(Go) File Existence Check

Testing to see if a file exists on the FTP server. The GetSizeByName method is a convenient way to check if a file exists. It will return -1 if the file does not exist, otherwise it returns the size of the file in bytes.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    ftp := chilkat.NewFtp2()

    ftp.SetHostname("ftp.example.com")
    ftp.SetUsername("username")
    ftp.SetPassword("password")

    // Connect and login to the FTP server.
    success := ftp.Connect()
    if success != true {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }

    // Set the current remote directory to where the file is located:
    success = ftp.ChangeRemoteDir("something")
    if success != true {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }

    // Test to see if the file exists by getting the file size by name. 
    // If a -1 is returned, the file does not exist.
    fileSize := ftp.GetSizeByName("test123.txt")
    if fileSize < 0 {
        fmt.Println("file does not exist")
    }
    else {
        fmt.Println("file exists and is ", fileSize, " bytes in size")
    }

    success = ftp.Disconnect()

    ftp.DisposeFtp2()