使用HttpWebRequest(.NET)处理身份验证

我正在从VB应用程序访问REST Web服务.我创建一个HttpWebResponse对象并在其上调用GetRequestStream就好了,但是当我调用GetResponse时,我得到一个401异常.

这是我的代码(修改后发布)：

Dim webRequest = DirectCast(WebRequest.Create(endpoint), HttpWebRequest)
webRequest.Method = "POST"
webRequest.ContentLength = contentLength
webRequest.ContentType = "application/x-www-form-urlencoded"

request.Credentials = New NetworkCredential(Username, Password)

' Works fine
Using stream As Stream = webRequest.GetRequestStream()
    stream.Write(data, 0, data.Length)
End Using

' Barfs
Dim response As HttpWebResponse = DirectCast(webRequest.GetResponse(), HttpWebResponse)

一旦我调用“webRequest.GetResponse()”,我就会收到401异常.响应中有一个“WWW-Authenticate”标头,带有适当的域.我已经尝试设置“webRequest.PreAuthenticate = True”,以及使用“webRequest.Headers.Add(HttpRequestHeader.Authorization,_authheader)”手动设置标题.

我似乎无法使用Fiddler / Wireshark等监视这些请求,因为这是SSL流量,我确信有一种方法可以监控它,我还没有找到它.

提前致谢,

–Connor

Decrypting HTTPS-protected traffic with Fiddler