hldrCenter/server/middleware/cors.go

package middleware

import (
	"fmt"
	"net/http"

	"github.com/JACKYMYPERSON/hldrCenter/config"
	"github.com/gin-gonic/gin"
)

func CorsMiddleware(serverConfig *config.ServerConfig) gin.HandlerFunc {
	return func(c *gin.Context) {
		// 1. 打印配置的允许源（调试用，确认配置是否正确加载）
		fmt.Printf("允许的前端源：%v\n", serverConfig.AllowedOrigins)

		// 2. 获取请求的Origin头
		origin := c.Request.Header.Get("Origin")
		fmt.Printf("当前请求源：%s\n", origin) // 调试用

		// 3. 宽松的跨域匹配逻辑
		allowOrigin := ""
		if len(serverConfig.AllowedOrigins) > 0 {
			for _, allowed := range serverConfig.AllowedOrigins {
				// 支持通配符*，或精确匹配
				if allowed == "*" || allowed == origin {
					allowOrigin = origin
					break
				}
			}
		}

		if allowOrigin != "" {
			c.Writer.Header().Set("Access-Control-Allow-Origin", allowOrigin)
		}
		c.Writer.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
		c.Writer.Header().Set("Access-Control-Allow-Headers", "Origin, Content-Type, Accept, Authorization")
		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
		c.Writer.Header().Set("Access-Control-Max-Age", "86400") // 24小时缓存预检请求

		// 6. 处理OPTIONS预检请求
		if c.Request.Method == "OPTIONS" {
			c.AbortWithStatus(http.StatusNoContent) // 使用204更规范
			return
		}

		c.Next()
	}
}