gin cors

...

package main

import (
	"github.com/gin-gonic/gin"
)

func pingHandle(c *gin.Context) {
	c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
	c.Header("Access-Control-Allow-Origin", "*")        // 这是允许访问所有域
	c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE,UPDATE")      //服务器支持的所有跨域请求的方法,为了避免浏览次请求的多次'预检'请求
	//  header的类型
	c.Header("Access-Control-Allow-Headers", "Authorization, Content-Length, X-CSRF-Token, Token,session,X_Requested_With,Accept, Origin, Host, Connection, Accept-Encoding, Accept-Language,DNT, X-CustomHeader, Keep-Alive, User-Agent, X-Requested-With, If-Modified-Since, Cache-Control, Content-Type, Pragma")
	//              允许跨域设置                                                                                                      可以返回其他子段
	c.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
	c.Header("Access-Control-Max-Age", "172800")        // 缓存请求信息 单位为秒
	c.Header("Access-Control-Allow-Credentials", "false")       //  跨域请求是否需要带cookie信息 默认设置为true
	c.Set("content-type", "application/json")       // 设置返回格式是json

	std := []Stu{{"11","name"},{"12","huzh"}}
	//jsonData := []byte(`[{"id":"11","name":"huzh"}]`)
	//c.Data(http.StatusOK,"application/json",jsonData)
	//c.DefaultQuery("name")
	c.JSON(200, gin.H{
		"datakey":std ,
	})
}


//文件可能很大，gin默认内存最大文件是32M，超出部分则流形式一点点读，也可以设置
// router.MaxMultipartMemory = 8 << 20 // 8 MiB
type Stu struct {
	Id string `json:"id"`
	Name string `json:"name"`
}
func main() {

	r := gin.Default()
	r.GET("ping", pingHandle)
	r.Run(":9800") //默认不传递则是9090
}