使用Play Framework资产控制器返回资产时需要添加标头

问题描述

我需要返回带有标题的pdf文件

I need to return pdf files with the header

X-Robots-Tag: noindex

https: //developers.google.com/webmasters/control-crawl-index/docs/robots_meta_tag?hl=de#robots-meta-tag-verwenden

是否可以使用标准播放的Assets Controller执行此操作?看一下源代码，似乎唯一可配置的是:

Is there a way to do this using the standard play Assets Controller? Took a look inside the source code and the only thing that seems to be configurable is:

val configuredCacheControl = config(_.getString("\"assets.cache." + name + "\""))

谢谢

推荐答案

我可能会接受 Kris 的想法.像这样的事情应该可以带您去那里，基本上我要做的就是利用Play！提供静态资源但在结果中添加标头的控制器:

I might go with Kris's idea. Something kinda like this should get you part of the way there, basically all I'm doing is leveraging the Play! Controller that serves static resources but adding a header to the result:

object AssetsController extends Controller {

def modifiedAsset(path: String, file: String): Future[Result] = Async.action { implicit request =>
  Assets.at(path, file)(request).map { result =>
   result.withHeaders(("X-Robots-Tag", "noindex"))
  }
}

然后将您的routes文件需要从controllers.Assets.at(path="/public", file)修改为controllers.AssetsController.modifiedAsset(path="/public", file)

Then your routes file would need to be modified from controllers.Assets.at(path="/public", file) to controllers.AssetsController.modifiedAsset(path="/public", file)

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