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(PowerShell) SSH ReceiveUntilMatchNDemonstrates how to call the SSH ChannelReceiveUntilMatchN method.
Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll" # This example assumes the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. $ssh = New-Object Chilkat.Ssh # For the sake of the example, pretend the remote shell prompt # will be any of the following: $saPrompts = New-Object Chilkat.StringArray $saPrompts.Append("~$") $saPrompts.Append("mars#") $saPrompts.Append("jupiter%") $saPrompts.Append("chilkat$") $saPrompts.Append("admin>") # Connect to an SSH server: # Hostname may be an IP address or hostname: $hostname = "www.some-ssh-server.com" $port = 22 $success = $ssh.Connect($hostname,$port) if ($success -ne $true) { $($ssh.LastErrorText) exit } # Wait a max of 10 seconds when reading responses.. $ssh.IdleTimeoutMs = 10000 # Authenticate using login/password: $success = $ssh.AuthenticatePw("myLogin","myPassword") if ($success -ne $true) { $($ssh.LastErrorText) exit } # Open a session channel. (It is possible to have multiple # session channels open simultaneously.) $channelNum = $ssh.OpenSessionChannel() if ($channelNum -lt 0) { $($ssh.LastErrorText) exit } $termType = "dumb" $widthInChars = 120 $heightInChars = 40 # Use 0 for pixWidth and pixHeight when the dimensions # are set in number-of-chars. $pixWidth = 0 $pixHeight = 0 $success = $ssh.SendReqPty($channelNum,$termType,$widthInChars,$heightInChars,$pixWidth,$pixHeight) if ($success -ne $true) { $($ssh.LastErrorText) exit } # Start a shell on the channel: $success = $ssh.SendReqShell($channelNum) if ($success -ne $true) { $($ssh.LastErrorText) exit } # Run the 1st command in the remote shell, which will be to # "cd" to a subdirectory. $success = $ssh.ChannelSendString($channelNum,"cd workspace`n","utf-8") if ($success -ne $true) { $($ssh.LastErrorText) exit } # Retrieve the output to the next prompt: $caseSensitiveMatch = $true $success = $ssh.ChannelReceiveUntilMatchN($channelNum,$saPrompts,"utf-8",$caseSensitiveMatch) if ($success -ne $true) { $($ssh.LastErrorText) exit } # Display what we've received so far. This clears # the internal receive buffer, which is important. # After we send the command, we'll be reading until # the next command prompt. If the command prompt # is already in the internal receive buffer, it'll think it's # already finished... $cmdOutput = $ssh.GetReceivedText($channelNum,"utf-8") if ($ssh.LastMethodSuccess -ne $true) { $($ssh.LastErrorText) exit } $($cmdOutput) # Run the 2nd command in the remote shell, which will be # to "ls" the directory. $success = $ssh.ChannelSendString($channelNum,"ls`n","utf-8") if ($success -ne $true) { $($ssh.LastErrorText) exit } # Retrieve and display the output. $success = $ssh.ChannelReceiveUntilMatchN($channelNum,$saPrompts,"utf-8",$caseSensitiveMatch) if ($success -ne $true) { $($ssh.LastErrorText) exit } $cmdOutput = $ssh.GetReceivedText($channelNum,"utf-8") if ($ssh.LastMethodSuccess -ne $true) { $($ssh.LastErrorText) exit } $($cmdOutput) # Start the final command in the remote shell. This example # will send a "ls -l" command to retrieve the long format directory listing. $success = $ssh.ChannelSendString($channelNum,"ls -l`n","utf-8") if ($success -ne $true) { $($ssh.LastErrorText) exit } # Send an EOF. This tells the server that no more data will # be sent on this channel. The channel remains open, and # the SSH client may still receive output on this channel. $success = $ssh.ChannelSendEof($channelNum) if ($success -ne $true) { $($ssh.LastErrorText) exit } # Read whatever output may already be available on the # SSH connection. ChannelReadAndPoll returns the number of bytes # that are available in the channel's internal buffer that # are ready to be "picked up" by calling GetReceivedText # or GetReceivedData. # A return value of -1 indicates failure. # A return value of -2 indicates a failure via timeout. # The ChannelReadAndPoll method waits # for data to arrive on the connection usingi the IdleTimeoutMs # property setting. Once the first data arrives, it continues # reading but instead uses the pollTimeoutMs passed in the 2nd argument: # A return value of -2 indicates a timeout where no data is received. $pollTimeoutMs = 2000 $n = $ssh.ChannelReadAndPoll($channelNum,$pollTimeoutMs) if ($n -lt 0) { $($ssh.LastErrorText) exit } # Close the channel: $success = $ssh.ChannelSendClose($channelNum) if ($success -ne $true) { $($ssh.LastErrorText) exit } # Perhaps we did not receive all of the commands output. # To make sure, call ChannelReceiveToClose to accumulate any remaining # output until the server's corresponding "channel close" is received. $success = $ssh.ChannelReceiveToClose($channelNum) if ($success -ne $true) { $($ssh.LastErrorText) exit } $cmdOutput = $ssh.GetReceivedText($channelNum,"utf-8") if ($ssh.LastMethodSuccess -ne $true) { $($ssh.LastErrorText) exit } $($cmdOutput) # Disconnect $ssh.Disconnect() |
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