(C++) Restart/Resume FTP Upload

Demonstrates how to restart / resume an FTP upload.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

#include <CkFtp2.h>

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

    CkFtp2 ftp;

    ftp.put_Hostname("ftp.example.com");
    ftp.put_Username("login");
    ftp.put_Password("password");

    // Connect and login to the FTP server.
    bool success = ftp.Connect();
    if (success != true) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }

    // Change to the remote directory where the file will be uploaded.
    success = ftp.ChangeRemoteDir("temp");
    if (success != true) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }

    // In this example, assume that a previous FTP upload failed,
    // and the incomplete file (bigFile.zip) exists on the FTP server.
    // You only need to set the RestartNext property to resume
    // the upload.  When RestartNext is set, the next call
    // to PutFile (or PutFileFromBinaryData, PutFileFromTextData)
    // will automatically resume the upload from the point of failure.
    // (The way it works is that the FTP component sends a "SIZE"
    // command to the FTP server to find out how many bytes of
    // the file already exist on the server.  It then begins
    // uploading from that point.

    // Note: After PutFile is called, the RestartNext property
    // is automatically set to false.
    ftp.put_RestartNext(true);

    // Upload a file with restart.
    const char *localFilename = "bigFile.zip";
    const char *remoteFilename = "bigFile.zip";

    success = ftp.PutFile(localFilename,remoteFilename);
    if (success != true) {
        std::cout << ftp.lastErrorText() << "\r\n";
        return;
    }

    success = ftp.Disconnect();

    std::cout << "File Uploaded!" << "\r\n";
    }