Go gin框架CORS

FWIW，这是我的CORS中间件，可满足我的需求。

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()    }}