SFTP or FTP over SSH / port 22 is less desirable. Implicit / non-negotiated FTPS using a standard port of 990. There are a few standards - FTP eS ( FTP over explicit SSL or TSL ) is preferred and generally uses the standard port 21. I use port 21 with most servers, but the server determines the allowable port usage. Re: Are you having issues uploading and downloading files? OutDelegate( " Error downloading file: " + ex.Message) Read the file from the server and write it to the local file while ((len = dataStream.Read(downBuffer, 0, downBuffer.Length)) > 0) OutDelegate( " Downloading file " + remFileName + " from " + remoteHost) Secure the stream this.getSslStream(cSocket) OutDelegate( " Error: Bad response from server during download: " + reply) Send the retrieve command to the server Create or open the local file for writingįileStream output = new FileStream(locFileName, FileMode.OpenOrCreate, FileAccess.Write) If the local file isn't set, default it to be the same name as the server's file name if (locFileName = null || locFileName.Equals( " "))
If we aren't logged in, do so now if (!loggedIn) / /// Filename of the file on the server /// Filename (with path) of the local file /// True if successful, False otherwise public bool Download( string remFileName, string locFileName = null) Int bytes = input.Read(bufferFile, 0, bufferFile.Length) // Fill the buffer with the fileĭataStream.Write(bufferFile, 0, bufferFile.Length) // Write the buffer to the server using the secure stream // If we read less bytes than the file had left, we reached the end of the file if (bytes /// Downloads a file from the server OutDelegate( " Uploading file " + fileName + " to " + remoteDir) Id the data socket is connected if (cSocket.Connected)įileStream input = File.OpenRead(fileName) If we were able to secure the stream if (getSslStream(cSocket)) OutDelegate( " Error: Bad response from server during upload: " + reply) SendCommand( " STOR " + Path.GetFileName(fileName)) OutDelegate( " Data Socket Connected: " + ()) Create the data socket and attempt to connect
If we aren't logged in already if (!loggedIn) / /// The file name (including path) of the local file to upload /// True if successful, False otherwise public bool Upload( string fileName)
Ftp client download method .net code#
The effect on the user is that once in a while, only the first portion of the file will be downloaded.Ĭopy Code /// /// Upload a file to the server
Ftp client download method .net full#
I have seen very rare instances where Socket.Receive returned a buffer that was less than full and it was not the end of the file. The Socket will return *up to* BLOCK_SIZE, but it doesn't have to fill the entire buffer. The code should test for 0 bytes returned, instead of a less than full buffer. One of the things I noticed about the code in FTP_DLL.FTPFactory is that the calls to Socket.Receive use the return value incorrectly to test for "End Of File". I wound up using FtpWebRequest class which worked easily, but obviously I had to accept the "stateless" model that it offers. Since I didn't have the time or desire to learn the nuts and bolts of FTP, I had to try something else.
After some tweaking, I managed to get it to log in, but I could not get a directory listing. Unfortunately, I could not get the library to work in FTPS explicit mode with a Microsoft FTP server. An FTP client library is definitely not an easy task. I applaud the author Kadaoui El Mehdi for taking the initiative to learn FTP protocol and implement a client. Message=The requested name is valid, but no data of the requested type was foundĪt (String hostName, Boolean includeIPv6)Īt (String hostName)Īt FTP_() in c:cp\FTPSecure\FTPTest\FTP.cs:line 259Īt (String args) in D:\SampleWork\ConsoleApplication2\ConsoleApplication2\Program.cs:line 21Īt System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String args)Īt (String assemblyFile, Evidence assemblySecurity, String args)Īt .RunUsersAssembly()Īt _Context(Object state)Īt (ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)Īt (ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)Īt (ExecutionContext executionContext, ContextCallback callback, Object state)Īt ()