Golang使用ftp上传文件

go get -u github.com/jlaffaye/ftp

package main

import (
	"bytes"
	"fmt"
	"github.com/jlaffaye/ftp"
	"os"
	"time"
)

const (
	ftpDirectoryExistsErrorCode = 550
)

func main() {
	// 连接到FTP服务器，注意：不要写协议 ftp://，需要写端口 21
	connection, err := ftp.Dial("ftp.example.com:21", ftp.DialWithTimeout(5*time.Second))
	if err != nil {
		fmt.Println(err)
		return
	}

	// 登录
	err = connection.Login("username", "password")
	if err != nil {
		fmt.Println(err)
		return
	}

	// 打开要上传的文件
	file, err := os.Open("local-file.txt")
	if err != nil {
		fmt.Println(err)
		return
	}
	defer file.Close()

	// 上传文件
    destPath := "/path/on/ftp/server/remote-file.txt"
    err = mkdirAll(connection, destPath)
    if err != nil {
        fmt.Println(err)
		return
    }

	err = connection.Stor(destPath, file)
	if err != nil {
		fmt.Println(err)
		return
	}

	// 退出
	err = connection.Quit()
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println("File uploaded successfully.")
}

// 递归创建目录
func mkdirAll(c *ftp.ServerConn, path string) error {
	paths := strings.Split(path, "/")
	currentPath := ""
	for _, p := range paths {
		if p == "" {
			continue
		}
		currentPath += "/" + p
        if err := ftp.connection.MakeDir(currentPath); err != nil {
			textProtoErr, ok := err.(*textproto.Error)
			if !ok {
				return err
			}
			if textProtoErr.Code == ftpDirectoryExistsErrorCode {
                // 已经存在，不需要创建
				continue
			}
			return err
		}
	}
	return nil
}