Удаленный сервер возвратил ошибку 550 файл недоступен например не найден или к нему нет доступа

asked Jul 4, 2013 at 13:37

answered Oct 1, 2018 at 7:16

In order to resolve this issue, it is required to force the System.Net.FtpWebRequest command to revert back to the old behavior of how it used to work in .Net Framework 2.0/3.5 and issue the extra CWD command before issuing the actual command.

In order to do this, the following code needs to be placed before any instance of the System.Net.FtpWebRequest class is invoked.
The code below only needs to be called once, since it changes the settings of the entire application domain.

private static void SetMethodRequiresCWD()
{
        Type requestType = typeof(FtpWebRequest);
        FieldInfo methodInfoField = requestType.GetField("m_MethodInfo", BindingFlags.NonPublic | BindingFlags.Instance);
        Type methodInfoType = methodInfoField.FieldType;


        FieldInfo knownMethodsField = methodInfoType.GetField("KnownMethodInfo", BindingFlags.Static | BindingFlags.NonPublic);
        Array knownMethodsArray = (Array)knownMethodsField.GetValue(null);

        FieldInfo flagsField = methodInfoType.GetField("Flags", BindingFlags.NonPublic | BindingFlags.Instance);

        int MustChangeWorkingDirectoryToPath = 0x100;
        foreach (object knownMethod in knownMethodsArray)
        {
            int flags = (int)flagsField.GetValue(knownMethod);
            flags |= MustChangeWorkingDirectoryToPath;
            flagsField.SetValue(knownMethod, flags);
        }
 }

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

answered Nov 6, 2013 at 21:44

Make sure target folder «outbox» exists.
That was my problem with error 550.

Simply create target directory «output» before upload.

try
        {
            WebRequest request = WebRequest.Create("ftp://" + ftpServerIP + "/outbox");
            request.Credentials = new NetworkCredential("user", "password");
            request.Method = WebRequestMethods.Ftp.MakeDirectory;
            using (var resp = (FtpWebResponse)request.GetResponse())
            {
                Console.WriteLine(resp.StatusCode);
            }
        }
        catch (WebException ex)
        {
            FtpWebResponse response = (FtpWebResponse)ex.Response;
            if (response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable)
            {
                response.Close();
                //already exists
            }
            else
            {
                response.Close();
                //doesn't exists = it's another exception
            }
        }

answered Jul 31, 2017 at 12:30

I had this problem. Filezilla was fine, .net wasn’t. It was to a wordpress server.
To get it working, I changed the my code from this:

ftp://XXX.XXX.XXX.XXX//folder//» + txtFile.Text

to:

ftp://[FTPNAME]@XXX.XXX.XXX.XXX//» + txtFile.Text

and it now thankfully works.

I don’t know if this is specific to WordPress FTP folders.

answered Oct 25, 2017 at 9:43

In my case, there was a root folder referenced in my ftp address that was missing.
After to create the folder the problem was solved.

ftp://xxx.xxx.xx.xx:21//rootfolder/

answered Mar 16, 2018 at 18:04

I was also having the same issue. After monitoring the traffic with WireShark I understood the problem

I had set up a new FTP site on my local IIS FTP server named ‘testftp’
The ‘testftp’ site was pointing to a folder named d:ftp on my computer’s hard disk
I was getting the ‘550’ error whenever i tried to execute the line in bold in C# code below
ftpHostURL=»ftp://127.0.0.1/testftp/test.htm»;
request = (FtpWebRequest)WebRequest.Create(ftpHostURL);
request.Proxy = new WebProxy(); //——Proxy bypassing(The requested FTP command is not supported when using HTTP proxy)

            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential(ftpUserName, ftpPassword);
           // uploadFilePath = "d://test//tt.txt";
            using (var requestStream = request.GetRequestStream())
            {
                using (var input = File.OpenRead(uploadFilePath))
                {
                    input.CopyTo(requestStream);
                }
            }

I tried a lot of solutions mentioned in various websites but nothing helped. Then I came across a site that suggested to use WireShark to monitor the traffic.

On monitoring the traffic using the RawCap Utility I saw that the application was trying to execute the code below

STOR testftp/test.htm

Then I understood the problem. IIS was expecting a folder named ‘testftp‘ to be there under the ftp root folder which was not there.
I was considering ‘testftp‘ as the name of the virtual folder created in IIS where as IIS understood it as a folder under the FTP root

Creating a folder named ‘testftp‘ under the FTP root folder solved my issue.

Hope this is helpful to someone

Regards
Mathew

answered Nov 5, 2019 at 5:49

Just to throw my hat in the ring, I was getting the same error. When the FTPRequest was requesting files from the FTP Service on the same computer (same IP). In the request I was using the IP address of the machine but once I changed that to 127.0.0.1 it worked. interestingly enough, requests from other IP addresses were being processed and files downloaded, just not from itself.

Hope that helped someone.

answered Nov 16, 2015 at 1:50

When i had the same issue i tried everything above and after a day later i realize that the path which i created for uri having a white space in between «/» and the folder name

string uri="192.168.1.101/ Sync/Image.jpg";

the above string should be

string uri="192.168.1.101/Sync/Image.jpg";

this small mistake also throws the same error and it’s a valid error because this is not valid path for our file if it contains any white spaces between «/» and folder/file name

answered Sep 15, 2016 at 9:14

I was having the same problem, when i compared with the ftpuri and User Name Path it is resolved
When I create ftp access i have chose the path as /directory name

in the ftpuri when i included the directory name it gave the error and when i removed the directory name it is resolved.

ftpuri with error

«ftp://www.example.com/Project/yourfilename.ds»

ftpuri resolved

«ftp://www.example.com/yourfilename.ds»

ftp access folder
«/Project»

answered Feb 1, 2017 at 13:54

asked Jul 4, 2013 at 13:37

answered Oct 1, 2018 at 7:16

In order to resolve this issue, it is required to force the System.Net.FtpWebRequest command to revert back to the old behavior of how it used to work in .Net Framework 2.0/3.5 and issue the extra CWD command before issuing the actual command.

In order to do this, the following code needs to be placed before any instance of the System.Net.FtpWebRequest class is invoked.
The code below only needs to be called once, since it changes the settings of the entire application domain.

private static void SetMethodRequiresCWD()
{
        Type requestType = typeof(FtpWebRequest);
        FieldInfo methodInfoField = requestType.GetField("m_MethodInfo", BindingFlags.NonPublic | BindingFlags.Instance);
        Type methodInfoType = methodInfoField.FieldType;


        FieldInfo knownMethodsField = methodInfoType.GetField("KnownMethodInfo", BindingFlags.Static | BindingFlags.NonPublic);
        Array knownMethodsArray = (Array)knownMethodsField.GetValue(null);

        FieldInfo flagsField = methodInfoType.GetField("Flags", BindingFlags.NonPublic | BindingFlags.Instance);

        int MustChangeWorkingDirectoryToPath = 0x100;
        foreach (object knownMethod in knownMethodsArray)
        {
            int flags = (int)flagsField.GetValue(knownMethod);
            flags |= MustChangeWorkingDirectoryToPath;
            flagsField.SetValue(knownMethod, flags);
        }
 }

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

answered Nov 6, 2013 at 21:44

Make sure target folder «outbox» exists.
That was my problem with error 550.

Simply create target directory «output» before upload.

try
        {
            WebRequest request = WebRequest.Create("ftp://" + ftpServerIP + "/outbox");
            request.Credentials = new NetworkCredential("user", "password");
            request.Method = WebRequestMethods.Ftp.MakeDirectory;
            using (var resp = (FtpWebResponse)request.GetResponse())
            {
                Console.WriteLine(resp.StatusCode);
            }
        }
        catch (WebException ex)
        {
            FtpWebResponse response = (FtpWebResponse)ex.Response;
            if (response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable)
            {
                response.Close();
                //already exists
            }
            else
            {
                response.Close();
                //doesn't exists = it's another exception
            }
        }

answered Jul 31, 2017 at 12:30

I had this problem. Filezilla was fine, .net wasn’t. It was to a wordpress server.
To get it working, I changed the my code from this:

ftp://XXX.XXX.XXX.XXX//folder//» + txtFile.Text

to:

ftp://[FTPNAME]@XXX.XXX.XXX.XXX//» + txtFile.Text

and it now thankfully works.

I don’t know if this is specific to WordPress FTP folders.

answered Oct 25, 2017 at 9:43

In my case, there was a root folder referenced in my ftp address that was missing.
After to create the folder the problem was solved.

ftp://xxx.xxx.xx.xx:21//rootfolder/

answered Mar 16, 2018 at 18:04

I was also having the same issue. After monitoring the traffic with WireShark I understood the problem

I had set up a new FTP site on my local IIS FTP server named ‘testftp’
The ‘testftp’ site was pointing to a folder named d:ftp on my computer’s hard disk
I was getting the ‘550’ error whenever i tried to execute the line in bold in C# code below
ftpHostURL=»ftp://127.0.0.1/testftp/test.htm»;
request = (FtpWebRequest)WebRequest.Create(ftpHostURL);
request.Proxy = new WebProxy(); //——Proxy bypassing(The requested FTP command is not supported when using HTTP proxy)

            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential(ftpUserName, ftpPassword);
           // uploadFilePath = "d://test//tt.txt";
            using (var requestStream = request.GetRequestStream())
            {
                using (var input = File.OpenRead(uploadFilePath))
                {
                    input.CopyTo(requestStream);
                }
            }

I tried a lot of solutions mentioned in various websites but nothing helped. Then I came across a site that suggested to use WireShark to monitor the traffic.

On monitoring the traffic using the RawCap Utility I saw that the application was trying to execute the code below

STOR testftp/test.htm

Then I understood the problem. IIS was expecting a folder named ‘testftp‘ to be there under the ftp root folder which was not there.
I was considering ‘testftp‘ as the name of the virtual folder created in IIS where as IIS understood it as a folder under the FTP root

Creating a folder named ‘testftp‘ under the FTP root folder solved my issue.

Hope this is helpful to someone

Regards
Mathew

answered Nov 5, 2019 at 5:49

Just to throw my hat in the ring, I was getting the same error. When the FTPRequest was requesting files from the FTP Service on the same computer (same IP). In the request I was using the IP address of the machine but once I changed that to 127.0.0.1 it worked. interestingly enough, requests from other IP addresses were being processed and files downloaded, just not from itself.

Hope that helped someone.

answered Nov 16, 2015 at 1:50

When i had the same issue i tried everything above and after a day later i realize that the path which i created for uri having a white space in between «/» and the folder name

string uri="192.168.1.101/ Sync/Image.jpg";

the above string should be

string uri="192.168.1.101/Sync/Image.jpg";

this small mistake also throws the same error and it’s a valid error because this is not valid path for our file if it contains any white spaces between «/» and folder/file name

answered Sep 15, 2016 at 9:14

I was having the same problem, when i compared with the ftpuri and User Name Path it is resolved
When I create ftp access i have chose the path as /directory name

in the ftpuri when i included the directory name it gave the error and when i removed the directory name it is resolved.

ftpuri with error

«ftp://www.example.com/Project/yourfilename.ds»

ftpuri resolved

«ftp://www.example.com/yourfilename.ds»

ftp access folder
«/Project»

answered Feb 1, 2017 at 13:54

У меня тоже была эта проблема в последнее время. Я обнаружил, что когда я использую ftpUploadFile, программа пытается поместить файл в корневую папку ftp. Нормальная командная строка ftp работала нормально. Однако выдача команды pwd из командной строки ftp показала, что этот конкретный сервер устанавливал другой текущий каталог при входе в систему. Изменение моей ftpUploadFile для включения этой папки разрешило проблему.

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asked Mar 10, 2013 at 5:43

answered Apr 3, 2013 at 22:18

In order to resolve this issue, it is required to force the System.Net.FtpWebRequest command to revert back to the old behavior of how it used to work in .Net Framework 2.0/3.5 and issue the extra CWD command before issuing the actual command.

In order to do this, the following code needs to be placed before any instance of the System.Net.FtpWebRequest class is invoked. The code below only needs to be called once, since it changes the settings of the entire application domain.

private static void SetMethodRequiresCWD()
{
    Type requestType = typeof(FtpWebRequest);
    FieldInfo methodInfoField = requestType.GetField("m_MethodInfo", BindingFlags.NonPublic | BindingFlags.Instance);
    Type methodInfoType = methodInfoField.FieldType;


    FieldInfo knownMethodsField = methodInfoType.GetField("KnownMethodInfo", BindingFlags.Static | BindingFlags.NonPublic);
    Array knownMethodsArray = (Array)knownMethodsField.GetValue(null);

    FieldInfo flagsField = methodInfoType.GetField("Flags", BindingFlags.NonPublic | BindingFlags.Instance);

    int MustChangeWorkingDirectoryToPath = 0x100;
    foreach (object knownMethod in knownMethodsArray)
    {
        int flags = (int)flagsField.GetValue(knownMethod);
        flags |= MustChangeWorkingDirectoryToPath;
        flagsField.SetValue(knownMethod, flags);
    }
}

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

answered Nov 6, 2013 at 21:58

asked Mar 10, 2013 at 5:43

answered Apr 3, 2013 at 22:18

In order to resolve this issue, it is required to force the System.Net.FtpWebRequest command to revert back to the old behavior of how it used to work in .Net Framework 2.0/3.5 and issue the extra CWD command before issuing the actual command.

In order to do this, the following code needs to be placed before any instance of the System.Net.FtpWebRequest class is invoked. The code below only needs to be called once, since it changes the settings of the entire application domain.

private static void SetMethodRequiresCWD()
{
    Type requestType = typeof(FtpWebRequest);
    FieldInfo methodInfoField = requestType.GetField("m_MethodInfo", BindingFlags.NonPublic | BindingFlags.Instance);
    Type methodInfoType = methodInfoField.FieldType;


    FieldInfo knownMethodsField = methodInfoType.GetField("KnownMethodInfo", BindingFlags.Static | BindingFlags.NonPublic);
    Array knownMethodsArray = (Array)knownMethodsField.GetValue(null);

    FieldInfo flagsField = methodInfoType.GetField("Flags", BindingFlags.NonPublic | BindingFlags.Instance);

    int MustChangeWorkingDirectoryToPath = 0x100;
    foreach (object knownMethod in knownMethodsArray)
    {
        int flags = (int)flagsField.GetValue(knownMethod);
        flags |= MustChangeWorkingDirectoryToPath;
        flagsField.SetValue(knownMethod, flags);
    }
}

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

answered Nov 6, 2013 at 21:58