/
client.go
79 lines (71 loc) · 1.5 KB
/
client.go
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package main
import (
"fmt"
"github.com/lvxin0315/go_linux_control/common"
"github.com/nats-io/go-nats"
"github.com/sirupsen/logrus"
"os/exec"
)
var NatsUrl string
var AppSecret string
//func init() {
// flag.StringVar(&natsUrl,
// "natsUrl",
// "192.168.0.209:4222",
// "nats地址")
//
// flag.StringVar(&appSecret,
// "appSecret",
// "appSecret",
// "应用秘钥")
//}
var nc *nats.Conn
func main() {
//开始监听nats
listenNats()
}
func listenNats() {
natsConn, err := nats.Connect(NatsUrl)
if err != nil {
panic(err)
}
nc = natsConn
//监听开始
logrus.Info("nats已经连接")
nc.Subscribe(fmt.Sprintf("app.%s", AppSecret), CmdClientRunner)
select {}
}
func CmdClientRunner(m *nats.Msg) {
if len(m.Data) <= 0 {
logrus.Info("为什么是空的?")
return
}
//执行命令, 并返回内容
logrus.Info("m.Reply:", m.Reply)
err := nc.Publish(m.Reply, exeSysCommand(m.Data))
if err != nil {
logrus.Error("CmdClientRunner nc.Publish: ", err)
}
}
//执行命令生成临时shell文件,再执行shell
func exeSysCommand(cmdStr []byte) []byte {
logrus.Info("cmd:", string(cmdStr))
//生成文件
shellFileName, err := common.SaveShellFile(cmdStr)
//执行后删除文件
defer common.DeleteShellFile(shellFileName)
if err != nil {
logrus.Error(err)
return []byte{}
}
//执行内容
cmd := exec.Command("sh", "-c", shellFileName)
opBytes, err := cmd.Output()
if err != nil {
logrus.Error(err)
return nil
}
//结果
logrus.Info("out:", string(opBytes))
return opBytes
}