使用 Web 参考进行 HTTP 身份验证

Question

我有一个从 WSDL 创建的 Web 引用，但除非传入用户名/密码，否则不允许调用该函数； XML 工具包的原始代码是：

Set client = CreateObject("MSSOAP.SOAPClient30")
URL = "http://" & host & "/_common/webservices/Trend?wsdl"

client.mssoapinit (URL)

client.ConnectorProperty("WinHTTPAuthScheme") = 1
client.ConnectorProperty("AuthUser") = user
client.ConnectorProperty("AuthPassword") = passwd

On Error GoTo err
Dim result1() As String

result1 = client.getTrendData(expression, startDate, endDate, 
              limitFromStart, maxRecords

How do I add the AuthUser/AuthPassword to my new code?

新代码：

    ALCServer.TrendClient tc = new WindowsFormsApplication1.ALCServer.TrendClient();

    foreach(string s in tc.getTrendData(textBox2.Text, "5/25/2009", "5/28/2009", false, 500))
        textBox1.Text+= s;

Answer 1

发现：即使Preauthenticate==True，它也不会这样做。 您必须覆盖 WebRequest：

   protected override System.Net.WebRequest GetWebRequest(Uri uri)
    {
        HttpWebRequest request;
        request = (HttpWebRequest)base.GetWebRequest(uri);

        if (PreAuthenticate)
        {
            NetworkCredential networkCredentials =
                Credentials.GetCredential(uri, "Basic");

            if (networkCredentials != null)
            {
                byte[] credentialBuffer = new UTF8Encoding().GetBytes(
                    networkCredentials.UserName + ":" +
                    networkCredentials.Password);
                request.Headers["Authorization"] =
                    "Basic " + Convert.ToBase64String(credentialBuffer);
            }
            else
            {
                throw new ApplicationException("No network credentials");
            }
        }
        return request;
    }

由于它是作为分部类创建的，因此您可以将存根保留在单独的文件中，并且重建 Reference.cs 不会让您感到困扰。