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|
package websocket
import (
"fmt"
"io"
ws "code.google.com/p/go.net/websocket"
)
const channelBufSize = 100
var maxId int = 0
type MsgFunc func(c *Client, msg *Message)
// Chat client.
type Client struct {
id int
ws *ws.Conn
server *Server
ch chan *Message
doneCh chan bool
onMessage MsgFunc
}
// Create new chat client.
func NewClient(ws *ws.Conn, server *Server) *Client {
if ws == nil {
panic("ws cannot be nil")
}
if server == nil {
panic("server cannot be nil")
}
maxId++
ch := make(chan *Message, channelBufSize)
doneCh := make(chan bool)
return &Client{maxId, ws, server, ch, doneCh, nil}
}
func (c *Client) Id() int {
return c.id
}
func (c *Client) Conn() *ws.Conn {
return c.ws
}
func (c *Client) Write(data interface{}, id int) {
c.write(&Message{Id: id, Data: data})
}
func (c *Client) Event(data interface{}, ev string, id int) {
c.write(&Message{Id: id, Data: data, Event: ev})
}
func (c *Client) write(msg *Message) {
select {
case c.ch <- msg:
default:
c.server.Del(c)
err := fmt.Errorf("client %d is disconnected.", c.id)
c.server.Err(err)
}
}
func (c *Client) Done() {
c.doneCh <- true
}
// Listen Write and Read request via chanel
func (c *Client) Listen() {
go c.listenWrite()
c.listenRead()
}
// Listen write request via chanel
func (c *Client) listenWrite() {
for {
select {
// send message to the client
case msg := <-c.ch:
wslogger.Debugln("Send:", msg)
ws.JSON.Send(c.ws, msg)
// receive done request
case <-c.doneCh:
c.server.Del(c)
c.doneCh <- true // for listenRead method
return
}
}
}
// Listen read request via chanel
func (c *Client) listenRead() {
for {
select {
// receive done request
case <-c.doneCh:
c.server.Del(c)
c.doneCh <- true // for listenWrite method
return
// read data from ws connection
default:
var msg Message
err := ws.JSON.Receive(c.ws, &msg)
if err == io.EOF {
c.doneCh <- true
} else if err != nil {
c.server.Err(err)
} else {
wslogger.Debugln(&msg)
if c.onMessage != nil {
c.onMessage(c, &msg)
}
}
}
}
}
|
