(JavaScript) Binary.com Tick Stream

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

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

var ws = new CkWebSocket();

// 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.

var rest = new CkRest();

// Connect to ws.binaryws.com
success = rest.Connect("ws.binaryws.com",443,true,false);
ws.UseConnection(rest);
ws.AddClientHeaders();

// My app_id is 12332.  You'll wnat to use your own...
var responseBody = rest.FullRequestNoBody("GET","/websockets/v3?app_id=12332");
success = ws.ValidateServerHandshake();
if (success !== true) {
    console.log(ws.LastErrorText);
    console.log(responseBody);
    console.log(rest.ResponseHeader);
    return;
}

// Build and send the following message:

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

var json = new CkJsonObject();
json.AppendString("ticks","R_50");
json.AppendInt("subscribe",1);

// Send a full message in a single frame
var finalFrame = true;
success = ws.SendFrame(json.Emit(),finalFrame);
if (success !== true) {
    console.log(ws.LastErrorText);
    return;
}

var jsonTickData = new CkJsonObject();
jsonTickData.EmitCompact = false;

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

    success = ws.ReadFrame();
    if (success !== true) {
        console.log("Failed to receive a frame");
        console.log("ReadFrame fail reason = " + ws.ReadFrameFailReason);
        console.log(ws.LastErrorText);
        return;
    }

    // The responses we desire are in Text frames, where the opcode = 1.
    if (ws.FrameOpcodeInt == 1) {
        var receivedJson = ws.GetFrameData();

        jsonTickData.Load(receivedJson);
        console.log(jsonTickData.Emit());

        numTicksReceived = numTicksReceived+1;
    }

}

// Close the websocket connection.
success = ws.SendClose(true,1000,"Closing this websocket.");
if (success !== true) {
    console.log(ws.LastErrorText);
    return;
}

// Read the Close response.
success = ws.ReadFrame();
if (success !== true) {
    console.log("ReadFrame fail reason = " + ws.ReadFrameFailReason);
    console.log(ws.LastErrorText);
    return;
}

console.log("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.