PowerShell

Socket Receive String Until Specific Byte Value is Received

Demonstrates the Chilkat Socket ReceiveStringUntilByte method. PowerShell

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

$success = $false

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

$sock = New-Object Chilkat.Socket

# --------------------------------------------------------------------
# This example uses the public TCP echo service at https://tcpbin.com/
# --------------------------------------------------------------------

$useTls = $false
$port = 4242
$maxWaitMs = 5000
$success = $sock.Connect("tcpbin.com",$port,$useTls,$maxWaitMs)
if ($success -eq $false) {
    $($sock.LastErrorText)
    exit
}

# Wait a max of 2 seconds for a response..
$sock.MaxReadIdleMs = 2000

# Send some strings, each terminated by a 0 byte.
$sock.SendString("This is the 1st string")
$sock.SendByte(0)
$sock.SendString("This is string number 2")
$sock.SendByte(0)

# The tcpbin.com echo server only echoes after receiving an LF (linefeed char)
$sock.SendByte(10)

# Now let's receive what is echoed back....
# Receive each string and the NULL byte.
# The call to ReceiveStringUntilByte will receive incoming data until the lookForByte is encountered.
# The lookForByte is receive and discarded (it is not returned in the string)
$lookForByte = 0
$s1 = $sock.ReceiveStringUntilByte($lookForByte)
if ($sock.LastMethodSuccess -eq $false) {
    $($sock.LastErrorText)
    exit
}

$($s1)

$s2 = $sock.ReceiveStringUntilByte($lookForByte)
if ($sock.LastMethodSuccess -eq $false) {
    $($sock.LastErrorText)
    exit
}

$($s2)

# The echo server will also echo back the final LF
$sock.ReceiveByte($true)
$maxWaitMs = 100
$sock.Close(100)

# Output:
# This is the 1st string
# This is string number 2