A user at PowerShellCommunity.org asked how to send a Jabber message using PowerShell. There is a set of commercial cmdlets available from /n software that can do this (and a lot more), but they are a little pricey for the casual user. As luck would have it, PowerShell makes it super easy to work with .NET stuff and I happened to know there was a few .NET libraries already in existence. After reviewing what was available, I decided on Alex Gnauck’s excellent agsXMPP SDK.
It took a bit of work to translate the C# examples to PowerShell, but there was another guy at AG-Software forums who was working on this as well and he had an example I could work with. Also, Alex was a great help in some troubleshooting.
Next step–a Jabber bot. 
So, without further ado, the code (script repository link):
1: # Download XMPP SDK from http://www.ag-software.de/index.php?page=agsxmpp-sdk
2: function Send-XmppMessage {
3: param (
4: $From = $( Throw "You must specify a Jabber ID for the sender." ),
5: $Password, # Leave blank to be prompted for password
6: $To = $( Throw "You must specify a Jabber ID for the recipient." ),
7: $Body = $( Throw "You must specify a body for the message." )
8: )
9:
10: # This function reads a string from the host while masking with *'s.
11: function Read-HostMasked( [string]$prompt="Password" ) {
12: $password = Read-Host -AsSecureString $prompt;
13: $BSTR = [System.Runtime.InteropServices.marshal]::SecureStringToBSTR($password);
14: $password = [System.Runtime.InteropServices.marshal]::PtrToStringAuto($BSTR);
15: [System.Runtime.InteropServices.Marshal]::ZeroFreeBSTR($BSTR);
16: return $password;
17: }
18: # Set path accordingly.
19: $assemblyPath = $(resolve-path $profiledir\Assemblies\agsXMPP.dll)
20: [void][reflection.assembly]::LoadFrom( $assemblyPath )
21: $jidSender = New-Object agsxmpp.jid( $From )
22: $jidReceiver = New-Object agsxmpp.jid ( $To )
23: $xmppClient = New-Object agsxmpp.XmppClientConnection( $jidSender.Server )
24: $Message = New-Object agsXMPP.protocol.client.Message( $jidReceiver, $Body )
25:
26: # The following switches may assist in troubleshooting connection issues.
27: # If SSL and StartTLS are disabled, then you can use a network sniffer to inspect the XML
28: #$xmppClient.UseSSL = $FALSE
29: #$xmppClient.UseStartTLS = $FALSE
30:
31: # Since this function is only used to send a message, we don't care about doing the
32: # normal discovery and requesting a roster. Leave disabled to quicken the login period.
33: $xmppClient.AutoAgents = $FALSE
34: $xmppClient.AutoRoster = $FALSE
35:
36: # Use SRV lookups to determine correct XMPP server if different from the server
37: # portion of your JID. e.g. user@gmail.com, the server is really talk.google.com
38: $xmppClient.AutoResolveConnectServer = $TRUE
39: if ( !$password ) { $password = Read-HostMasked }
40:
41: # Open connection, then wait for it to be authenticated
42: $xmppClient.Open( $jidSender.User, $Password )
43: while ( !$xmppClient.Authenticated ) {
44: Write-Verbose $xmppClient.XmppConnectionState
45: Start-Sleep 1
46: }
47: # If server disconnects you, try enabling this
48: #$xmppClient.SendMyPresence()
49: $xmppClient.Send( $Message )
50: # Send is asynchronous, so we must wait a second before closing the connection
51: Start-Sleep 1
52: $xmppClient.Close()
53: }
No comments yet.