Swift

Binary.com Tick Stream

See more WebSocket Examples

Tick Stream Request -- Initiate a continuous stream of spot price updates for a given symbol. Swift

func chilkatTest() {
    var success: Bool = false

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

    let ws = CkoWebSocket()!

    // 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.

    let rest = CkoRest()!

    // Connect to ws.binaryws.com
    success = rest.connect(hostname: "ws.binaryws.com", port: 443, tls: true, autoReconnect: false)
    ws.useConnection(connection: rest)
    ws.addClientHeaders()

    // My app_id is 12332.  You'll wnat to use your own...
    var responseBody: String? = rest.fullRequestNoBody(httpVerb: "GET", uriPath: "/websockets/v3?app_id=12332")
    success = ws.validateServerHandshake()
    if success != true {
        print("\(ws.lastErrorText!)")
        print("\(responseBody!)")
        print("\(rest.responseHeader!)")
        return
    }

    // Build and send the following message:

    // {
    //   "ticks": "R_50",
    //   "subscribe": 1
    // }

    let json = CkoJsonObject()!
    json.appendString(name: "ticks", value: "R_50")
    json.appendInt(name: "subscribe", value: 1)

    // Send a full message in a single frame
    var finalFrame: Bool = true
    success = ws.sendFrame(stringToSend: json.emit(), finalFrame: finalFrame)
    if success != true {
        print("\(ws.lastErrorText!)")
        return
    }

    let jsonTickData = CkoJsonObject()!
    jsonTickData.emitCompact = false

    // Begin reading the tick stream response.
    // We'll just read the 1st 10 updates and then exit..
    var receivedFinalFrame: Bool = false
    var numTicksReceived: Int = 0
    while numTicksReceived < 5 {

        success = ws.readFrame()
        if success != true {
            print("Failed to receive a frame")
            print("ReadFrame fail reason = \(ws.readFrameFailReason.intValue)")
            print("\(ws.lastErrorText!)")
            return
        }

        // The responses we desire are in Text frames, where the opcode = 1.
        if ws.frameOpcodeInt.intValue == 1 {
            var receivedJson: String? = ws.getFrameData()

            jsonTickData.load(json: receivedJson)
            print("\(jsonTickData.emit()!)")

            numTicksReceived = numTicksReceived + 1
        }

    }

    // Close the websocket connection.
    success = ws.sendClose(includeStatus: true, statusCode: 1000, reason: "Closing this websocket.")
    if success != true {
        print("\(ws.lastErrorText!)")
        return
    }

    // Read the Close response.
    success = ws.readFrame()
    if success != true {
        print("ReadFrame fail reason = \(ws.readFrameFailReason.intValue)")
        print("\(ws.lastErrorText!)")
        return
    }

    print("Success.")

    // The output of the above code is shown here:

    // {
    //   "echo_req": {
    //     "subscribe": 1,
    //     "ticks": "R_50"
    //   },
    //   "msg_type": "tick",
    //   "tick": {
    //     "ask": "373.8725",
    //     "bid": "373.8325",
    //     "epoch": "1517437456",
    //     "id": "2d3dedf1-45e2-66a5-d0d3-72bd7f0a6ea9",
    //     "quote": "373.8525",
    //     "symbol": "R_50"
    //   }
    // }
    // 
    // {
    //   "echo_req": {
    //     "subscribe": 1,
    //     "ticks": "R_50"
    //   },
    //   "msg_type": "tick",
    //   "tick": {
    //     "ask": "373.7952",
    //     "bid": "373.7552",
    //     "epoch": "1517437458",
    //     "id": "2d3dedf1-45e2-66a5-d0d3-72bd7f0a6ea9",
    //     "quote": "373.7752",
    //     "symbol": "R_50"
    //   }
    // }
    // 
    // {
    //   "echo_req": {
    //     "subscribe": 1,
    //     "ticks": "R_50"
    //   },
    //   "msg_type": "tick",
    //   "tick": {
    //     "ask": "373.8638",
    //     "bid": "373.8238",
    //     "epoch": "1517437460",
    //     "id": "2d3dedf1-45e2-66a5-d0d3-72bd7f0a6ea9",
    //     "quote": "373.8438",
    //     "symbol": "R_50"
    //   }
    // }
    // 
    // {
    //   "echo_req": {
    //     "subscribe": 1,
    //     "ticks": "R_50"
    //   },
    //   "msg_type": "tick",
    //   "tick": {
    //     "ask": "373.7636",
    //     "bid": "373.7236",
    //     "epoch": "1517437462",
    //     "id": "2d3dedf1-45e2-66a5-d0d3-72bd7f0a6ea9",
    //     "quote": "373.7436",
    //     "symbol": "R_50"
    //   }
    // }
    // 
    // {
    //   "echo_req": {
    //     "subscribe": 1,
    //     "ticks": "R_50"
    //   },
    //   "msg_type": "tick",
    //   "tick": {
    //     "ask": "373.6870",
    //     "bid": "373.6470",
    //     "epoch": "1517437464",
    //     "id": "2d3dedf1-45e2-66a5-d0d3-72bd7f0a6ea9",
    //     "quote": "373.6670",
    //     "symbol": "R_50"
    //   }
    // }
    // 
    // Success.

}