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a0d5120 Dec 8, 2015
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@tenntenn @mattn
112 lines (91 sloc) 1.81 KB
package chat
import (
"fmt"
"io"
"log"
"golang.org/x/net/websocket"
)
const channelBufSize = 100
var maxId int = 0
// Chat client.
type Client struct {
id int
ws *websocket.Conn
server *Server
ch chan *Message
doneCh chan bool
}
// Create new chat client.
func NewClient(ws *websocket.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}
}
func (c *Client) Conn() *websocket.Conn {
return c.ws
}
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() {
log.Println("Listening write to client")
for {
select {
// send message to the client
case msg := <-c.ch:
log.Println("Send:", msg)
websocket.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() {
log.Println("Listening read from client")
for {
select {
// receive done request
case <-c.doneCh:
c.server.Del(c)
c.doneCh <- true // for listenWrite method
return
// read data from websocket connection
default:
var msg Message
err := websocket.JSON.Receive(c.ws, &msg)
if err == io.EOF {
c.doneCh <- true
} else if err != nil {
c.server.Err(err)
} else {
c.server.SendAll(&msg)
}
}
}
}