无法获取request.referer返回nil以外的值

Question

So far I have been unable to get request.referer to return the refering URL (which in this case would point to the first method). I used both mobile and desktop browers (Firefox, Opera, Safari, Chrome) and so far have been unable to get a non-nil value returned.

def first
  redirect_to test_path
end


def second
  @r = request.referer
end

Answer 1

使用此作为参考：

request.env["HTTP_REFERER"]