GO/app/lib/websocket/websocket.go

package websocket

import (
	"fmt"
	"git.oa00.com/go/logger"
	"github.com/gorilla/websocket"
	"sync"
)

// Manager 所有 websocket 信息
type Manager struct {
	Group                   map[string]map[string]*Client
	groupCount, clientCount uint
	Lock                    sync.Mutex
	Register, UnRegister    chan *Client
	Message                 chan *MessageData
	GroupMessage            chan *GroupMessageData
	BroadCastMessage        chan *BroadCastMessageData
}

// Client 单个 websocket 信息
type Client struct {
	Id, Group string
	Socket    *websocket.Conn
	Message   chan []byte
}

// MessageData messageData 单个发送数据信息
type MessageData struct {
	Id, Group string
	Message   []byte
}

// GroupMessageData groupMessageData 组广播数据信息
type GroupMessageData struct {
	Group   string
	Message []byte
}

// BroadCastMessageData 广播发送数据信息
type BroadCastMessageData struct {
	Message []byte
}

const (
	BrokerKey   = "broker_id_%d"
	CustomerKey = "customer_id_%d"
)

// 读信息，从 websocket 连接直接读取数据
func (c *Client) Read(callback func(int, []byte)) {
	defer func() {
		WebsocketManager.UnRegister <- c
		logger.Logger.Info(fmt.Sprintf("client [%s] disconnect", c.Id))
		if err := c.Socket.Close(); err != nil {
			logger.Logger.Info(fmt.Sprintf("client [%s] disconnect err: %s", c.Id, err))
		}
	}()

	for {
		messageType, message, err := c.Socket.ReadMessage()
		if err != nil || messageType == websocket.CloseMessage {
			break
		}
		callback(messageType, message)
	}
}

// 写信息，从 channel 变量 Send 中读取数据写入 websocket 连接
func (c *Client) Write() {
	defer func() {
		logger.Logger.Info(fmt.Sprintf("client [%s] disconnect", c.Id))
		if err := c.Socket.Close(); err != nil {
			logger.Logger.Info(fmt.Sprintf("client [%s] disconnect err: %s", c.Id, err))
		}
	}()

	for {
		select {
		case message, ok := <-c.Message:
			if !ok {
				_ = c.Socket.WriteMessage(websocket.CloseMessage, []byte{})
				return
			}
			err := c.Socket.WriteMessage(websocket.BinaryMessage, message)
			if err != nil {
				logger.Logger.Info(fmt.Sprintf("client [%s] writemessage err: %s", c.Id, err))
			}
		}
	}
}

// Start 启动 websocket 管理器
func (manager *Manager) Start() {
	logger.Logger.Info(fmt.Sprintf("websocket manage start"))
	for {
		select {
		// 注册
		case client := <-manager.Register:
			logger.Logger.Info(fmt.Sprintf("client [%s] connect", client.Id))
			logger.Logger.Info(fmt.Sprintf("register client [%s] to group [%s]", client.Id, client.Group))

			manager.Lock.Lock()
			if manager.Group[client.Group] == nil {
				manager.Group[client.Group] = make(map[string]*Client)
				manager.groupCount += 1
			}
			manager.Group[client.Group][client.Id] = client
			manager.clientCount += 1
			manager.Lock.Unlock()

		// 注销
		case client := <-manager.UnRegister:
			logger.Logger.Info(fmt.Sprintf("unregister client [%s] from group [%s]", client.Id, client.Group))
			manager.Lock.Lock()
			if _, ok := manager.Group[client.Group]; ok {
				if _, ok := manager.Group[client.Group][client.Id]; ok {
					close(client.Message)
					delete(manager.Group[client.Group], client.Id)
					manager.clientCount -= 1
					if len(manager.Group[client.Group]) == 0 {
						//log.Printf("delete empty group [%s]", client.Group)
						delete(manager.Group, client.Group)
						manager.groupCount -= 1
					}
				}
			}
			manager.Lock.Unlock()

			// 发送广播数据到某个组的 channel 变量 Send 中
			//case data := <-manager.boardCast:
			//	if groupMap, ok := manager.wsGroup[data.GroupId]; ok {
			//		for _, conn := range groupMap {
			//			conn.Send <- data.Data
			//		}
			//	}
		}
	}
}

// SendService 处理单个 client 发送数据
func (manager *Manager) SendService() {
	for {
		select {
		case data := <-manager.Message:
			if groupMap, ok := manager.Group[data.Group]; ok {
				if conn, ok := groupMap[data.Id]; ok {
					conn.Message <- data.Message
				}
			}
		}
	}
}

// SendGroupService 处理 group 广播数据
func (manager *Manager) SendGroupService() {
	for {
		select {
		// 发送广播数据到某个组的 channel 变量 Send 中
		case data := <-manager.GroupMessage:
			if groupMap, ok := manager.Group[data.Group]; ok {
				for _, conn := range groupMap {
					conn.Message <- data.Message
				}
			}
		}
	}
}

// SendAllService 处理广播数据
func (manager *Manager) SendAllService() {
	for {
		select {
		case data := <-manager.BroadCastMessage:
			for _, v := range manager.Group {
				for _, conn := range v {
					conn.Message <- data.Message
				}
			}
		}
	}
}

// Send 向指定的 client 发送数据
func (manager *Manager) Send(id string, group string, message []byte) {
	data := &MessageData{
		Id:      id,
		Group:   group,
		Message: message,
	}
	manager.Message <- data
}

// SendGroup 向指定的 Group 广播
func (manager *Manager) SendGroup(group string, message []byte) {
	data := &GroupMessageData{
		Group:   group,
		Message: message,
	}
	manager.GroupMessage <- data
}

// SendAll 广播
func (manager *Manager) SendAll(message []byte) {
	data := &BroadCastMessageData{
		Message: message,
	}
	manager.BroadCastMessage <- data
}

// RegisterClient 注册
func (manager *Manager) RegisterClient(client *Client, callback func(messageType int, message []byte)) {
	manager.Register <- client
	// 处理读操作
	go client.Read(callback)
	// 处理写操作
	go client.Write()
}

// UnRegisterClient 注销
func (manager *Manager) UnRegisterClient(client *Client) {
	manager.UnRegister <- client
}

// LenGroup 当前组个数
func (manager *Manager) LenGroup() uint {
	return manager.groupCount
}

// LenClient 当前连接个数
func (manager *Manager) LenClient() uint {
	return manager.clientCount
}

// Info 获取 wsManager 管理器信息
func (manager *Manager) Info() map[string]interface{} {
	managerInfo := make(map[string]interface{})
	managerInfo["groupLen"] = manager.LenGroup()
	managerInfo["clientLen"] = manager.LenClient()
	managerInfo["chanRegisterLen"] = len(manager.Register)
	managerInfo["chanUnregisterLen"] = len(manager.UnRegister)
	managerInfo["chanMessageLen"] = len(manager.Message)
	managerInfo["chanGroupMessageLen"] = len(manager.GroupMessage)
	managerInfo["chanBroadCastMessageLen"] = len(manager.BroadCastMessage)
	return managerInfo
}

// WebsocketManager 初始化 wsManager 管理器
var WebsocketManager = Manager{
	Group:            make(map[string]map[string]*Client),
	Register:         make(chan *Client, 128),
	UnRegister:       make(chan *Client, 128),
	GroupMessage:     make(chan *GroupMessageData, 128),
	Message:          make(chan *MessageData, 128),
	BroadCastMessage: make(chan *BroadCastMessageData, 128),
	groupCount:       0,
	clientCount:      0,
}