package middleware

import (
	"github.com/gin-gonic/gin"
)

// Cors 跨域中间件
func Cors() gin.HandlerFunc {
	// 处理CORS请求
	return func(c *gin.Context) {
		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")                                                                                                                            // 允许所有源
		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")                                                                                                                    // 允许携带cookie
		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With") // 允许的请求头
		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, DELETE, PATCH")                                                                                      // 允许的请求方法

		// 处理OPTIONS请求
		if c.Request.Method == "OPTIONS" {
			c.AbortWithStatus(204) // 返回204
			return
		}
		// 处理正常请求
		c.Next()
	}
}