拿到eventtcp里

business/jxstore/event/event_tcp.go

@@ -0,0 +1,125 @@
+package event
+
+import (
+	"encoding/json"
+	"fmt"
+	"git.rosy.net.cn/jx-callback/globals"
+	"io"
+	"net"
+	"strconv"
+	"sync"
+)
+
+var (
+	//广播频道(通道)
+	msgChan   = make(chan string)
+	tcpClient = &TcpClient{}
+)
+
+type PrintMsg struct {
+	PrintNo string `json:"print_no"`
+	Data    string `json:"data"`
+}
+
+//连接的客户端,吧每个客户端都放进来
+type TcpClient struct {
+	Clients map[string][]interface{}
+	s       *sync.RWMutex
+}
+
+func Init() {
+	listenTcp()
+	go handleTcpMessages()
+}
+
+func listenTcp() {
+	tcpClient.Clients = make(map[string][]interface{})
+	l, err := net.Listen("tcp", ":8000")
+	if err != nil {
+		fmt.Println("listen error:", err)
+		return
+	}
+	for {
+		c, err := l.Accept()
+		if err != nil {
+			fmt.Println("accept error:", err)
+			break
+		}
+		go handleConn(c)
+	}
+}
+
+func handleConn(c net.Conn) {
+	var (
+		printMsg = &PrintMsg{}
+	)
+	if c == nil {
+		globals.SugarLogger.Debugf("conn is nil")
+		return
+	}
+	defer c.Close()
+	buffer := make([]byte, 1024)
+	for {
+		n, err := c.Read(buffer)
+		if err != nil {
+			if err == io.EOF {
+				fmt.Println("connection close")
+			} else {
+				fmt.Println("ReadString err", err)
+			}
+			return
+		}
+		//能转说明是打印信息，不能转说明是打印机的心跳或者连接
+		if err = json.Unmarshal(buffer[:n], &printMsg); err == nil {
+			//是打印信息就把信息放进chan里，后续根据信息里的printno寻找客户端连接并打印
+			msgChan <- string(buffer[:n])
+		} else {
+			//如果是打印机的心跳或者打印信息返回
+			//tcpClient.Clients[]
+		}
+	}
+}
+
+func handleTcpMessages() {
+	for {
+		//读取通道中的消息
+		//msg := <-msgChan
+	}
+}
+
+func Hextob(str string) []byte {
+	slen := len(str)
+	bHex := make([]byte, len(str)/2)
+	ii := 0
+	for i := 0; i < len(str); i = i + 2 {
+		if slen != 1 {
+			ss := string(str[i]) + string(str[i+1])
+			bt, _ := strconv.ParseInt(ss, 16, 32)
+			bHex[ii] = byte(bt)
+			ii = ii + 1
+			slen = slen - 2
+		}
+	}
+	return bHex
+}
+
+func int2h8l8(i int64) (h, l string) {
+	origin2 := fmt.Sprintf("%b", i)
+	flag := 16 - len(origin2)
+	for i := 0; i < flag; i++ {
+		origin2 = "0" + origin2
+	}
+	begin8 := origin2[:8]
+	end8 := origin2[8:]
+	r1, _ := strconv.ParseInt(begin8, 2, 32)
+	r2, _ := strconv.ParseInt(end8, 2, 32)
+	h = fmt.Sprintf("%x", r1)
+	l = fmt.Sprintf("%x", r2)
+	if len(h) < 2 {
+		h = "0" + h
+	}
+	if len(l) < 2 {
+		l = "0" + l
+	}
+	return h, l
+}