Unicode C++

Connect to FTP Through a SOCKS Proxy

Demonstrates connecting through a SOCKS proxy using SocksVersion, SocksHostname, SocksPort, SocksUsername, and SocksPassword.

Background: SOCKS is a general-purpose TCP relay, so it carries FTP transparently. SocksVersion is the switch — 0 disables it, while 4 or 5 selects the protocol. SOCKS5 supports username/password authentication and is the usual choice; SOCKS4 supports only a user identifier. Because FTP opens separate data connections, a SOCKS proxy combined with passive mode is generally the most reliable arrangement.

Chilkat Unicode C++ Downloads

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Unicode C++

#include <CkFtp2W.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkFtp2W ftp;

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

    //  SocksVersion selects the proxy: 0 (default) = none, 4 = SOCKS4, 5 = SOCKS5.
    ftp.put_SocksVersion(5);
    ftp.put_SocksHostname(L"socks.example.com");
    ftp.put_SocksPort(1080);

    //  SOCKS5 supports username/password authentication; SOCKS4 uses only a user identifier.
    ftp.put_SocksUsername(L"myProxyLogin");
    ftp.put_SocksPassword(L"myProxyPassword");

    //  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(L"myPassword");

    success = ftp.Connect();
    if (success == false) {
        wprintf(L"%s\n",ftp.lastErrorText());
        return;
    }

    wprintf(L"Connected through the SOCKS proxy.\n");

    success = ftp.Disconnect();
    if (success == false) {
        wprintf(L"%s\n",ftp.lastErrorText());
        return;
    }
    }