如何设置跨域策略与嵌入式码头?RESTserver

Question

我想知道如何设置跨域策略，是使用过滤器还是使用web.xml?怎么加呢?我用jetty和jersey。

这是我的主

   public static void main(String[] args) throws Exception {
     Server server = new Server(8080);
     ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
     context.setContextPath("/");
     context.addServlet(org.eclipse.jetty.servlet.DefaultServlet.class, "/");
     context.setResourceBase(".");
     server.setHandler(context);
     ServletHolder jerseyServlet = context.addServlet(org.glassfish.jersey.servlet.ServletContainer.class, "/*");
     jerseyServlet.setInitOrder(0);
     jerseyServlet.setInitParameter("jersey.config.server.provider.packages", "my.package.rest");
     server.start();
     server.join();    
  }

我的web . xml

<web-app>
<filter>
    <filter-name>cross-origin</filter-name>
    <filter-class>org.eclipse.jetty.servlets.CrossOriginFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>cross-origin</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

Answer 1

实际上我只是找到了答案看这个我发现，我们只需要添加服务器"响应"的头属性，这样:

@GET
@Path("sin")
@Produces(MediaType.TEXT_PLAIN)
public Response hello() {
    String var = "[0.0, 0.0]";      
    return Response.ok().entity(var)
            .header("Access-Control-Allow-Origin", "*")
            .header("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT")
            .allow("OPTIONS").build();
}

我认为这种方式也适用于JSON或其他。

希望对你有帮助。

Answer 2

思路相同，方法不同。使用以下代码创建一个ContainerResponseFilter，一次性为所有jax-rs web服务放置报头:

@Provider
public class HeadersReponseFilter implements ContainerResponseFilter {
    @Override
    public void filter(ContainerRequestContext request, ContainerResponseContext response) {
        response.getHeaders().putSingle("Access-Control-Allow-Origin", "*");
        response.getHeaders().putSingle("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT");
    }    
}

和以下配置在你的web.xml:

<servlet-mapping>
    <servlet-name>Jersey REST Service</servlet-name>
    <url-pattern>*</url-pattern>
</servlet-mapping>
<servlet>
    <servlet-name>Jersey REST Service</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>        
    <!-- Register resources and providers under com.vogella.jersey.first package. -->
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>your.webservices.package</param-value>
    </init-param>
    <init-param>
        <param-name>com.sun.jersey.spi.container.ContainerResponseFilters</param-name>
        <param-value>your.webservices.package.HeadersReponseFilter</param-value>
    </init-param>
    <async-supported>true</async-supported>
</servlet>

欢呼。:)