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/*
* GodoOS - A lightweight cloud desktop
* Copyright (C) 2024 https://godoos.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package localchat
import (
"encoding/json"
"fmt"
"godo/libs"
"log"
"net"
"net/http"
"os"
"time"
)
// HandleMessage 处理 HTTP 请求
func HandleMessage(w http.ResponseWriter, r *http.Request) {
var msg UdpMessage
decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(&msg); err != nil {
http.Error(w, "Invalid request body", http.StatusBadRequest)
return
}
defer r.Body.Close()
hostname, err := os.Hostname()
if err != nil {
libs.ErrorMsg(w, "HandleMessage error")
return
}
msg.Hostname = hostname
msg.Time = time.Now()
err = SendToIP(msg)
if err != nil {
http.Error(w, "Failed to send message", http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusOK)
fmt.Fprintln(w, "Text message send successfully")
}
// SendToIP 向指定的 IP 地址发送 UDP 消息
func SendToIP(message UdpMessage) error {
toIp := message.IP
port := "56780"
addr, err := net.ResolveUDPAddr("udp4", fmt.Sprintf("%s:%s", toIp, port))
if err != nil {
log.Printf("Failed to resolve UDP address %s:%s: %v", toIp, port, err)
return err
}
// 使用本地地址进行连接
localAddr, err := net.ResolveUDPAddr("udp4", "0.0.0.0:0")
if err != nil {
log.Printf("Failed to resolve local UDP address: %v", err)
return err
}
conn, err := net.ListenUDP("udp4", localAddr)
if err != nil {
log.Printf("Failed to listen on UDP address %s: %v", toIp, err)
return err
}
defer conn.Close()
data, err := json.Marshal(message)
if err != nil {
log.Printf("Failed to marshal JSON for %s: %v", toIp, err)
return err
}
_, err = conn.WriteToUDP(data, addr)
if err != nil {
log.Printf("Failed to write to UDP address %s: %v", toIp, err)
return err
}
log.Printf("发送 UDP 消息到 %s 成功", toIp)
return nil
}