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C# UWP/WinRT Examples

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(C# UWP/WinRT) SSH Quick/Simple Shell Session

Demonstrates the simplified way to run multiple commands in a shell session on an SSH server.

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// This example assumes Chilkat SSH/SFTP to have been previously unlocked.
// See Unlock SSH for sample code.

Chilkat.Ssh ssh = new Chilkat.Ssh();

int port = 22;
bool success = await ssh.ConnectAsync("the-ssh-server.com",port);
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Authenticate using login/password:
success = await ssh.AuthenticatePwAsync("theSshLogin","theSshPassword");
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Start a shell session.
// (The QuickShell method was added in Chilkat v9.5.0.65)
int channelNum = await ssh.QuickShellAsync();
if (channelNum < 0) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Construct a StringBuilder with multiple commands, one per line.
// Note: The line-endings are potentially important.  Some SSH servers may
// require either LF or CRLF line endings.  (Unix/Linux/OSX servers typically
// use bare-LF line endings.  Windows servers likely use CRLF line endings.)
Chilkat.StringBuilder sbCommands = new Chilkat.StringBuilder();
sbCommands.Append("echo hello world\n");
sbCommands.Append("date\n");
sbCommands.Append("df\n");

// For our last command, we're going to echo a marker string that
// we'll use in ChannelReceiveUntilMatch below.
// The use of single quotes around 'IS' is a trick so that the output
// of the command is "THIS IS THE END OF THE SCRIPT", but the terminal echo
// includes the single quotes.  This allows us to read until we see the actual
// output of the last command.
sbCommands.Append("echo THIS 'IS' THE END OF THE SCRIPT\n");

// Send the commands..
success = await ssh.ChannelSendStringAsync(channelNum,sbCommands.GetAsString(),"ansi");
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Send an EOF to indicate no more commands will be sent.
// For brevity, we're not checking the return values of each method call.
// Your code should check the success/failure of each call.
success = await ssh.ChannelSendEofAsync(channelNum);

// Receive output up to our marker.
success = await ssh.ChannelReceiveUntilMatchAsync(channelNum,"THIS IS THE END OF THE SCRIPT","ansi",true);

// Close the channel.
// It is important to close the channel only after receiving the desired output.
success = await ssh.ChannelSendCloseAsync(channelNum);

// Get any remaining output..
success = await ssh.ChannelReceiveToCloseAsync(channelNum);

// Get the complete output for all the commands in the session.
Debug.WriteLine("--- output ----");
Debug.WriteLine(ssh.GetReceivedText(channelNum,"ansi"));

// Here's our actual sample output:

// 	Last login: Thu Dec 22 20:19:09 2016 from chilkat13
// 
// 	echo hello world
// 	date
// 	df
// 	echo THIS 'IS' THE END OF THE SCRIPT
// 	chilkatosx:~ chilkat$ echo hello world
// 	hello world
// 	chilkatosx:~ chilkat$ date
// 	Thu Dec 22 20:30:48 CST 2016
// 	chilkatosx:~ chilkat$ df
// 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
// 	/dev/disk2    2176716032 265768928 1910435104    13% 33285114 238804388   12%   /
// 	devfs                383       383          0   100%      664         0  100%   /dev
// 	map -hosts             0         0          0   100%        0         0  100%   /net
// 	map auto_home          0         0          0   100%        0         0  100%   /home
// 	/dev/disk3s2      374668    374668          0   100%    93665         0  100%   /Volumes/Google Chrome
// 	chilkatosx:~ chilkat$ echo THIS 'IS' THE END OF THE SCRIPT
// 	THIS IS THE END OF THE SCRIPT
// 	chilkatosx:~ chilkat$ 

 

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