之前有个业务需要把文件上传到ftp服务器，写了一个上传ftp的功能

package ftpimport "context"type Client interface {// UploadFile 上传文件UploadFile(ctx context.Context, opt *UploadFileOpt) error
}type UploadFileOpt struct {Data           []byteRemoteFileName stringDir            string
}

package ftpimport ("bytes""context""github.com/jlaffaye/ftp"
)// FtpClient 结构体包含 FTP 客户端的配置信息
type FtpClient struct {Addr       stringName       stringPwd        stringDir        stringConnection *ftp.ServerConn
}// NewFtpClient 创建一个新的 FtpClient 实例
func NewFtpClient(addr, name, pwd, dir string) Client {return &FtpClient{Addr: addr,Name: name,Pwd:  pwd,Dir:  dir,}
}// Connect 连接到 FTP 服务器
func (c *FtpClient) Connect() error {conn, err := ftp.Dial(c.Addr)if err != nil {return err}err = conn.Login(c.Name, c.Pwd)if err != nil {return err}c.Connection = connreturn nil
}// Disconnect 断开与 FTP 服务器的连接
func (c *FtpClient) Disconnect() {if c.Connection != nil {c.Connection.Quit()}
}// UploadFile 上传文件到 FTP 服务器，接受文件内容的 []byte 数组
func (c *FtpClient) UploadFile(ctx context.Context, opt *UploadFileOpt) error {if c.Addr == "" {return nil}// 连接到 FTP 服务器err := c.Connect()if err != nil {return err}defer c.Disconnect()uploadDir := c.Dirif opt.Dir != "" {uploadDir = opt.Dir}// 切换到指定目录err = c.Connection.ChangeDir(uploadDir)if err != nil {return err}// 上传文件err = c.Connection.Stor(opt.RemoteFileName, bytes.NewReader(opt.Data))if err != nil {return err}return nil
}