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(C# UWP/WinRT) Co:Z SFTP Binary File Download (from z/OS IBM Mainframe)

Demonstrates how to download a binary file, such as a .zip, from a Co:Z SFTP server on a z/OS IBM Mainframe.

Note: This requires Chilkat v9.5.0.76 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.SFtp sftp = new Chilkat.SFtp();

// Connect to the SSH server.  
string hostname = "sftp.example.com";
int port = 22;
bool success = await sftp.ConnectAsync(hostname,port);
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

success = await sftp.AuthenticatePwAsync("myLogin","myPassword");
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

success = await sftp.InitializeSftpAsync();
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// To download a binary file from the Co:Z SFTP server, 
// we must switch to binary mode in the following unconventional way.
// We pretend to fetch a directory listing for "/+mode=binary"
// This has the effect of putting the server in binary mode for transfers.
string handle = await sftp.OpenDirAsync("/+mode=binary");
if (sftp.LastMethodSuccess != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// Download the "directory listing" (but it's not actually a directory listing, and we'll just discard it.)
Chilkat.SFtpDir dirListing = await sftp.ReadDirAsync(handle);
if (sftp.LastMethodSuccess != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// Close the directory handle:
success = await sftp.CloseHandleAsync(handle);
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

// Download the binary file:
string localFilePath = "c:/temp/test.zip";
string remoteFilePath = "test.zip";
success = await sftp.DownloadFileByNameAsync(remoteFilePath,localFilePath);
if (success != true) {
    Debug.WriteLine(sftp.LastErrorText);
    return;
}

Debug.WriteLine("Success.");

 

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