The length of the response header received the response status line and any extra control characters that are received as part of HTTP protocol.
回应标头的长度会接收回应状态列和 HTTP 通讯协定中所收到的任何额外控制字元。
That portion of a message terminated by an EOB or ETB line-control characters, if it is the last block in the message, by an EOT or ETX line-control character.
如果它是报文中最后一个 块，则用一个 传输 结束（EOT）或文本 结束（ETX）线路控制字 符来终止。
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