outgoingMessage.appendHeader(name, value)

• name <string> 标头名称

  ¥name <string> Header name

• value <string> | <string[]> 标头值

  ¥value <string> | <string[]> Header value

• 返回：<this>

  ¥Returns: <this>

为标头对象附加单一个标头值。

¥Append a single header value for the header object.

如果值为数组，则相当于多次调用该方法。

¥If the value is an array, this is equivalent of calling this method multiple times.

如果标头没有先前的值，则这相当于调用 outgoingMessage.setHeader(name, value)。

¥If there were no previous value for the header, this is equivalent of calling outgoingMessage.setHeader(name, value).

根据创建客户端请求或服务器时 options.uniqueHeaders 的值，这将导致标头多次发送或单次发送，并使用 ; 连接值。

¥Depending of the value of options.uniqueHeaders when the client request or the server were created, this will end up in the header being sent multiple times or a single time with values joined using ; .