全局播放框架集响应 header

Question

如何为我的 playframework 项目全局设置响应 headers？我不想为每个 REST 方法添加内容。

    response().setHeader("Access-Control-Allow-Origin", "*");
    response().setHeader("Allow", "*");
    response().setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE, OPTIONS");
    response().setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Referer, User-Agent");

这是我目前添加到每个方法中的内容。

谢谢

Answer 1

Play 支持 filters，这是一种全局修改 HTTP requests/responses 的方式。

类似于：

public class GlobalHeaders extends Filter {

@Inject
public GlobalHeaders(Materializer mat) {
    super(mat);
}

@Override
public CompletionStage<Result> apply(
        Function<Http.RequestHeader, CompletionStage<Result>> nextFilter,
        Http.RequestHeader requestHeader) {
    return nextFilter.apply(requestHeader).thenApply(result -> {

        return result.setHeader("Access-Control-Allow-Origin", "*")
          .setHeader("Allow", "*")
          .setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE, OPTIONS")
          .setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Referer, User-Agent");
    });
}

}

Answer 2

2.8 的另一种方式是这样的：https://www.playframework.com/documentation/2.8.x/JavaActionsComposition

你实现了一个注解：

@With(VerboseAnnotationAction.class)
@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface VerboseAnnotation {
  boolean someValue() default true;
}

和一个动作：

public class VerboseAnnotationAction extends Action<VerboseAnnotation> {
  public CompletionStage<Result> call(Http.Request req) {
    // This is you're taking value from the annotation
    boolean parameterValue = configuration.someValue();

    // decorate the response after calling the controller
    return delegate.call(req)
       .thenApply(r -> r.withHeader("SomeHeaderName", parameterValue));
  }
}

那么你只需将注释与方法或整个控制器一起使用 class:

@VerboseAnnotation(false)
public Result verboseAnnotationIndex() {
  return ok("It works!");
}

全局播放框架集响应 header

playframwork set response header globally

java

httpresponse

playframework