编辑：我想回过头来注意问题根本不是我的问题，而是在另一方的代码中使用代码。
我正在尝试使用基本身份验证来启动页面。我一直收到404 Page not found错误。我可以将我的网址复制并粘贴到浏览器中并且工作正常（如果我没有登录到他们的网站，它会弹出一个凭据框，否则会打开我想要打开的内容）。我必须到正确的地方并进行身份验证，因为如果我一方面输入了错误的用户名/密码，我得到一个401（未经过身份验证的错误），如果我在查询字符串中传递了一个错误的参数，我会收到内部服务器错误500 。我尝试使用Webclient和HttpWebRequest都导致相同的404未找到错误。
使用Webclient：
string url = "MyValidURLwithQueryString";
WebClient client = new WebClient();
String userName = "myusername";
String passWord = "mypassword";
string credentials = Convert.ToBase64String(Encoding.ASCII.GetBytes(userName + ":" + passWord));
client.Headers[HttpRequestHeader.Authorization] = "Basic " + credentials;
var result = client.DownloadString(url);
Response.Write(result);
使用HttpWebRequest
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("MyValidURL");
string authInfo = "username:password";
authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));
request.Headers.Add("Authorization", "Basic " + authInfo);
request.Credentials = new NetworkCredential("username", "password");
request.Method = WebRequestMethods.Http.Get;
request.AllowAutoRedirect = true;
request.Proxy = null;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream stream = response.GetResponseStream();
StreamReader streamreader = new StreamReader(stream);
string s = streamreader.ReadToEnd();
Response.Write(s);
答案 0 :(得分：78)
//BEWARE
//This works ONLY if the server returns 401 first
//The client DOES NOT send credentials on first request
//ONLY after a 401
client.Credentials = new NetworkCredential(userName, passWord); //doesnt work
//So use THIS instead to send credentials RIGHT AWAY
string credentials = Convert.ToBase64String(
Encoding.ASCII.GetBytes(userName + ":" + password));
client.Headers[HttpRequestHeader.Authorization] = string.Format(
"Basic {0}", credentials);
答案 1 :(得分：23)
尝试将Web客户端请求身份验证部分更改为：
NetworkCredential myCreds = new NetworkCredential(userName, passWord);
client.Credentials = myCreds;
然后打电话，似乎对我来说很好。
答案 2 :(得分：11)
这部分代码对我来说很好：
module ALU_32 (iA, iB ,iCin ,ctrl, oCarry,oZero, out);
input [31:0] iA,iB;
output [31:0] out;
input iCin,ctrl;
output oCarry,oZero;
reg [31:0] out;
reg oCarry;
reg oZero;
always@ (ctrl)
begin
case(ctrl)
4'b0: out<=iA&iB;
4'b0001: out<=iA|iB;
4'b0010: {oCarry ,out}<=iA+iB;
4'b0011: out<=iA~|iB; //error
4'b0100:
begin
if(iA==iB)
out<=32'b1;
end
4'b0101: out<=iA-iB; //error
4'b0110: //error
begin
if(iA<iB)
out<=32'b1;
else
out<=32'b0;
end
4'b0111: out<=iA*iB; //error
4'b1000: out<=iA/iB; //error
end
always@(out)
begin
if(out==0)
oZero<=1;
end
endmodule
答案 3 :(得分：2)
如果它在您使用浏览器时工作，然后第一次传递您的用户名和密码 - 那么这意味着一旦身份验证完成，您的浏览器的请求标头将设置为所需的身份验证值，然后传递给每次向托管服务器发出请求时。
首先检查请求标头（这可以使用Web开发人员工具完成），一旦你在标头中建立了所需的内容，你就可以在你的HttpWebRequest标头中传递它。
摘要式身份验证示例：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.Text.RegularExpressions;
using System.Net;
using System.IO;
namespace NUI
{
public class DigestAuthFixer
{
private static string _host;
private static string _user;
private static string _password;
private static string _realm;
private static string _nonce;
private static string _qop;
private static string _cnonce;
private static DateTime _cnonceDate;
private static int _nc;
public DigestAuthFixer(string host, string user, string password)
{
// TODO: Complete member initialization
_host = host;
_user = user;
_password = password;
}
private string CalculateMd5Hash(
string input)
{
var inputBytes = Encoding.ASCII.GetBytes(input);
var hash = MD5.Create().ComputeHash(inputBytes);
var sb = new StringBuilder();
foreach (var b in hash)
sb.Append(b.ToString("x2"));
return sb.ToString();
}
private string GrabHeaderVar(
string varName,
string header)
{
var regHeader = new Regex(string.Format(@"{0}=""([^""]*)""", varName));
var matchHeader = regHeader.Match(header);
if (matchHeader.Success)
return matchHeader.Groups[1].Value;
throw new ApplicationException(string.Format("Header {0} not found", varName));
}
private string GetDigestHeader(
string dir)
{
_nc = _nc + 1;
var ha1 = CalculateMd5Hash(string.Format("{0}:{1}:{2}", _user, _realm, _password));
var ha2 = CalculateMd5Hash(string.Format("{0}:{1}", "GET", dir));
var digestResponse =
CalculateMd5Hash(string.Format("{0}:{1}:{2:00000000}:{3}:{4}:{5}", ha1, _nonce, _nc, _cnonce, _qop, ha2));
return string.Format("Digest username=\"{0}\", realm=\"{1}\", nonce=\"{2}\", uri=\"{3}\", " +
"algorithm=MD5, response=\"{4}\", qop={5}, nc={6:00000000}, cnonce=\"{7}\"",
_user, _realm, _nonce, dir, digestResponse, _qop, _nc, _cnonce);
}
public string GrabResponse(
string dir)
{
var url = _host + dir;
var uri = new Uri(url);
var request = (HttpWebRequest)WebRequest.Create(uri);
// If we've got a recent Auth header, re-use it!
if (!string.IsNullOrEmpty(_cnonce) &&
DateTime.Now.Subtract(_cnonceDate).TotalHours < 1.0)
{
request.Headers.Add("Authorization", GetDigestHeader(dir));
}
HttpWebResponse response;
try
{
response = (HttpWebResponse)request.GetResponse();
}
catch (WebException ex)
{
// Try to fix a 401 exception by adding a Authorization header
if (ex.Response == null || ((HttpWebResponse)ex.Response).StatusCode != HttpStatusCode.Unauthorized)
throw;
var wwwAuthenticateHeader = ex.Response.Headers["WWW-Authenticate"];
_realm = GrabHeaderVar("realm", wwwAuthenticateHeader);
_nonce = GrabHeaderVar("nonce", wwwAuthenticateHeader);
_qop = GrabHeaderVar("qop", wwwAuthenticateHeader);
_nc = 0;
_cnonce = new Random().Next(123400, 9999999).ToString();
_cnonceDate = DateTime.Now;
var request2 = (HttpWebRequest)WebRequest.Create(uri);
request2.Headers.Add("Authorization", GetDigestHeader(dir));
response = (HttpWebResponse)request2.GetResponse();
}
var reader = new StreamReader(response.GetResponseStream());
return reader.ReadToEnd();
}
}
然后你可以称之为：
DigestAuthFixer digest = new DigestAuthFixer(domain, username, password);
string strReturn = digest.GrabResponse(dir);
如果网址为：http://xyz.rss.com/folder/rss则域名为：http://xyz.rss.com（域名部分）目录：/文件夹/ rss（其余网址）
您也可以将其作为流返回并使用XmlDocument Load（）方法。