【Go】beego跨域设置方法

golagn beego

Access to CSS stylesheet at ‘xxx’ from origin ‘xx’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.

请求后台信息，弹出上面错误提示，就是不同域名下引起的跨域问题。
跨域问题不止要求一级域名相同，二级域名也要求相同，例如 a.tl.beer 和 b.tl.beer 就属于不同域的，同样的http://请求https://也会引起跨域问题

方法一：

允许指定域名发请求
可以加到入口main.go，也可加到任一控制器 init()函数中

package main

import (
	beego "github.com/beego/beego/v2/server/web"
	"github.com/beego/beego/v2/server/web/filter/cors"
)

func main() {
	beego.InsertFilter("*", beego.BeforeRouter, cors.Allow(&cors.Options{
		// 允许指定源
		AllowOrigins: []string{"https://a.tl.beer", "http://a.tl.beer", "https://b.tl.beer", "http://b.tl.beer"},
		// 可选参数"GET", "POST", "PUT", "DELETE", "OPTIONS" (*为所有)
		AllowMethods: []string{"GET", "POST", "PUT"},
		// 指的是允许的Header的种类
		AllowHeaders: []string{"Origin", "Authorization", "Access-Control-Allow-Origin", "Access-Control-Allow-Headers", "Content-Type"},
		// 公开的HTTP标头列表
		ExposeHeaders: []string{"Content-Length", "Access-Control-Allow-Origin", "Access-Control-Allow-Headers", "Content-Type"},
	
	}))

	beego.Run()
}