Ftpwebrequest Protocol Error
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System.net.webexception: The Remote Server Returned An Error: (550) File Unavailable
about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x 550 file not found ftp Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up 550 file the remote server returned an error: (530) not logged in. unavailable error with FtpWebRequest class file upload. Works fine in FileZilla up vote 5 down vote favorite 1 I'm searched and found other questions on this but none have solved my issues. I'm trying to upload a file via FTP using sample MSDN code. I get the The remote server returned an error: (550) File unavailable (e.g., file not found, no access) error on this
Ftpwebrequest Download File
line: ftpstream.Close(); string inputfilepath = @"C:\DWF\test.txt"; string ftpfilepath = "/abc/def/hij/klm/nop/test.txt"; string ftphost = "my-ser-ver1:2121"; //here correct hostname or IP of the ftp server to be given string ftpfullpath = "ftp://" + ftphost + ftpfilepath; FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(ftpfullpath); ftp.Credentials = new NetworkCredential("user", "pass"); //userid and password for the ftp server to given ftp.KeepAlive = true; ftp.UseBinary = true; ftp.Method = WebRequestMethods.Ftp.UploadFile; FileStream fs = File.OpenRead(inputfilepath); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); fs.Close(); Stream ftpstream = ftp.GetRequestStream(); ftpstream.Write(buffer, 0, buffer.Length); ftpstream.Close(); I have double checked the URI for blank spaces and there are none. I am able to complete this task using filezilla with the same user login. There is no oddball default directory that is already part of my URI. One thing for sure is that I am connecting to a unix server so maybe there is a setting I am missing? Edit #1 (Added error log from System.Net) System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [220 Oracle Content Services FTP Server ready.] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Sending command [USER myuser] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [331 Password required for
SQL Server 2014 Express resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation the underlying connection was closed: the server committed a protocol violation. APIs and reference Dev centers Retired content Samples We’re sorry. The content ftpwebrequest sftp you requested has been removed. You’ll be auto redirected in 1 second. Ask a question Quick access Forums
550 The System Cannot Find The Path Specified.
home Browse forums users FAQ Search related threads Remove From My Forums Asked by: Using FtpWebRequest in .NET 2.0 via C# - Occasionally get "Server committed protocol error" Archived Forums http://stackoverflow.com/questions/9621755/550-file-unavailable-error-with-ftpwebrequest-class-file-upload-works-fine-in-f # > .NET Framework Networking and Communication Question 0 Sign in to vote On doing an FTP file upload from the XP Embedded PC in our product to another internal embedded processor (which is connected via ethernet and is part of the product) we occasionally get an exception System.Net.WebException: The underlying connection was closed: The server committed a protocol violation ... https://social.msdn.microsoft.com/Forums/en-US/83aaf315-ea1f-41b5-9b39-32601aa882de/using-ftpwebrequest-in-net-20-via-c-occasionally-get-server-committed-protocol-error?forum=netfxnetcom at System.Net.FtpWebRequest.SyncRequestCallback(... The behavior I see on the wire when this happens is after we do a USER request we get "Response: 230 User \b\206B\240 logged in". This happens the first 2 times with 2 different (but consistent) "garbage" strings as user names. The third time and on succeeds and returns a space " " as the user name (we login as "(none)") . Monday, January 29, 2007 4:35 PM All replies 0 Sign in to vote Sounds to me like you need to contact the embedded processor's firmware vendor for support. Monday, January 29, 2007 5:09 PM Moderator Microsoft is conducting an online survey to understand your opinion of the Msdn Web site. If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site.Would you like to participate? Privacy statement Help us improve MSDN. Visit our UserVoice Page to submit and vote on ideas! Make a suggestion Dev centers Windows Office Visual Studio Microsoft Azure More... Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blog
resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards https://msdn.microsoft.com/en-us/library/system.net.ftpwebrequest.enablessl(v=vs.110).aspx Events Community Magazine Forums Blogs Channel 9 Documentation APIs and https://blogs.msdn.microsoft.com/adarshk/2005/04/22/using-ftpwebrequest-to-do-ftp-over-ssl/ reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. System.Net FtpWebRequest Class FtpWebRequest Properties FtpWebRequest Properties EnableSsl Property EnableSsl Property EnableSsl Property ClientCertificates Property ConnectionGroupName Property ContentLength Property the remote ContentOffset Property ContentType Property Credentials Property DefaultCachePolicy Property EnableSsl Property Headers Property KeepAlive Property Method Property PreAuthenticate Property Proxy Property ReadWriteTimeout Property RenameTo Property RequestUri Property ServicePoint Property Timeout Property UseBinary Property UseDefaultCredentials Property UsePassive Property TOC Collapse the table of content Expand the table of content This documentation is archived and the remote server is not being maintained. This documentation is archived and is not being maintained. FtpWebRequest.EnableSsl Property .NET Framework (current version) Other Versions Visual Studio 2010 .NET Framework 4 Visual Studio 2008 .NET Framework 3.5 .NET Framework 3.0 .NET Framework 2.0 Gets or sets a Boolean that specifies that an SSL connection should be used.Namespace: System.NetAssembly: System (in System.dll)Syntax C#C++F#VB Copy public bool EnableSsl { get; set; } Property Value Type: System.Booleantrue if control and data transmissions are encrypted; otherwise, false. The default value is false.Exceptions Exception Condition InvalidOperationExceptionThe connection to the FTP server has already been established.RemarksCaution Unless the EnableSsl property is true, all data and commands, including your user name and password information, are sent to the server in clear text. Anyone monitoring network traffic can view your credentials and use them to connect to the server. If you are connecting to an FTP server that requires credentials and supports SS
22, 200531 0 0 0 Last few weeks we were busy to get Whidbey Beta-2 bits ready for release. If you are looking for some API where yourapplication could talk to a FTP server, which supports SSL. FtpWebRequest under System.Net namespace is your solution. Here I will just point to SSL specific features of the class Enabling FtpWebrequest to use Ssl is pretty simple, you just need to set EnableSsl flag before calling GetResponse() or GetRequestStream() on the FtpWebRequest object. FtpWebRequest request = WebRequest.Create(ftp://myftpserver/dir/filename);request.Method = WebRequestMethods.Ftp.DownloadFile;request.EnableSsl = true; // Here you enabled request to use ssl instead of clear textWebResponse response = request.GetResponse(); Some people asked me why FtpWebRequest support "ftps:" protocolbased uri similar to "https:", the reason is there is no standard "ftps" scheme specified (yet) and ftp-over-ssl mechanismactually does not demand dedicated port for ssl, you coulddo iton the same server port on which you are doing regular clear text ftp.It depends on server configuration choice to force the SSL or allow both. Once you start doing Ftp over SSL there are two important things you will need to know Validating Server Certificate If you were old WebRequest user, you might already know about using ServicePointManager.CertificatePolicy for https server certificate validation. In whidbey you will notice the compiler warning saying ServicePointManager.CertificatePolicy is obsolete and replaced with ServicePointManager.ServerCertificateValidationCallback which is delegate of type RemoteCertificateValidationDelegate. New delegate provide better programming model with all certificate errors reported in a single callback and you will also get instance of X509Chain object, which allow you to make decision on certificate chain. ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(myCertificateValidation); Actual method will look as belowpublic bool myCertificateValidation(Object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors Errors){ return(certificate.GetName() == "my_trusted_name");}; //Just an example, not real world scenaio 🙂 Anotheradditional advantage you can take with delegate is from anonymous method support of C# 2.0, especially if you have very simple 1-2 line certificateplicy to implement, see follwing example. S