FtpWebRequest类文件上传时出现550文件不可用错误。 在FileZilla中正常工作
我搜索并发现了其他问题，但没有解决我的问题。 我正在尝试使用示例MSDN代码通过FTP上传文件。 我得到远程服务器返回错误：（550）文件不可用（例如，找不到文件，没有访问）错误在这一行：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(); 我已经仔细检查了URI的空格，但没有。 我可以使用具有相同用户登录名的filezilla完成此任务。 没有古怪的默认目录已经是我的URI的一部分。 有一点可以肯定的是，我正在连接到unix服务器，所以可能有一个我缺少的设置？
编辑＃1（从System.Net添加错误日志）
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 myuser.] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Sending command [PASS ********] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [230 Login successful.] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Sending command [OPTS utf8 on] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [500 Command not supported: OPTS] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Sending command [PWD] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [257 "/"] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Sending command [TYPE I] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [200 TYPE set to I.] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Sending command [PASV] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [227 Entering Passive Mode (10,8,9,50,77,53)] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Sending command [STOR abc/def/hij/klm/nop/test.txt] System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [150 Ok to send data.] System.Net Verbose: 0 : [7584] Exiting FtpWebRequest#10964107::GetRequestStream() System.Net Information: 0 : [7584] FtpControlStream#62182359 - Received response [550 Access denied.] System.Net Information: 0 : [7584] FtpWebRequest#10964107::(Releasing FTP connection#62182359.)
没有关于错误的详细信息很难说，但似乎很可能在你的路径中的某个地方缺少一个目录。 如果在FTP文件路径中使用任何非标准字符，尝试的一件事是在将其添加到Url之前在其上使用HttpUtility.UrlPathEncode 。
要获取详细的故障排除信息，我在应用程序的.config文件的配置元素中添加以下内容：
另外，仅供参考，这是我用于上传的代码：
private static FtpWebRequest CreateFtpWebRequest(string ftpUrl, string userName, string password, bool useSsl, bool allowInvalidCertificate, bool useActiveFtp) { FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpUrl); request.Credentials = new NetworkCredential(userName, password); if (useSsl) { request.EnableSsl = true; if (allowInvalidCertificate) { ServicePointManager.ServerCertificateValidationCallback = ServicePointManager_ServerCertificateValidationCallback; } else { ServicePointManager.ServerCertificateValidationCallback = null; } } request.UsePassive = !useActiveFtp; return request; } private static void UploadFileToServer(string ftpUrl, string userName, string password, bool useSsl, bool allowInvalidCertificate, bool useActiveFtp, string filePath) { FtpWebRequest request = CreateFtpWebRequest(ftpUrl, userName, password, useSsl, allowInvalidCertificate, useActiveFtp); request.Method = WebRequestMethods.Ftp.UploadFile; long bytesReceived = 0; long bytesSent = 0; using (Stream requestStream = request.GetRequestStream()) using (FileStream uploadFileStream = File.OpenRead(filePath)) { // Note that this method call requires .NET 4.0 or higher. If using an earlier version it will need to be replaced. uploadFileStream.CopyTo(requestStream); bytesSent = uploadFileStream.Position; } using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) { bytesReceived = response.ContentLength; } }
我刚才遇到这个问题。 它刚刚出现在我多年来一直使用的代码上。 事实certificate，我一直在与许多ftp站点合作，并将相同的文件发送到所有这些ftp站点。 好吧，当我去一些ftp网站时，我被留在了根，但在其他人，我立即被放在一个子目录。 在此最近的更改之前，我可以使用请求流并将文件直接放在我放置的子目录上。 截至上周，我需要完全确定路径。
希望这有助于某人……
这个答案适用于Steen并包含一个PowerShell，它等同于下面的http://support.microsoft.com/kb/2134299中的代码。 我没有一个系统具有不合规的行为进行测试，因此您需要自己尝试。
function SetMethodRequiresCWD() { [Type] $requestType = [System.Net.FtpWebRequest] [System.Reflection.FieldInfo] $methodInfoField = $requestType.GetField("m_MethodInfo", [System.Reflection.BindingFlags]::NonPublic -bor [System.Reflection.BindingFlags]::Instance) [Type] $methodInfoType = $methodInfoField.FieldType [System.Reflection.FieldInfo] $knownMethodsField = $methodInfoType.GetField("KnownMethodInfo", [System.Reflection.BindingFlags]::Static -bor [System.Reflection.BindingFlags]::NonPublic) [Array] $knownMethodsArray = [Array]$knownMethodsField.GetValue($null); [System.Reflection.FieldInfo] $flagsField = $methodInfoType.GetField("Flags", [System.Reflection.BindingFlags]::NonPublic -bor [System.Reflection.BindingFlags]::Instance) [int] $MustChangeWorkingDirectoryToPath = 0x100 ForEach ($knownMethod In $knownMethodsArray) { [int] $flags = [int]$flagsField.GetValue($knownMethod) $flags = $flags -bor $MustChangeWorkingDirectoryToPath $flagsField.SetValue($knownMethod, $flags) } }