107 lines
1.8 KiB
Go
107 lines
1.8 KiB
Go
package websocket
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import (
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"io"
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"golang.org/x/net/websocket"
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"github.com/FreifunkBremen/freifunkmanager/lib/log"
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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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doneCh chan bool
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}
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func disconnect(c *Client) {
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delete(clients, c.ip)
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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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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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doneCh: 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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disconnect(c)
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log.HTTP(c.ws.Request()).Error("client is disconnected.")
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}
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}
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func (c *Client) Done() {
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c.doneCh <- true
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}
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func (c *Client) allNodes() {
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for _, node := range nodes.List {
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c.Write(&Message{State: StateCurrentNode, Node: node})
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}
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for _, node := range nodes.ToUpdate {
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c.Write(&Message{State: StateUpdateNode, Node: node})
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}
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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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c.allNodes()
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c.listenRead()
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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.doneCh:
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disconnect(c)
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c.doneCh <- true
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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.doneCh:
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disconnect(c)
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c.doneCh <- true
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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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log.HTTP(c.ws.Request()).Info("disconnect")
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c.doneCh <- true
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} else if err != nil {
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log.HTTP(c.ws.Request()).Error(err)
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} else {
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log.HTTP(c.ws.Request()).Info("recieve nodeupdate")
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nodes.UpdateNode(msg.Node)
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}
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}
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}
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}
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