HttpClient does not support preemptive authentication out of the box, but you can use a protocol interceptor to preemptively introduce an AuthScheme instance to the execution context.

HttpClient不支持开箱即用的先占式认证，但是您可以使用一个协议拦截器事先引入一个AuthScheme实例到执行上下文。

youdao

EBay responded with its own preemptive protest: The auctioneer pulled all its ads from Google's U.S. search results in retaliation for such behavior by a purported partner in other arenas.

而易趣以它先发制人的抗议作为回应：拍卖人将所有的广告从Google(美国)的搜索引擎中撤消，以此报复那些做出该举动的其他有嫌疑的合作者。

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The video game industry responded, Dyson says, and in a preemptive move created the Entertainment Software rating Board, which generates game ratings such as "e for Everyone."

但是，游戏产业先发制人，Dyson说，创建了娱乐软件分级制度，例如给一些游戏评为E级，代表老少皆宜的游戏。

youdao

At a news conference,Mr.Barak indicated the Jewish State is prepared to launch a preemptive strike on Iranian nuclear facilities.

VOA: standard.2009.07.27

The filing, in a nutshell, was a preemptive strike to try to prevent a potential legal strategy the union may use in a couple weeks.

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And unfortunately, I and others who warned at the time, who said, let the inspectors finish their work, you know, do not wage a preemptive war, use diplomacy, were just talking to a brick wall.

CNN: Transcript of Thursday's Democratic presidential debate

At times like this, there's only one thing Microsoft can do: launch a preemptive vaporware response.

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