前一段时间,自己找过FTP上传的示例花了一点时间。找到的工具类大部分都是FTPFactory.cs这个类,而有意思的是FTPFactory.cs居然用FTPClient.cs(谁写的我不知道,一个基于TCP协议的FTP上传的工具类,写的人是一个牛人,这个类做的很规范)来实现的,而作者却没有提供FTPClient.cs这个类的源码,显然是一篇不负责任的文章。
这里,我将上传文件的过程整理一下,写下这篇博客,以期为需要的朋友提供便利。
首先,你需要一个测试环境,我在自己的机器上搭建了一个FTP Server,搭建Server有一些比较优秀的软件,例如:Crob FTP Server,不过这是一个收费软件,虽然提供试用版,但要在公网上使用的话,还是买个注册号吧!
下载地址: Crob FTP Server V3.7.0 Build 196 简体中文版 http://www.skycn.com/soft/11246.html
中文软件,大家都是学技术的,怎么搭建我就不说了。
相当傻瓜式的,上传代码只有寥寥几行:
- FTPClient fc = new FTPClient();
- fc.RemoteHost = "10.6.133.145";
- fc.RemotePath = "/u01/upload";
- fc.RemotePort = 21;
- fc.RemoteUser = "admin";
- fc.RemotePass = "123";
- fc.Connect();
- fc.Put("c:/1.txt");
- fc.DisConnect();
这里要注意的是,虚拟目录/u01/upload对应的路径需要有写文件操作的权限,你可以在属性中配置账号的写权限(我直接共享了该文件夹,并允许everyone账号完全控制)。
这里提供FTPClient.cs的源码,来源一时半会儿找不到了:
- using System;
- using System.Net;
- using System.Net.Sockets;
- using System.Text;
- using System.IO;
- namespace TimerServer
- {
-
-
-
- public class FTPClient
- {
- #region 构造函数
- /// <summary>
-
-
- public FTPClient()
- {
- strRemoteHost = "";
- strRemotePath = "";
- strRemoteUser = "";
- strRemotePass = "";
- strRemotePort = 21;
- bConnected
- = false;
- }
- /// <summary>
-
-
-
-
-
-
-
- public FTPClient( string remoteHost, string remotePath, string remoteUser, string remotePass, int remotePort )
- {
- strRemoteHost = remoteHost;
- strRemotePath = remotePath;
- strRemoteUser = remoteUser;
- strRemotePass = remotePass;
- strRemotePort = remotePort;
- Connect();
- }
- #endregion
- #region 登陆
- /// <summary>
-
-
- private string strRemoteHost;
- public string RemoteHost
- {
- get
- {
- return strRemoteHost;
- }
- set
- {
- strRemoteHost = value;
- }
- }
- /// <summary>
-
-
- private int strRemotePort;
- public int RemotePort
- {
- get
- {
- return strRemotePort;
- }
- set
- {
- strRemotePort = value;
- }
- }
- /// <summary>
-
-
- private string strRemotePath;
- public string RemotePath
- {
- get
- {
- return strRemotePath;
- }
- set
- {
- strRemotePath = value;
- }
- }
- /// <summary>
-
-
- private string strRemoteUser;
- public string RemoteUser
- {
- set
- {
- strRemoteUser = value;
- }
- }
- /// <summary>
-
-
- private string strRemotePass;
- public string RemotePass
- {
- set
- {
- strRemotePass = value;
- }
- }
- /// <summary>
-
-
- private Boolean bConnected;
- public bool Connected
- {
- get
- {
- return bConnected;
- }
- }
- #endregion
- #region 链接
- /// <summary>
-
-
- public void Connect()
- {
- socketControl = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
- IPEndPoint ep = new IPEndPoint(IPAddress.Parse(RemoteHost), strRemotePort);
-
- try
- {
- socketControl.Connect(ep);
- }
- catch(Exception)
- {
- throw new IOException("Couldn't connect to remote server");
- }
-
- ReadReply();
- if(iReplyCode != 220)
- {
- DisConnect();
- throw new IOException(strReply.Substring(4));
- }
-
- SendCommand("USER "+strRemoteUser);
- if( !(iReplyCode == 331 || iReplyCode == 230) )
- {
- CloseSocketConnect();
- throw new IOException(strReply.Substring(4));
- }
- if( iReplyCode != 230 )
- {
- SendCommand("PASS "+strRemotePass);
- if( !(iReplyCode == 230 || iReplyCode == 202) )
- {
- CloseSocketConnect();
- throw new IOException(strReply.Substring(4));
- }
- }
- bConnected = true;
-
- ChDir(strRemotePath);
- }
-
- /// <summary>
-
-
- public void DisConnect()
- {
- if( socketControl != null )
- {
- SendCommand("QUIT");
- }
- CloseSocketConnect();
- }
- #endregion
- #region 传输模式
- /// <summary>
-
-
- public enum TransferType {Binary,ASCII};
- /// <summary>
-
-
-
- public void SetTransferType(TransferType ttType)
- {
- if(ttType == TransferType.Binary)
- {
- SendCommand("TYPE I");
- }
- else
- {
- SendCommand("TYPE A");
- }
- if (iReplyCode != 200)
- {
- throw new IOException(strReply.Substring(4));
- }
- else
- {
- trType = ttType;
- }
- }
- /// <summary>
-
-
-
- public TransferType GetTransferType()
- {
- return trType;
- }
-
- #endregion
- #region 文件操作
- /// <summary>
-
-
-
-
- public string[] Dir(string strMask)
- {
-
- if(!bConnected)
- {
- Connect();
- }
-
- Socket socketData = CreateDataSocket();
-
- SendCommand("NLST " + strMask);
-
- if(!(iReplyCode == 150 || iReplyCode == 125 || iReplyCode == 226))
- {
- throw new IOException(strReply.Substring(4));
- }
-
- strMsg = "";
- while(true)
- {
- int iBytes = socketData.Receive(buffer, buffer.Length, 0);
- strMsg += ASCII.GetString(buffer, 0, iBytes);
- if(iBytes < buffer.Length)
- {
- break;
- }
- }
- char[] seperator = {'/n'};
- string[] strsFileList = strMsg.Split(seperator);
- socketData.Close();
- if(iReplyCode != 226)
- {
- ReadReply();
- if(iReplyCode != 226)
- {
- throw new IOException(strReply.Substring(4));
- }
- }
- return strsFileList;
- }
-
- /// <summary>
-
-
-
-
- private long GetFileSize(string strFileName)
- {
- if(!bConnected)
- {
- Connect();
- }
- SendCommand("SIZE " + Path.GetFileName(strFileName));
- long lSize=0;
- if(iReplyCode == 213)
- {
- lSize = Int64.Parse(strReply.Substring(4));
- }
- else
- {
- throw new IOException(strReply.Substring(4));
- }
- return lSize;
- }
- /// <summary>
-
-
-
- public void Delete(string strFileName)
- {
- if(!bConnected)
- {
- Connect();
- }
- SendCommand("DELE "+strFileName);
- if(iReplyCode != 250)
- {
- throw new IOException(strReply.Substring(4));
- }
- }
-
- /// <summary>
-
-
-
-
- public void Rename(string strOldFileName,string strNewFileName)
- {
- if(!bConnected)
- {
- Connect();
- }
- SendCommand("RNFR "+strOldFileName);
- if(iReplyCode != 350)
- {
- throw new IOException(strReply.Substring(4));
- }
-
- SendCommand("RNTO "+strNewFileName);
- if(iReplyCode != 250)
- {
- throw new IOException(strReply.Substring(4));
- }
- }
- #endregion
- #region 上传和下载
- /// <summary>
-
-
-
-
- public void Get(string strFileNameMask,string strFolder)
- {
- if(!bConnected)
- {
- Connect();
- }
- string[] strFiles = Dir(strFileNameMask);
- foreach(string strFile in strFiles)
- {
- if(!strFile.Equals(""))
- {
- Get(strFile,strFolder,strFile);
- }
- }
- }
-
- /// <summary>
-
-
-
-
-
- public void Get(string strRemoteFileName,string strFolder,string strLocalFileName)
- {
- if(!bConnected)
- {
- Connect();
- }
- SetTransferType(TransferType.Binary);
- if (strLocalFileName.Equals(""))
- {
- strLocalFileName = strRemoteFileName;
- }
- if(!File.Exists(strFolder + "//" +strLocalFileName))
- {
- Stream st = File.Create(strFolder + "//" +strLocalFileName);
- st.Close();
- }
- FileStream output = new
- FileStream(strFolder + "//" + strLocalFileName,FileMode.Create);
- Socket socketData = CreateDataSocket();
- SendCommand("RETR " + strRemoteFileName);
- if(!(iReplyCode == 150 || iReplyCode == 125
- || iReplyCode == 226 || iReplyCode == 250))
- {
- throw new IOException(strReply.Substring(4));
- }
- while(true)
- {
- int iBytes = socketData.Receive(buffer, buffer.Length, 0);
- output.Write(buffer,0,iBytes);
- if(iBytes <= 0)
- {
- break;
- }
- }
- output.Close();
- if (socketData.Connected)
- {
- socketData.Close();
- }
- if(!(iReplyCode == 226 || iReplyCode == 250))
- {
- ReadReply();
- if(!(iReplyCode == 226 || iReplyCode == 250))
- {
- throw new IOException(strReply.Substring(4));
- }
- }
- }
-
- /// <summary>
-
-
-
-
- public void Put(string strFolder,string strFileNameMask)
- {
- string[] strFiles = Directory.GetFiles(strFolder,strFileNameMask);
- foreach(string strFile in strFiles)
- {
-
- Put(strFile);
- }
- }
-
- /// <summary>
-
-
-
- public void Put(string strFileName)
- {
- if(!bConnected)
- {
- Connect();
- }
- Socket socketData = CreateDataSocket();
- SendCommand("STOR "+Path.GetFileName(strFileName));
- if( !(iReplyCode == 125 || iReplyCode == 150) )
- {
- throw new IOException(strReply.Substring(4));
- }
- FileStream input = new
- FileStream(strFileName,FileMode.Open);
- int iBytes = 0;
- while ((iBytes = input.Read(buffer,0,buffer.Length)) > 0)
- {
- socketData.Send(buffer, iBytes, 0);
- }
- input.Close();
- if (socketData.Connected)
- {
- socketData.Close();
- }
- if(!(iReplyCode == 226 || iReplyCode == 250))
- {
- ReadReply();
- if(!(iReplyCode == 226 || iReplyCode == 250))
- {
- throw new IOException(strReply.Substring(4));
- }
- }
- }
-
- #endregion
- #region 目录操作
- /// <summary>
-
-
-
- public void MkDir(string strDirName)
- {
- if(!bConnected)
- {
- Connect();
- }
- SendCommand("MKD "+strDirName);
- if(iReplyCode != 257)
- {
- throw new IOException(strReply.Substring(4));
- }
- }
-
- /// <summary>
-
-
-
- public void RmDir(string strDirName)
- {
- if(!bConnected)
- {
- Connect();
- }
- SendCommand("RMD "+strDirName);
- if(iReplyCode != 250)
- {
- throw new IOException(strReply.Substring(4));
- }
- }
-
- /// <summary>
-
-
-
- public void ChDir(string strDirName)
- {
- if(strDirName.Equals(".") || strDirName.Equals(""))
- {
- return;
- }
- if(!bConnected)
- {
- Connect();
- }
- SendCommand("CWD "+strDirName);
- if(iReplyCode != 250)
- {
- throw new IOException(strReply.Substring(4));
- }
- this.strRemotePath = strDirName;
- }
-
- #endregion
- #region 内部变量
- /// <summary>
-
-
- private string strMsg;
- /// <summary>
-
-
- private string strReply;
- /// <summary>
-
-
- private int iReplyCode;
- /// <summary>
-
-
- private Socket socketControl;
- /// <summary>
-
-
- private TransferType trType;
- /// <summary>
-
-
- private static int BLOCK_SIZE = 512;
- Byte[] buffer = new Byte[BLOCK_SIZE];
- /// <summary>
-
-
- Encoding ASCII = Encoding.ASCII;
- #endregion
- #region 内部函数
- /// <summary>
-
-
-
- private void ReadReply()
- {
- strMsg = "";
- strReply = ReadLine();
- iReplyCode = Int32.Parse(strReply.Substring(0,3));
- }
- /// <summary>
-
-
-
- private Socket CreateDataSocket()
- {
- SendCommand("PASV");
- if(iReplyCode != 227)
- {
- throw new IOException(strReply.Substring(4));
- }
- int index1 = strReply.IndexOf('(');
- int index2 = strReply.IndexOf(')');
- string ipData =
- strReply.Substring(index1+1,index2-index1-1);
- int[] parts = new int[6];
- int len = ipData.Length;
- int partCount = 0;
- string buf="";
- for (int i = 0; i < len && partCount <= 6; i++)
- {
- char ch = Char.Parse(ipData.Substring(i,1));
- if (Char.IsDigit(ch))
- buf+=ch;
- else if (ch != ',')
- {
- throw new IOException("Malformed PASV strReply: " +
- strReply);
- }
- if (ch == ',' || i+1 == len)
- {
- try
- {
- parts[partCount++] = Int32.Parse(buf);
- buf="";
- }
- catch (Exception)
- {
- throw new IOException("Malformed PASV strReply: " +
- strReply);
- }
- }
- }
- string ipAddress = parts[0] + "."+ parts[1]+ "." +
- parts[2] + "." + parts[3];
- int port = (parts[4] << 8) + parts[5];
- Socket s = new
- Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
- IPEndPoint ep = new
- IPEndPoint(IPAddress.Parse(ipAddress), port);
- try
- {
- s.Connect(ep);
- }
- catch(Exception)
- {
- throw new IOException("Can't connect to remote server");
- }
- return s;
- }
- /// <summary>
-
-
- private void CloseSocketConnect()
- {
- if(socketControl!=null)
- {
- socketControl.Close();
- socketControl = null;
- }
- bConnected = false;
- }
- /// <summary>
-
-
-
- private string ReadLine()
- {
- while(true)
- {
- int iBytes = socketControl.Receive(buffer, buffer.Length, 0);
- strMsg += ASCII.GetString(buffer, 0, iBytes);
- if(iBytes < buffer.Length)
- {
- break;
- }
- }
- char[] seperator = {'/n'};
- string[] mess = strMsg.Split(seperator);
- if(strMsg.Length > 2)
- {
- strMsg = mess[mess.Length-2];
-
-
-
-
- }
- else
- {
- strMsg = mess[0];
- }
- if(!strMsg.Substring(3,1).Equals(" "))
- {
- return ReadLine();
- }
- return strMsg;
- }
- /// <summary>
-
-
-
- private void SendCommand(String strCommand)
- {
- Byte[] cmdBytes =
- Encoding.ASCII.GetBytes((strCommand+"/r/n").ToCharArray());
- socketControl.Send(cmdBytes, cmdBytes.Length, 0);
- ReadReply();
- }
- #endregion
- }
- }
该工具类还提供一些文件操作,注释也比较丰富,再次向这个类的作者致敬。
-------------------------------------------------
这个类有一种无法处理的情况,如果FTP服务器使用SSL或者SSH2安全协议搭建的Secure FTP Server,就无法链接上了。在网上找到一个可行的办法,见文章:http://blog.csdn.net/venus0314/archive/2006/09/21/1262386.aspx
原理是利用psftp.exe工具来上传文件,上传过程和通讯协议都被隐藏了,通过流写DOS命令来文件的复制与粘贴的操作。我写过测试类,但没有成功,不过应该是一个可行的办法,正在想办法研究,如果有结果将会在博客中放出来。
psftp.exe比较难找,但还是找的到的。google吧!
-------------------------------------------------
Updated On 2008-10-21
FTPClient类中没有包含Append的功能,即将本地文件的内容追加到远程文件上的功能。这里,我放上来一个通过了测试的Append方法:
- public void Append(string strFileName)
- {
- if(!bConnected)
- Connect();
- Socket socketData = CreateDataSocket();
- SetTransferType(TransferType.Binary);
- SendCommand("APPE " + Path.GetFileName(strFileName));
- if( !(iReplyCode == 125 || iReplyCode == 150) )
- {
- throw new IOException(strReply.Substring(4));
- }
- FileStream input = new FileStream(strFileName,FileMode.Open);
- int iBytes = 0;
- while ((iBytes = input.Read(buffer,0,buffer.Length)) > 0)
- {
- socketData.Send(buffer, iBytes, 0);
- }
- input.Close();
- if (socketData.Connected)
- {
- socketData.Close();
- }
- if(!(iReplyCode == 226 || iReplyCode == 250))
- {
- ReadReply();
- if(!(iReplyCode == 226 || iReplyCode == 250))
- {
- throw new IOException(strReply.Substring(4));
- }
- }
- }
这里没有提供指定FTP远程服务器上文件名的功能,要求你上传的本地文件名与远程数据库文件名一致。事实上,我做过指定远程文件名的尝试,即将命令该为“APPE local-file remote-file”的格式,但我发现,结果是,它把本地文件的内容传上去后,生成了一个文件名为local-file与remote-file拼接后的新文件,令人费解!!