C# 使用SFTP的上传下载文件时如何使用代理

最近遇到一个需求，使用SFTP上传下载文件，由于安全性，需要使用内部代理，在网上找了下，未找到相关代码。就自己整理了一份，实现原理基于

 Tamir.SharpSsh.jsch;  部分代码仅供参考。

 

using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using Tamir.SharpSsh;
using Tamir.SharpSsh.jsch;

namespace GetFileFromFTP
{



    class SFTPHelper
    {


        private Session m_session;
        //代理地址
        string ProxyHost = ConfigurationSettings.AppSettings["ProxyHost"].ToString();
        //代理端口
        string ProxyPort = ConfigurationSettings.AppSettings["ProxyPort"].ToString();
        //代理用户名
        string ProxyUser = ConfigurationSettings.AppSettings["ProxyUser"].ToString();
        //代理密码
        string ProxyPwd = ConfigurationSettings.AppSettings["ProxyPwd"].ToString();
        private Channel m_channel;

        private ChannelSftp m_sftp;
        private static readonly string defRemotePath = "/";//默认操作是都是从根目录开始。


        //host:sftp地址   user：用户名   pwd：密码          

        public SFTPHelper(string ip, string port, string user, string pwd)
        {



            try
            {
                int serverport = Int32.Parse(port);



                JSch jsch = new JSch();


                m_session = jsch.getSession(user, ip, serverport);

                ProxyHTTP proxyhttp = new ProxyHTTP(ProxyHost, Convert.ToInt32(ProxyPort));
                proxyhttp.setUserPasswd(ProxyUser, ProxyPwd);
                m_session.setProxy(proxyhttp);

                MyUserInfo ui = new MyUserInfo();

                ui.setPassword(pwd);

                m_session.setUserInfo(ui);
            }
            catch (Exception ex)
            {
                
                
            }

          

        }



        //SFTP连接状态          

        public bool Connected { get { return m_session.isConnected(); } }



        //连接SFTP          

        public bool Connect()
        {

            try
            {

                if (!Connected)
                {

                    m_session.connect();

                    m_channel = m_session.openChannel("sftp");

                    m_channel.connect();

                    m_sftp = (ChannelSftp)m_channel;

                }

                return true;

            }

            catch (Exception ex)
            {



                return false;

            }

        }



        //断开SFTP          

        public void Disconnect()
        {

            if (Connected)
            {

                m_channel.disconnect();

                m_session.disconnect();

            }

        }



        //SFTP存放文件          

        public bool Put(string localPath, string remotePath)
        {

            try
            {

                Connect();

                if (this.Connected)
                {

                    Tamir.SharpSsh.java.String src = new Tamir.SharpSsh.java.String(localPath);

                    Tamir.SharpSsh.java.String dst = new Tamir.SharpSsh.java.String(remotePath);


                    m_sftp.put(src, dst);


                    return true;

                }

            }

            catch (Exception ex)
            {
                WriteLog("文件：" + localPath + "上传失败，失败原因：" + ex.Message + "--" + ex.StackTrace);


                return false;

            }

            return false;

        }

        /// <summary>
        /// 记录日志
        /// </summary>
        private void WriteLog(string msg)
        {
            string sql = "INSERT INTO [dbo].[O_Log]  ([L_Type],[UserID],[CreateTime])VALUES('" + msg + "','admin','" + DateTime.Now + "'";
            SqlHelper.ExecuteSql(sql);
        }

        //SFTP获取文件          



        public bool Get(string remotePath, string localPath)
        {
            try
            {
                //string fullRemotePath = defRemotePath + remotePath.TrimStart('/');
                Tamir.SharpSsh.java.String src = new Tamir.SharpSsh.java.String(remotePath);
                Tamir.SharpSsh.java.String dst = new Tamir.SharpSsh.java.String(localPath);
                m_sftp.get(src, dst);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }

        //删除SFTP文件  

        public bool Delete(string remoteFile)
        {

            try
            {

                m_sftp.rm(remoteFile);

                return true;

            }

            catch
            {

                return false;

            }

        }



        //获取SFTP文件列表          

        public ArrayList GetFileList(string remotePath, string fileType)
        {

            try
            {

                Tamir.SharpSsh.java.util.Vector vvv = m_sftp.ls(remotePath);

                ArrayList objList = new ArrayList();

                foreach (Tamir.SharpSsh.jsch.ChannelSftp.LsEntry qqq in vvv)
                {

                    string sss = qqq.getFilename();

                    if (sss.Length > (fileType.Length + 1) && fileType == sss.Substring(sss.Length - fileType.Length))

                    { objList.Add(sss); }

                    else { continue; }

                }



                return objList;

            }

            catch
            {

                return null;

            }

        }



    }



    //登录验证信息          

    public class MyUserInfo : UserInfo
    {

        String passwd;



        public String getPassword() { return passwd; }

        public void setPassword(String passwd) { this.passwd = passwd; }



        public String getPassphrase() { return null; }

        public bool promptPassphrase(String message) { return true; }



        public bool promptPassword(String message) { return true; }

        public bool promptYesNo(String message) { return true; }

        public void showMessage(String message) { }



    }

}