在golang的路上缓慢前进 Gin框架 跨域问题的解说与方法
代码如下：package main import ('github.com/gin-gonic/gin''awesomeProject/app/app_routers''strings''fmt''net/http') /* 路由初始化*/var (engine = gin.Default()) func main() { // 允许使用跨域请求 全局中间件engine.Use(Cors())//router.Use(cors.Default())// 传参 设定路由组 允许路由组使用路由app_routers.Router(engine)// 启动路由 设定端口Cors()engine.Run(':11000')//运行启动端口 } //// 跨域func Cors() gin.HandlerFunc {return func(c *gin.Context) {method := c.Request.Method//请求方法origin := c.Request.Header.Get('Origin')//请求头部var headerKeys []string// 声明请求头keysfor k, _ := range c.Request.Header {headerKeys = append(headerKeys, k)}headerStr := strings.Join(headerKeys, ', ')if headerStr != '' {headerStr = fmt.Sprintf('access-control-allow-origin, access-control-allow-headers, %s', headerStr)} else {headerStr = 'access-control-allow-origin, access-control-allow-headers'}if origin != '' {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truec.Set('content-type', 'application/json')// 设置返回格式是json} //放行所有OPTIONS方法if method == 'OPTIONS' {c.JSON(http.StatusOK, 'Options Request!')}// 处理请求c.Next()//处理请求}}
补充：gin框架中间件解决跨域问题
代码如下：func Cors(c *gin.Context) { c.Header('Access-Control-Allow-Origin', '*') c.Header('Access-Control-Allow-Headers', 'Content-Type,AccessToken,X-CSRF-Token, Authorization, Token') c.Header('Access-Control-Allow-Methods', 'POST, GET, OPTIONS, PUT, PATCH, DELETE') c.Header('Access-Control-Expose-Headers', 'Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Content-Type') c.Header('Access-Control-Allow-Credentials', 'true') //这里是解决vue那个坑 method := c.Request.Method // 放行所有OPTIONS方法，因为有的模板是要请求两次的 if method == 'OPTIONS' { c.AbortWithStatus(http.StatusNoContent) } // 处理请求 c.Next()}
以上为个人经验，希望能给大家一个参考，也希望大家多多支持乐呵呵网。如有错误或未考虑完全的地方，望不吝赐教。
