Question

泽西岛网站上的入门指南：

我执行了以下构建命令：

$ mvn archetype:generate -DarchetypeArtifactId=jersey-quickstart-grizzly2 \
-DarchetypeGroupId=org.glassfish.jersey.archetypes -DinteractiveMode=false \
-DgroupId=com.example -DartifactId=simple-service -Dpackage=com.example \
-DarchetypeVersion=2.2

然后我按照

上的教程进行操作

https://jersey.java.net/documentation/latest/filters-and-interceptors.html#d0e6783

添加自定义ContainerResponseFilter：

@NameBinding
@Retention(RetentionPolicy.RUNTIME)
static @interface CORSBinding {}

@Provider
@Priority(Priorities.HEADER_DECORATOR)
@CORSBinding
static class CrossDomainFilter implements ContainerResponseFilter {
    @Override
    public void filter(ContainerRequestContext creq, ContainerResponseContext cres) {
        Logger.getLogger("com.example").log( Level.INFO, "before: {0}", cres.getHeaders());
        cres.getHeaders().add("Access-Control-Allow-Origin", "*");
        cres.getHeaders().add("Access-Control-Allow-Headers", "origin, content-type, accept, authorization");
        cres.getHeaders().add("Access-Control-Allow-Credentials", "true");
        cres.getHeaders().add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD");
        cres.getHeaders().add("Access-Control-Max-Age", "1209600");
        Logger.getLogger("com.example").log( Level.INFO, "after: {0}", cres.getHeaders());
    }
}

@Provider
static class MyResponseFilter implements ContainerResponseFilter {

    @Override
    public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException {
        System.out.println("MyResponseFilter.postFilter() enter");
        responseContext.setEntity(
                responseContext.getEntity() + ":" + getClass().getSimpleName(), null, MediaType.TEXT_PLAIN_TYPE);
        System.out.println("MyResponseFilter.postFilter() exit");
    }
}

...
@GET
@Produces(MediaType.TEXT_PLAIN)
@CORSBinding
public String helloWorld() {
    return "hello world";
}

我尝试使用命名绑定和动态绑定注册此过滤器，但没有任何作用。

为了轻松复制，我还尝试了官方资源中的一个例子：

https://github.com/jersey/jersey/tree/2.2/examples/exception-mapping

同样的问题：自定义过滤器无法执行。

这是灰熊问题吗？

Answer 1

事实证明你必须手动注册自定义类 - 如：

rc.register(com.dummy.mypackage.CORSResponseFilter.class);

完整示例：

/**
 * Main class.
 *
 */
public class Main {
    // Base URI the Grizzly HTTP server will listen on
    public static final String BASE_URI = "http://192.168.1.34:8080/myapp/";

    /**
     * Starts Grizzly HTTP server exposing JAX-RS resources defined in this application.
     * @return Grizzly HTTP server.
     */
    public static HttpServer startServer() {
        // create a resource config that scans for JAX-RS resources and in com.example package
        final ResourceConfig rc = new ResourceConfig().packages("com.dummy.mypackage");

        //NEW: register custom ResponseFilter
        rc.register(com.dummy.mypackage.CORSResponseFilter.class);

        // Register Jackson JSON
        rc.packages("org.glassfish.jersey.examples.jackson").register(JacksonFeature.class);

        // create and start a new instance of grizzly http server
        // exposing the Jersey application at BASE_URI
        return GrizzlyHttpServerFactory.createHttpServer(URI.create(BASE_URI), rc);
    }
    ...
}

Answer 2

使用Tomcat容器在 web.xml 中添加以下代码对我有用：

<init-param>
    <param-name>jersey.config.server.provider.classnames</param-name>
    <param-value>my.package.SecurityRequestFilter;org.glassfish.jersey.filter.LoggingFilter</param-value>
</init-param>`

我要感谢：

http://blog.dejavu.sk/2013/11/19/registering-resources-and-providers-in-jersey-2/

jersey 2.2：ContainerResponseFilter和ContainerRequestFilter永远不会被执行

2 个答案: