Zig

Binary.com Tick Stream

See more WebSocket Examples

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

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

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

    const ws = try chilkat.WebSocket.init();
    defer ws.deinit();

    // 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.

    const rest = try chilkat.Rest.init();
    defer rest.deinit();

    // Connect to ws.binaryws.com
    try rest.connect("ws.binaryws.com", 443, true, false);
    ws.useConnection(rest) catch {};
    ws.addClientHeaders() catch {};

    // My app_id is 12332.  You'll wnat to use your own...
    const response_body = try rest.fullRequestNoBody(alloc, "GET", "/websockets/v3?app_id=12332");
    ws.validateServerHandshake() catch {
        std.debug.print("{s}\n", .{try ws.getLastErrorText(alloc)});
        std.debug.print("{s}\n", .{response_body});
        std.debug.print("{s}\n", .{try rest.getResponseHeader(alloc)});
        return;
    };

    // Build and send the following message:

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

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.appendString("ticks", "R_50") catch {};
    json.appendInt("subscribe", 1) catch {};

    // Send a full message in a single frame
    const final_frame = true;
    ws.sendFrame(try json.emit(alloc), final_frame) catch {
        std.debug.print("{s}\n", .{try ws.getLastErrorText(alloc)});
        return;
    };

    const json_tick_data = try chilkat.JsonObject.init();
    defer json_tick_data.deinit();
    json_tick_data.setEmitCompact(false);

    // Begin reading the tick stream response.
    // We'll just read the 1st 10 updates and then exit..
    var num_ticks_received: i32 = 0;
    while (num_ticks_received < 5) {
        ws.readFrame() catch {
            std.debug.print("Failed to receive a frame\n", .{});
            std.debug.print("ReadFrame fail reason = {d}\n", .{ws.getReadFrameFailReason()});
            std.debug.print("{s}\n", .{try ws.getLastErrorText(alloc)});
            return;
        };

        // The responses we desire are in Text frames, where the opcode = 1.
        if (ws.getFrameOpcodeInt() == 1) {
            const received_json = try ws.getFrameData(alloc);

            json_tick_data.load(received_json) catch {};
            std.debug.print("{s}\n", .{try json_tick_data.emit(alloc)});

            num_ticks_received = num_ticks_received + 1;
        }
    }

    // Close the websocket connection.
    ws.sendClose(true, 1000, "Closing this websocket.") catch {
        std.debug.print("{s}\n", .{try ws.getLastErrorText(alloc)});
        return;
    };

    // Read the Close response.
    ws.readFrame() catch {
        std.debug.print("ReadFrame fail reason = {d}\n", .{ws.getReadFrameFailReason()});
        std.debug.print("{s}\n", .{try ws.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Success.\n", .{});

    // 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.
}