PowerShell TCP Server

For handling multiple clients you need multiple threads and for that you need to use runspaces. Below is the working code which accepts multiple clients and do the processing of each client in separate thread (runspace)

$Global:Listener = [HashTable]::Synchronized(@{})$Global:CnQueue = [System.Collections.Queue]::Synchronized((New-Object System.collections.queue))$Global:space = [RunSpaceFactory]::CreateRunspace()$space.Open()$space.SessionStateProxy.setVariable("CnQueue", $CnQueue)$space.SessionStateProxy.setVariable("Listener", $Listener)$Global:newPowerShell = [PowerShell]::Create()$newPowerShell.Runspace = $space$Timer = New-Object Timers.Timer$Timer.Enabled = $true$Timer.Interval = 1000Register-ObjectEvent -SourceIdentifier MonitorClientConnection -InputObject $Timer -EventName Elapsed -Action {    While($CnQueue.count -ne 0) {        $client = $CnQueue.Dequeue()        $newRunspace = [RunSpaceFactory]::CreateRunspace()        $newRunspace.Open()        $newRunspace.SessionStateProxy.setVariable("client", $client)        $newPowerShell = [PowerShell]::Create()        $newPowerShell.Runspace = $newRunspace        $process = {            $stream = $client.GetStream();            $reader = New-Object System.IO.StreamReader $stream            [console]::WriteLine("Inside Processing")            # You have client here so do whatever you want to do here.            # This is a separate thread so if you write blocking code here, it will not impact any other part of the program        }        $jobHandle = $newPowerShell.AddScript($process).BeginInvoke()        #jobHandle you need to save for future to cleanup    }}$listener = {    $Listener['listener'] = New-Object System.Net.Sockets.TcpListener("127.0.0.1", "1234")    $Listener['listener'].Start()    [console]::WriteLine("Listening on :1234")    while ($true) {        $c = $Listener['listener'].AcceptTcpClient()        If($c -ne $Null) {            [console]::WriteLine("{0} >> Accepted Client " -f (Get - Date).ToString())            $CnQueue.Enqueue($c)        }        Else {            [console]::WriteLine("Shutting down")            Break        }    }}$Timer.Start()$Global:handle = $newPowerShell.AddScript($listener).BeginInvoke()

For more detailed example please go here