Question

我在搜索并发现了其他问题，但没有一个能解决我的问题。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）此行上的文件不可用（例如，找不到文件，没有访问权限）错误：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();

我已经仔细检查了空格的URI，但没有。我能够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.)

Answer 1

这就是诀窍。显然，在从.NET 3.5迁移到4.0时，CWD命令行为发生了变化。

您必须先在此链接中调用该方法。

http://support.microsoft.com/kb/2134299

Answer 2

如果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。如果您在FTP文件路径中使用任何非标准字符，请尝试使用HttpUtility.UrlPathEncode，然后再将其添加到Url中。

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：

<system.diagnostics>
  <sources>
    <source name="System.Net">
      <listeners>
        <add name="TraceFile"/>
      </listeners>
    </source>
    <source name="System.Net.Sockets" maxdatasize="1024">
      <listeners>
        <add name="TraceFile"/>
      </listeners>
    </source>
  </sources>
  <sharedListeners>
    <add name="TraceFile" type="System.Diagnostics.TextWriterTraceListener" initializeData="System.Net.trace.log" traceOutputOptions="DateTime"/>
  </sharedListeners>
  <switches>
    <add name="System.Net" value="Verbose"/>
    <!--<add name="System.Net.Sockets" value="Verbose"/>-->
  </switches>
  <trace autoflush="true" />
</system.diagnostics>

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;
        }
    }

Answer 3

我最近才遇到这个问题。它刚刚出现在我多年来一直使用的代码上。事实证明，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......

Answer 4

这个答案适用于Steen，包含一个与下面http://support.microsoft.com/kb/2134299中的代码等效的PowerShell。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)
    }
}

FtpWebRequest类文件上传时出现550文件不可用错误。在FileZilla中正常工作

编辑＃1（从System.Net添加错误日志）

4 个答案: