96 lines
2.4 KiB
Go
96 lines
2.4 KiB
Go
|
// Package websocket 提供WebSocket HTTP升级处理器
|
|||
|
|
package websocket
|
|||
|
|
|
|||
|
|
import (
|
|||
|
|
"log"
|
|||
|
|
"net/http"
|
|||
|
|
|
|||
|
|
"github.com/gin-gonic/gin"
|
|||
|
|
"github.com/gorilla/websocket"
|
|||
|
|
)
|
|||
|
|
|
|||
|
|
// upgrader 用于将HTTP连接升级为WebSocket连接
|
|||
|
|
var upgrader = websocket.Upgrader{
|
|||
|
|
ReadBufferSize: 1024, // 读缓冲区大小
|
|||
|
|
WriteBufferSize: 1024, // 写缓冲区大小
|
|||
|
|
// 允许所有来源的连接（开发环境）
|
|||
|
|
CheckOrigin: func(r *http.Request) bool {
|
|||
|
|
return true
|
|||
|
|
},
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// HandleWebSocket 处理WebSocket连接升级请求（Gin版本）
|
|||
|
|
// 客户端通过此接口建立WebSocket连接，加入Hub进行消息通信
|
|||
|
|
// 路径: GET /api/ws
|
|||
|
|
func HandleWebSocket(hub *Hub) gin.HandlerFunc {
|
|||
|
|
return func(c *gin.Context) {
|
|||
|
|
handleWS(hub, c.Writer, c.Request)
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// HandleWebSocketHTTP 处理WebSocket连接升级请求（标准net/http版本）
|
|||
|
|
// 用于独立的WebSocket服务（端口16703）
|
|||
|
|
func HandleWebSocketHTTP(hub *Hub) http.HandlerFunc {
|
|||
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|||
|
|
handleWS(hub, w, r)
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// handleWS WebSocket连接处理的核心逻辑
|
|||
|
|
func handleWS(hub *Hub, w http.ResponseWriter, r *http.Request) {
|
|||
|
|
// 将HTTP连接升级为WebSocket连接
|
|||
|
|
conn, err := upgrader.Upgrade(w, r, nil)
|
|||
|
|
if err != nil {
|
|||
|
|
log.Printf("WebSocket升级失败: %v", err)
|
|||
|
|
return
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 创建客户端实例并注册到Hub
|
|||
|
|
client := &Client{
|
|||
|
|
hub: hub,
|
|||
|
|
conn: conn,
|
|||
|
|
send: make(chan []byte, 256),
|
|||
|
|
}
|
|||
|
|
hub.register <- client
|
|||
|
|
|
|||
|
|
// 启动读写goroutine
|
|||
|
|
go client.writePump()
|
|||
|
|
go client.readPump()
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// readPump 从WebSocket连接读取消息
|
|||
|
|
// 持续监听客户端发送的消息，遇到错误或关闭时断开连接
|
|||
|
|
func (c *Client) readPump() {
|
|||
|
|
defer func() {
|
|||
|
|
c.hub.unregister <- c
|
|||
|
|
c.conn.Close()
|
|||
|
|
}()
|
|||
|
|
|
|||
|
|
for {
|
|||
|
|
// 读取消息（目前仅用于检测连接状态，后续可扩展协作协议）
|
|||
|
|
_, message, err := c.conn.ReadMessage()
|
|||
|
|
if err != nil {
|
|||
|
|
if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseNormalClosure) {
|
|||
|
|
log.Printf("WebSocket读取错误: %v", err)
|
|||
|
|
}
|
|||
|
|
break
|
|||
|
|
}
|
|||
|
|
// 收到客户端消息后广播给其他客户端（协作基础）
|
|||
|
|
c.hub.BroadcastMessage(message)
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// writePump 向WebSocket连接写入消息
|
|||
|
|
// 从send通道读取消息并发送给客户端
|
|||
|
|
func (c *Client) writePump() {
|
|||
|
|
defer c.conn.Close()
|
|||
|
|
|
|||
|
|
for message := range c.send {
|
|||
|
|
err := c.conn.WriteMessage(websocket.TextMessage, message)
|
|||
|
|
if err != nil {
|
|||
|
|
log.Printf("WebSocket写入错误: %v", err)
|
|||
|
|
break
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|