feat: replace iot adapter with mqtt command pipeline

backend/iot-server/internal/config/config.go

@@ -0,0 +1,83 @@
+// Package config 加载 IoT Server 的 MQTT、协议密钥和内部接口配置。
+package config
+
+import (
+	"encoding/hex"
+	"fmt"
+	"os"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+type MQTT struct {
+	Broker          string `yaml:"Broker"`
+	ClientID        string `yaml:"ClientID"`
+	Username        string `yaml:"Username"`
+	Password        string `yaml:"Password"`
+	UpTopic         string `yaml:"UpTopic"`
+	DownTopic       string `yaml:"DownTopic"`
+	AckTopic        string `yaml:"AckTopic"`
+	QoS             byte   `yaml:"QoS"`
+	TLS             bool   `yaml:"TLS"`
+	CAFile          string `yaml:"CAFile"`
+	CertificateFile string `yaml:"CertificateFile"`
+	PrivateKeyFile  string `yaml:"PrivateKeyFile"`
+}
+type HTTP struct {
+	Address       string `yaml:"Address"`
+	InternalToken string `yaml:"InternalToken"`
+	CallbackURL   string `yaml:"CallbackURL"`
+}
+type Protocol struct {
+	Key1 string `yaml:"Key1"`
+	Key2 string `yaml:"Key2"`
+	Key3 string `yaml:"Key3"`
+}
+type Config struct {
+	Service  string   `yaml:"Service"`
+	MQTT     MQTT     `yaml:"MQTT"`
+	HTTP     HTTP     `yaml:"HTTP"`
+	Protocol Protocol `yaml:"Protocol"`
+}
+
+func Load(path string) (Config, error) {
+	var cfg Config
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return cfg, err
+	}
+	if err = yaml.Unmarshal(data, &cfg); err != nil {
+		return cfg, err
+	}
+	override(&cfg.MQTT.Password, "HEQI_IOT_MQTT_PASSWORD")
+	override(&cfg.HTTP.InternalToken, "HEQI_IOT_INTERNAL_TOKEN")
+	override(&cfg.Protocol.Key1, "HEQI_IOT_KEY_1")
+	override(&cfg.Protocol.Key2, "HEQI_IOT_KEY_2")
+	override(&cfg.Protocol.Key3, "HEQI_IOT_KEY_3")
+	if cfg.MQTT.Broker == "" || cfg.HTTP.Address == "" || cfg.HTTP.InternalToken == "" {
+		return cfg, fmt.Errorf("MQTT.Broker、HTTP.Address 和 HTTP.InternalToken 必填")
+	}
+	return cfg, nil
+}
+
+func (cfg Config) Keys() (map[byte][]byte, error) {
+	result := map[byte][]byte{}
+	for id, value := range map[byte]string{1: cfg.Protocol.Key1, 2: cfg.Protocol.Key2, 3: cfg.Protocol.Key3} {
+		if strings.TrimSpace(value) == "" {
+			continue
+		}
+		decoded, err := hex.DecodeString(value)
+		if err != nil || len(decoded) != 16 {
+			return nil, fmt.Errorf("Protocol.Key%d 必须是 32 位十六进制 AES-128 密钥", id)
+		}
+		result[id] = decoded
+	}
+	return result, nil
+}
+
+func override(target *string, name string) {
+	if value := os.Getenv(name); value != "" {
+		*target = value
+	}
+}