尝试打印数据

controllers/api_controller.go

@@ -1,14 +1,18 @@
 package controllers
 
 import (
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"git.rosy.net.cn/baseapi/utils"
 	"git.rosy.net.cn/jx-callback/business/model"
 	"git.rosy.net.cn/jx-callback/globals"
 	"github.com/astaxie/beego/server/web"
+	"net"
 	"net/url"
+	"os"
 	"reflect"
+	"strconv"
 )
 
 type ApiController struct {
@@ -24,6 +28,7 @@ const (
 
 var (
 	routerMap map[string]reflect.Value
+	textChan  chan string
 )
 
 func Init() {
@@ -148,3 +153,64 @@ func (c *ApiController) AddPrint(dataMap map[string]interface{}) (data string, e
 	data2, err := json.Marshal(dataMap)
 	return string(data2), err
 }
+
+func (c *ApiController) DoPrint(dataMap map[string]interface{}) (data string, err error) {
+	data = dataMap["data"].(string)
+	server := "print.jxcs.net:8000"
+	tcpAddr, err := net.ResolveTCPAddr("tcp4", server)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Fatal error: %s", err.Error())
+		os.Exit(1)
+	}
+	conn, err := net.DialTCP("tcp", nil, tcpAddr)
+	if err != nil {
+		return
+	}
+	textChan = make(chan string, 10)
+	textChan <- data
+	connHandler(conn)
+	return data, err
+}
+
+func connHandler(c net.Conn) {
+	str := "1e"
+	const1 := "0200ff50"
+	orderNo := "0001"     //订单序列号
+	printInit := "1b40"   //打印机初始化
+	voice := "1b59415501" //语音响一次
+	check := "ff"
+	go func() {
+		s := <-textChan
+		//写入数据
+		printData := hex.EncodeToString([]byte(s))
+		lenData := int64(len(str) + len(const1) + len(orderNo) + len(printInit) + len(voice) + 1 + 2 + len(printData))
+		x1, x2 := int2h8l8(lenData)
+		data := const1 + x1 + x2 + orderNo + printInit + voice + printData + check
+		n, err := c.Write([]byte(data))
+		if err != nil {
+			fmt.Println("Write err:", err, n)
+			return
+		}
+	}()
+}
+
+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
+}