用nc接收浏览器请求的时候有跨域OPTION请求无法跳过，写了个替代的小脚本

ignore_cors.go

package main

import (
	"flag"
	"fmt"
	"github.com/gin-gonic/gin"
	"net/http/httputil"
)

func CORS() gin.HandlerFunc {
	return func(c *gin.Context) {
		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
		c.Writer.Header().Set("Access-Control-Allow-Headers", "*")
		c.Writer.Header().Set("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, DELETE, OPTIONS, PATCH")

		if c.Request.Method == "OPTIONS" {
			c.AbortWithStatus(204)
			return
		}

		c.Next()
	}
}

func main() {
	router := gin.Default()
	router.Use(CORS())

	router.Any("/*any", func(c *gin.Context) {
		fmt.Println(c.Request.Host, c.Request.RemoteAddr, c.Request.RequestURI)
		requestDump, err := httputil.DumpRequest(c.Request, true)
		if err != nil {
			fmt.Println(err)
		}
		fmt.Println(string(requestDump))
		c.JSON(200, gin.H{"message": "pong"})
	})

	addr := flag.String("a", "127.0.0.1:8080", "listen addr")
	flag.Parse()

	router.Run(*addr)
}