init_main.go

package main

import (
	"fmt"
	"net/http"

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

//CORSMiddleware ...
func CORSMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		// 跨域配置
		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
		c.Writer.Header().Set("Access-Control-Max-Age", "86400")
		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
		c.Writer.Header().Set("Access-Control-Allow-Headers", "X-Requested-With, Content-Type, Origin, Authorization, Accept, Client-Security-Token, Accept-Encoding, x-access-token")
		c.Writer.Header().Set("Access-Control-Expose-Headers", "Content-Length")
		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")

		if c.Request.Method == "OPTIONS" {
			fmt.Println("OPTIONS")
			c.AbortWithStatus(200)
		} else {
			c.Next()
		}
	}
}

func main() {
	r := gin.Default()

	r.Use(CORSMiddleware())
	/*
		apiUser := r.Group("/api/user")
		{
		}
	*/

	// r.LoadHTMLGlob("./public/*.html")

	// r.Static("/static", "./casem/case_go/public/static")

	r.GET("/", func(c *gin.Context) {
		c.HTML(http.StatusOK, "index.html", gin.H{})
	})

	r.NoRoute(func(c *gin.Context) {
		c.HTML(404, "index.html", gin.H{})
	})

	r.Run(":20989")
}