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Classic ASP Examples


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(Classic ASP) Send and Receive WebSocket Frame

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

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

set ws = Server.CreateObject("Chilkat_9_5_0.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.

set rest = Server.CreateObject("Chilkat_9_5_0.Rest")
'  Connect to websockets.chilkat.io
'  (websockets.chilkat.io accepts frames of up to 16K in size and echoes them back)
success = rest.Connect("websockets.chilkat.io",80,0,0)
success = ws.UseConnection(rest)
success = ws.AddClientHeaders()
responseBodyIgnored = rest.FullRequestNoBody("GET","/wsChilkatEcho.ashx")
success = ws.ValidateServerHandshake()
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ws.LastErrorText) & "</pre>"

End If

'  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.
finalFrame = 1
success = ws.SendFrame("Hello World!",finalFrame)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ws.LastErrorText) & "</pre>"

End If

'  Read an incoming frame.
success = ws.ReadFrame()
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Failed to receive a frame") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "ReadFrame fail reason = " & ws.ReadFrameFailReason) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( ws.LastErrorText) & "</pre>"

End If

'  Show the string that was received.
receivedStr = ws.GetFrameData()
Response.Write "<pre>" & Server.HTMLEncode( "Received: " & receivedStr) & "</pre>"

'  Close the websocket connection.
success = ws.SendClose(1,1000,"Closing this websocket.")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ws.LastErrorText) & "</pre>"

End If

'  Read the Close response.
success = ws.ReadFrame()
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "ReadFrame fail reason = " & ws.ReadFrameFailReason) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( ws.LastErrorText) & "</pre>"

End If

'  Should receive the "Close" opcode.
Response.Write "<pre>" & Server.HTMLEncode( "Received opcode: " & ws.FrameOpcode) & "</pre>"
'  Should be the same status code we sent (1000)
Response.Write "<pre>" & Server.HTMLEncode( "Received close status code: " & ws.CloseStatusCode) & "</pre>"
'  The server may echo the close reason.  If not, this will be empty.
Response.Write "<pre>" & Server.HTMLEncode( "Echoed close reason: " & ws.CloseReason) & "</pre>"

Response.Write "<pre>" & Server.HTMLEncode( "Success.") & "</pre>"

%>
</body>
</html>

 

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