feat(mqtt): 实现MQTT客户端，支持系统资源监控和关机控制

添加新的MQTT客户端实现，具有系统资源使用情况监测和远程关机功能。客户端通过MQTT协议与服务器交换信息，订阅特定主题以接收控制命令，并发布系统资源使用情况。此功能允许在远程系统上执行关机操作，并监测CPU及内存使用情况。

- 实现PCInfo结构体以存储系统资源使用信息。
- 实现Command结构体以解析接收到的控制命令。
- 编写onMessageReceived处理函数以响应接收到的消息。
- 实现executeShutdown函数以处理不同操作系统的关机逻辑。
- 主函数中初始化MQTT客户端，加载环境变量，订阅主题，并循环发布系统资源信息。

.env

@@ -0,0 +1,3 @@
+MQTT_BROKER=tcp://127.0.0.1:1883
+MQTT_CLIENT_ID=local
+MQTT_TOPIC=pc/0

.idea/.gitignore

@@ -0,0 +1,8 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/pc_mqtt.iml" filepath="$PROJECT_DIR$/pc_mqtt.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

app/pc_mqtt/.env

@@ -0,0 +1,3 @@
+MQTT_BROKER=tcp://127.0.0.1:1883
+MQTT_CLIENT_ID=local
+MQTT_TOPIC=pc/0

app/pc_mqtt/install.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# 确保脚本以root权限运行
+if [ "$(id -u)" -ne "0" ]; then
+  echo "This script must be run as root." 1>&2
+  exit 1
+fi
+
+# 设置变量
+SERVICE_FILE="/etc/systemd/system/mqtt-info-tool.service"
+BINARY_FILE="/opt/app/pc_mqtt/client"
+
+# 确保Go程序可执行
+chmod +x $BINARY_FILE
+
+# 安装systemd服务文件
+echo "Copying systemd service file to /etc/systemd/system..."
+cp ./mqtt-info-tool.service $SERVICE_FILE
+
+# 重新加载systemd配置
+echo "Reloading systemd daemon..."
+systemctl daemon-reload
+
+# 启动服务并设置为开机自启
+echo "Starting MQTT Info Tool service..."
+systemctl start mqtt-info-tool
+systemctl enable mqtt-info-tool
+
+# 打印服务状态
+echo "Service status:"
+systemctl status mqtt-info-tool
+
+echo "Installation completed successfully."

app/pc_mqtt/mqtt-info-tool.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=MQTT PC Information Tool
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/opt/app/pc_mqtt/client
+WorkingDirectory=/opt/app/pc_mqtt
+EnvironmentFile=/opt/app/pc_mqtt/.env
+Restart=always
+User=root
+Group=root
+
+[Install]
+WantedBy=multi-user.target
+

client.go

@@ -0,0 +1,132 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"os/exec"
+	"runtime"
+	"time"
+
+	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"github.com/joho/godotenv"
+	"github.com/shirou/gopsutil/cpu"
+	"github.com/shirou/gopsutil/mem"
+)
+
+// PCInfo 定义 PC 使用信息的结构。
+type PCInfo struct {
+	CPUUsage float64 `json:"cpu_usage"` // CPU
+	MemUsage float64 `json:"mem_usage"` // Memory
+}
+
+// Command 定义接收命令的结构。
+type Command struct {
+	Action string `json:"action"` // Action 待执行
+}
+
+// loadEnv 加载 .env 文件以读取环境变量。
+func loadEnv() {
+	err := godotenv.Load(".env")
+	if err != nil {
+		fmt.Println("Error loading .env file")
+	}
+}
+
+// getPCInfo 检索当前 PC 使用信息。
+func getPCInfo() (PCInfo, error) {
+	cpuPercentages, err := cpu.Percent(0, false)
+	if err != nil {
+		return PCInfo{}, err
+	}
+
+	memInfo, err := mem.VirtualMemory()
+	if err != nil {
+		return PCInfo{}, err
+	}
+
+	// 保留2位小数
+	return PCInfo{
+		CPUUsage: float64(int(cpuPercentages[0]*100)) / 100,
+		MemUsage: float64(int(memInfo.UsedPercent*100)) / 100,
+	}, nil
+}
+
+// onMessageReceived 处理从 MQTT 接收的消息。
+func onMessageReceived(client mqtt.Client, msg mqtt.Message) {
+	var cmd Command
+	err := json.Unmarshal(msg.Payload(), &cmd)
+	if err != nil {
+		fmt.Println("Error decoding JSON command:", err)
+		return
+	}
+
+	if cmd.Action == "shutdown" {
+		fmt.Println("Shutdown command received. Shutting down...")
+		executeShutdown()
+	}
+}
+
+// executeShutdown 根据操作系统执行关机命令。
+func executeShutdown() {
+	var cmd *exec.Cmd
+	switch runtime.GOOS {
+	case "windows":
+		cmd = exec.Command("shutdown", "/s", "/t", "0")
+	case "linux", "darwin":
+		cmd = exec.Command("shutdown", "-h", "now")
+	default:
+		fmt.Println("Shutdown not supported on this OS")
+		return
+	}
+	err := cmd.Run()
+	if err != nil {
+		fmt.Println("Failed to execute shutdown:", err)
+	}
+}
+
+func main() {
+	loadEnv()
+
+	broker := os.Getenv("MQTT_BROKER")
+	clientID := os.Getenv("MQTT_CLIENT_ID")
+	topic := os.Getenv("MQTT_TOPIC")
+
+	opts := mqtt.NewClientOptions()
+	opts.AddBroker(broker)
+	opts.SetClientID(clientID)
+	opts.SetDefaultPublishHandler(onMessageReceived)
+
+	client := mqtt.NewClient(opts)
+	if token := client.Connect(); token.Wait() && token.Error() != nil {
+		fmt.Println(token.Error())
+		return
+	}
+
+	// 订阅主题以接收命令
+	client.Subscribe(topic, 0, nil)
+
+	for {
+		pcInfo, err := getPCInfo()
+		if err != nil {
+			fmt.Println("Error getting PC info:", err)
+			continue
+		}
+
+		pcInfoJSON, err := json.Marshal(pcInfo)
+		if err != nil {
+			fmt.Println("Error encoding PC info to JSON:", err)
+			continue
+		}
+
+		token := client.Publish(topic, 0, false, pcInfoJSON)
+		token.Wait()
+
+		fmt.Println("Message published:", string(pcInfoJSON))
+
+		time.Sleep(10 * time.Second) // 控制发送频率，例如每10秒发送一次
+	}
+
+	// 完成后断开 MQTT 客户端连接
+	// client.Disconnect(250)
+}

go.mod

@@ -0,0 +1,21 @@
+module pc_mqtt
+
+go 1.23.0
+
+require (
+	github.com/eclipse/paho.mqtt.golang v1.5.0
+	github.com/joho/godotenv v1.5.1
+	github.com/shirou/gopsutil v3.21.11+incompatible
+)
+
+require (
+	github.com/go-ole/go-ole v1.2.6 // indirect
+	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/stretchr/testify v1.9.0 // indirect
+	github.com/tklauser/go-sysconf v0.3.14 // indirect
+	github.com/tklauser/numcpus v0.8.0 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	golang.org/x/net v0.27.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+)

go.sum

@@ -0,0 +1,31 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/eclipse/paho.mqtt.golang v1.5.0 h1:EH+bUVJNgttidWFkLLVKaQPGmkTUfQQqjOsyvMGvD6o=
+github.com/eclipse/paho.mqtt.golang v1.5.0/go.mod h1:du/2qNQVqJf/Sqs4MEL77kR8QTqANF7XU7Fk0aOTAgk=
+github.com/go-ole/go-ole v1.2.6 h1:/Fpf6oFPoeFik9ty7siob0G6Ke8QvQEuVcuChpwXzpY=
+github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/shirou/gopsutil v3.21.11+incompatible h1:+1+c1VGhc88SSonWP6foOcLhvnKlUeu/erjjvaPEYiI=
+github.com/shirou/gopsutil v3.21.11+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/tklauser/go-sysconf v0.3.14 h1:g5vzr9iPFFz24v2KZXs/pvpvh8/V9Fw6vQK5ZZb78yU=
+github.com/tklauser/go-sysconf v0.3.14/go.mod h1:1ym4lWMLUOhuBOPGtRcJm7tEGX4SCYNEEEtghGG/8uY=
+github.com/tklauser/numcpus v0.8.0 h1:Mx4Wwe/FjZLeQsK/6kt2EOepwwSl7SmJrK5bV/dXYgY=
+github.com/tklauser/numcpus v0.8.0/go.mod h1:ZJZlAY+dmR4eut8epnzf0u/VwodKmryxR8txiloSqBE=
+github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
+github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
+golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
+golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pc_mqtt.iml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>