在Java Play Framework 2.2.x中启用CORS [英] Enable CORS in Java Play Framework 2.2.x

问题描述

我无法在Java Play 2.2.x中启用跨域

I am having trouble of enabling cross domain in Java Play 2.2.x

在Java Play 2.1.3中，此代码的工作原理是将其放在Global.java

In Java Play 2.1.3 this code works by putting it in Global.java

public class Global extends GlobalSettings {

  private class ActionWrapper extends Action.Simple {
    public ActionWrapper(Action action) {
     this.delegate = action;
  }

    @Override
    public Result call(Http.Context ctx) throws java.lang.Throwable {
      Result result = this.delegate.call(ctx);
      Http.Response response = ctx.response();
      response.setHeader("Access-Control-Allow-Origin", "*");
      return result;
    }
  }

  @Override
  public Action onRequest(Http.Request request, java.lang.reflect.Method actionMethod) {
    return new ActionWrapper(super.onRequest(request, actionMethod));
  }

}

但是当我试图编译java播放2.2.x，它不再编译。

But when I tried to compile on java play 2.2.x, it does not compile anymore.

编译错误消息：

Global.ActionWrapper是不抽象的，并且不会覆盖Action中的抽象方法调用（Context）...

Global.ActionWrapper is not abstract and does not override abstract method call(Context) in Action ...

有没有任何等效的代码为java play 2.2.x？

Is there any equivalent code for java play 2.2.x?

感谢。

推荐答案

它看起来像这样：

import play.GlobalSettings;
import play.libs.F.Promise;
import play.mvc.Action;
import play.mvc.Http;
import play.mvc.SimpleResult;

public class Global extends GlobalSettings {
    private class ActionWrapper extends Action.Simple {
        public ActionWrapper(Action<?> action) {
            this.delegate = action;
        }

        @Override
        public Promise<SimpleResult> call(Http.Context ctx) throws java.lang.Throwable {
            Promise<SimpleResult> result = this.delegate.call(ctx);
            Http.Response response = ctx.response();
            response.setHeader("Access-Control-Allow-Origin", "*");
            return result;
        }
    }

    @Override
    public Action<?> onRequest(Http.Request request, java.lang.reflect.Method actionMethod) {
        return new ActionWrapper(super.onRequest(request, actionMethod));
    }
}

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