using System;
using System.Net;
using System.IO;
using System.Text;
using System.Net.Sockets;
using System.Collections.Generic;

namespace 阿飞_秋风扫落叶网站软文系统.Common
{

public class FTPHelper
{
/// <summary>
/// FTP请求对象
/// </summary>
FtpWebRequest request = null;
/// <summary>
/// FTP响应对象
/// </summary>
FtpWebResponse response = null;
/// <summary>
/// FTP服务器地址
/// </summary>
public string ftpURI { get; private set; }
/// <summary>
/// FTP服务器IP
/// </summary>
public string ftpServerIP { get; private set; }
/// <summary>
/// FTP服务器默认目录
/// </summary>
public string ftpRemotePath { get; private set; }
/// <summary>
/// FTP服务器登录用户名
/// </summary>
public string ftpUserID { get; private set; }
/// <summary>
/// FTP服务器登录密码
/// </summary>
public string ftpPassword { get; private set; }

/// <summary>
/// 初始化
/// </summary>
/// <param name="FtpServerIP">FTP连接地址</param>
/// <param name="FtpRemotePath">指定FTP连接成功后的当前目录, 如果不指定即默认为根目录</param>
/// <param name="FtpUserID">用户名</param>
/// <param name="FtpPassword">密码</param>
public FTPHelper(string ftpServerIP, string ftpRemotePath, string ftpUserID, string ftpPassword)
{
this.ftpServerIP = ftpServerIP;
this.ftpRemotePath = ftpRemotePath;
this.ftpUserID = ftpUserID;
this.ftpPassword = ftpPassword;
this.ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
}
~FTPHelper()
{
if (response != null)
{
response.Close();
response = null;
}
if (request != null)
{
request.Abort();
request = null;
}
}
/// <summary>
/// 建立FTP链接,返回响应对象
/// </summary>
/// <param name="uri">FTP地址</param>
/// <param name="ftpMethod">操作命令</param>
/// <returns></returns>
private FtpWebResponse Open(Uri uri, string ftpMethod)
{
request = (FtpWebRequest)FtpWebRequest.Create(uri);
request.Method = ftpMethod;
request.UseBinary = true;
request.KeepAlive = false;
request.Credentials = new NetworkCredential(this.ftpUserID, this.ftpPassword);
return (FtpWebResponse)request.GetResponse();
}

/// <summary>
/// 建立FTP链接,返回请求对象
/// </summary>
/// <param name="uri">FTP地址</param>
/// <param name="ftpMethod">操作命令</param>
private FtpWebRequest OpenRequest(Uri uri, string ftpMethod)
{
request = (FtpWebRequest)WebRequest.Create(uri);
request.Method = ftpMethod;
request.UseBinary = true;
request.KeepAlive = false;
request.Credentials = new NetworkCredential(this.ftpUserID, this.ftpPassword);
return request;
}
/// <summary>
/// 创建目录
/// </summary>
/// <param name="remoteDirectoryName">目录名</param>
public void CreateDirectory(string remoteDirectoryName)
{
response = Open(new Uri(ftpURI + remoteDirectoryName), WebRequestMethods.Ftp.MakeDirectory);
}
/// <summary>
/// 更改目录或文件名
/// </summary>
/// <param name="currentName">当前名称</param>
/// <param name="newName">修改后新名称</param>
public void ReName(string currentName, string newName)
{
request = OpenRequest(new Uri(ftpURI + currentName), WebRequestMethods.Ftp.Rename);
request.RenameTo = newName;
response = (FtpWebResponse)request.GetResponse();
}
/// <summary>
/// 切换当前目录
/// </summary>
/// <param name="IsRoot">true:绝对路径 false:相对路径</param>
public void GotoDirectory(string DirectoryName, bool IsRoot)
{
if (IsRoot)
ftpRemotePath = DirectoryName;
else
ftpRemotePath += "/" + DirectoryName;

ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
}
/// <summary>
/// 删除目录(包括下面所有子目录和子文件)
/// </summary>
/// <param name="remoteDirectoryName">要删除的带路径目录名：如web/test</param>
/*
* 例：删除test目录
FTPHelper helper = new FTPHelper("x.x.x.x", "web", "user", "password");
helper.RemoveDirectory("web/test");
*/
public void RemoveDirectory(string remoteDirectoryName)
{
GotoDirectory(remoteDirectoryName, true);
var listAll = ListFilesAndDirectories();
foreach (var m in listAll)
{
if (m.IsDirectory)
RemoveDirectory(m.Path);
else
DeleteFile(m.Name);
}
GotoDirectory(remoteDirectoryName, true);
response = Open(new Uri(ftpURI), WebRequestMethods.Ftp.RemoveDirectory);
}
/// <summary>
/// 文件上传
/// </summary>
/// <param name="localFilePath">本地文件路径</param>
public void Upload(string localFilePath)
{
FileInfo fileInf = new FileInfo(localFilePath);
request = OpenRequest(new Uri(ftpURI + fileInf.Name), WebRequestMethods.Ftp.UploadFile);
request.ContentLength = fileInf.Length;
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;
using (var fs = fileInf.OpenRead())
{
using (var strm = request.GetRequestStream())
{
contentLen = fs.Read(buff, 0, buffLength);
while (contentLen != 0)
{
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
}
}
}
}
/// <summary>
/// 删除文件
/// </summary>
/// <param name="remoteFileName">要删除的文件名</param>
public void DeleteFile(string remoteFileName)
{
response = Open(new Uri(ftpURI + remoteFileName), WebRequestMethods.Ftp.DeleteFile);
}

/// <summary>
/// 获取当前目录的文件和一级子目录信息
/// </summary>
/// <returns></returns>
public List<FileStruct> ListFilesAndDirectories()
{
var fileList = new List<FileStruct>();
response = Open(new Uri(ftpURI), WebRequestMethods.Ftp.ListDirectoryDetails);
using (var stream = response.GetResponseStream())
{
using (var sr = new StreamReader(stream))
{
string line = null;
while ((line = sr.ReadLine()) != null)
{
//line的格式如下：
//08-18-13 11:05PM <DIR> aspnet_client
//09-22-13 11:39PM 2946 Default.aspx
//DateTime dtDate = DateTime.ParseExact(line.Substring(0, 8), "MM-dd-yy", null);
//DateTime dtDateTime = DateTime.Parse(dtDate.ToString("yyyy-MM-dd") + line.Substring(8, 9));
string[] arrs = line.Split(' ');
var model = new FileStruct()
{
IsDirectory = line.IndexOf("<DIR>") > 0 ? true : false,
CreateTime = DateTime.Now,
Name = arrs[arrs.Length - 1],
Path = ftpRemotePath + "/" + arrs[arrs.Length - 1]
};
fileList.Add(model);
}
}
}
return fileList;
}
/// <summary>
/// 列出当前目录的所有文件
/// </summary>
public List<FileStruct> ListFiles()
{
var listAll = ListFilesAndDirectories();
Predicate<FileStruct> findValue = delegate(FileStruct p)
{
return p.IsDirectory == false;
};
var listFile = listAll.FindAll(findValue);
return listFile;
}
/// <summary>
/// 列出当前目录的所有一级子目录
/// </summary>
public List<FileStruct> ListDirectories()
{
var listAll = ListFilesAndDirectories();
Predicate<FileStruct> findValue = delegate(FileStruct p)
{
return p.IsDirectory == true;
};
var listFile = listAll.FindAll(findValue);
return listFile;
}
/// <summary>
/// 判断当前目录下指定的子目录或文件是否存在
/// </summary>
/// <param name="remoteName">指定的目录或文件名</param>
public bool IsExist(string remoteName)
{
var list = ListFilesAndDirectories();
Predicate<FileStruct> findValue = delegate(FileStruct p)
{
return p.Name == remoteName;
};
var listFile = list.FindAll(findValue);
if (listFile.Count > 0)
return true;
return false;
}
/// <summary>
/// 判断当前目录下指定的一级子目录是否存在
/// </summary>
/// <param name="RemoteDirectoryName">指定的目录名</param>
public bool IsDirectoryExist(string remoteDirectoryName)
{
var listDir = ListDirectories();
Predicate<FileStruct> findValue = delegate(FileStruct p)
{
return p.Name == remoteDirectoryName;
};
var listFile = listDir.FindAll(findValue);
if (listFile.Count > 0)
return true;
return false;
}
/// <summary>
/// 判断当前目录下指定的子文件是否存在
/// </summary>
/// <param name="RemoteFileName">远程文件名</param>
public bool IsFileExist(string remoteFileName)
{
var listFile = ListFiles();
Predicate<FileStruct> findValue = delegate(FileStruct p)
{
return p.Name == remoteFileName;
};
var lFile = listFile.FindAll(findValue);
if (lFile.Count > 0)
return true;
return false;
}

/// <summary>
/// 下载
/// </summary>
/// <param name="saveFilePath">下载后的保存路径</param>
/// <param name="downloadFileName">要下载的文件名</param>
public void Download(string saveFilePath, string downloadFileName)
{
using (FileStream outputStream = new FileStream(saveFilePath + "\\" + downloadFileName, FileMode.Create))
{
response = Open(new Uri(ftpURI + downloadFileName), WebRequestMethods.Ftp.DownloadFile);
using (Stream ftpStream = response.GetResponseStream())
{
long cl = response.ContentLength;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];
readCount = ftpStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
outputStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
}
}
}

}

public class FileStruct
{
/// <summary>
/// 是否为目录
/// </summary>
public bool IsDirectory { get; set; }
/// <summary>
/// 创建时间
/// </summary>
public DateTime CreateTime { get; set; }
/// <summary>
/// 文件或目录名称
/// </summary>
public string Name { get; set; }
/// <summary>
/// 路径
/// </summary>
public string Path { get; set; }
}
}