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Send and Receive WebSocket Frame

See more WebSocket Examples

Demonstrates how to send a websocket text frame to a websocket echo server. This example uses Chilkat's websocket test echo server at ws://websockets.chilkat.io/wsChilkatEcho.ashx

Note: The websockets.chilkat.io server imposes the following limitations:
Messages must be 16K or less, and each connection is limited to a max of 16 echoed messages.

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Local $bSuccess = False

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

$oWs = ObjCreate("Chilkat.WebSocket")

; For brevity, this example does not check for errors when etablishing the WebSocket connection.
; See Establish WebSocket Connection for more complete sample code for making the connection.

$oRest = ObjCreate("Chilkat.Rest")
; Connect to websockets.chilkat.io
; IMPORTANT: websockets.chilkat.io accepts frames of up to 16K in size and echoes them back.
; IMPORTANT: The websockets.chilkat.io server imposes the following limitations: 
; ---------- Messages must be 16K or less, and each connection is limited to a max of 16 echoed messages.
$bSuccess = $oRest.Connect("websockets.chilkat.io",80,False,False)
$oWs.UseConnection($oRest)
$oWs.AddClientHeaders()
Local $sResponseBodyIgnored = $oRest.FullRequestNoBody("GET","/wsChilkatEcho.ashx")
$bSuccess = $oWs.ValidateServerHandshake()
If ($bSuccess <> True) Then
    ConsoleWrite($oWs.LastErrorText & @CRLF)
    Exit
EndIf

; This example demonstrates sending a frame and receiving a text frame.

; Send a frame containing the string "Hello World!"
; This will be the first and final frame, and therefore this constitutes the entire message.
Local $bFinalFrame = True
$bSuccess = $oWs.SendFrame("Hello World!",$bFinalFrame)
If ($bSuccess <> True) Then
    ConsoleWrite($oWs.LastErrorText & @CRLF)
    Exit
EndIf

; Read an incoming frame.
$bSuccess = $oWs.ReadFrame()
If ($bSuccess <> True) Then
    ConsoleWrite("Failed to receive a frame" & @CRLF)
    ConsoleWrite("ReadFrame fail reason = " & $oWs.ReadFrameFailReason & @CRLF)
    ConsoleWrite($oWs.LastErrorText & @CRLF)
    Exit
EndIf

; Show the string that was received.
Local $sReceivedStr = $oWs.GetFrameData()
ConsoleWrite("Received: " & $sReceivedStr & @CRLF)

; Close the websocket connection.
$bSuccess = $oWs.SendClose(True,1000,"Closing this websocket.")
If ($bSuccess <> True) Then
    ConsoleWrite($oWs.LastErrorText & @CRLF)
    Exit
EndIf

; Read the Close response.
$bSuccess = $oWs.ReadFrame()
If ($bSuccess <> True) Then
    ConsoleWrite("ReadFrame fail reason = " & $oWs.ReadFrameFailReason & @CRLF)
    ConsoleWrite($oWs.LastErrorText & @CRLF)
    Exit
EndIf

; Should receive the "Close" opcode.
ConsoleWrite("Received opcode: " & $oWs.FrameOpcode & @CRLF)
; Should be the same status code we sent (1000)
ConsoleWrite("Received close status code: " & $oWs.CloseStatusCode & @CRLF)
; The server may echo the close reason.  If not, this will be empty.
ConsoleWrite("Echoed close reason: " & $oWs.CloseReason & @CRLF)

ConsoleWrite("Success." & @CRLF)