Get an FTP Listing Entry's Last-Modified Time

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Demonstrates the Chilkat Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a cached directory-listing entry as an RFC 822 date-time string. The only argument is a zero-based index.

Background: The last-modified time is the workhorse timestamp: it updates whenever a file's contents change and is what sync and mirror logic compares to decide whether a file needs re-transferring. It is the most reliably reported of the three across FTP servers, and the RFC 822 string carries a timezone so comparisons are well defined.

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#include <C_CkFtp2.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkFtp2 ftp;
    int n;
    int i;
    const char *name;
    const char *lastModified;

    success = FALSE;

    //  Demonstrates the Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a
    //  cached directory-listing entry as an RFC 822 date-time string.  The only argument is a
    //  zero-based index.

    ftp = CkFtp2_Create();

    CkFtp2_putHostname(ftp,"ftp.example.com");
    CkFtp2_putUsername(ftp,"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.
    CkFtp2_putPassword(ftp,"myPassword");

    success = CkFtp2_Connect(ftp);
    if (success == FALSE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }

    success = CkFtp2_ChangeRemoteDir(ftp,"public_html");
    if (success == FALSE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }

    //  GetDirCount retrieves the directory listing on the first call and returns the number of
    //  entries.  A negative return indicates failure.
    n = CkFtp2_GetDirCount(ftp);
    if (n < 0) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }

    for (i = 0; i <= n - 1; i++) {
        name = CkFtp2_getFilename(ftp,i);

        //  The value is an RFC 822 string such as "Fri, 21 Nov 1997 09:55:06 -0600".
        lastModified = CkFtp2_getLastModifiedTimeStr(ftp,i);
        printf("%s  modified %s\n",name,lastModified);
    }

    success = CkFtp2_Disconnect(ftp);
    if (success == FALSE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(ftp);
        return;
    }



    CkFtp2_Dispose(ftp);

    }