如何防止HttpClient发送连接头 [英] How to prevent HttpClient from sending the Connection header

问题描述

HttpClient默认将其包括为保持活动。我已经能够使用 httpClient.DefaultRequestHeaders.ConnectionClose = true; 将其设置为关闭，但是如何完全省略它？

HttpClient includes this as 'Keep-Alive' by default. I've been able to set it to 'Close' using httpClient.DefaultRequestHeaders.ConnectionClose = true; but how do I omit it altogether?

推荐答案

我以前从未见过这个问题，据我所知（甚至不是伟大的Jon Skeet ）都想出一种避免在 HttpClient Connection 标头的方法$ c>或 HttpWebRequest 的世界，而无需完全重新发明轮子。

I've seen this asked before and to my knowledge no one (not even the great Jon Skeet) has come up with a way to avoid sending the Connection header in the HttpClient or HttpWebRequest worlds without completely reinventing the wheel. It's happening somewhere very deep down in the weeds.

ConnectionClose 可以为空，但是在两个< HttpClient.DefaultRequestHeaders 和 HttpRequestMethod.Headers 仍会导致 Connection：保持活动

ConnectionClose is nullable, but setting it to null on both HttpClient.DefaultRequestHeaders AND HttpRequestMethod.Headers still results in a Connection: Keep-Alive header being sent.

总结：

• HttpRequestHeaders.ConnectionClose = true => 连接：close


• HttpRequestHeaders.ConnectionClose = false => 连接：保持活动



• HttpRequestHeaders.ConnectionClose = null => 连接：保持活动

• HttpRequestHeaders.ConnectionClose = true => Connection: close
• HttpRequestHeaders.ConnectionClose = false => Connection: Keep-Alive

• HttpRequestHeaders.ConnectionClose = null => Connection: Keep-Alive

HttpWebRequest.KeepAlive = true => 连接：保持活动

（ HttpWebRequest.KeepAlive 不能为空）

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