124 lines
2.1 KiB
Go
124 lines
2.1 KiB
Go
package websocket
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import (
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"io"
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log "github.com/sirupsen/logrus"
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"golang.org/x/net/websocket"
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)
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const channelBufSize = 100
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type Client struct {
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ip string
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ws *websocket.Conn
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ch chan *Message
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writeQuit chan bool
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readQuit chan bool
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}
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func NewClient(ip string, ws *websocket.Conn) *Client {
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if ws == nil {
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log.Panic("ws cannot be nil")
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}
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return &Client{
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ws: ws,
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ch: make(chan *Message, channelBufSize),
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writeQuit: make(chan bool),
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readQuit: make(chan bool),
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ip: ip,
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}
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}
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func (c *Client) Write(msg *Message) {
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select {
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case c.ch <- msg:
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default:
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clientsMutex.Lock()
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delete(clients, c.ip)
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clientsMutex.Unlock()
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log.Error("client disconnected")
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}
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}
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func (c *Client) Close() {
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c.writeQuit <- true
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c.readQuit <- true
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log.Info("client disconnecting...")
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}
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// Listen Write and Read request via chanel
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func (c *Client) Listen() {
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go c.listenWrite()
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if stats != nil {
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c.Write(&Message{Type: MessageTypeStats, Body: stats})
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}
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c.publishAllData()
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c.listenRead()
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}
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func (c *Client) publishAllData() {
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for _, node := range nodes.List {
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c.Write(&Message{Type: MessageTypeSystemNode, Node: node})
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}
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for _, node := range nodes.Current {
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c.Write(&Message{Type: MessageTypeCurrentNode, Node: node})
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}
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}
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func (c *Client) handleMessage(msg *Message) {
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switch msg.Type {
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case MessageTypeSystemNode:
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nodes.UpdateNode(msg.Node)
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break
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}
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}
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// Listen write request via chanel
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func (c *Client) listenWrite() {
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for {
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select {
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case msg := <-c.ch:
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websocket.JSON.Send(c.ws, msg)
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case <-c.writeQuit:
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clientsMutex.Lock()
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close(c.ch)
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close(c.writeQuit)
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delete(clients, c.ip)
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clientsMutex.Unlock()
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return
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}
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}
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}
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// Listen read request via chanel
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func (c *Client) listenRead() {
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for {
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select {
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case <-c.readQuit:
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clientsMutex.Lock()
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close(c.readQuit)
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delete(clients, c.ip)
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clientsMutex.Unlock()
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return
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default:
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var msg Message
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err := websocket.JSON.Receive(c.ws, &msg)
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if err == io.EOF {
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close(c.readQuit)
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c.writeQuit <- true
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return
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} else if err != nil {
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log.Error(err)
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} else {
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c.handleMessage(&msg)
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}
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}
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}
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}
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