(PureBasic) Restart/Resume FTP Download

Resume downloading a file from an FTP server.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkFtp2.pb"

Procedure ChilkatExample()

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

    ftp.i = CkFtp2::ckCreate()
    If ftp.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkFtp2::setCkHostname(ftp, "ftp.example.com")
    CkFtp2::setCkUsername(ftp, "login")
    CkFtp2::setCkPassword(ftp, "password")

    ; Connect and login to the FTP server.
    success.i = CkFtp2::ckConnect(ftp)
    If success <> 1
        Debug CkFtp2::ckLastErrorText(ftp)
        CkFtp2::ckDispose(ftp)
        ProcedureReturn
    EndIf

    ; 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::ckChangeRemoteDir(ftp,"temp")
    If success <> 1
        Debug CkFtp2::ckLastErrorText(ftp)
        CkFtp2::ckDispose(ftp)
        ProcedureReturn
    EndIf

    ; 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::setCkRestartNext(ftp, 1)

    localFilename.s = "big.zip"
    remoteFilename.s = "big.zip"

    ; Resume downloading...
    success = CkFtp2::ckGetFile(ftp,remoteFilename,localFilename)
    If success <> 1
        Debug CkFtp2::ckLastErrorText(ftp)
        CkFtp2::ckDispose(ftp)
        ProcedureReturn
    EndIf

    success = CkFtp2::ckDisconnect(ftp)

    Debug "File Downloaded!"


    CkFtp2::ckDispose(ftp)


    ProcedureReturn
EndProcedure