DotNet中FTP操作

╰+哭是因爲堅強的太久メ 2022-08-09 09:57 265阅读 0赞

class FtpHandler
        {
            private string host = null;
            private string user = null;
            private string pass = null;
            private FtpWebRequest ftpRequest = null;
            private FtpWebResponse ftpResponse = null;
            private Stream ftpStream = null;
            private int bufferSize = 2048;
    
            /* Construct Object */
            public FtpHandler(string hostIP, string userName, string password)
            {
                host = hostIP; user = userName; pass = password;
            }
    
            /* Download File */
            public void Download(string remoteFile, string localFile)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + remoteFile);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
                    /* Establish Return Communication with the FTP Server */
                    ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                    /* Get the FTP Server's Response Stream */
                    ftpStream = ftpResponse.GetResponseStream();
                    /* Open a File Stream to Write the Downloaded File */
                    FileStream localFileStream = new FileStream(localFile, FileMode.Create);
                    /* Buffer for the Downloaded Data */
                    byte[] byteBuffer = new byte[bufferSize];
                    int bytesRead = ftpStream.Read(byteBuffer, 0, bufferSize);
                    /* Download the File by Writing the Buffered Data Until the Transfer is Complete */
                    try
                    {
                        while (bytesRead > 0)
                        {
                            localFileStream.Write(byteBuffer, 0, bytesRead);
                            bytesRead = ftpStream.Read(byteBuffer, 0, bufferSize);
                        }
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.ToString());
                    }
                    /* Resource Cleanup */
                    localFileStream.Close();
                    ftpStream.Close();
                    ftpResponse.Close();
                    ftpRequest = null;
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                    throw (ex);
                }
                return;
            }
    
            /* Upload File */
            public void Upload(string remoteFile, string localFile)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + remoteFile);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
                    /* Establish Return Communication with the FTP Server */
                    ftpStream = ftpRequest.GetRequestStream();
                    /* Open a File Stream to Read the File for Upload */
                    FileStream localFileStream = new FileStream(localFile, FileMode.Open);
                    /* Buffer for the Downloaded Data */
                    byte[] byteBuffer = new byte[bufferSize];
                    int bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize);
                    /* Upload the File by Sending the Buffered Data Until the Transfer is Complete */
                    try
                    {
                        while (bytesSent != 0)
                        {
                            ftpStream.Write(byteBuffer, 0, bytesSent);
                            bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize);
                        }
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.ToString());
                    }
                    /* Resource Cleanup */
                    localFileStream.Close();
                    ftpStream.Close();
                    ftpRequest = null;
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                }
                return;
            }
    
            /* Delete File */
            public void Delete(string deleteFile)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + deleteFile);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.DeleteFile;
                    /* Establish Return Communication with the FTP Server */
                    ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                    /* Resource Cleanup */
                    ftpResponse.Close();
                    ftpRequest = null;
                }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                return;
            }
    
            /* Rename File */
            public void Rename(string currentFileNameAndPath, string newFileName)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + currentFileNameAndPath);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.Rename;
                    /* Rename the File */
                    ftpRequest.RenameTo = newFileName;
                    /* Establish Return Communication with the FTP Server */
                    ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                    /* Resource Cleanup */
                    ftpResponse.Close();
                    ftpRequest = null;
                }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                return;
            }
    
            /* Create a New Directory on the FTP Server */
            public void CreateDirectory(string newDirectory)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + newDirectory);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.MakeDirectory;
                    /* Establish Return Communication with the FTP Server */
                    ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                    /* Resource Cleanup */
                    ftpResponse.Close();
                    ftpRequest = null;
                }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                return;
            }
    
            /* Get the Date/Time a File was Created */
            public string GetFileCreatedDateTime(string fileName)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + fileName);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.GetDateTimestamp;
                    /* Establish Return Communication with the FTP Server */
                    ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                    /* Establish Return Communication with the FTP Server */
                    ftpStream = ftpResponse.GetResponseStream();
                    /* Get the FTP Server's Response Stream */
                    StreamReader ftpReader = new StreamReader(ftpStream);
                    /* Store the Raw Response */
                    string fileInfo = null;
                    /* Read the Full Response Stream */
                    try { fileInfo = ftpReader.ReadToEnd(); }
                    catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                    /* Resource Cleanup */
                    ftpReader.Close();
                    ftpStream.Close();
                    ftpResponse.Close();
                    ftpRequest = null;
                    /* Return File Created Date Time */
                    return fileInfo;
                }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Return an Empty string Array if an Exception Occurs */
                return "";
            }
    
            /* Get the Size of a File */
            public string GetFileSize(string fileName)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + fileName);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.GetFileSize;
                    /* Establish Return Communication with the FTP Server */
                    ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                    /* Establish Return Communication with the FTP Server */
                    ftpStream = ftpResponse.GetResponseStream();
                    /* Get the FTP Server's Response Stream */
                    StreamReader ftpReader = new StreamReader(ftpStream);
                    /* Store the Raw Response */
                    string fileInfo = null;
                    /* Read the Full Response Stream */
                    try { while (ftpReader.Peek() != -1) { fileInfo = ftpReader.ReadToEnd(); } }
                    catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                    /* Resource Cleanup */
                    ftpReader.Close();
                    ftpStream.Close();
                    ftpResponse.Close();
                    ftpRequest = null;
                    /* Return File Size */
                    return fileInfo;
                }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Return an Empty string Array if an Exception Occurs */
                return "";
            }
    
            /* List Directory Contents File/Folder Name Only */
            public string[] DirectoryListSimple(string directory)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + directory);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory;
                    /* Establish Return Communication with the FTP Server */
                    ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                    /* Establish Return Communication with the FTP Server */
                    ftpStream = ftpResponse.GetResponseStream();
                    /* Get the FTP Server's Response Stream */
                    StreamReader ftpReader = new StreamReader(ftpStream);
                    /* Store the Raw Response */
                    string directoryRaw = null;
                    /* Read Each Line of the Response and Append a Pipe to Each Line for Easy Parsing */
                    try { while (ftpReader.Peek() != -1) { directoryRaw += ftpReader.ReadLine() + "|"; } }
                    catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                    /* Resource Cleanup */
                    ftpReader.Close();
                    ftpStream.Close();
                    ftpResponse.Close();
                    ftpRequest = null;
                    /* Return the Directory Listing as a string Array by Parsing 'directoryRaw' with the Delimiter you Append (I use | in This Example) */
                    try { string[] directoryList = directoryRaw.Split("|".ToCharArray()); return directoryList; }
                    catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Return an Empty string Array if an Exception Occurs */
                return new string[] { "" };
            }
    
            /* List Directory Contents in Detail (Name, Size, Created, etc.) */
            public string[] DirectoryListDetailed(string directory)
            {
                try
                {
                    /* Create an FTP Request */
                    ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + directory);
                    /* Log in to the FTP Server with the User Name and Password Provided */
                    ftpRequest.Credentials = new NetworkCredential(user, pass);
                    /* When in doubt, use these options */
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = true;
                    /* Specify the Type of FTP Request */
                    ftpRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                    /* Establish Return Communication with the FTP Server */
                    ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                    /* Establish Return Communication with the FTP Server */
                    ftpStream = ftpResponse.GetResponseStream();
                    /* Get the FTP Server's Response Stream */
                    StreamReader ftpReader = new StreamReader(ftpStream);
                    /* Store the Raw Response */
                    string directoryRaw = null;
                    /* Read Each Line of the Response and Append a Pipe to Each Line for Easy Parsing */
                    try { while (ftpReader.Peek() != -1) { directoryRaw += ftpReader.ReadLine() + "|"; } }
                    catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                    /* Resource Cleanup */
                    ftpReader.Close();
                    ftpStream.Close();
                    ftpResponse.Close();
                    ftpRequest = null;
                    /* Return the Directory Listing as a string Array by Parsing 'directoryRaw' with the Delimiter you Append (I use | in This Example) */
                    try { string[] directoryList = directoryRaw.Split("|".ToCharArray()); return directoryList; }
                    catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Return an Empty string Array if an Exception Occurs */
                return new string[] { "" };
            }
        }