package middleware import ( "github.com/gin-gonic/gin" "net/http" ) func CorsHandler() gin.HandlerFunc { return func(context *gin.Context) { context.Writer.Header().Set("Access-Control-Allow-Origin", "*") context.Header("Access-Control-Allow-Methods", "*") context.Header("Access-Control-Allow-Headers", "*") context.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers,Cache-Control,Content-Language,Content-Type,Expires,Last-Modified,Pragma,FooBar") // 跨域关键设置 让浏览器可以解析 context.Header("Access-Control-Max-Age", "172800") // 缓存请求信息 单位为秒 context.Header("Access-Control-Allow-Credentials", "false") // 跨域请求是否需要带cookie信息 默认设置为true context.Header("content-type", "application/json") // 设置返回格式是json //Release all option pre-requests if context.Request.Method == http.MethodOptions { context.JSON(http.StatusOK, "Options Request!") } context.Next() } }