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Poll a Socket for Available Data

Demonstrates Socket.PollDataAvailable, which performs a nonblocking check for readable activity and returns whether data or another read-ready condition is present.

Background. This lets an application check for incoming data without blocking, for example in an event loop that services multiple tasks.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

$socket = New-Object Chilkat.Socket

#  Connect to the server using TLS.
$bTls = $true
$maxWaitMs = 5000
$success = $socket.Connect("example.com",5000,$bTls,$maxWaitMs)
if ($success -eq $false) {
    $($socket.LastErrorText)
    exit
}

#  Perform a nonblocking check for readable data.  Returns $true when data or another read-ready
#  condition is present, and $false when nothing is immediately available.
$bAvailable = $socket.PollDataAvailable()
if ($bAvailable -ne $true) {
    $("No data is immediately available.")
}
else {
    $("Data is available to read.")
}