修复图表时间和查询区间不匹配问题

backend/config/config.go

@@ -0,0 +1,239 @@
+package config
+
+import (
+	"encoding/json"
+	"os"
+	"strconv"
+)
+
+type Config struct {
+	Server struct {
+		Port int `json:"port"`
+	} `json:"server"`
+	InfluxDB struct {
+		URL      string `json:"url"`
+		Token    string `json:"token"`
+		Org      string `json:"org"`
+		Bucket   string `json:"bucket"`
+		Username string `json:"username"`
+		Password string `json:"password"`
+	} `json:"influxdb"`
+	DB struct {
+		Type     string `json:"type"`
+		Host     string `json:"host"`
+		Port     int    `json:"port"`
+		Username string `json:"username"`
+		Password string `json:"password"`
+		Database string `json:"database"`
+		SSLMode  string `json:"ssl_mode"`
+		Charset  string `json:"charset"`
+	} `json:"db"`
+}
+
+func LoadConfig() (*Config, error) {
+	// 创建默认配置
+	cfg := &Config{}
+
+	// 设置默认值
+	cfg.Server.Port = 8080
+	cfg.InfluxDB.URL = "http://localhost:8086"
+	cfg.InfluxDB.Token = ""
+	cfg.InfluxDB.Org = "monitor"
+	cfg.InfluxDB.Bucket = "monitor"
+	cfg.InfluxDB.Username = ""
+	cfg.InfluxDB.Password = ""
+
+	// 数据库默认配置（只支持MySQL）
+	cfg.DB.Type = "mysql"
+	cfg.DB.Host = "localhost"
+	cfg.DB.Port = 3306
+	cfg.DB.Username = "root"
+	cfg.DB.Password = ""
+	cfg.DB.Database = "monitor"
+	cfg.DB.SSLMode = "disable"
+	cfg.DB.Charset = "utf8mb4"
+
+	// 从配置文件读取配置
+	readConfigFile(cfg)
+
+	// 从环境变量读取配置（优先级高于配置文件）
+	loadFromEnv(cfg)
+
+	return cfg, nil
+}
+
+// 从配置文件读取配置
+func readConfigFile(cfg *Config) {
+	// 获取配置文件路径，默认./config.json，可通过环境变量指定
+	configFile := os.Getenv("SERVER_CONFIG_FILE")
+	if configFile == "" {
+		configFile = "./config.json"
+	}
+
+	// 检查配置文件是否存在
+	if _, err := os.Stat(configFile); os.IsNotExist(err) {
+		return
+	}
+
+	// 读取配置文件
+	content, err := os.ReadFile(configFile)
+	if err != nil {
+		return
+	}
+
+	// 解析配置文件
+	var fileConfig Config
+	if err := json.Unmarshal(content, &fileConfig); err != nil {
+		return
+	}
+
+	// 合并配置：只覆盖非零值
+	if fileConfig.Server.Port != 0 {
+		cfg.Server.Port = fileConfig.Server.Port
+	}
+
+	if fileConfig.InfluxDB.URL != "" {
+		cfg.InfluxDB.URL = fileConfig.InfluxDB.URL
+	}
+
+	if fileConfig.InfluxDB.Token != "" {
+		cfg.InfluxDB.Token = fileConfig.InfluxDB.Token
+	}
+
+	if fileConfig.InfluxDB.Org != "" {
+		cfg.InfluxDB.Org = fileConfig.InfluxDB.Org
+	}
+
+	if fileConfig.InfluxDB.Bucket != "" {
+		cfg.InfluxDB.Bucket = fileConfig.InfluxDB.Bucket
+	}
+
+	if fileConfig.InfluxDB.Username != "" {
+		cfg.InfluxDB.Username = fileConfig.InfluxDB.Username
+	}
+
+	if fileConfig.InfluxDB.Password != "" {
+		cfg.InfluxDB.Password = fileConfig.InfluxDB.Password
+	}
+
+	// 合并数据库配置
+	if fileConfig.DB.Type != "" {
+		cfg.DB.Type = fileConfig.DB.Type
+	}
+
+	if fileConfig.DB.Host != "" {
+		cfg.DB.Host = fileConfig.DB.Host
+	}
+
+	if fileConfig.DB.Port != 0 {
+		cfg.DB.Port = fileConfig.DB.Port
+	}
+
+	if fileConfig.DB.Username != "" {
+		cfg.DB.Username = fileConfig.DB.Username
+	}
+
+	if fileConfig.DB.Password != "" {
+		cfg.DB.Password = fileConfig.DB.Password
+	}
+
+	if fileConfig.DB.Database != "" {
+		cfg.DB.Database = fileConfig.DB.Database
+	}
+
+	if fileConfig.DB.SSLMode != "" {
+		cfg.DB.SSLMode = fileConfig.DB.SSLMode
+	}
+
+	if fileConfig.DB.Charset != "" {
+		cfg.DB.Charset = fileConfig.DB.Charset
+	}
+}
+
+// SaveConfig 保存配置到文件
+func SaveConfig(cfg *Config) error {
+	// 获取配置文件路径，默认./config.json，可通过环境变量指定
+	configFile := os.Getenv("SERVER_CONFIG_FILE")
+	if configFile == "" {
+		configFile = "./config.json"
+	}
+
+	// 将配置转换为JSON
+	jsonData, err := json.MarshalIndent(cfg, "", "  ")
+	if err != nil {
+		return err
+	}
+
+	// 写入配置文件
+	return os.WriteFile(configFile, jsonData, 0644)
+}
+
+// 从环境变量读取配置
+func loadFromEnv(cfg *Config) {
+	// Server config
+	if portStr := os.Getenv("SERVER_PORT"); portStr != "" {
+		if port, err := strconv.Atoi(portStr); err == nil {
+			cfg.Server.Port = port
+		}
+	}
+
+	// InfluxDB config
+	if url := os.Getenv("INFLUXDB_URL"); url != "" {
+		cfg.InfluxDB.URL = url
+	}
+
+	if token := os.Getenv("INFLUXDB_TOKEN"); token != "" {
+		cfg.InfluxDB.Token = token
+	}
+
+	if org := os.Getenv("INFLUXDB_ORG"); org != "" {
+		cfg.InfluxDB.Org = org
+	}
+
+	if bucket := os.Getenv("INFLUXDB_BUCKET"); bucket != "" {
+		cfg.InfluxDB.Bucket = bucket
+	}
+
+	if username := os.Getenv("INFLUXDB_USERNAME"); username != "" {
+		cfg.InfluxDB.Username = username
+	}
+
+	if password := os.Getenv("INFLUXDB_PASSWORD"); password != "" {
+		cfg.InfluxDB.Password = password
+	}
+
+	// Database config
+	if dbType := os.Getenv("DB_TYPE"); dbType != "" {
+		cfg.DB.Type = dbType
+	}
+
+	if dbHost := os.Getenv("DB_HOST"); dbHost != "" {
+		cfg.DB.Host = dbHost
+	}
+
+	if dbPortStr := os.Getenv("DB_PORT"); dbPortStr != "" {
+		if dbPort, err := strconv.Atoi(dbPortStr); err == nil {
+			cfg.DB.Port = dbPort
+		}
+	}
+
+	if dbUsername := os.Getenv("DB_USERNAME"); dbUsername != "" {
+		cfg.DB.Username = dbUsername
+	}
+
+	if dbPassword := os.Getenv("DB_PASSWORD"); dbPassword != "" {
+		cfg.DB.Password = dbPassword
+	}
+
+	if dbDatabase := os.Getenv("DB_DATABASE"); dbDatabase != "" {
+		cfg.DB.Database = dbDatabase
+	}
+
+	if dbSSLMode := os.Getenv("DB_SSL_MODE"); dbSSLMode != "" {
+		cfg.DB.SSLMode = dbSSLMode
+	}
+
+	if dbCharset := os.Getenv("DB_CHARSET"); dbCharset != "" {
+		cfg.DB.Charset = dbCharset
+	}
+}