Classic ASP
WebSocket Binance Trade Stream (subscribe and receive updates)

Subscribe to a binance trade stream and receive updates.
Chilkat Classic ASP Downloads

Classic ASP
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

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

set ws = Server.CreateObject("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.

set rest = Server.CreateObject("Chilkat.Rest")

' Connect to wss://stream.binance.com:9443
success = rest.Connect("stream.binance.com",9443,1,0)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( rest.LastErrorText) & "</pre>"
    Response.End
End If

success = ws.UseConnection(rest)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( ws.LastErrorText) & "</pre>"
    Response.End
End If

success = ws.AddClientHeaders()

'  Raw streams are accessed at /ws/<streamName>
responseBody = rest.FullRequestNoBody("GET","/ws/btcusdt")
If (rest.LastMethodSuccess = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( rest.LastErrorText) & "</pre>"
    Response.End
End If

success = ws.ValidateServerHandshake()
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ws.LastErrorText) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( responseBody) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( rest.ResponseHeader) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( responseBody) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( rest.ResponseHeader) & "</pre>"

' POST JSON to subscribe to a stream

' {
' "method": "SUBSCRIBE",
' "params":
' [
' "btcusdt@aggTrade",
' "btcusdt@depth"
' ],
' "id": 1
' }

set json = Server.CreateObject("Chilkat.JsonObject")
success = json.UpdateString("method","SUBSCRIBE")
success = json.UpdateString("params[0]","btcusdt@aggTrade")
success = json.UpdateString("params[1]","btcusdt@depth")
success = json.UpdateInt("id",1)

' Send a full message in a single frame
finalFrame = 1
success = ws.SendFrame(json.Emit(),finalFrame)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( ws.LastErrorText) & "</pre>"
    Response.End
End If

set jsonTradeData = Server.CreateObject("Chilkat.JsonObject")
jsonTradeData.EmitCompact = 0

' Begin reading the trade stream response.
' We'll just read the 1st 10 updates and then exit..
receivedFinalFrame = 0
numTradesReceived = 0
Do While numTradesReceived < 5

    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>"
        Response.End
    End If

    ' The responses we desire are in Text frames, where the opcode = 1.
    If (ws.FrameOpcodeInt = 1) Then
        receivedJson = ws.GetFrameData()

        success = jsonTradeData.Load(receivedJson)
        Response.Write "<pre>" & Server.HTMLEncode( jsonTradeData.Emit()) & "</pre>"

        numTradesReceived = numTradesReceived + 1
    End If

Loop

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

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

' The output of the above code is shown here:

%>
</body>
</html>