拦截JAX-RS请求：使用tomcat注册ContainerRequestFilter

Question

I am trying to intercept a request to my JAX-RS webservice by a ContainerRequestFilter. I want to use it with a custom annotation, so I can decorate certain methods of the webservice. This should enable me to handle requests to this methods based on the information whether they are made on a secure channel or not, before the actual method is executed.

I tried different approaches, searched several posts and then implemented mostly based on the answer by Alden in this post . But I can't get it working.

I have a method test in my webservice decorated with my custom annotation Ssl.

@POST
@Path("/test")
@Ssl
public static Response test(){      
    System.out.println("TEST ...");
}

The annotation looks like this:

@NameBinding
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.TYPE, ElementType.METHOD })
public @interface Ssl {}

Then I setup a filter implementation

import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.ext.Provider;

@Ssl
@Provider
public class SslInterceptor implements ContainerRequestFilter
{
    @Override
    public void filter(ContainerRequestContext requestContext) throws IOException
    {       
        System.out.println("Filter executed.");
    }
}

But the filter is never executed nor there occur any error messages or warnings. The test method runs fine anyway.

To resolve it, I tried to register the filter in the web.xml as described here .

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>

    <init-param>
      <param-name>com.sun.jersey.config.property.resourceConfigClass</param-name>
      <param-value>com.sun.jersey.api.core.PackagesResourceConfig</param-value>
    </init-param>

    <init-param>
      <param-name>com.sun.jersey.config.property.packages</param-name>
      <param-value>com.my.packagewithfilter</param-value>
    </init-param>

    <init-param>
        <param-name>com.sun.jersey.spi.container.ContainerRequestFilters</param-name>
        <param-value>com.my.packagewithfilter.SslInterceptor</param-value>
    </init-param>

    <init-param>  
      <param-name>jersey.config.server.provider.packages</param-name>  
      <param-value>com.my.packagewithfilter</param-value>
    </init-param>    

  </servlet>

But that also doesn't work. What am I missing? Any ideas how to make that filter work? Any help is really appreciated!

Answer 1

You're using JAX-RS 2.0 APIs (request filters, name binding, ...) in your classes but Jersey 1 proprietary init params in your web.xml (package starting with com.sun.jersey , Jersey 2 uses org.glassfish.jersey ). Take a look at this answer and at these articles:

• Registering Resources and Providers in Jersey 2
• Binding JAX-RS Providers to Resource Methods

Answer 2

Just compiling the answer from Michael Gajdos to help someone who do not want open more tabs:

When you are using Jersey-2 you must use the follow configuration to register your filter into the web.xml

jersey.config.server.provider.classnames

instead of

com.sun.jersey.spi.container.ContainerRequestFilters (jersey-1x)

 <!-- This is the config needed -->
<servlet>    
      //...         
     <init-param>
         <param-name>jersey.config.server.provider.classnames</param-name>
         <param-value>com.your_package_path.yourClassFilter</param-value>
     </init-param>
      //...
</servlet>

Answer 3

看一下这篇博客文章 ，了解更多“经典”方法（不使用注释）