by:

getProvidedExtensionAsClient in interface IExtension

Returns:

the specific Sec-WebSocket-Extensions header for this extension

getProvidedExtensionAsServer

public String getProvidedExtensionAsServer()

Description copied from interface: IExtension

Return the specific Sec-WebSocket-Extensions header offer for this extension if the endpoint is in the role of a server. If the extension returns an empty string (""), the offer will not be included in the handshake.

Specified by:

getProvidedExtensionAsServer in interface IExtension

Returns:

the specific Sec-WebSocket-Extensions header for this extension

copyInstance

public IExtension copyInstance()

Description copied from interface: IExtension

Extensions must only be by one websocket at all. To prevent extensions to be used more than once the Websocket implementation should call this method in order to create a new usable version of a given extension instance.
The copy can be safely used in conjunction with a new websocket connection.

Specified by:

copyInstance in interface IExtension

Returns:

a copy of the extension

reset

public void reset()

Description copied from interface: IExtension

Cleaning up internal stats when the draft gets reset.

Specified by:

reset in interface IExtension

toString

public String toString()

Description copied from interface: IExtension

Return a string which should contain the class name as well as additional information about the current configurations for this extension (DEBUG purposes)

Specified by:

toString in interface IExtension

Overrides:

toString in class Object

Returns:

a string containing the class name as well as additional information

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object