org.apache.wicket.protocol.ws

Class AbstractUpgradeFilter

java.lang.Object

org.apache.wicket.protocol.http.WicketFilter

org.apache.wicket.protocol.ws.AbstractUpgradeFilter

All Implemented Interfaces:

javax.servlet.Filter

Direct Known Subclasses:

JavaxWebSocketFilter

public class AbstractUpgradeFilter
extends WicketFilter

An extension of WicketFilter that is used to check whether the processed HttpServletRequest needs to upgrade its protocol from HTTP to something else

Since:

6.0

Field Summary

Fields inherited from class org.apache.wicket.protocol.http.WicketFilter

APP_FACT_PARAM, FILTER_MAPPING_PARAM, IGNORE_PATHS_PARAM

Constructor Summary

Constructors

Constructor and Description
AbstractUpgradeFilter()
AbstractUpgradeFilter(WebApplication application)

Method Summary

Modifier and Type	Method and Description
protected boolean	acceptWebSocket(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
protected List<String>	getTokensFromHeader(javax.servlet.http.HttpServletRequest req, String headerName)
protected boolean	processRequestCycle(RequestCycle requestCycle, WebResponse webResponse, javax.servlet.http.HttpServletRequest httpServletRequest, javax.servlet.http.HttpServletResponse httpServletResponse, javax.servlet.FilterChain chain) Process the request cycle
protected String	selectSubProtocol(List<String> subProtocols) Intended to be overridden by sub-classes that wish to select a sub-protocol if the client provides a list of supported protocols.
protected boolean	verifyOrigin(String origin) Intended to be overridden by sub-classes that wish to verify the origin of a WebSocket request before processing it.

Methods inherited from class org.apache.wicket.protocol.http.WicketFilter

checkIfRedirectRequired, destroy, doFilter, getApplication, getApplicationFactory, getClassLoader, getFilterConfig, getFilterPath, getFilterPath, getFilterPathFromAnnotation, getFilterPathFromConfig, getFilterPathFromWebXml, getRelativePath, init, init, setFilterPath

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractUpgradeFilter

public AbstractUpgradeFilter()

AbstractUpgradeFilter

public AbstractUpgradeFilter(WebApplication application)

Method Detail

processRequestCycle

protected boolean processRequestCycle(RequestCycle requestCycle,
                                      WebResponse webResponse,
                                      javax.servlet.http.HttpServletRequest httpServletRequest,
                                      javax.servlet.http.HttpServletResponse httpServletResponse,
                                      javax.servlet.FilterChain chain)
                               throws IOException,
                                      javax.servlet.ServletException

Description copied from class: WicketFilter

Process the request cycle

Overrides:

processRequestCycle in class WicketFilter

Returns:

false, if the request could not be processed

Throws:

IOException

javax.servlet.ServletException

acceptWebSocket

protected boolean acceptWebSocket(javax.servlet.http.HttpServletRequest req,
                                  javax.servlet.http.HttpServletResponse resp)
                           throws javax.servlet.ServletException,
                                  IOException

Throws:

javax.servlet.ServletException

IOException

getTokensFromHeader

protected List<String> getTokensFromHeader(javax.servlet.http.HttpServletRequest req,
                                           String headerName)

verifyOrigin

protected boolean verifyOrigin(String origin)

Intended to be overridden by sub-classes that wish to verify the origin of a WebSocket request before processing it.

Parameters:

origin - The value of the origin header from the request which may be null

Returns:

true to accept the request. false to reject it. This default implementation always returns true.

selectSubProtocol

protected String selectSubProtocol(List<String> subProtocols)

Intended to be overridden by sub-classes that wish to select a sub-protocol if the client provides a list of supported protocols.

Parameters:

subProtocols - The list of sub-protocols supported by the client in client preference order. The server is under no obligation to respect the declared preference

Returns:

null if no sub-protocol is selected or the name of the protocol which must be one of the protocols listed by the client. This default implementation always returns null.