javascript
    
    
function main() {
    let httpServer = threading.Serve("http://:8088?gzip=true", function (ctx) {
        Log("http connect from: ", ctx.remoteAddr(), "->", ctx.localAddr())
        let path = ctx.path()
        if (path == "/") {
            ctx.write(JSON.stringify({
                path: ctx.path(),
                method: ctx.method(),
                headers: ctx.headers(),
                cookie: ctx.header("Cookie"),
                remote: ctx.remoteAddr(),
                query: ctx.rawQuery()
            }))
        } else if (path == "/tickers") {
            let ret = exchange.GetTickers()
            if (!ret) {
                ctx.setStatus(500)
                ctx.write(GetLastError())
            } else {
                ctx.write(JSON.stringify(ret))
            }
        } else if (path == "/wss") {
            if (ctx.upgrade("websocket")) { // upgrade to websocket
                while (true) {
                    let r = ctx.read(10)
                    if (r == "") {
                        break
                    } else if (r) {
                        if (r == "ticker") {
                            ctx.write(JSON.stringify(exchange.GetTicker()))
                        } else {
                            ctx.write("not support")
                        }
                    }
                }
                Log("websocket closed", ctx.remoteAddr())
            }
        } else {
            ctx.setStatus(404)
        }
    })
    let echoServer = threading.Serve("tcp://:8089", function (ctx) {
        Log("tcp connect from: ", ctx.remoteAddr(), "->", ctx.localAddr())
        while (true) {
            let d = ctx.read()
            if (!d) {
                break
            }
            ctx.write(d)
        }
        Log("connect closed")
    })
    Log("http serve on", httpServer.addr(), "tcp serve on", echoServer.addr())

    for (var i = 0; i < 5; i++) {
        if (i == 2) {
            // test Http
            var retHttp = HttpQuery("http://127.0.0.1:8088?num=123&limit=100", {"debug": true})
            Log("retHttp:", retHttp)
        } else if (i == 3) {
            // test TCP
            var tcpConn = Dial("tcp://127.0.0.1:8089")
            tcpConn.write("Hello TCP Server")
            var retTCP = tcpConn.read()
            Log("retTCP:", retTCP)
        } else if (i == 4) {
            // test Websocket
            var wsConn = Dial("ws://127.0.0.1:8088/wss|compress=gzip")
            wsConn.write("ticker")
            var retWS = wsConn.read(1000)
            Log("retWS:", retWS)
            // no depth
            wsConn.write("depth")
            retWS = wsConn.read(1000)
            Log("retWS:", retWS)
        }
        Sleep(1000)
    }
    httpServer.close()
    echoServer.close()
}