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(PowerShell) WebSocket Connect

Demonstrates how to establish a WebSocket connection. Once the connection is established, messages may be sent back-and-forth. Messages are sent in frames, where the last frame in the message is indicated by a "final" bit. A frame constitutes the entire message if the first frame sent has the "final" bit sent. (In most cases, you'll probably be sending single-frame messages.)

Chilkat .NET Downloads

Chilkat .NET Assemblies

Chilkat for Mono

[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet2.dll")

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

#  --------------------------------------------------
#  A WebSocket connection begins life as an HTTP GET request containing a few special header fields,
#  such as "Upgrade: websocket".

#  Your application will use the Chilkat Rest class to send the initial HTTP GET.  This allows you
#  to use the full capability of the Chilkat Rest class to customize the GET for any particular situation.
#  For example:
# 
#    - If custom HTTP request header fields must be added.
#    - If authentication is required, such as OAuth2, OAuth1, Basic HTTP Auth, etc.
#    - If HTTPS, SSH Tunneling, Proxies (HTTP or SOCKS), or other advanced connection or TLS features are required.
# 

$rest = New-Object Chilkat.Rest
$success = $rest.Connect("someserver.com",80,$false,$false)
if ($success -ne $true) {
    $($rest.LastErrorText)
    exit
}

$ws = New-Object Chilkat.WebSocket

#  Tell the WebSocket to use this connection.
$success = $ws.UseConnection($rest)
if ($success -ne $true) {
    $($ws.LastErrorText)
    exit
}

#  Add the standard WebSocket open handshake headers that will be needed.
#  (This adds the required HTTP request headers to the rest object.)
$ws.AddClientHeaders()

#  Add any additional headers that might be desired.
#  Two common WebSocketSpecific headers are "Sec-WebSocket-Protocol" and "Origin".
$rest.AddHeader("Sec-WebSocket-Protocol","x-something")
$rest.AddHeader("Origin","http://someserver.com")

#  Do the open handshake.
$responseBody = $rest.FullRequestNoBody("GET","/something")
if ($rest.LastMethodSuccess -ne $true) {
    $($rest.LastErrorText)
    exit
}

#  If successful, the HTTP response status code should be 101,
#  and the response body will be empty. (If it failed, we'll have a look
#  at the response body..)
$statusCode = $rest.ResponseStatusCode
$("Response status code: " + $statusCode)

if ($statusCode -ne 101) {
    $($responseBody)
    $("-- Failed because of unexpected response status code.")
    exit
}

#  We have the expected 101 response, so let's now validate the
#  contents of the response, such as the value sent by the server in the
#  Sec-WebSocket-Accept header.
$success = $ws.ValidateServerHandshake()
if ($success -ne $true) {
    $($ws.LastErrorText)
    exit
}

$("WebSocket connection successful.")

#  The application may now begin sending and receiving frames on the WebSocket connection.
#  (At this point, we're done with the rest object...)

 

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