Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

VB.NET UWP/WinRT Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(VB.NET UWP/WinRT) SSH ReceiveUntilMatchN

Demonstrates how to call the SSH ChannelReceiveUntilMatchN method.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

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

Dim ssh As New Chilkat.Ssh
Dim success As Boolean

' For the sake of the example, pretend the remote shell prompt
' will be any of the following:
Dim saPrompts As New Chilkat.StringArray

saPrompts.Append("~$")
saPrompts.Append("mars#")
saPrompts.Append("jupiter%")
saPrompts.Append("chilkat$")
saPrompts.Append("admin>")


Dim cmdOutput As String

' Connect to an SSH server:
' Hostname may be an IP address or hostname:
Dim hostname As String = "www.some-ssh-server.com"
Dim port As Integer = 22

success = Await ssh.ConnectAsync(hostname,port)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Wait a max of 10 seconds when reading responses..
ssh.IdleTimeoutMs = 10000

' Authenticate using login/password:
success = Await ssh.AuthenticatePwAsync("myLogin","myPassword")
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Open a session channel.  (It is possible to have multiple
' session channels open simultaneously.)
Dim channelNum As Integer = Await ssh.OpenSessionChannelAsync()
If (channelNum < 0) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


Dim termType As String = "dumb"
Dim widthInChars As Integer = 120
Dim heightInChars As Integer = 40
' Use 0 for pixWidth and pixHeight when the dimensions
' are set in number-of-chars.
Dim pixWidth As Integer = 0
Dim pixHeight As Integer = 0
success = Await ssh.SendReqPtyAsync(channelNum,termType,widthInChars,heightInChars,pixWidth,pixHeight)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Start a shell on the channel:
success = Await ssh.SendReqShellAsync(channelNum)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


'  Run the 1st command in the remote shell, which will be to
'  "cd" to a subdirectory.
success = Await ssh.ChannelSendStringAsync(channelNum,"cd workspace" & vbLf,"utf-8")
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Retrieve the output to the next prompt:
Dim caseSensitiveMatch As Boolean = True
success = Await ssh.ChannelReceiveUntilMatchNAsync(channelNum,saPrompts,"utf-8",caseSensitiveMatch)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


'  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 <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If

Debug.WriteLine(cmdOutput)

'  Run the 2nd command in the remote shell, which will be
'  to "ls" the directory.
success = Await ssh.ChannelSendStringAsync(channelNum,"ls" & vbLf,"utf-8")
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Retrieve and display the output.
success = Await ssh.ChannelReceiveUntilMatchNAsync(channelNum,saPrompts,"utf-8",caseSensitiveMatch)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


cmdOutput = ssh.GetReceivedText(channelNum,"utf-8")
If (ssh.LastMethodSuccess <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If

Debug.WriteLine(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 = Await ssh.ChannelSendStringAsync(channelNum,"ls -l" & vbLf,"utf-8")
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If



' 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 = Await ssh.ChannelSendEofAsync(channelNum)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' 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.
Dim pollTimeoutMs As Integer = 2000
Dim n As Integer = Await ssh.ChannelReadAndPollAsync(channelNum,pollTimeoutMs)
If (n < 0) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Close the channel:
success = Await ssh.ChannelSendCloseAsync(channelNum)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' 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 = Await ssh.ChannelReceiveToCloseAsync(channelNum)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


cmdOutput = ssh.GetReceivedText(channelNum,"utf-8")
If (ssh.LastMethodSuccess <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If

Debug.WriteLine(cmdOutput)

' Disconnect
ssh.Disconnect()

 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.