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90 lines
1.6 KiB
90 lines
1.6 KiB
package sys
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"sync"
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"time"
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)
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// 定义消息结构体
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type Message struct {
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Type string `json:"type"`
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Data interface{} `json:"data"`
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}
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// 定义一个结构体来保存客户端连接
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type client struct {
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conn http.ResponseWriter
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}
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var clients = make(map[*client]bool)
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var mutex sync.Mutex
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// 处理客户端连接
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func HandleSystemEvents(w http.ResponseWriter, r *http.Request) {
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// 设置响应头
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w.Header().Set("Content-Type", "text/event-stream")
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w.Header().Set("Cache-Control", "no-cache")
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w.Header().Set("Connection", "keep-alive")
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// 创建客户端连接对象
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c := &client{conn: w}
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// 添加客户端到列表
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mutex.Lock()
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clients[c] = true
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mutex.Unlock()
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// 发送初始消息
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updateInfo, err := GetUpdateInfo()
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if err == nil {
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SendToClient(c, Message{
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Type: "update",
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Data: updateInfo,
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})
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}
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// 监听客户端关闭
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defer func() {
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mutex.Lock()
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delete(clients, c)
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mutex.Unlock()
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}()
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// 读取客户端请求直到关闭
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for {
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select {
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case <-r.Context().Done():
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return
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}
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}
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}
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// 向客户端发送消息
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func SendToClient(c *client, msg Message) {
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jsonMsg, err := json.Marshal(msg)
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if err != nil {
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fmt.Println("Error marshaling JSON:", err)
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return
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}
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fmt.Fprintf(c.conn, "data: %s\n\n", jsonMsg)
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c.conn.(http.Flusher).Flush()
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}
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// 广播消息给所有客户端
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func Broadcast(msg Message) {
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mutex.Lock()
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defer mutex.Unlock()
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for c := range clients {
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SendToClient(c, msg)
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}
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}
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// 每隔一段时间广播一条消息
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func SendMessagePeriodically(msg Message) {
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ticker := time.NewTicker(1 * time.Second)
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for range ticker.C {
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Broadcast(msg)
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}
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}
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