Imports FluentFTP

Public Class FtpService
    Private _ftpUser As String
    Private _ftpPwd As String
    Private _ftpPort As Integer
    Private _ftpHost As String

    Sub New(host As String, port As Integer, user As String, pwd As String)
        _ftpHost = host
        _ftpPort = port
        _ftpUser = user
        _ftpPwd = pwd
    End Sub

    Private Sub OnValidateCertificate(control As FtpClient, e As FtpSslValidationEventArgs)
        e.Accept = True
    End Sub

    ''' <summary>
    ''' 文件上传,覆盖式上传,文件夹不存在则回创建文件夹
    ''' </summary>
    Public Sub UploadFile(remotePath As String, loadPath As String)
        Using ftpClient As New FtpClient(_ftpHost, _ftpPort, _ftpUser, _ftpPwd)
            AddHandler ftpClient.ValidateCertificate, AddressOf OnValidateCertificate
            ftpClient.EncryptionMode = FtpEncryptionMode.Auto

            ftpClient.Connect()
            ftpClient.UploadFile(loadPath, remotePath, FtpRemoteExists.Overwrite, True)
            ftpClient.Disconnect()
        End Using
    End Sub


    ''' <summary>
    ''' 文件下载
    ''' 从FTP下载压缩包，到本地指定路径
    ''' </summary>
    Public Sub DownloadFile(remotePath As String, loadPath As String)
        Using ftpClient As New FtpClient(_ftpHost, _ftpPort, _ftpUser, _ftpPwd)
            AddHandler ftpClient.ValidateCertificate, AddressOf OnValidateCertificate
            ftpClient.EncryptionMode = FtpEncryptionMode.Auto

            ftpClient.Connect()
            ftpClient.DownloadFile(loadPath, remotePath)
            ftpClient.Disconnect()
        End Using
    End Sub


End Class