如何通过JavaScript访问HTTP请求标头字段？
我想在我的客户端JavaScript中捕获HTTP请求头字段，主要是Referer和User-Agent。我如何访问它们？
I want to capture the HTTP request header fields, primarily the Referer and User-Agent, within my client-side JavaScript. How may I access them?
Google Analytics设法通过JavaScript将您嵌入页面中的数据获取，所以它绝对有可能。
Google Analytics manages to get the data via JavaScript that they have you embed in you pages, so it is definitely possible.
如果您想访问referrer和user-agent，那些可用于客户端Javascript，但不能直接访问标题。
If you want to access referrer and user-agent, those are available to client-side Javascript, but not by accessing the headers directly.
要检索推荐人，请使用 document.referrer 。
要访问用户代理，请使用 navigator.userAgent 。
To retrieve the referrer, use document.referrer.
To access the user-agent, use navigator.userAgent.
其他人有籼稻ted，HTTP标头不可用，但你明确询问了referer和user-agent，它们可以通过Javascript获得。
As others have indicated, the HTTP headers are not available, but you specifically asked about the referer and user-agent, which are available via Javascript.