不说废话
在main函数前加入如下代码
func init() {
//跨域设置
var FilterGateWay = func(ctx *context.Context) {ctx.ResponseWriter.Header().Set("Access-Control-Allow-Origin", "*")
//允许访问源
ctx.ResponseWriter.Header().Set("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS")
//允许post访问
ctx.ResponseWriter.Header().Set("Access-Control-Allow-Headers","Access-Control-Allow-Origin,ContentType,Authorization,accept,accept-encoding, authorization, content-type") //header的类型
ctx.ResponseWriter.Header().Set("Access-Control-Max-Age", "1728000")
ctx.ResponseWriter.Header().Set("Access-Control-Allow-Credentials", "true")
}
beego.InsertFilter("*", beego.BeforeRouter, FilterGateWay)
}
//路由设置
ns := beego.NewNamespace("/v1",
// 用于跨域请求
beego.NSRouter("*",&controllers.BaseController{},"OPTIONS:Options"),)
beego.AddNamespace(ns)
```
定义option函数回应预检请求(controller中)
```go
// @Title test
// @Description 预检
// @Success 200 {string} "hello world"
// @router / [options]
func (c *BaseController) Options() {
c.Data["json"] = map[string]interface{}{"status": 200, "message": "ok", "moreinfo": ""}
c.ServeJSON()
}
```
跨域请求是会先发送一个option请求，该请求如果收到响应（响应内容随便），客户端则才会继续发送请求
原文：https://www.cnblogs.com/qflyue/p/10295671.html