Restart/Resume FTP Download

Resume downloading a file from an FTP server.

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#include <C_CkFtp2.h>

void ChilkatSample(void)
    {
    HCkFtp2 ftp;
    BOOL success;
    const char * localFilename;
    const char * remoteFilename;

    ftp = CkFtp2_Create();

    //  Any string unlocks the component for the 1st 30-days.
    success = CkFtp2_UnlockComponent(ftp,"Anything for 30-day trial");
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        return;
    }

    CkFtp2_putHostname(ftp,"ftp.chilkatsoft.com");
    CkFtp2_putUsername(ftp,"****");
    CkFtp2_putPassword(ftp,"****");

    //  Connect and login to the FTP server.
    success = CkFtp2_Connect(ftp);
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        return;
    }

    //  Change to the remote directory where the file is located.
    //  This step is only necessary if the file is not in the root directory
    //  for the FTP account.
    success = CkFtp2_ChangeRemoteDir(ftp,"temp");
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        return;
    }

    //  To resume a download, it is assumed that the partial file
    //  is already present on the local filesystem.
    //  You only need to set the RestartNext property to resume
    //  the download.  The Chilkat FTP component sets the resume
    //  point by getting the existing size of the target (local) file.
    CkFtp2_putRestartNext(ftp,TRUE);

    localFilename = "big.zip";

    remoteFilename = "big.zip";

    //  Resume downloading...
    success = CkFtp2_GetFile(ftp,remoteFilename,localFilename);
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        return;
    }

    CkFtp2_Disconnect(ftp);

    printf("File Downloaded!\n");

    CkFtp2_Dispose(ftp);

    }