72 lines
1.2 KiB
Go
72 lines
1.2 KiB
Go
package ws
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import (
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"log"
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"net/http"
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"sync"
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"github.com/gorilla/websocket"
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)
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var upgrader = websocket.Upgrader{
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CheckOrigin: func(r *http.Request) bool { return true },
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}
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type Hub struct {
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mu sync.RWMutex
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clients map[*websocket.Conn]bool
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}
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func NewHub() *Hub {
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return &Hub{
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clients: make(map[*websocket.Conn]bool),
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}
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}
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func (h *Hub) Run() {
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// Hub is passive — broadcasts are push-based via Broadcast()
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select {}
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}
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func (h *Hub) Register(conn *websocket.Conn) {
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h.mu.Lock()
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h.clients[conn] = true
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h.mu.Unlock()
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}
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func (h *Hub) Unregister(conn *websocket.Conn) {
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h.mu.Lock()
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delete(h.clients, conn)
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h.mu.Unlock()
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conn.Close()
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}
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func (h *Hub) Broadcast(msg []byte) {
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h.mu.RLock()
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defer h.mu.RUnlock()
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for conn := range h.clients {
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if err := conn.WriteMessage(websocket.TextMessage, msg); err != nil {
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log.Printf("ws write error: %v", err)
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conn.Close()
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delete(h.clients, conn)
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}
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}
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}
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func HandleWebSocket(hub *Hub, w http.ResponseWriter, r *http.Request) {
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conn, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Printf("ws upgrade error: %v", err)
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return
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}
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hub.Register(conn)
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defer hub.Unregister(conn)
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for {
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_, _, err := conn.ReadMessage()
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if err != nil {
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break
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}
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}
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}
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