package server

import (
	"crypto/md5"
	"embed"
	"fmt"
	"github.com/gin-gonic/gin"
	"net/http"
	"packet-ui/pkg"
	"strings"
)

/*
	embed static web learn from opensource license MIT
	see "github.com/v2rayA/v2rayA/server/router/index.go"
*/

// webRootFS 嵌入静态文件
//
//go:embed web
var webRootFS embed.FS

// html 缓存 HTML 页面
func html(html []byte) func(ctx *gin.Context) {
	etag := fmt.Sprintf("W/%x", md5.Sum(html))
	h := pkg.B2S(html)
	return func(ctx *gin.Context) {
		if ctx.IsAborted() {
			return
		}
		ctx.Header("Content-Type", "text/html; charset=utf-8")
		ctx.Header("Cache-Control", "public, must-revalidate")
		ctx.Header("ETag", etag)
		if match := ctx.GetHeader("If-None-Match"); match != "" {
			if strings.Contains(match, etag) {
				ctx.Status(http.StatusNotModified)
				return
			}
		}
		ctx.String(http.StatusOK, h)
	}
}