介绍什么是去 func 主要(),{
,,,openHttpListen ()
}
func openHttpListen (), {
,,,http.HandleFunc (“/?, receiveClientRequest)
,,,fmt.Println (“go server start 运行…“)
,,,err :=, http.ListenAndServe (“: 9090,,, nil)
,,,if err !=, nil {
,,,,,,,log.Fatal (“ListenAndServe:,,,,呃)
,,,}
}
func receiveClientRequest (w http.ResponseWriter, r * http.Request), {
,,,w.Header()这里(“Access-Control-Allow-Origin",,“*“),,,,,,,,,,,,,//允许访问所有域
,,,w.Header阀门()(“Access-Control-Allow-Headers",,“Content-Type"),//头的类型
,,,w.Header()这里(“content-type",,“应用程序/json"),,,,,,,,,,,,,//返回数据格式是json
,,,r.ParseForm ()
,,,fmt.Println(“收到客户端请求:,,,,r.Form) func LDNS (w http.ResponseWriter, req * http.Request), {
,,,if origin :=, req.Header.Get (“Origin");, origin !=,““, {
,,,,,,,w.Header()这里(“Access-Control-Allow-Origin",,原点)
,,,,,,,w.Header()这里(“Access-Control-Allow-Methods",,,,,,,,,,, DELETE")
,,,,,,,w.Header()这里(“Access-Control-Allow-Headers",
,,,,,,,,,,,,,,内容类型,,内容长度,,接受编码,,,Authorization" X-CSRF-Token)
,,,}
,,,if req.Method ==,“OPTIONS", {
,,,,,,,回来
,,,}
,,,//,响应http 代码
,,,w.WriteHeader (200)
,,,query :=, strings.Split (req.Host,,“!”)
,,,,,err :=, ldns.RAMDBMgr.Get(查询[0])
,,,fmt.Println (“Access-Control-Allow-Origin",,“*”)
,,,if err !=, nil {
,,,,,,,io.WriteString (w,“{“message":““}”)
,,,,,,,回来
,,,}
,,,io.WriteString (w,价值)
} import (
,“;github.com/gin-gonic/gin"
,“;net/http"
）//,跨域中间件
func 歌珥(),gin.HandlerFunc {
,return func (c * gin.Context), {
method 才能:=c.Request.Method
origin 才能;:=,c.Request.Header.Get (“Origin")
if 才能;origin !=,““, {
,,c.Header (“Access-Control-Allow-Origin",,原点)
,,c.Header (“Access-Control-Allow-Methods",,,,,,,,,,,删除,UPDATE")
,才能c.Header (“Access-Control-Allow-Headers",,,,, X-Requested-With,,内容类型,,接受,,Authorization")
,,c.Header (“Access-Control-Expose-Headers",,“内容长度,,Access-Control-Allow-Origin,, Access-Control-Allow-Headers,, cache - control,,内容语言,,Content-Type")
,,c.Header (“Access-Control-Allow-Credentials",,“false")
,,c.Set (“content-type",,“应用程序/json")
,,}
if 才能;method ==,“OPTIONS", {
,,c.AbortWithStatus (http.StatusNoContent)
,,}
c.Next才能()
,}
} router :=, gin.Default ()//,要在路由组之前全局使用“跨域中间件”,,否则选项会返回404
null
这篇文章将为大家详细讲解有关去原生http web服务跨域restful api的写法示例,小编觉得挺实用的,因此分享给大家做个参考,希望大家阅读完这篇文章后可以有所收获。
去是golang的简称,golang是谷歌开发的一种静态强类型,编译型,并发型,并具有垃圾回收功能的编程语言,其语法与C语言相近,但并不包括如枚举,异常处理,继承,泛型、断言,虚函数等功能。
错误写法
这样还是会报错:
说没有得到响应跨域的头,chrome的网络中确实没有响应Access-Control-Allow-Origin
正确写法:
<>强补充:去http允许跨域
