哪些特定的状态代码导致HttpWebRequest.GetResponse()引发WebException? [英] Which specific status codes cause a WebException to be thrown by HttpWebRequest.GetResponse()?

问题描述

我已经寻找了一些明确的文档，但是运气不好.

I've hunted around for some definitive documentation on this but haven't had much luck finding any.

在执行类似POST的操作后，HttpWebRequest.GetResponse()将针对哪些HTTP响应状态代码生成WebException?

For which HTTP Response Status codes will HttpWebRequest.GetResponse() generate a WebException after doing something like a POST?

具体地说，它将为状态200 OK以外的其他内容生成WebException吗?还是只会生成WebException来表示400、404和500(出于争论的目的)?

Specifically, will it generate a WebException for anything other than status 200 OK? Or will it only generate a WebException for say, 400, 404, and 500 (for the sake of argument)?

我想知道，因为我正在与之通信的服务器定义了除HTTP 200 OK以外的其他任何内容，它们会作为错误条件返回.我可以依靠WebException生成200以外的任何东西吗?

I want to know since the server I'm communicating with defines anything other than HTTP 200 OK coming back as an error condition. Can I rely on a WebException being generated for anything other than 200?

我目前已经编写了代码，每次都要检查返回状态代码，并确保它为200 OK.如果不是这样，将采取适当的措施—但是对于我希望清除的WebException，该代码与catch块之间有很多重复.

I've currently written my code to check the return status code every time and ensure it's 200 OK. If it's not, it will take appropriate action—but there's a lot of duplication between that code and the catch block for a WebException that I'm hoping to clean up.

与文档相关的任何链接将不胜感激.

Any relevant links to documentation would be most appreciated.

推荐答案

最终在响应&捕获并检查WebExceptions；导致某些代码重复，但是对于状态不是200的WebException是否总是发生，没有明确的答案.

Ended up doing an explicit check after the response & catching and checking WebExceptions; results in some duplicated code but there's no definitive answer on whether a WebException will ALWAYS occur if the status is NOT 200.

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