golang ftp客户端示例 支持断点续传

package main

import (
    ftp4go "github.com/shenshouer/ftp4go"
    "fmt"
    "os"
)

var(
    downloadFileName    = "DockerToolbox-1.8.2a.pkg"
    BASE_FTP_PATH       = "/home/bob/"                  // base data path in ftp server
)

func main() {
    ftpClient := ftp4go.NewFTP(0) // 1 for debugging

    //connect
    _, err := ftpClient.Connect("172.8.4.101", ftp4go.DefaultFtpPort, "")
    if err != nil {
        fmt.Println("The connection failed")
        os.Exit(1)
    }
    defer ftpClient.Quit()

    _, err = ftpClient.Login("bob", "p@ssw0rd", "")
    if err != nil {
        fmt.Println("The login failed")
        os.Exit(1)
    }

    //Print the current working directory
    var cwd string
    cwd, err = ftpClient.Pwd()
    if err != nil {
        fmt.Println("The Pwd command failed")
        os.Exit(1)
    }
    fmt.Println("The current folder is", cwd)


    // get the remote file size
    size, err := ftpClient.Size("/home/bob/"+downloadFileName)
    if err != nil {
        fmt.Println("The Pwd command failed")
        os.Exit(1)
    }
    fmt.Println("size ", size)

    // start resume file download
    if err = ftpClient.DownloadResumeFile("/home/bob/"+downloadFileName, "/Users/goyoo/ftptest/"+downloadFileName, false); err != nil{
        panic(err)
    }

}