.NET FTP上传文件
作者：互联网
//帮助类 FTPHelper
namespace Common.FTP
{
/// <summary>
/// FTP的相关操作
/// </summary>
public class FTPHelper
{
//static readonly log4net.ILog log = log4net.LogManager.GetLogger("log4net");
private string remoteHost, remotePath, remoteUser, remotePass, mes;
private int remotePort, bytes;
private Socket clientSocket;
private int retValue;
private Boolean debug;
private Boolean logined;
private string reply;
private static int BLOCK_SIZE = 512;
private Byte[] buffer = new Byte[BLOCK_SIZE];
private Encoding ASCII = Encoding.ASCII;
private Encoding Default = Encoding.Default;
public FTPHelper()
{
remoteHost = "";
remotePath = ".";
remoteUser = "anonymous";
remotePass = "";
remotePort = 21;
debug = false;
logined = false;
}
public FTPHelper(string sRemoteHost,string sRemotePath,string sRemoteUser,string sRemotePassword,int iRemotePort)
{
remoteHost = sRemoteHost;
remotePath = sRemotePath;
remoteUser = sRemoteUser;
remotePass = sRemotePassword;
remotePort = iRemotePort;
debug = false;
logined = false;
}
///
/// Set the name of the FTP server to connect to.
///
/// Server name
public void setRemoteHost(string remoteHost)
{
this.remoteHost = remoteHost;
}
///
/// Return the name of the current FTP server.
///
/// Server name
public string getRemoteHost()
{
return remoteHost;
}
///
/// Set the port number to use for FTP.
///
/// Port number
public void setRemotePort(int remotePort)
{
this.remotePort = remotePort;
}
///
/// Return the current port number.
///
/// Current port number
public int getRemotePort()
{
return remotePort;
}
///
/// Set the remote directory path.
///
/// The remote directory path
public void setRemotePath(string remotePath)
{
this.remotePath = remotePath;
}
///
/// Return the current remote directory path.
///
/// The current remote directory path.
public string getRemotePath()
{
return remotePath;
}
///
/// Set the user name to use for logging into the remote server.
///
/// Username
public void setRemoteUser(string remoteUser)
{
this.remoteUser = remoteUser;
}
///
/// Set the password to user for logging into the remote server.
///
/// Password
public void setRemotePass(string remotePass)
{
this.remotePass = remotePass;
}
///
/// 从文件系统中返回一个文件列表。在string()函数中返回文件。.
///
///
///
public string[] getFileList(string mask)
{
if (!logined)
{
login();
}
Socket cSocket = createDataSocket();
sendCommand("NLST " + mask);
if (!(retValue == 150 || retValue == 125))
{
throw new IOException(reply.Substring(4));
}
mes = "";
Thread.Sleep(700);
while (true)
{
if (cSocket.Connected)
{
int bytes = cSocket.Receive(buffer, buffer.Length, 0);
mes += Default.GetString(buffer, 0, bytes);
if (bytes < buffer.Length)
{
break;
}
}
else
{
//log.Info("socket 连接断了！");
}
}
//log.Info(mes);
char[] seperator = {'\n'};
string[] mess = mes.Split(seperator);
//foreach(string fileName in mess)
//{
//log.Info(fileName);
//}
cSocket.Close();
readReply();
if (retValue != 226)
{
throw new IOException(reply.Substring(4));
}
return mess;
}
public string[] getFileList()
{
if (!logined)
{
login();
}
Socket cSocket = createDataSocket();
sendCommand("LIST ");
if (!(retValue == 150 || retValue == 125))
{
throw new IOException(reply.Substring(4));
}
mes = "";
while (true)
{
int bytes = cSocket.Receive(buffer, buffer.Length, 0);
mes += Default.GetString(buffer, 0, bytes);
if (bytes < buffer.Length)
{
break;
}
}
//log.Info(mes);
char[] seperator = {'\n'};
string[] mess = mes.Split(seperator);
cSocket.Close();
readReply();
if (retValue != 226)
{
throw new IOException(reply.Substring(4));
}
return mess;
}
///
/// 得到FTP服务器上的文件大小.
///
///
///
public long getFileSize(string fileName)
{
if (!logined)
{
login();
}
sendCommand("SIZE " + fileName);
long size = 0;
if (retValue == 213)
{
size = Int64.Parse(reply.Substring(4));
}
else
{
throw new IOException(reply.Substring(4));
}
return size;
}
///
/// 登录FTP服务器
///
public void login()
{
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ep = new IPEndPoint(Dns.Resolve(remoteHost).AddressList[0], remotePort);
try
{
clientSocket.Connect(ep);
}
catch (Exception)
{
throw new IOException("Couldn't connect to remote server");
}
readReply();
if (retValue != 220)
{
close();
throw new IOException(reply.Substring(4));
}
if (debug)
Console.WriteLine("USER " + remoteUser);
sendCommand("USER " + remoteUser);
if (!(retValue == 331 || retValue == 230))
{
cleanup();
throw new IOException(reply.Substring(4));
}
if (retValue != 230)
{
if (debug)
Console.WriteLine("PASS xxx");
sendCommand("PASS " + remotePass);
if (!(retValue == 230 || retValue == 202))
{
cleanup();
throw new IOException(reply.Substring(4));
}
}
logined = true;
Console.WriteLine("Connected to " + remoteHost);
chdir(remotePath);
}
///
/// 如果模式值为真，对下载设置为二进制模式。否则，设置为Default模式
/// Else, set Ascii mode.
///
///
public void setBinaryMode(Boolean mode)
{
if (mode)
{
sendCommand("TYPE I");
}
else
{
sendCommand("TYPE A");
}
if (retValue != 200)
{
throw new IOException(reply.Substring(4));
}
}
///
/// Download a file to the Assembly's local directory,
/// keeping the same file name.
///
/// 向配置好的本地目录下载一个文件。保持文件名一样。
public void download(string remFileName)
{
download(remFileName, "", false);
}
///
/// Download a remote file to the Assembly's local directory,
/// keeping the same file name, and set the resume flag.
///
///
/// 向一个配置好的本地文件夹下载一个远程文件。保持文件名一样。
public void download(string remFileName, Boolean resume)
{
download(remFileName, "", resume);
}
///
/// Download a remote file to a local file name which can include
/// a path. The local file name will be created or overwritten,
/// but the path must exist.
///
/// 对本地文件名下载一个远程文件。你必须包含一个路径。
/// 本地文件名将会创建或者将会被重写，但是路径必须存在。
public void download(string remFileName, string locFileName)
{
download(remFileName, locFileName, false);
}
///
/// Download a remote file to a local file name which can include
/// a path, and set the resume flag. The local file name will be
/// created or overwritten, but the path must exist.
///
/// 对一个本地文件名下载一个远程文件。你必须包含一个路径。
/// 设置恢复标志。本地文件名将会被创建或被重写，但是本地路径必须存在。
///
public void download(string remFileName, string locFileName, Boolean resume)
{
if (!logined)
{
login();
}
setBinaryMode(false);
Console.WriteLine("Downloading file " + remFileName + " from " + remoteHost + "//" + remotePath);
if (locFileName.Equals(""))
{
locFileName = remFileName;
}
if (!System.IO.File.Exists(locFileName))
{
Stream st = System.IO.File.Create(locFileName);
st.Close();
}
FileStream output = new FileStream(locFileName, FileMode.Create);
Socket cSocket = createDataSocket();
long offset = 0;
if (resume)
{
offset = output.Length;
if (offset > 0)
{
setBinaryMode(false);
sendCommand("REST " + offset);
if (retValue != 350)
{
//throw new IOException(reply.Substring(4));
//Some servers may not support resuming.
offset = 0;
}
}
if (offset > 0)
{
if (debug)
{
Console.WriteLine("seeking to " + offset);
}
long npos = output.Seek(offset, SeekOrigin.Begin);
Console.WriteLine("new pos=" + npos);
}
}
sendCommand("RETR " + remFileName);
if (!(retValue == 150 || retValue == 125))
{
throw new IOException(reply.Substring(4));
}
while (true)
{
bytes = cSocket.Receive(buffer, buffer.Length, 0);
output.Write(buffer, 0, bytes);
if (bytes <= 0)
{
break;
}
}
output.Close();
if (cSocket.Connected)
{
cSocket.Close();
}
Console.WriteLine("");
readReply();
if (!(retValue == 226 || retValue == 250))
{
throw new IOException(reply.Substring(4));
}
}
///
/// Upload a System.IO.File.
///
/// 这是一个从你的本地硬盘上向你的FTP文件夹中上载文件的函数
public void upload(string fileName)
{
upload(fileName, false);
}
///
/// Upload a file and set the resume flag.
///
///
/// 这是一个从你的本地硬盘上向你的FTP网页上上载的函数和设置恢复标志
public void upload(string fileName, Boolean resume)
{
if (!logined)
{
login();
}
Socket cSocket = createDataSocket();
long offset = 0;
if (resume)
{
try
{
setBinaryMode(true);
offset = getFileSize(fileName);
}
catch (Exception)
{
offset = 0;
}
}
if (offset > 0)
{
sendCommand("REST " + offset);
if (retValue != 350)
{
//throw new IOException(reply.Substring(4));
//Remote server may not support resuming.
offset = 0;
}
}
/*==========================*/
sendCommand("STOR " + Path.GetFileName(fileName));
if (!(retValue == 125 || retValue == 150))
{
throw new IOException(reply.Substring(4));
}
// open input stream to read source file
FileStream input = new FileStream(fileName, FileMode.Open);
if (offset != 0)
{
if (debug)
{
Console.WriteLine("seeking to " + offset);
}
input.Seek(offset, SeekOrigin.Begin);
}
Console.WriteLine("Uploading file " + fileName + " to " + remotePath);
while ((bytes = input.Read(buffer, 0, buffer.Length)) > 0)
{
cSocket.Send(buffer, bytes, 0);
}
input.Close();
Console.WriteLine("");
if (cSocket.Connected)
{
cSocket.Close();
}
readReply();
if (!(retValue == 226 || retValue == 250))
{
throw new IOException(reply.Substring(4));
}
}
///
/// Delete a file from the remote FTP server.
///
/// 从远程FTP服务器上删除一个文件。
public void deleteRemoteFile(string fileName)
{
if (!logined)
{
login();
}
sendCommand("DELE " + fileName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
///
/// Rename a file on the remote FTP server.
///
///
/// 在远程FTP服务器上重命名一个文件
public void renameRemoteFile(string oldFileName, string newFileName)
{
if (!logined)
{
login();
}
sendCommand("RNFR " + oldFileName);
if (retValue != 350)
{
throw new IOException(reply.Substring(4));
}
// known problem
// rnto will not take care of existing System.IO.File.
// i.e. It will overwrite if newFileName exist
sendCommand("RNTO " + newFileName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
///
/// Create a directory on the remote FTP server.
///
/// 这是一个在远程服务器上创建目录的函数
public void mkdir(string dirName)
{
if (!logined)
{
login();
}
sendCommand("MKD " + dirName);
if (retValue == 250 || retValue == 257)
{
}
else
{
throw new IOException(reply.Substring(4));
}
}
///
/// Delete a directory on the remote FTP server.
///
/// 这是一个在远程FTP服务器上删除目录的函数
public void rmdir(string dirName)
{
if (!logined)
{
login();
}
sendCommand("RMD " + dirName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
}
///
/// Change the current working directory on the remote FTP server.
///
/// 这是一个用来在远程FTP服务器上改变当前工作目录的函数。
public void chdir(string dirName)
{
if (dirName.Equals("."))
{
return;
}
if (!logined)
{
login();
}
sendCommand("CWD " + dirName);
if (retValue != 250)
{
throw new IOException(reply.Substring(4));
}
this.remotePath = dirName;
Console.WriteLine("Current directory is " + remotePath);
}
///
/// Close the FTP connection.
/// 关闭远程服务器的FTP链接
public void close()
{
if (clientSocket != null)
{
sendCommand("QUIT");
}
cleanup();
Console.WriteLine("Closing...");
}
///
/// Set debug mode.
///
///
public void setDebug(Boolean debug)
{
this.debug = debug;
}
private void readReply()
{
mes = "";
reply = readLine();
retValue = Int32.Parse(reply.Substring(0, 3));
}
private void cleanup()
{
if (clientSocket != null)
{
clientSocket.Close();
clientSocket = null;
}
logined = false;
}
private string readLine()
{
while (true)
{
bytes = clientSocket.Receive(buffer, buffer.Length, 0);
mes += Default.GetString(buffer, 0, bytes);
if (bytes < buffer.Length)
{
break;
}
}
char[] seperator = {'\n'};
string[] mess = mes.Split(seperator);
if (mes.Length > 2)
{
mes = mess[mess.Length - 2];
}
else
{
mes = mess[0];
}
if (!mes.Substring(3, 1).Equals(" "))
{
return readLine();
}
if (debug)
{
for (int k = 0; k < mess.Length - 1; k++)
{
Console.WriteLine(mess[k]);
}
}
return mes;
}
private void sendCommand(String command)
{
Byte[] cmdBytes = Encoding.Default.GetBytes((command + "\r\n").ToCharArray());
clientSocket.Send(cmdBytes, cmdBytes.Length, 0);
readReply();
}
//创建一个数据包
private Socket createDataSocket()
{
sendCommand("PASV");
if (retValue != 227)
{
throw new IOException(reply.Substring(4));
}
int index1 = reply.IndexOf('(');
int index2 = reply.IndexOf(')');
string ipData = reply.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 reply: " + reply);
}
if (ch == ',' || i + 1 == len)
{
try
{
parts[partCount++] = Int32.Parse(buf);
buf = "";
}
catch (Exception)
{
throw new IOException("Malformed PASV reply: " + reply);
}
}
}
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);
s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 5000);
IPEndPoint ep = new IPEndPoint(Dns.Resolve(ipAddress).AddressList[0], port);
try
{
s.Connect(ep);
}
catch (Exception)
{
throw new IOException("Can't connect to remote server");
}
return s;
}
}
//调用
public bool SaveFileToFTP(string ftppath, string filename)
{
bool result = System.IO.File.Exists(filename);
if (result)
{
try
{
FTPHelper ftpHelper = new FTPHelper(FTPIP, "", FTPUserName, FTPPassword, SysConvert.ToInt32(FTPPort));
foreach (string dir in ftppath.Split('/').ToArray())
{
if (string.IsNullOrEmpty(dir))
{
continue;
}
bool isContinue = false;
string[] ftpfileslist = ftpHelper.getFileList();
for (int i = 0; i < ftpfileslist.Length; i++)
{
string tempStr = ftpfileslist[i].Trim().Replace("\\r", "");
if (string.IsNullOrEmpty(tempStr))
{
continue;
}
string[] ftpDirInfo = tempStr.Split(' ');
//log.Info(tempStr);
if (tempStr.ToLower().Contains("<dir>") || ftpDirInfo[0].Contains("dr"))
{
if (ftpDirInfo[ftpDirInfo.Length - 1] == dir)
{
ftpHelper.chdir(dir);
isContinue = true;
break;
}
continue;
}
}
if (!isContinue)
{
try
{
ftpHelper.mkdir(dir);
}
catch
{
}
ftpHelper.chdir(dir);
}
}
ftpHelper.upload(filename);
}
catch (Exception ex)
{
result = false;
}
}
return result;
}
标签：FTP,string,上传,Substring,reply,new,NET,retValue,public 来源： https://www.cnblogs.com/ZeroSunny/p/11302184.html