My client has configured a SFTP server and monitoring the folder using FileWatcher. As soon s as the file are copied to SFTP server, client picks them.
If the connection is broke down while transferring the file, client picks the invalid file.
In between, I go for deleting the invalid file, client has already picked and delete that file from that folder.
How I can stop access for client to that file until I finish the full transaction.
There exist two generic options - upload the file to different folder and move it (you have denied this for your particular case) and upload the file with different name and rename the file once upload is complete.
If you control the server's architecture, you can do the following trick: upload the file with the name of filename..ext . The server will check the file name and know expected size. Once the file is of specified size, it can be picked and renamed by the server.
You should use a temporary folder for upload, and move the files in the monitored folder only when the file is completely upload.
Related
there is a project assigned to me that create some files and send those files using SFTP to some server. there is another programme to read and send that files to another place(the files first programme sent to the server). it checks continuously new files from the server and read it and send. but the problem is sometimes the second program read files not completely imported to that server. that cause system to crash. they told me to do change in the first program before sending files, rename the files first and send and after finished upload rename again the sent files, files that in the server. is this possible to or is a there better way to do this. is there anyone have some ideas I'm kindly asking to share with me
That it's a good synchronization method, I mean using a temporary name during the transfer and the rename at once at the end.
The implementation depends on which approach you've used in the program.
It should be something like this:
// Rename the file or directory:
success = sftp.RenameFileOrDir("oldFilename.txt","newFilename.txt");
if (success != true) {
Console.WriteLine(sftp.LastErrorText);
return;
}
Basically:
Catch the event of transfer completed
Request the RENAME command
I have a ftp application. This application uses ftp rename command. If a file already exists in a directory which the file is renamed to, the error message 'the file not avaliable' caught. What can I do in c# to overwrite a file? In IIS there is a setting for this. When I do this, there is no problem.But,can I do this from c#?
What happens when there is a name collision depends on the server, if you cannot configure a known behaviour on each server you connect to you need to deal with it manually.
Either attempt a rename, catch the exception, delete the file then rename again or check for the files existence first (by requesting it size for example) and deleting it if found.
I'm an administrator for NoName!! Company that has a router. The router creates log files (with at least 500 MB of size for each log) and sends them to our FTP server.
The log file name is like this: NoName-[2014-4-4]-03-1.log. You can see the date of create of log file in FTP server.
So I will to write a program to delete ten old log files from specific folder in FTP server which have LSD-RMZ name.
And this program must run in FTP server.
How can I search and find and delete Ten old file from LSD-RMZ Folder in C#?
Directory.GetFiles(path)
.Where(x=>Regex.IsMatch(x,#"\w+\[\d+-\d+-\d+\]-\d+-\d+\.log"))
.OrderBy(x=>DateTime.Parse(Regex.Match(x,#"(?<=\[).*?(?=\])").Value))
.Take(10)
.ToList()
.ForEach(x=>File.Delete(x));
So I was trying to upload a 1kb text file to my ftp server but this error comes up:
The remote server returned an error: (553) File name not allowed.
so what's wrong with my code?
WebClient upload = new WebClient();
upload.Credentials = new NetworkCredential("******", "*********");
upload.UploadFile("ftp://xxx.com/public_html", "G:/adress.txt");
It's hard to tell, because it's a server error not a code error. However, as currently written, you're trying to upload the file called adress.txt to become a file named public_html. I suspect there's already a directory with that name, and the conflict is preventing the upload. Try
upload.UploadFile("ftp://xxx.com/public_html/adress.txt", "G:/adress.txt");
instead.
This might not apply to you, but if it is a Linux FTP server:
This may help for Linux FTP server.
So, Linux FTP servers unlike IIS don't have common FTP root directory.
Instead, when you log on to FTP server under some user's credentials,
this user's root directory is used. So FTP directory hierarchy starts
from /root/ for root user and from /home/username for others.
So, if you need to query a file not relative to user account home
directory, but relative to file system root, add an extra / after
server name. Resulting URL will look like:
ftp://servername.net//var/lalala
Instead of:
ftp://xxx.com/public_html
You would need a second slash after the server name in addition to the full file name:
ftp://xxx.com//public_html/adress.txt
I ran into this same issue and it fixed it for me.
Source:
Can't connect to FTP: (553) File name not allowed
Using the .NET assembly of WinSCP to upload a file. OperationResultBase.Check() is throwing the following error:
WinSCP.SessionRemoteException: Transfer was successfully finished, but temporary transfer file 'testfile.zip.filepart' could not be renamed to target file name 'testfile.zip'. If the problem persists, you may want to turn off transfer resume support.
It seems that this happens with any zip file that I try to send. If it makes a difference, these are zip files that were created using the DotNetZip library.
Code that I'm using, taken pretty much directly from the example in the WinSCP documentation:
public void uploadFile(string filePath, string remotePath)
{
TransferOptions transferOptions = new TransferOptions();
transferOptions.TransferMode = TransferMode.Binary;
TransferOperationResult transferResult;
transferResult = currentSession.PutFiles(filePath, remotePath, false, transferOptions);
transferResult.Check();
foreach (TransferEventArgs transfer in transferResult.Transfers)
{
Console.WriteLine("Upload of {0} succeeded", transfer.FileName);
}
}
Discussion over at the WinSCP forum indicates that the assembly doesn't yet allow programmatic control of transfer resume support. Is there a workaround for this?
It sounds as if the filesystem on the destination server where the file is getting uploaded to does not allow file change permissions. This could be causing the renaming of the file at the finish of the upload to fail despite the fact that the complete file was uploaded and written to the filesystem with the temporary file name used while the transfer was in progress. If you don't have administrative access to the destination server, you can test that by trying to rename a file that is already on the destination server. If that fails also, then you will either need to have the proper permissions on the destination server changed in order for that to work. Otherwise you might have to use the advice provided in your error message to turn off the resume support so it is initially opened for writing with the desired filename instead of the temporary filename (with the .filepart extension).
Turn off the resumesupport:
put *.txt -nopreservetime -nopermissions -resumesupport=off
It would help, if you included full error message, including root cause as returned by the server.
My guess is that there's an antivirus application (or similar) running on the server-side. The antivirus application checks any file once upload finishes. That conflicts with WinSCP attempt to rename the file once the upload is finished. The problem may tend to occur more frequently for .ZIP archives, either because they tend to be larger or simply because they need to get extracted before the check (what takes time).
Anyway, you can disable the transfer to temporary file name using the TransferOptions.ResumeSupport.
See also the documentation for the error message "Transfer was successfully finished, but temporary transfer file ... could not be renamed to target file name ..."
All you have to do is to disable TransferResumeSupport using the below code.
transferOptions.ResumeSupport = new TransferResumeSuppor {State = TransferResumeSupportState.Off };