core.go
package middleware
import (
"github.com/gin-gonic/gin"
"net/http"
)
func Cors() gin.HandlerFunc {
return func(c *gin.Context) {
origin := c.Request.Header.Get("Origin") // 请求头部
if origin != "" {
// 接收客户端发送的origin
c.Writer.Header().Set("Access-Control-Allow-Origin", origin)
//服务器支持的所有跨域请求的方法
c.Header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD")
//允许跨域设置可以返回其他子段，可以自定义字段
c.Header("Access-Control-Allow-Headers", "Origin, Content-Length, Content-Type, Authorization, Cookie, Set-Cookie")
// 允许浏览器（客户端）可以解析的头部
c.Header("Access-Control-Expose-Headers", "Content-Length, Content-Type, Access-Control-Allow-Origin, Access-Control-Allow-Headers")
//设置缓存时间
c.Header("Access-Control-Max-Age", "172800")
//允许客户端传递校验信息比如 cookie
c.Header("Access-Control-Allow-Credentials", "true")
}
if c.Request.Method == "OPTIONS" {
c.AbortWithStatus(http.StatusNoContent)
return
}
c.Next()
}
}
router.go
r := gin.New()
// 跨域
r.Use(middleware.Cors()) // 开启中间件，允许实现跨域请求
}
