用JAX-RS/RESTEASY实现CORS的Ajax请求

Question

$.ajax({
      type: "get",
      url: "http://localhost:9080/myproject/services/mobile/list",
      crossDomain: true,
      cache: false,
      dataType: "json",
      success: function(response) {
        console.log(response);
      },
      error: function (jqXHR, textStatus, errorThrown) {
        console.log(textStatus);
        console.log(jqXHR.responseText);
        console.log(errorThrown);
        }
    });

@Path("/mobile")
@Provider
@ServerInterceptor
public class GroupMobile implements MessageBodyWriterInterceptor {

@Inject
private GroupDAO groupDAO;

@GET
@Path("/list")
@Produces(MediaType.APPLICATION_JSON)
public List<Group> getGroups() {
    return groupDAO.listAll();
}

@Override
public void write(MessageBodyWriterContext context) throws IOException,
        WebApplicationException {
    context.getHeaders().add("Access-Control-Allow-Origin", "*");
    context.proceed();
}

@OPTIONS
@Path("/{path:.*}")
public Response handleCORSRequest(
        @HeaderParam("Access-Control-Request-Method") final String requestMethod,
        @HeaderParam("Access-Control-Request-Headers") final String requestHeaders) {
    final ResponseBuilder retValue = Response.ok();

    if (requestHeaders != null)
        retValue.header("Access-Control-Allow-Headers", requestHeaders);

    if (requestMethod != null)
        retValue.header("Access-Control-Allow-Methods", requestMethod);

    retValue.header("Access-Control-Allow-Origin", "*");

    return retValue.build();
}
}

XMLHttpRequest cannot load http://localhost:9080/myproject/services/mobile/list?_=1359480354190. Origin http://MyIP:8080 is not allowed by Access-Control-Allow-Origin.

有人知道出了什么问题吗？

Answer 1

最新的resteasy(3.0.9-final)包括一个实用程序类org.jboss.resteasy.plugins.interceptors.corsfilter。

您可以将CorsFilter对象添加到应用程序的单例对象集中，或者直接将其添加到ResteasyDeployment中的ProviderFactory中。

下面是示例应用程序类：

import java.util.HashSet;
import java.util.Set;
import javax.ws.rs.ApplicationPath;

import org.jboss.resteasy.plugins.interceptors.CorsFilter;


@ApplicationPath("/api")
public class RestApplication extends javax.ws.rs.core.Application {
    Set<Object> singletons;

    @Override
    public Set<Class<?>> getClasses() {
        HashSet<Class<?>> clazzes = new HashSet<>();
        clazzes.add(VersionService.class);
        return clazzes;
    }

    @Override
    public Set<Object> getSingletons() {
        if (singletons == null) {
            CorsFilter corsFilter = new CorsFilter();
            corsFilter.getAllowedOrigins().add("*");

            singletons = new LinkedHashSet<Object>();
            singletons.add(corsFilter);
        }
        return singletons;
    }
}