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177 lines
4.5 KiB
177 lines
4.5 KiB
// MIT License
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//
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// Copyright (c) 2024 godoos.com
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// Email: xpbb@qq.com
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// GitHub: github.com/phpk/godoos
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package localchat
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import (
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"encoding/json"
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"godo/libs"
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"log"
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"net"
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"strings"
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"time"
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)
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type UdpMessage struct {
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Hostname string `json:"hostname"`
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Type string `json:"type"`
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Time time.Time `json:"time"`
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IP string `json:"ip"`
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Message any `json:"message"`
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}
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type UserMessage struct {
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Messages map[string][]UdpMessage `json:"messages"`
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Onlines map[string]UserStatus `json:"onlines"`
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}
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type UserStatus struct {
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Hostname string `json:"hostname"`
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IP string `json:"ip"`
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Time time.Time `json:"time"`
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}
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var OnlineUsers = make(map[string]UserStatus)
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var UserMessages = make(map[string][]UdpMessage)
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func init() {
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go UdpServer()
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go CheckOnlines()
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}
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func CheckOnlines() {
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//CheckOnline()
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chatIpSetting := libs.GetChatIpSetting()
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checkTimeDuration := time.Duration(chatIpSetting.CheckTime) * time.Second
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ticker := time.NewTicker(checkTimeDuration)
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defer ticker.Stop()
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for range ticker.C {
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// 检查客户端是否已断开连接
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CheckOnline()
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}
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}
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// UDP 服务器端逻辑
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func UdpServer() {
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// 监听 UDP 端口
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listener, err := net.ListenPacket("udp", ":56780")
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if err != nil {
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log.Fatalf("error setting up listener: %v", err)
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}
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defer listener.Close()
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log.Println("UDP server started on :56780")
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// 监听 UDP 请求
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for {
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buffer := make([]byte, 1024)
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n, remoteAddr, err := listener.ReadFrom(buffer)
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if err != nil {
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log.Printf("error reading from UDP: %v", err)
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continue
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}
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log.Printf("Received UDP packet from %v: %s", remoteAddr, buffer[:n])
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// 从 remoteAddr 获取 IP 地址
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udpAddr, ok := remoteAddr.(*net.UDPAddr)
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if !ok {
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log.Printf("unexpected address type: %T", remoteAddr)
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continue
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}
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ip := udpAddr.IP.String()
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parts := strings.Split(string(buffer[:n]), "@") // 假设标识符不会超过256字节
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if len(parts) >= 5 {
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filename, err := ReceiveFiles(parts)
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if err != nil {
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log.Printf("error receiving file: %v", err)
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continue
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}
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msg := UdpMessage{
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Hostname: parts[1],
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Type: parts[0],
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Time: time.Now(),
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IP: ip,
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Message: filename,
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}
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AddMessage(msg)
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continue
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}
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// 解析 UDP 数据
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var udpMsg UdpMessage
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err = json.Unmarshal(buffer[:n], &udpMsg)
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if err != nil {
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log.Printf("error unmarshalling UDP message: %v", err)
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continue
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}
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udpMsg.IP = ip
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if udpMsg.Type == "heartbeat" {
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UpdateUserStatus(udpMsg.IP, udpMsg.Hostname)
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continue
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}
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// if udpMsg.Type == "file" {
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// ReceiveFile(udpMsg)
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// continue
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// }
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if udpMsg.Type == "fileAccessed" {
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HandlerSendFile(udpMsg)
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continue
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}
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// if udpMsg.Type == "image" {
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// filePath, err := ReceiveFile(udpMsg)
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// if err != nil {
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// log.Printf("error receiving image: %v", err)
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// continue
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// }
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// udpMsg.Message = filePath
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// }
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// 添加消息到 UserMessages
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AddMessage(udpMsg)
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}
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}
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func ClearAllUserMessages() {
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UserMessages = make(map[string][]UdpMessage)
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}
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func GetMessages() UserMessage {
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return UserMessage{
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Messages: UserMessages,
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Onlines: OnlineUsers,
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}
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}
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func AddMessage(msg UdpMessage) {
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// 检查 UserMessages 中是否已经有这个 IP 地址的消息列表
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if _, ok := UserMessages[msg.IP]; !ok {
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// 如果没有,则创建一个新的消息列表
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UserMessages[msg.IP] = []UdpMessage{}
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}
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// 将新消息添加到对应 IP 地址的消息列表中
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UserMessages[msg.IP] = append(UserMessages[msg.IP], msg)
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}
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