user2973475 user2973475 - 3 months ago 45
reST (reStructuredText) Question

ContainerRequestFilter ContainerResponseFilter dosent get called

I am trying to learn jersey by creating a small RESTful service. I want to use the Filters for specific reasons(Like I want to use the ContainerResponseFilter for CORS headers to allow cross domain requests). However, I am just not able to get these filters intercept my call. I have seen all the posts for this problem and most of them say to register with annotation provider or in web.xml.
I have tried registering the files in web.xml as well as giving a

@Provider
annotation for the container

Here is my web.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 container,
see implementation details http://jersey.java.net/nonav/documentation/latest/jax-rs.html#d4e194 -->
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/spring/config/BeanLocations.xml</param-value>
</context-param>

<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.packages</param-name>
<param-value>com.rest.example</param-value>
</init-param>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.rest.example.cors</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.spi.container.ContainerResponseFilters</param-name>
<param-value>com.rest.example.CORSFilter</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.spi.container.ContainerRequestFilters</param-name>
<param-value>com.rest.example.RequestFilter</param-value>
</init-param>

</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/webresources/*</url-pattern>
</servlet-mapping>

</web-app>


Here are my Filters:

package com.rest.example.cors;

import javax.ws.rs.ext.Provider;

import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerResponse;
import com.sun.jersey.spi.container.ContainerResponseFilter;

@Provider
public class CORSFilter implements ContainerResponseFilter {

public ContainerResponse filter(ContainerRequest creq,
ContainerResponse cresp) {

cresp.getHttpHeaders().putSingle("Access-Control-Allow-Origin", "*");
cresp.getHttpHeaders().putSingle("Access-Control-Allow-Credentials", "true");
cresp.getHttpHeaders().putSingle("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS, HEAD");
cresp.getHttpHeaders().putSingle("Access-Control-Allow-Headers", "Content-Type, Accept, X-Requested-With");

return cresp;
}
}


package com.rest.example.cors;

import javax.ws.rs.ext.Provider;

import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerRequestFilter;

@Provider
public class RequestFilter implements ContainerRequestFilter {

public ContainerRequest filter(ContainerRequest request) {
System.out.println("request filter");
return request;
}

}


Link to my github project.

I am kind of stuck here for 2 days.

Thanks

Answer

I added a Jersey Application class and registered the filter in the class, which solved my problem. Also upgraded my jersey version to 2.x from 1.x

public class MyApplication extends ResourceConfig {

    /**
     * Register JAX-RS application components.
     */
    public MyApplication () {
        register(RequestContextFilter.class);
        register(JacksonFeature.class);
        register(CustomerResource.class);
        register(Initializer.class);
        register(JerseyResource.class);
        register(SpringSingletonResource.class);
        register(SpringRequestResource.class);
        register(CustomExceptionMapper.class);
    }
}