Question

我有以下ServletContextListener：

NSString * s = [[NSString alloc]initWithData:data encoding: NSUTF8StringEncoding];

}

并在web.xml中引用它，如下所示：

public class MyContextEventListener implements ServletContextListener {
...
@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
    Properties properties = new Properties();
    try {
        if (servletContextEvent.getServletContext().getContextPath().contains(CONTEXT_PATH)) {
            final InputStream inputStream = servletContextEvent.getServletContext().getClassLoader()
                .getResourceAsStream("my.properties");
            properties.load(inputStream);
        }
        SSOAgentConfigs.initConfig(properties);
    } catch (Exception e) {
        // handle exceptions
    }      
}

我还有一个简单的虚拟过滤器，如下所示：

<listener>
        <listener-class>com.my.domain.and.company.MyContextEventListener</listener-class>
</listener>

我得到以下例外：

public class WSO2SAMLSSOSessionBeanFilter extends SSOAgentFilter {

@Override
public void init(FilterConfig filterConfig) throws ServletException {
    super.init(filterConfig);
}

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
        throws IOException, ServletException {  
    super.doFilter(servletRequest, servletResponse, filterChain); // here the Exception occures
}

因此找不到 SSOAgentConfig - 我在 MyContextEventListener 中设置的对象。有谁知道我能做什么才能在Filter中找到 SSOAgentConfig ？

[编辑]

在web.xml中引用了过滤器：

Stack Trace
org.wso2.carbon.identity.sso.agent.SSOAgentException: Cannot find 
org.wso2.carbon.identity.sso.agent.SSOAgentConfig set a request attribute. 
Unable to proceed further org.wso2.carbon.identity.sso.agent.SSOAgentFilter.doFilter(SSOAgentFilter.java:71)

Answer 1

例外来自SSOAgentFilter文件。 Here你可以找到来源。这是相关部分：

SSOAgentConfig ssoAgentConfig = (SSOAgentConfig) request.
    getAttribute(SSOAgentConstants.CONFIG_BEAN_NAME);
if (ssoAgentConfig == null) {
    throw new SSOAgentException("Cannot find " + SSOAgentConstants.CONFIG_BEAN_NAME +
        " set a request attribute. Unable to proceed further");
}

所以你需要做的就是为这个常量设置一个请求属性：

public class WSO2SAMLSSOSessionBeanFilter extends SSOAgentFilter {

// ...

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
        throws IOException, ServletException {
        // TODO figure out the right config for the following line
        servletRequest.setAttribute(SSOAgentConstants.CONFIG_BEAN_NAME, "the right config...");
        super.doFilter(servletRequest, servletResponse, filterChain);
    }
}

更新

也许这个解决方案也有帮助：

public class WSO2SAMLSSOSessionBeanFilter extends CarbonSSOAgentFilter {
    // ...
}

Java Filter无法找到config-object

1 个答案:

更新