重构后端服务架构并优化前端错误处理

go-backend/config/database.go

@@ -0,0 +1,33 @@
+package config
+
+import (
+	"log"
+	"os"
+
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+var DB *gorm.DB
+
+func InitDB() {
+	var err error
+	
+	// Get database configuration from environment variables
+	host := os.Getenv("DB_HOST")
+	port := os.Getenv("DB_PORT")
+	user := os.Getenv("DB_USER")
+	password := os.Getenv("DB_PASSWORD")
+	dbname := os.Getenv("DB_NAME")
+	
+	// Create DSN (Data Source Name)
+	dsn := user + ":" + password + "@tcp(" + host + ":" + port + ")/" + dbname + "?charset=utf8mb4&parseTime=True&loc=Local"
+	
+	// Connect to database
+	DB, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
+	if err != nil {
+		log.Fatal("Failed to connect to database:", err)
+	}
+	
+	log.Println("Database connection established")
+}