C++

Get an FTP Listing Entry's Size (32-bit)

Demonstrates the Chilkat Ftp2.GetSize method, which returns the size in bytes of a cached directory-listing entry as a 32-bit integer. The only argument is a zero-based index. It returns -1 when the index is invalid or the size is unavailable.

Background: The size comes from the cached listing, so reading it for every entry costs no extra round trips. A 32-bit result cannot represent files past about 2 GB, so use GetSize64 (or GetSizeStr) when large files are possible. Directories often report no meaningful size and come back as -1, which is why the -1 case is worth handling rather than printing blindly.

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C++

#include <CkFtp2.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  Demonstrates the Ftp2.GetSize method, which returns the size in bytes of a cached
    //  directory-listing entry as a 32-bit integer.  The only argument is a zero-based index.

    CkFtp2 ftp;

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

    //  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;
    }

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

    //  GetDirCount retrieves the directory listing on the first call and returns the number of
    //  entries.  A negative return indicates failure.
    int n = ftp.GetDirCount();
    if (n < 0) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }

    int i;
    for (i = 0; i <= n - 1; i++) {
        const char *name = ftp.getFilename(i);

        //  GetSize returns -1 when the index is invalid or the size is unavailable (for example for a
        //  directory).  Use GetSize64 for files that may exceed 2 GB.
        int fileSize = ftp.GetSize(i);
        std::cout << name << "  " << fileSize << " bytes" << "\r\n";
    }

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