C++

Connect to FTP Through an HTTP Proxy

Demonstrates connecting through an HTTP proxy using HttpProxyHostname, HttpProxyPort, HttpProxyUsername, HttpProxyPassword, HttpProxyAuthMethod, and HttpProxyDomain.

Background: Many corporate networks force outbound traffic through an HTTP proxy, which reaches the FTP control connection via the CONNECT method — so the proxy must permit CONNECT to the FTP port. HttpProxyAuthMethod is Basic or NTLM, with HttpProxyDomain supplying the Windows domain for NTLM. This is distinct from a traditional FTP proxy, which speaks FTP itself.

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C++

#include <CkFtp2.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkFtp2 ftp;

    ftp.put_Hostname("ftp.example.com");
    ftp.put_Username("myFtpLogin");

    //  The HTTP proxy through which the FTP control connection is made.  Common ports are 8080 and
    //  3128.
    ftp.put_HttpProxyHostname("proxy.example.com");
    ftp.put_HttpProxyPort(8080);

    //  Proxy authentication, if required.  HttpProxyAuthMethod is "Basic" or "NTLM"; HttpProxyDomain
    //  is the Windows domain used for NTLM.
    ftp.put_HttpProxyUsername("myProxyLogin");
    ftp.put_HttpProxyPassword("myProxyPassword");
    ftp.put_HttpProxyAuthMethod("NTLM");
    ftp.put_HttpProxyDomain("CORP");

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    ftp.put_Password("myPassword");

    success = ftp.Connect();
    if (success == false) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Connected through the HTTP proxy." << "\r\n";

    success = ftp.Disconnect();
    if (success == false) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }
    }