WSAECONNRESET An existing connection was forcibly closed by the remote host.

Explains the meaning of the "WSAECONNRESET An existing connection was forcibly closed by the remote host." error and demonstrates a way to reproduce it by setting the "No Transfer Timeout" setting on a FileZilla FTP server to a very small value.

Download 32-bit Chilkat FTP2 ActiveX (.msi)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @ftp int
    EXEC @hr = sp_OACreate 'Chilkat.Ftp2', @ftp OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @success int

    --  Any string unlocks the component for the 1st 30-days.
    EXEC sp_OAMethod @ftp, 'UnlockComponent', @success OUT, 'Anything for 30-day trial'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        RETURN
      END

    EXEC sp_OASetProperty @ftp, 'Hostname', '192.168.1.108'
    EXEC sp_OASetProperty @ftp, 'Username', 'myLogin'
    EXEC sp_OASetProperty @ftp, 'Password', 'myPassword'

    --  Connect and login to the FTP server.
    EXEC sp_OAMethod @ftp, 'Connect', @success OUT
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        RETURN
      END

    EXEC sp_OASetProperty @ftp, 'Passive', 1

    --  In this example, we've set the FileZilla FTP Server's
    --  "No Transfer Timeout" to 5 seconds.  This is a setting
    --  on the FTP server (not in the Chilkat FTP component).
    --  It causes the server to disconnect from the client after
    --  5 seconds of no upload or download activity.  As you'll see,
    --  sending commands over the control channel, such as
    --  NOOP (no-operation) commands will have no effect.
    --  It is an upload, download, or directory listing that is required.

    --  This code will wait 10 seconds before proceeding with
    --  the PutFile.  This should be enough time for the FileZilla
    --  server to disconnect.
    DECLARE @i int

    SELECT @i = 0
    WHILE @i <= 10
      BEGIN
        --  Sleep for 1 second
        EXEC sp_OAMethod @ftp, 'SleepMs', NULL, 1000

        --  Send a NOOP command to the FTP server.
        --  After about 5 iterations, it should fail and the LastErrorText
        --  will contain this message:
        --  WSAECONNRESET An existing connection was forcibly closed by the remote host.
        EXEC sp_OAMethod @ftp, 'Noop', @success OUT
        IF @success <> 1
          BEGIN
            EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT

            PRINT @sTmp0
            BREAK
          END
        SELECT @i = @i + 1
      END

    --  What happens if we try to upload a file without an existing
    --  connection?
    --  Let's do it and find out...

    --  Upload a file.
    DECLARE @localFilename nvarchar(4000)

    SELECT @localFilename = 'c:/temp/hamlet.xml'
    DECLARE @remoteFilename nvarchar(4000)

    SELECT @remoteFilename = 'hamlet.xml'

    EXEC sp_OAMethod @ftp, 'PutFile', @success OUT, @localFilename, @remoteFilename
    IF @success <> 1
      BEGIN

        --  In Active mode (i.e. non-passive), we get this error:
        --  "Failed to get socket's IP address. Socket may already be disconnected."
        --  In Passive mode, we'll get this error:
        --  " No socket exists for sending (2)"
        EXEC sp_OAGetProperty @ftp, 'LastErrorText', @sTmp0 OUT

        PRINT @sTmp0
        RETURN
      END

    EXEC sp_OAMethod @ftp, 'Disconnect', NULL

    PRINT 'File Uploaded!'
END
GO