Classcast Geworfen Wenn Erste X509Certificate in Jetty-7.1.6.v20100715

Question

Der Filter Ich warf Classcast schrieb

[Ljava.security.cert.X509Certificate; kann nicht auf java.security.cert.X509Certificate gegossen werden

, wenn ich versuche, ein Objekt aus dem ServletRequest Attribute extrahierte zu werfen, d.

public void doFilter(ServletRequest req, ServletResponse res, FilterChain filterChain) throws
IOException, ServletException
        {
            X509Certificate cert = (X509Certificate) req.getAttribute("javax.servlet.request.X509Certificate");
            System.out.println("cert dn " + cert.getSubjectDN().toString());
            filterChain.doFilter(req, res);
        }

gegraben Als ich tiefer verstand ich, dass Ausnahme wie dies wurde wahrscheinlich durch verschiedene Klassenladeprogramme verursacht, obwohl sie von derselben Klasse sind. Wie behebe ich das?

Danke

habe ich den folgenden Frühling 3 configurarion Jetty 7 Stück für Stück

laden

 <bean class="org.eclipse.jetty.server.Server"
      init-method="start" destroy-method="stop">

    <property name="connectors">
        <list>
            <bean id="SSLConnector" class="org.eclipse.jetty.server.ssl.SslSocketConnector">
                <property name="port" value="8553"/>
                <property name="maxIdleTime" value="3600000"/>
                <property name="soLingerTime" value="-1"/>
                <property name="needClientAuth" value="true"/>
                <property name="sslContext">
                    <ref bean="sslContext"/>
                </property>
            </bean>
        </list>
    </property>

    <property name="handler">
        <bean name="contexts" class="org.eclipse.jetty.server.handler.ContextHandlerCollection">
            <property name="handlers">
                <list>
                    <bean class="org.eclipse.jetty.servlet.ServletContextHandler">
                        <property name="contextPath">
                            <value>/caas</value>
                        </property>

                        <property name="resourceBase" value="src/main/secure_webapp"/>

                        <property name="sessionHandler">
                            <bean class="org.eclipse.jetty.server.session.SessionHandler"/>
                        </property>

                        <property name="servletHandler">

                            <bean class="org.eclipse.jetty.servlet.ServletHandler">
                              <property name="filters">
                                    <list>
                                        <bean class="org.eclipse.jetty.servlet.FilterHolder">
                                            <property name="name" value="myfilter"/>
                                            <property name="filter">
                                                <bean class="com.acme.MyFilter"/>
                                            </property>
                                        </bean>
                                    </list>
                                </property>

                                <property name="filterMappings">
                                    <list>
                                        <bean class="org.eclipse.jetty.servlet.FilterMapping">
                                            <property name="pathSpec">
                                                <value>/*</value>
                                            </property>
                                            <property name="filterName"
                                                      value="myfilter"/>
                                        </bean>
                                    </list>
                                </property>

                                <property name="servlets">
                                    <list>
                                        <bean class="org.eclipse.jetty.servlet.ServletHolder">
                                            <property name="name" value="default"/>
                                            <property name="servlet">
                                                <bean class="org.eclipse.jetty.servlet.DefaultServlet"/>
                                            </property>
                                        </bean>
                                    </list>
                                </property>

                                <property name="servletMappings">
                                    <list>
                                        <bean class="org.eclipse.jetty.servlet.ServletMapping">
                                            <property name="pathSpecs">
                                                <list>
                                                    <value>/</value>
                                                </list>
                                            </property>
                                            <property name="servletName" value="default"/>
                                        </bean>
                                    </list>
                                </property>
                            </bean>
                        </property>
                    </bean>
                </list>
            </property>
        </bean>
    </property>
</bean>

Answer 1

I don't think it's a duplicate class problem in this case, because X509Certificate is contained in the core JRE libraries. There is, afaik, no other library which provides this abstract class.

I think the problem is the getAttribute() returns an array of X509Certificate objects, whereas you cast it down to a single object. The beginning [L of the ClassCastException message indicates that the object returned is an array.

Try casting to an array of certificates:

X509Certificate[] cert = (X509Certificate[])
         req.getAttribute("javax.servlet.request.X509Certificate");

Also, i think that you should retrieve the object from getAttribute() and use instanceof checks to see whether it contains the desired types and maybe handle them differently.