ruby - 使用 Rack (Access-Control-Allow-Origin) 发送两个相同的 header

Question

如何使用 Rack 兼容应用程序设置多个 Access-Control-Allow-Origin header 。

规范说我应该返回 [status, headers, body] 数组作为结果。 header 是 header 的散列:)。所以我不能设置相同的标题两次。

headers = {}
headers["Access-Control-Allow-Origin"] = "http://my.domain1.com"
headers["Access-Control-Allow-Origin"] = "http://my.domain2.com"

永远行不通。

我的情况应该怎么办？如何发送两个相同的 header ？

Answer 1

使用数组散列是很常见的，所以尝试:

headers = {
  "Access-Control-Allow-Origin" => %w[
    http://my.domain1.com
    http://my.domain2.com
  ]
}

---

I've got a guess that it should be { "Access-Control-Allow-Origin" => [ 'a', 'b' ] * "\n" }

查看the RFC ，相关部分是“5.1 Access-Control-Allow-Origin Response Header ”，即 points to :

The Origin header field has the following syntax:

origin              = "Origin:" OWS origin-list-or-null OWS
origin-list-or-null = %x6E %x75 %x6C %x6C / origin-list
origin-list         = serialized-origin *( SP serialized-origin )
serialized-origin   = scheme "://" host [ ":" port ]
                    ; <scheme>, <host>, <port> from RFC 3986

那么，试试:

[ 'a', 'b' ] * ";"

或者，for the uninitiated :

%w[a b].join(';')