我的下面的代码在没有代理的计算机上运行得很好。但是在客户端服务器中,他们需要向FTP客户端(FileZilla)添加代理才能访问FTP。但是当我添加代理时,它说
使用代理时无法启用SSL。
FTP代理
var proxyAddress = ConfigurationManager.AppSettings["ProxyAddress"];
WebProxy ftpProxy = null;
if (!string.IsNullOrEmpty(proxyAddress))
{
var proxyUserId = ConfigurationManager.AppSettings["ProxyUserId"];
var proxyPassword = ConfigurationManager.AppSettings["ProxyPassword"];
ftpProxy = new WebProxy
{
Address = new Uri(proxyAddress, UriKind.RelativeOrAbsolute),
Credentials = new NetworkCredential(proxyUserId, proxyPassword)
};
}
FTP连接
var ftpRequest = (FtpWebRequest)WebRequest.Create(ftpAddress);
ftpRequest.Credentials = new NetworkCredential(
username.Normalize(),
password.Normalize()
);
ServicePointManager.ServerCertificateValidationCallback +=
(sender, cert, chain, sslPolicyErrors) => true;
ServicePointManager.Expect100Continue = false;
ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory;
ftpRequest.EnableSsl = true;
//ftpRequest.Proxy = ftpProxy;
var response = (FtpWebResponse)ftpRequest.GetResponse();
答案 0 :(得分:3)
.NET框架确实不支持代理上的TLS / SSL连接。
您必须使用第三方FTP库。
另请注意,您的代码未使用"隐式" FTPS。它正在使用" explicit" FTPS。 Implicit FTPS is not supported by .NET framework也是。
例如,使用WinSCP .NET assembly,您可以使用:
// Setup session options
SessionOptions sessionOptions = new SessionOptions
{
Protocol = Protocol.Ftp,
HostName = "example.com",
UserName = "user",
Password = "mypassword",
FtpSecure = FtpSecure.Explicit, // Or .Implicit
};
// Configure proxy
sessionOptions.AddRawSettings("ProxyMethod", "3");
sessionOptions.AddRawSettings("ProxyHost", "proxy");
using (Session session = new Session())
{
// Connect
session.Open(sessionOptions);
var listing = session.ListDirectory(path);
}
有关SessionOptions.AddRawSettings
的选项,请参阅raw settings。
(我是WinSCP的作者)