/// <summary>
/// 在FTP服务器上删除一个选项
/// </summary>
public void DeleteItemOnFTPServer(FTPFileSystem fileSystem)
{
//检查子目录是否存在
bool urlExist = VerifyFTPUrlExist(fileSystem.Url);
if (!urlExist)
{
return;
}
try
{
//不为空的文件夹不能删除
if (fileSystem.IsDirectory)
{
var subFTPFiles = GetSubDirectoriesAndFiles(fileSystem.Url);
DeleteItemsOnFTPServer(subFTPFiles);
}
//创建一个FtpWebRequest创建子目录
FtpWebRequest request = WebRequest.Create(fileSystem.Url) as FtpWebRequest;
request.Credentials = this.Credentials;
request.Method = fileSystem.IsDirectory
? WebRequestMethods.Ftp.RemoveDirectory : WebRequestMethods.Ftp.DeleteFile;
using (FtpWebResponse response = request.GetResponse() as FtpWebResponse)
{
this.OnNewMessageArrived(new NewMessageEventArg
{
NewMessage = response.StatusDescription
});
}
}
catch (System.Net.WebException webEx)
{
FtpWebResponse ftpResponse = webEx.Response as FtpWebResponse;
string msg = string.Format(
"There is an error while deleting {0}. "
+ " StatusCode: {1} StatusDescription: {2} ",
fileSystem.Url.ToString(),
ftpResponse.StatusCode.ToString(),
ftpResponse.StatusDescription);
ApplicationException errorException
= new ApplicationException(msg, webEx);
//有错误时执行ErrorOccurred 事件
ErrorEventArgs e = new ErrorEventArgs
{
ErrorException = errorException
};
this.OnErrorOccurred(e);
}
}
/// <summary>
/// Delete an item on FTP server.
/// </summary>
public void DeleteItemOnFTPServer(FTPFileSystem fileSystem)
{
// Check whether sub directory exist.
bool urlExist = VerifyFTPUrlExist(fileSystem.Url);
if (!urlExist)
{
return;
}
try
{
// Non-Empty folder cannot be deleted.
if (fileSystem.IsDirectory)
{
var subFTPFiles = GetSubDirectoriesAndFiles(fileSystem.Url);
DeleteItemsOnFTPServer(subFTPFiles);
}
// Create an FtpWebRequest to create the sub directory.
FtpWebRequest request = WebRequest.Create(fileSystem.Url) as FtpWebRequest;
request.Credentials = this.Credentials;
request.Method = fileSystem.IsDirectory
? WebRequestMethods.Ftp.RemoveDirectory : WebRequestMethods.Ftp.DeleteFile;
using (FtpWebResponse response = request.GetResponse() as FtpWebResponse)
{
this.OnNewMessageArrived(new NewMessageEventArg
{
NewMessage = response.StatusDescription
});
}
}
catch (System.Net.WebException webEx)
{
FtpWebResponse ftpResponse = webEx.Response as FtpWebResponse;
string msg = string.Format(
"There is an error while deleting {0}. "
+ " StatusCode: {1} StatusDescription: {2} ",
fileSystem.Url.ToString(),
ftpResponse.StatusCode.ToString(),
ftpResponse.StatusDescription);
ApplicationException errorException
= new ApplicationException(msg, webEx);
// Fire the ErrorOccurred event with the error.
ErrorEventArgs e = new ErrorEventArgs
{
ErrorException = errorException
};
this.OnErrorOccurred(e);
}
}
/// <summary>
/// 得到子目录和路径中文件，在枚举中使用所有文件夹
/// 当运行FTP LIST 协议方法得到详细的文件列表。
/// 在一个FTP服务器上，服务器响应许多信息记录，每个记录代表一个文件
/// </summary>
public IEnumerable <FTPFileSystem> GetSubDirectoriesAndFiles(Uri url)
{
FtpWebRequest request = WebRequest.Create(url) as FtpWebRequest;
request.Credentials = this.Credentials;
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
FtpWebResponse response = null;
Stream responseStream = null;
StreamReader reader = null;
try
{
response = request.GetResponse() as FtpWebResponse;
this.OnNewMessageArrived(new NewMessageEventArg
{
NewMessage = response.StatusDescription
});
responseStream = response.GetResponseStream();
reader = new StreamReader(responseStream);
List <FTPFileSystem> subDirs = new List <FTPFileSystem>();
string subDir = reader.ReadLine();
//从记录字符串中找出FTP目录列表格式
FTPDirectoryListingStyle style = FTPDirectoryListingStyle.MSDOS;
if (!string.IsNullOrEmpty(subDir))
{
style = FTPFileSystem.GetDirectoryListingStyle(subDir);
}
while (!string.IsNullOrEmpty(subDir))
{
subDirs.Add(FTPFileSystem.ParseRecordString(url, subDir, style));
subDir = reader.ReadLine();
}
return(subDirs);
}
finally
{
if (response != null)
{
response.Close();
}
//关闭StreamReader对象和相关流，释放reader系统资源
if (reader != null)
{
reader.Close();
}
}
}
/// <summary>
/// Get the sub directories and files of the Url. It will be used in enumerate
/// all the folders.
/// When run the FTP LIST protocol method to get a detailed listing of the files
/// on an FTP server, the server will response many records of information. Each
/// record represents a file.
/// </summary>
public IEnumerable <FTPFileSystem> GetSubDirectoriesAndFiles(Uri url)
{
FtpWebRequest request = WebRequest.Create(url) as FtpWebRequest;
request.Credentials = this.Credentials;
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
FtpWebResponse response = null;
Stream responseStream = null;
StreamReader reader = null;
try
{
response = request.GetResponse() as FtpWebResponse;
this.OnNewMessageArrived(new NewMessageEventArg
{
NewMessage = response.StatusDescription
});
responseStream = response.GetResponseStream();
reader = new StreamReader(responseStream);
List <FTPFileSystem> subDirs = new List <FTPFileSystem>();
string subDir = reader.ReadLine();
// Find out the FTP Directory Listing Style from the recordString.
FTPDirectoryListingStyle style = FTPDirectoryListingStyle.MSDOS;
if (!string.IsNullOrEmpty(subDir))
{
style = FTPFileSystem.GetDirectoryListingStyle(subDir);
}
while (!string.IsNullOrEmpty(subDir))
{
subDirs.Add(FTPFileSystem.ParseRecordString(url, subDir, style));
subDir = reader.ReadLine();
}
return(subDirs);
}
finally
{
if (response != null)
{
response.Close();
}
// Close the StreamReader object and the underlying stream, and release
// any system resources associated with the reader.
if (reader != null)
{
reader.Close();
}
}
}
/// <summary>
/// Get an FTPFileSystem from the recordString.
/// </summary>
public static FTPFileSystem ParseRecordString(Uri baseUrl, string recordString, FTPDirectoryListingStyle type)
{
FTPFileSystem fileSystem = null;
if (type == FTPDirectoryListingStyle.UNIX)
{
fileSystem = ParseUNIXRecordString(recordString);
}
else
{
fileSystem = ParseMSDOSRecordString(recordString);
}
// Add "/" to the url if it is a directory
fileSystem.Url = new Uri(baseUrl, fileSystem.Name + (fileSystem.IsDirectory ? "/" : string.Empty));
return(fileSystem);
}
/// <summary>
/// 记录字符串如下：
/// Directory: drwxrwxrwx 1 owner group 0 Dec 13 11:25 Folder A
/// File: -rwxrwxrwx 1 owner group 1024 Dec 13 11:25 File B
/// NOTE: The date segment does not contains year.
/// </summary>
static FTPFileSystem ParseUNIXRecordString(string recordString)
{
FTPFileSystem fileSystem = new FTPFileSystem();
fileSystem.OriginalRecordString = recordString.Trim();
fileSystem.DirectoryListingStyle = FTPDirectoryListingStyle.UNIX;
// The segments is like "drwxrwxrwx", "", "", "1", "owner", "", "", "",
// "group", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
// "0", "Dec", "13", "11:25", "Folder", "A".
string[] segments = fileSystem.OriginalRecordString.Split(' ');
int index = 0;
//许可部分如"drwxrwxrwx
string permissionsegment = segments[index];
//如果属性以“d”开始，意味是个目录
fileSystem.IsDirectory = permissionsegment[0] == 'd';
//跳过空部分
while (segments[++index] == string.Empty) { }
//跳过目录部分
//跳过空部分
while (segments[++index] == string.Empty) { }
//跳过所有者部分
//跳过空部分
while (segments[++index] == string.Empty) { }
//跳过组部分
//跳过空部分
while (segments[++index] == string.Empty) { }
//如果文件流是个文件，大小大于0
fileSystem.Size = int.Parse(segments[index]);
//跳过空部分
while (segments[++index] == string.Empty) { }
//月份部分
string monthsegment = segments[index];
//跳过空部分
while (segments[++index] == string.Empty) { }
// 天部分
string daysegment = segments[index];
//跳过空部分
while (segments[++index] == string.Empty) { }
// 时间部分.
string timesegment = segments[index];
fileSystem.ModifiedTime = DateTime.Parse(string.Format("{0} {1} {2} ",
timesegment, monthsegment, daysegment));
//跳过空部分
while (segments[++index] == string.Empty) { }
//在原始字符串中计算文件名索引
int filenameIndex = 0;
for (int i = 0; i < index; i++)
{
//在初始字符中' represents '
if (segments[i] == string.Empty)
{
filenameIndex += 1;
}
else
{
filenameIndex += segments[i].Length + 1;
}
}
//文件名可能包括许多部分因为名字包括''
fileSystem.Name = fileSystem.OriginalRecordString.Substring(filenameIndex).Trim();
return fileSystem;
}
/// <summary>
/// 12-13-10 12:41PM <DIR> Folder A
/// </summary>
/// <param name="recordString"></param>
/// <returns></returns>
static FTPFileSystem ParseMSDOSRecordString(string recordString)
{
FTPFileSystem fileSystem = new FTPFileSystem();
fileSystem.OriginalRecordString = recordString.Trim();
fileSystem.DirectoryListingStyle = FTPDirectoryListingStyle.MSDOS;
// The segments is like "12-13-10", "", "12:41PM", "", "","", "",
// "", "", "<DIR>", "", "", "", "", "", "", "", "", "", "Folder", "A".
string[] segments = fileSystem.OriginalRecordString.Split(' ');
int index = 0;
//如果四位年在IIS中没被选中，日期部分像"12-13-10"代替"12-13-2010"
string dateSegment = segments[index];
string[] dateSegments = dateSegment.Split(new char[] { '-' },
StringSplitOptions.RemoveEmptyEntries);
int month = int.Parse(dateSegments[0]);
int day = int.Parse(dateSegments[1]);
int year = int.Parse(dateSegments[2]);
//如果年大于50小于100是19**
if (year >= 50 && year < 100)
{
year += 1900;
}
//如果年小于50是20**
else if (year < 50)
{
year += 2000;
}
//跳过空部分
while (segments[++index] == string.Empty) { }
// 时间部分.
string timesegment = segments[index];
fileSystem.ModifiedTime = DateTime.Parse(string.Format("{0}-{1}-{2} {3}",
year, month, day, timesegment));
//跳过空部分
while (segments[++index] == string.Empty) { }
//大小或目录部分，如果是“<DIR>”它意味一个目录，否则是文件大小。
string sizeOrDirSegment = segments[index];
fileSystem.IsDirectory = sizeOrDirSegment.Equals("<DIR>",
StringComparison.OrdinalIgnoreCase);
//如果fileSystem 是一个文件，大小大于0
if (!fileSystem.IsDirectory)
{
fileSystem.Size = int.Parse(sizeOrDirSegment);
}
while (segments[++index] == string.Empty) { }
//计算在原始字符串中文件名部分的索引
int filenameIndex = 0;
for (int i = 0; i < index; i++)
{
// 在原始字符串中"" represents '
if (segments[i] == string.Empty)
{
filenameIndex += 1;
}
else
{
filenameIndex += segments[i].Length + 1;
}
}
//文件名包括许多部分因为名字能包含' '
fileSystem.Name = fileSystem.OriginalRecordString.Substring(filenameIndex).Trim();
return fileSystem;
}
/// <summary>
/// 在FTP服务器上删除一个选项
/// </summary>
public void DeleteItemOnFTPServer(FTPFileSystem fileSystem)
{
//检查子目录是否存在
bool urlExist = VerifyFTPUrlExist(fileSystem.Url);
if (!urlExist)
{
return;
}
try
{
//不为空的文件夹不能删除
if (fileSystem.IsDirectory)
{
var subFTPFiles = GetSubDirectoriesAndFiles(fileSystem.Url);
DeleteItemsOnFTPServer(subFTPFiles);
}
//创建一个FtpWebRequest创建子目录
FtpWebRequest request = WebRequest.Create(fileSystem.Url) as FtpWebRequest;
request.Credentials = this.Credentials;
request.Method = fileSystem.IsDirectory
? WebRequestMethods.Ftp.RemoveDirectory : WebRequestMethods.Ftp.DeleteFile;
using (FtpWebResponse response = request.GetResponse() as FtpWebResponse)
{
this.OnNewMessageArrived(new NewMessageEventArg
{
NewMessage = response.StatusDescription
});
}
}
catch (System.Net.WebException webEx)
{
FtpWebResponse ftpResponse = webEx.Response as FtpWebResponse;
string msg = string.Format(
"There is an error while deleting {0}. "
+ " StatusCode: {1} StatusDescription: {2} ",
fileSystem.Url.ToString(),
ftpResponse.StatusCode.ToString(),
ftpResponse.StatusDescription);
ApplicationException errorException
= new ApplicationException(msg, webEx);
//有错误时执行ErrorOccurred 事件
ErrorEventArgs e = new ErrorEventArgs
{
ErrorException = errorException
};
this.OnErrorOccurred(e);
}
}
/// <summary>
/// 12-13-10 12:41PM <DIR> Folder A
/// </summary>
/// <param name="recordString"></param>
/// <returns></returns>
static FTPFileSystem ParseMSDOSRecordString(string recordString)
{
FTPFileSystem fileSystem = new FTPFileSystem();
fileSystem.OriginalRecordString = recordString.Trim();
fileSystem.DirectoryListingStyle = FTPDirectoryListingStyle.MSDOS;
// The segments is like "12-13-10", "", "12:41PM", "", "","", "",
// "", "", "<DIR>", "", "", "", "", "", "", "", "", "", "Folder", "A".
string[] segments = fileSystem.OriginalRecordString.Split(' ');
int index = 0;
// The date segment is like "12-13-10" instead of "12-13-2010" if Four-digit years
// is not checked in IIS.
string dateSegment = segments[index];
string[] dateSegments = dateSegment.Split(new char[] { '-' },
StringSplitOptions.RemoveEmptyEntries);
int month = int.Parse(dateSegments[0]);
int day = int.Parse(dateSegments[1]);
int year = int.Parse(dateSegments[2]);
// If year >=50 and year <100, then it means the year 19**
if (year >= 50 && year < 100)
{
year += 1900;
}
// If year <50, then it means the year 20**
else if (year < 50)
{
year += 2000;
}
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// The time segment.
string timesegment = segments[index];
fileSystem.ModifiedTime = DateTime.Parse(string.Format("{0}-{1}-{2} {3}",
year, month, day, timesegment));
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// The size or directory segment.
// If this segment is "<DIR>", then it means a directory, else it means the
// file size.
string sizeOrDirSegment = segments[index];
fileSystem.IsDirectory = sizeOrDirSegment.Equals("<DIR>",
StringComparison.OrdinalIgnoreCase);
// If this fileSystem is a file, then the size is larger than 0.
if (!fileSystem.IsDirectory)
{
fileSystem.Size = int.Parse(sizeOrDirSegment);
}
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// Calculate the index of the file name part in the original string.
int filenameIndex = 0;
for (int i = 0; i < index; i++)
{
// "" represents ' ' in the original string.
if (segments[i] == string.Empty)
{
filenameIndex += 1;
}
else
{
filenameIndex += segments[i].Length + 1;
}
}
// The file name may include many segments because the name can contain ' '.
fileSystem.Name = fileSystem.OriginalRecordString.Substring(filenameIndex).Trim();
return(fileSystem);
}
/// <summary>
/// The recordString is like
/// Directory: drwxrwxrwx 1 owner group 0 Dec 13 11:25 Folder A
/// File: -rwxrwxrwx 1 owner group 1024 Dec 13 11:25 File B
/// NOTE: The date segment does not contains year.
/// </summary>
static FTPFileSystem ParseUNIXRecordString(string recordString)
{
FTPFileSystem fileSystem = new FTPFileSystem();
fileSystem.OriginalRecordString = recordString.Trim();
fileSystem.DirectoryListingStyle = FTPDirectoryListingStyle.UNIX;
// The segments is like "drwxrwxrwx", "", "", "1", "owner", "", "", "",
// "group", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
// "0", "Dec", "13", "11:25", "Folder", "A".
string[] segments = fileSystem.OriginalRecordString.Split(' ');
int index = 0;
// The permission segment is like "drwxrwxrwx".
string permissionsegment = segments[index];
// If the property start with 'd', then it means a directory.
fileSystem.IsDirectory = permissionsegment[0] == 'd';
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// Skip the directories segment.
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// Skip the owner segment.
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// Skip the group segment.
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// If this fileSystem is a file, then the size is larger than 0.
fileSystem.Size = int.Parse(segments[index]);
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// The month segment.
string monthsegment = segments[index];
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// The day segment.
string daysegment = segments[index];
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// The time segment.
string timesegment = segments[index];
fileSystem.ModifiedTime = DateTime.Parse(string.Format("{0} {1} {2} ",
timesegment, monthsegment, daysegment));
// Skip the empty segments.
while (segments[++index] == string.Empty)
{
}
// Calculate the index of the file name part in the original string.
int filenameIndex = 0;
for (int i = 0; i < index; i++)
{
// "" represents ' ' in the original string.
if (segments[i] == string.Empty)
{
filenameIndex += 1;
}
else
{
filenameIndex += segments[i].Length + 1;
}
}
// The file name may include many segments because the name can contain ' '.
fileSystem.Name = fileSystem.OriginalRecordString.Substring(filenameIndex).Trim();
return(fileSystem);
}
/// <summary>
/// 12-13-10 12:41PM <DIR> Folder A
/// </summary>
/// <param name="recordString"></param>
/// <returns></returns>
static FTPFileSystem ParseMSDOSRecordString(string recordString)
{
FTPFileSystem fileSystem = new FTPFileSystem();
fileSystem.OriginalRecordString = recordString.Trim();
fileSystem.DirectoryListingStyle = FTPDirectoryListingStyle.MSDOS;
// The segments is like "12-13-10", "", "12:41PM", "", "","", "",
// "", "", "<DIR>", "", "", "", "", "", "", "", "", "", "Folder", "A".
string[] segments = fileSystem.OriginalRecordString.Split(' ');
int index = 0;
//如果四位年在IIS中没被选中，日期部分像"12-13-10"代替"12-13-2010"
string dateSegment = segments[index];
string[] dateSegments = dateSegment.Split(new char[] { '-' },
StringSplitOptions.RemoveEmptyEntries);
int month = int.Parse(dateSegments[0]);
int day = int.Parse(dateSegments[1]);
int year = int.Parse(dateSegments[2]);
//如果年大于50小于100是19**
if (year >= 50 && year < 100)
{
year += 1900;
}
//如果年小于50是20**
else if (year < 50)
{
year += 2000;
}
//跳过空部分
while (segments[++index] == string.Empty)
{
}
// 时间部分.
string timesegment = segments[index];
fileSystem.ModifiedTime = DateTime.Parse(string.Format("{0}-{1}-{2} {3}",
year, month, day, timesegment));
//跳过空部分
while (segments[++index] == string.Empty)
{
}
//大小或目录部分，如果是“<DIR>”它意味一个目录，否则是文件大小。
string sizeOrDirSegment = segments[index];
fileSystem.IsDirectory = sizeOrDirSegment.Equals("<DIR>",
StringComparison.OrdinalIgnoreCase);
//如果fileSystem 是一个文件，大小大于0
if (!fileSystem.IsDirectory)
{
fileSystem.Size = int.Parse(sizeOrDirSegment);
}
while (segments[++index] == string.Empty)
{
}
//计算在原始字符串中文件名部分的索引
int filenameIndex = 0;
for (int i = 0; i < index; i++)
{
// 在原始字符串中"" represents '
if (segments[i] == string.Empty)
{
filenameIndex += 1;
}
else
{
filenameIndex += segments[i].Length + 1;
}
}
//文件名包括许多部分因为名字能包含' '
fileSystem.Name = fileSystem.OriginalRecordString.Substring(filenameIndex).Trim();
return(fileSystem);
}
/// <summary>
/// 记录字符串如下：
/// Directory: drwxrwxrwx 1 owner group 0 Dec 13 11:25 Folder A
/// File: -rwxrwxrwx 1 owner group 1024 Dec 13 11:25 File B
/// NOTE: The date segment does not contains year.
/// </summary>
static FTPFileSystem ParseUNIXRecordString(string recordString)
{
FTPFileSystem fileSystem = new FTPFileSystem();
fileSystem.OriginalRecordString = recordString.Trim();
fileSystem.DirectoryListingStyle = FTPDirectoryListingStyle.UNIX;
// The segments is like "drwxrwxrwx", "", "", "1", "owner", "", "", "",
// "group", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "",
// "0", "Dec", "13", "11:25", "Folder", "A".
string[] segments = fileSystem.OriginalRecordString.Split(' ');
int index = 0;
//许可部分如"drwxrwxrwx
string permissionsegment = segments[index];
//如果属性以“d”开始，意味是个目录
fileSystem.IsDirectory = permissionsegment[0] == 'd';
//跳过空部分
while (segments[++index] == string.Empty)
{
}
//跳过目录部分
//跳过空部分
while (segments[++index] == string.Empty)
{
}
//跳过所有者部分
//跳过空部分
while (segments[++index] == string.Empty)
{
}
//跳过组部分
//跳过空部分
while (segments[++index] == string.Empty)
{
}
//如果文件流是个文件，大小大于0
fileSystem.Size = int.Parse(segments[index]);
//跳过空部分
while (segments[++index] == string.Empty)
{
}
//月份部分
string monthsegment = segments[index];
//跳过空部分
while (segments[++index] == string.Empty)
{
}
// 天部分
string daysegment = segments[index];
//跳过空部分
while (segments[++index] == string.Empty)
{
}
// 时间部分.
string timesegment = segments[index];
fileSystem.ModifiedTime = DateTime.Parse(string.Format("{0} {1} {2} ",
timesegment, monthsegment, daysegment));
//跳过空部分
while (segments[++index] == string.Empty)
{
}
//在原始字符串中计算文件名索引
int filenameIndex = 0;
for (int i = 0; i < index; i++)
{
//在初始字符中' represents '
if (segments[i] == string.Empty)
{
filenameIndex += 1;
}
else
{
filenameIndex += segments[i].Length + 1;
}
}
//文件名可能包括许多部分因为名字包括''
fileSystem.Name = fileSystem.OriginalRecordString.Substring(filenameIndex).Trim();
return(fileSystem);
}