package codec

import (
	"log"

	"github.com/panjf2000/gnet/v2"
)

// CROSS_DOMAIN 定义跨域策略文件内容
const CROSS_DOMAIN = "<?xml version=\"1.0\"?><!DOCTYPE cross-domain-policy><cross-domain-policy><allow-access-from domain=\"*\" to-ports=\"*\" /></cross-domain-policy>\x00"

// TEXT 定义跨域请求的文本格式
const TEXT = "<policy-file-request/>\x00"

// Handle 处理网络连接
func Handle(conn gnet.Conn) error {
	// 读取数据并检查是否为跨域请求
	data, err := conn.Peek(len(TEXT))
	if err != nil {
		log.Printf("Error reading cross-domain request: %v", err)
		return err
	}

	if string(data) == TEXT { //判断是否是跨域请求
		log.Printf("Received cross-domain request from %s", conn.RemoteAddr())
		// 处理跨域请求
		conn.Write([]byte(CROSS_DOMAIN))
		conn.Discard(len(TEXT))
		return nil
	}

	return nil
}