Go

Duplicate Python websockets

See more WebSocket Examples

Demonstrates how to duplicate the following Python client-side websocket snippet:

async with websockets.connect('ws://192.168.1.35/websocket') as websocket:
await websocket.send("http.controller_login:username=xxx&password=xxxxx")
response = await websocket.recv()

Go

    success := false

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

    // In Python, the following line of code does more than just connect:
    // 
    //      websockets.connect('ws://192.168.1.35/websocket')
    // 
    // It is connecting to 192.168.1.35 without using TLS.  If the URI starts with "wss://", then TLS should be used.
    // But this URI begins with just "ws:/", so no TLS.

    // Also, after connecting, a GET request is sent to the /websocket endpoint.
    // In summary, the websockets.connect function is establishing the connection and it sends a GET request.

    // First establish the connection.
    // No TLS, use the default HTTP port 80.
    rest := chilkat.NewRest()
    success = rest.Connect("192.168.1.35",80,false,false)
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        return
    }

    ws := chilkat.NewWebSocket()

    // Tell the WebSocket to use this connection.
    success = ws.UseConnection(rest)
    if success != true {
        fmt.Println(ws.LastErrorText())
        rest.DisposeRest()
        ws.DisposeWebSocket()
        return
    }

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

    // Now send the GET request to /websockets.
    responseBody := rest.FullRequestNoBody("GET","/websockets")
    if rest.LastMethodSuccess() != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        ws.DisposeWebSocket()
        return
    }

    // 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()
    fmt.Println("Response status code: ", statusCode)

    if statusCode != 101 {
        fmt.Println(*responseBody)
        fmt.Println("-- Failed because of unexpected response status code.")
        rest.DisposeRest()
        ws.DisposeWebSocket()
        return
    }

    // We have the expected 101 response, so let's now validate the 
    // contents of the response.
    success = ws.ValidateServerHandshake()
    if success != true {
        fmt.Println(ws.LastErrorText())
        rest.DisposeRest()
        ws.DisposeWebSocket()
        return
    }

    fmt.Println("WebSocket connection successful.")

    // The application may now begin sending and receiving frames on the WebSocket connection.

    // The 1st frame sent by the Python snippet is:
    // 
    //     websocket.send("http.controller_login:username=xxx&password=xxxxx")
    // 

    // Send the same using Chilkat, and get the response.
    finalFrame := true
    success = ws.SendFrame("http.controller_login:username=xxx&password=xxxxx",finalFrame)
    if success != true {
        fmt.Println(ws.LastErrorText())
        rest.DisposeRest()
        ws.DisposeWebSocket()
        return
    }

    // Read an incoming frame.
    success = ws.ReadFrame()
    if success != true {
        fmt.Println("Failed to receive a frame")
        fmt.Println("ReadFrame fail reason = ", ws.ReadFrameFailReason())
        fmt.Println(ws.LastErrorText())
        rest.DisposeRest()
        ws.DisposeWebSocket()
        return
    }

    // Show the string that was received.
    receivedStr := ws.GetFrameData()
    fmt.Println("Received: ", *receivedStr)

    // Continue with whatever additional communications are desired...
    // ....
    // 

    rest.DisposeRest()
    ws.DisposeWebSocket()