(C) Restart/Resume FTP Download

Resume downloading a file from an FTP server.

Chilkat C/C++ Library Downloads
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#include <C_CkFtp2.h>

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

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    ftp = CkFtp2_Create();

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

    // Connect and login to the FTP server.
    success = CkFtp2_Connect(ftp);
    if (success != TRUE) {
        printf("%s\n",CkFtp2_lastErrorText(ftp));
        CkFtp2_Dispose(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));
        CkFtp2_Dispose(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));
        CkFtp2_Dispose(ftp);
        return;
    }

    success = CkFtp2_Disconnect(ftp);

    printf("File Downloaded!\n");


    CkFtp2_Dispose(ftp);

    }