response.getHeader(name)

• name <string>
• 返回：<string>

读取已经排队但尚未发送给客户端的头信息。名称不区分大小写。

【Reads out a header that has already been queued but not sent to the client. The name is case-insensitive.】

const contentType = response.getHeader('content-type'); 拷贝