(C#) HTTP Authentication (Basic, NTLM, Digest, Negotiate/Kerberos)

演示如何使用HTTP身份验证。可以将身份验证添加到向服务器发送HTTP请求的任何方法，例如SynchronousRequest，QuickGetStr，PostXml等。要添加身份验证，只需设置“登录”和“密码”属性即可。

默认情况下，Chilkat将使用基本的HTTP身份验证，该身份验证通过连接发送登录名/密码明文。如果不使用SSL / TLS（即HTTPS），这将很糟糕。但是，如果连接是安全的，则使用基本身份验证应该没有任何问题。

Chilkat还支持更安全的身份验证类型，包括Digest，NTLM和Negotiate（可在NTLM和Kerberos之间动态选择）。要使用摘要式身份验证，只需将DigestAuth属性设置为true。要使用NTLM身份验证，请设置NtlmAuth属性= true。同样，要使用协商身份验证，请将NegotiateAuth属性设置为true。

重要：只有Windows平台上运行的Chilkat实现才支持协商身份验证。这是因为它是使用Microsoft的SSPI API在内部实现的。但是，由于Chilkat直接实现NTLM（即不将Microsoft SSPI用于基础实现），因此NTLM身份验证可用于所有受支持的操作系统。

Chilkat .NET Assemblies

Chilkat for .NET Core

Chilkat for Mono

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();

// Set the Login and Password properties for authentication.
http.Login = "chilkat";
http.Password = "myPassword";

// To use HTTP Basic authentication..
http.BasicAuth = true;

string html = http.QuickGetStr("http://localhost/xyz.html");
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

// Examine the HTTP status code returned.  
// A status code of 401 is typically returned for "access denied"
// if no login/password is provided, or if the credentials (login/password)
// are incorrect.
Debug.WriteLine("HTTP status code for Basic authentication: " + Convert.ToString(http.LastStatus));

// Examine the HTML returned for the URL:
Debug.WriteLine(html);

Chilkat.Http http2 = new Chilkat.Http();

// To use NTLM authentication, set the 
// NtlmAuth property = true
http2.NtlmAuth = true;

// The session log can be captured to a file by
// setting the SessionLogFilename property:
http2.SessionLogFilename = "ntlmAuthLog.txt";

// Examination of the HTTP session log will show the NTLM
// back-and-forth exchange between the client and server.

// This call will now use NTLM authentication (assuming it
// is supported by the web server).
html = http2.QuickGetStr("http://localhost/xyz.html");
// Note: 
if (http2.LastMethodSuccess != true) {
    Debug.WriteLine(http2.LastErrorText);
    return;
}

Debug.WriteLine("HTTP status code for NTLM authentication: " + Convert.ToString(http2.LastStatus));

Chilkat.Http http3 = new Chilkat.Http();

// To use Digest Authentication, set the DigestAuth property = true
// Also, no more than one of the authentication type properties 
// (NtlmAuth, DigestAuth, and NegotiateAuth)  should be set
// to true.  
http3.DigestAuth = true;

http3.SessionLogFilename = "digestAuthLog.txt";

// This call will now use Digest authentication (assuming it
// is supported by the web server).
html = http3.QuickGetStr("http://localhost/xyz.html");
if (http3.LastMethodSuccess != true) {
    Debug.WriteLine(http3.LastErrorText);
    return;
}

Debug.WriteLine("HTTP status code for Digest authentication: " + Convert.ToString(http3.LastStatus));