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我有一个java play框架2.4.x Web应用程序,提供JSON/HTTP API.当我运行我的前端HTML/JS file:///Users/nize/tmp/index.html在http://localhost:9000chrome show上调用API时

XMLHttpRequest cannot load http://localhost:9000. 
No 'Access-Control-Allow-Origin' header is present 
on the requested resource. Origin 'null' is therefore 
not allowed access. The response had HTTP status code 403.

我已根据Play Framework 2.4.x CORS文档中的说明配置了Web应用程序:

• 更新到 build.sbt
• 将类添加Filters.java到项目的根目录(也尝试过/app)

• 添加以下节到 application.conf

  play.filters.cors {allowedOrigins = ["*"," http:// localhost "] #allowedHttpMethods = ["GET","POST"] #allowedHttpHeaders = ["Accept"] #preflightMaxAge = 3 days}

我错过了什么？

编辑: 症状看起来与其他非常相似的stackoverflow帖子相同或类似.通过重新配置计算机上安装的Cisco AnyConnect VPN解决了该问题.但是,我没有安装该软件.