搭建Go后端框架：数据模型、JWT鉴权、租户隔离、WebSocket、REST API路由

server/internal/config/config.go

@@ -0,0 +1,64 @@
+package config
+
+import (
+	"os"
+	"time"
+)
+
+type Config struct {
+	Server   ServerConfig
+	Database DatabaseConfig
+	JWT      JWTConfig
+}
+
+type ServerConfig struct {
+	Port string
+	Mode string
+}
+
+type DatabaseConfig struct {
+	Host     string
+	Port     string
+	User     string
+	Password string
+	Name     string
+	SSLMode  string
+}
+
+type JWTConfig struct {
+	Secret     string
+	ExpireTime time.Duration
+}
+
+func Load() *Config {
+	return &Config{
+		Server: ServerConfig{
+			Port: getEnv("SERVER_PORT", "8080"),
+			Mode: getEnv("GIN_MODE", "debug"),
+		},
+		Database: DatabaseConfig{
+			Host:     getEnv("DB_HOST", "localhost"),
+			Port:     getEnv("DB_PORT", "5432"),
+			User:     getEnv("DB_USER", "postgres"),
+			Password: getEnv("DB_PASSWORD", "postgres"),
+			Name:     getEnv("DB_NAME", "kefu_sys"),
+			SSLMode:  getEnv("DB_SSLMODE", "disable"),
+		},
+		JWT: JWTConfig{
+			Secret:     getEnv("JWT_SECRET", "kefu-sys-secret-key"),
+			ExpireTime: 24 * time.Hour,
+		},
+	}
+}
+
+func (d *DatabaseConfig) DSN() string {
+	return "host=" + d.Host + " port=" + d.Port + " user=" + d.User +
+		" password=" + d.Password + " dbname=" + d.Name + " sslmode=" + d.SSLMode
+}
+
+func getEnv(key, fallback string) string {
+	if v := os.Getenv(key); v != "" {
+		return v
+	}
+	return fallback
+}