mirror of https://github.com/status-im/op-geth.git
123 lines
2.0 KiB
Go
123 lines
2.0 KiB
Go
package websocket
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import (
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"fmt"
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"io"
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ws "code.google.com/p/go.net/websocket"
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)
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const channelBufSize = 100
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var maxId int = 0
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type MsgFunc func(c *Client, msg *Message)
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// Chat client.
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type Client struct {
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id int
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ws *ws.Conn
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server *Server
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ch chan *Message
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doneCh chan bool
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onMessage MsgFunc
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}
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// Create new chat client.
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func NewClient(ws *ws.Conn, server *Server) *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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if server == nil {
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panic("server cannot be nil")
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}
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maxId++
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ch := make(chan *Message, channelBufSize)
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doneCh := make(chan bool)
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return &Client{maxId, ws, server, ch, doneCh, nil}
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}
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func (c *Client) Id() int {
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return c.id
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}
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func (c *Client) Conn() *ws.Conn {
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return c.ws
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}
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func (c *Client) Write(data interface{}, seed int) {
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msg := &Message{Seed: seed, Data: data}
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select {
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case c.ch <- msg:
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default:
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c.server.Del(c)
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err := fmt.Errorf("client %d is disconnected.", c.id)
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c.server.Err(err)
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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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// 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.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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logger.Debugln("Listening write to client")
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for {
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select {
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// send message to the client
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case msg := <-c.ch:
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logger.Debugln("Send:", msg)
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ws.JSON.Send(c.ws, msg)
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// receive done request
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case <-c.doneCh:
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c.server.Del(c)
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c.doneCh <- true // for listenRead method
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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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logger.Debugln("Listening read from client")
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for {
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select {
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// receive done request
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case <-c.doneCh:
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c.server.Del(c)
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c.doneCh <- true // for listenWrite method
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return
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// read data from ws connection
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default:
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var msg Message
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err := ws.JSON.Receive(c.ws, &msg)
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if err == io.EOF {
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c.doneCh <- true
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} else if err != nil {
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c.server.Err(err)
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} else {
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logger.Debugln(&msg)
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if c.onMessage != nil {
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c.onMessage(c, &msg)
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}
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}
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}
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}
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}
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