使用方法GET使用URLRequest / URLStream可以自定义标头？

Quite simple really:

非常简单:

var req:URLRequest=new URLRequest();
req.url="https://somesite.com";
var header:URLRequestHeader=new URLRequestHeader("my-bespoke-header","1");
req.requestHeaders.push(header);
req.method=URLRequestMethod.GET;
stream.load(req);
var req:URLReque