Go-gin CORS 跨域中间件

原文：https://stackoverflow.com/questions/29418478/go-gin-framework-cors

func CORSMiddleware() gin.HandlerFunc {

    return func(c *gin.Context) {

        c.Writer.Header().Set("Access-Control-Allow-Origin", "*")

        c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")

        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")

        c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT")

        if c.Request.Method == "OPTIONS" {

            c.AbortWithStatus(204)

            return

        }

        c.Next()

    }

}