131 lines
2.6 KiB
Go
131 lines
2.6 KiB
Go
package internal
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import (
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"log"
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"time"
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"github.com/gorilla/websocket"
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)
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const (
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writeWait = 10 * time.Second
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pongWait = 60 * time.Second
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pingPeriod = 25 * time.Second
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)
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type Client struct {
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Conn *websocket.Conn
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Send chan []byte
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SubscribedPath string
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done chan struct{}
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}
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func NewClient(conn *websocket.Conn, subscribedPath string) *Client {
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return &Client{
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Conn: conn,
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Send: make(chan []byte, 64),
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SubscribedPath: subscribedPath,
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done: make(chan struct{}),
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}
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}
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type Hub struct {
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Clients map[*Client]bool
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Broadcast chan []byte
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Register chan *Client
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Unregister chan *Client
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}
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func NewHub() *Hub {
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return &Hub{
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Broadcast: make(chan []byte),
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Register: make(chan *Client),
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Unregister: make(chan *Client),
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Clients: make(map[*Client]bool),
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}
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}
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func (h *Hub) Run() {
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go func() {
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for {
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select {
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case client := <-h.Register:
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h.Clients[client] = true
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log.Println("Client registered")
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case c := <-h.Unregister:
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if _, ok := h.Clients[c]; ok {
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delete(h.Clients, c)
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close(c.Send)
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}
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log.Println("Client Unregistered")
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case message := <-h.Broadcast:
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for client := range h.Clients {
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select {
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case client.Send <- message:
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default:
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close(client.Send)
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delete(h.Clients, client)
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}
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}
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}
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}
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}()
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}
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func WritePump(c *Client, h *Hub) {
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pingTicker := time.NewTicker(pingPeriod)
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defer func() {
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h.Unregister <- c
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pingTicker.Stop()
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c.Conn.Close()
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}()
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for {
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select {
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case message, ok := <-c.Send:
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c.Conn.SetWriteDeadline(time.Now().Add(writeWait))
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if !ok {
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c.Conn.WriteMessage(websocket.CloseMessage, []byte{})
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return
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}
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if err := c.Conn.WriteMessage(websocket.TextMessage, message); err != nil {
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return
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}
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case <-pingTicker.C:
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c.Conn.SetWriteDeadline(time.Now().Add(writeWait))
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if err := c.Conn.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
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return
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}
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}
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}
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}
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func ReadPump(c *Client, h *Hub) {
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defer func() {
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h.Unregister <- c
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c.Conn.Close()
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}()
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c.Conn.SetReadLimit(512)
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c.Conn.SetReadDeadline(time.Now().Add(pongWait))
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c.Conn.SetPongHandler(func(string) error {
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c.Conn.SetReadDeadline(time.Now().Add(pongWait))
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return nil
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})
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for {
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messageType, message, err := c.Conn.ReadMessage()
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if err != nil {
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if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
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log.Printf("WebSocket error: %v", err)
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}
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break
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}
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if messageType == websocket.TextMessage {
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log.Printf("Received: %s\n", message)
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}
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}
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}
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