WebClient 生成 (401) 未授权错误 [英] WebClient generates (401) Unauthorized error

问题描述

我在 Windows 服务中运行以下代码:

I have the following code running in a windows service:

WebClient webClient = new WebClient();
webClient.Credentials = new NetworkCredential("me", "12345", "evilcorp.com");
webClient.DownloadFile(downloadUrl, filePath);

每次，我都会收到以下异常

Each time, I get the following exception

{"The remote server returned an error: (401) Unauthorized."}

有以下内部例外:

{"The function requested is not supported"}

我确信凭据有效，事实上，如果我在 Web 浏览器中访问 downloadUrl 并将凭据输入为 evilcorp.comme，密码为 12345，则下载正常.

I know for sure the credentials are valid, in fact, if I go to downloadUrl in my web browser and put in my credentials as evilcorp.comme with password 12345, it downloads fine.

奇怪的是，如果我将凭据指定为 [e-mail] 和 12345，它似乎会失败.

What is weird though is that if I specify my credentials as [e-mail] with 12345, it appears to fail.

有没有办法格式化凭据?

Is there a way to format credentials?

推荐答案

显然，您运行的操作系统很重要，因为操作系统之间的默认加密已更改.此博客有更多详细信息:http://ferozedaud.blogspot.com/2009/10/ntlm-auth-fails-with.html

Apparently the OS you are running on matters, as the default encryption has changed between OSes. This blog has more details: http://ferozedaud.blogspot.com/2009/10/ntlm-auth-fails-with.html

这显然也在 stackoverflow 上讨论过:需要 407 身份验证- 没有发送挑战

This has apparently also been discussed on stackoverflow here: 407 Authentication required - no challenge sent

我建议先阅读博客，因为那里有精炼的知识.

I would suggest read the blog first as the distilled knowledge is there.

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