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

问题描述

我在Windows服务中运行以下代码：

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

每次我收到以下异常

  {远程服务器返回错误：（401）未经授权。
  

具有以下内部异常：

  {不支持请求的功能} 
  

我知道凭据有效，实际上，如果我在我的网页浏览器中下载downloadrr并放入我的凭证为evilcorp.com \me，密码为12345，它下载得很好。

有什么奇怪的是，如果我用12345指定我的凭证为[e-mail] ，它似乎失败了。

有没有办法格式化凭证？

解决方案>

显然，您正在运行的操作系统是重要的，因为默认加密在操作系统之间已更改。
这个博客有更多的细节： http：// ferozedaud.blogspot.com/2009/10/ntlm-auth-fails-with.html

这显然也在stackoverflow上讨论过： 407需要验证 - 不发送任何挑战

我建议先阅读博客，因为蒸馏的知识就在那里。

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);

Each time, I get the following exception

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

With the following inner exception:

{"The function requested is not supported"}

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.com\me with password 12345, it downloads fine.

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

Is there a way to format credentials?

解决方案

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

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

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

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