Class StandardWebSocketUpgradeStrategy

java.lang.Object

org.springframework.web.socket.server.standard.StandardWebSocketUpgradeStrategy

All Implemented Interfaces:

RequestUpgradeStrategy

public class StandardWebSocketUpgradeStrategy
extends Object
implements RequestUpgradeStrategy

A WebSocket RequestUpgradeStrategy for the Jakarta WebSocket API 2.1+.

To modify properties of the underlying ServerContainer you can use ServletServerContainerFactoryBean in XML configuration or, when using Java configuration, access the container instance through the "jakarta.websocket.server.ServerContainer" ServletContext attribute.

Since:

6.0

Author:

Juergen Hoeller, Rossen Stoyanchev

See Also:

• ServerContainer.upgradeHttpToWebSocket(java.lang.Object, java.lang.Object, jakarta.websocket.server.ServerEndpointConfig, java.util.Map<java.lang.String, java.lang.String>)

Constructor Summary

Constructors

Constructor	Description
StandardWebSocketUpgradeStrategy()

Method Summary

Modifier and Type	Method	Description
protected ServerContainer	getContainer(HttpServletRequest request)
protected final HttpServletRequest	getHttpServletRequest(ServerHttpRequest request)
protected final HttpServletResponse	getHttpServletResponse(ServerHttpResponse response)
protected List<WebSocketExtension>	getInstalledExtensions(WebSocketContainer container)
List<WebSocketExtension>	getSupportedExtensions(ServerHttpRequest request)	Return the WebSocket protocol extensions supported by the underlying WebSocket server.
String[]	getSupportedVersions()	Return the supported WebSocket protocol versions.
void	upgrade(ServerHttpRequest request, ServerHttpResponse response, @Nullable String selectedProtocol, List<WebSocketExtension> selectedExtensions, @Nullable Principal user, WebSocketHandler wsHandler, Map<String,Object> attrs)	Perform runtime specific steps to complete the upgrade.

Methods inherited from class java.lang.Object

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

Constructor Details

StandardWebSocketUpgradeStrategy

public StandardWebSocketUpgradeStrategy()

Method Details

getSupportedVersions

public String[] getSupportedVersions()

Description copied from interface: RequestUpgradeStrategy

Return the supported WebSocket protocol versions.

Specified by:

getSupportedVersions in interface RequestUpgradeStrategy

getSupportedExtensions

public List<WebSocketExtension> getSupportedExtensions(ServerHttpRequest request)

Description copied from interface: RequestUpgradeStrategy

Return the WebSocket protocol extensions supported by the underlying WebSocket server.

Specified by:

getSupportedExtensions in interface RequestUpgradeStrategy

getInstalledExtensions

protected List<WebSocketExtension> getInstalledExtensions(WebSocketContainer container)

upgrade

public void upgrade(ServerHttpRequest request,
 ServerHttpResponse response,
 @Nullable String selectedProtocol,
 List<WebSocketExtension> selectedExtensions,
 @Nullable Principal user,
 WebSocketHandler wsHandler,
 Map<String,Object> attrs)
             throws HandshakeFailureException

Description copied from interface: RequestUpgradeStrategy

Perform runtime specific steps to complete the upgrade. Invoked after successful negotiation of the handshake request.

Specified by:

upgrade in interface RequestUpgradeStrategy

Parameters:

request - the current request

response - the current response

selectedProtocol - the selected sub-protocol, if any

selectedExtensions - the selected WebSocket protocol extensions

user - the user to associate with the WebSocket session

wsHandler - the handler for WebSocket messages

attrs - handshake request specific attributes to be set on the WebSocket session via HandshakeInterceptor and thus made available to the WebSocketHandler

Throws:

HandshakeFailureException - thrown when handshake processing failed to complete due to an internal, unrecoverable error, i.e. a server error as opposed to a failure to successfully negotiate the requirements of the handshake request.

getContainer

protected ServerContainer getContainer(HttpServletRequest request)

getHttpServletRequest

protected final HttpServletRequest getHttpServletRequest(ServerHttpRequest request)

getHttpServletResponse

protected final HttpServletResponse getHttpServletResponse(ServerHttpResponse response)