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// MIT License
//
// Copyright (c) 2024 godoos.com
// Email: xpbb@qq.com
// GitHub: github.com/phpk/godoos
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package sys
import (
"encoding/json"
"fmt"
"godo/localchat"
"net/http"
"sync"
"time"
)
// 定义消息结构体
type Message struct {
Type string `json:"type"`
Data interface{} `json:"data"`
}
// 定义一个结构体来保存客户端连接
type client struct {
conn http.ResponseWriter
}
var clients = make(map[*client]bool)
var mutex sync.Mutex
// 处理客户端连接
func HandleSystemEvents(w http.ResponseWriter, r *http.Request) {
// 设置响应头
w.Header().Set("Content-Type", "text/event-stream")
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Connection", "keep-alive")
// 创建客户端连接对象
c := &client{conn: w}
// 添加客户端到列表
mutex.Lock()
clients[c] = true
mutex.Unlock()
// 发送初始消息
updateInfo, err := GetUpdateInfo()
if err == nil {
SendToClient(c, Message{
Type: "update",
Data: updateInfo,
})
}
// 监听客户端关闭
defer func() {
mutex.Lock()
delete(clients, c)
mutex.Unlock()
}()
// 使用定时器轮询客户端请求
ticker := time.NewTicker(1 * time.Second)
defer ticker.Stop()
for range ticker.C {
// 检查客户端是否已断开连接
if r.Context().Err() != nil {
return
}
userMessages := localchat.GetMessages()
msg := Message{
Type: "localchat",
Data: userMessages,
}
Broadcast(msg)
localchat.ClearAllUserMessages()
}
}
// 向客户端发送消息
func SendToClient(c *client, msg Message) {
jsonMsg, err := json.Marshal(msg)
if err != nil {
fmt.Println("Error marshaling JSON:", err)
return
}
fmt.Fprintf(c.conn, "data: %s\n\n", jsonMsg)
c.conn.(http.Flusher).Flush()
}
// 广播消息给所有客户端
func Broadcast(msg Message) {
mutex.Lock()
defer mutex.Unlock()
for c := range clients {
SendToClient(c, msg)
}
}
// 每隔一段时间广播一条消息
func SendMessagePeriodically(msg Message) {
ticker := time.NewTicker(1 * time.Second)
for range ticker.C {
Broadcast(msg)
}
}