middleware/cors.go

package middleware

import (
	http "github.com/bogdanfinn/fhttp"
	"github.com/gin-gonic/gin"
)

func CORS() gin.HandlerFunc {
	return func(c *gin.Context) {
		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
		c.Writer.Header().Set("Access-Control-Allow-Headers", "*")
		c.Writer.Header().Set("Access-Control-Allow-Methods", "*")

		if c.Request.Method == http.MethodOptions {
			c.AbortWithStatus(http.StatusNoContent)
			return
		}

		c.Next()
	}
}