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// client.go
package main
import (
"encoding/json"
"log"
"time"
"unicode/utf8"
"github.com/gorilla/websocket"
)
type Client struct {
hub *Hub
conn *websocket.Conn
send chan []byte
token *TokenConfig
nick string
serverID string
playerUUID string
lastSeen time.Time
}
func (c *Client) readPump() {
defer func() {
c.hub.unregister(c)
c.conn.Close()
}()
c.conn.SetReadLimit(4096)
c.conn.SetReadDeadline(time.Now().Add(60 * time.Second))
c.conn.SetPongHandler(func(string) error {
c.conn.SetReadDeadline(time.Now().Add(60 * time.Second))
return nil
})
for {
_, data, err := c.conn.ReadMessage()
if err != nil {
break
}
var msg IncomingMessage
if err := json.Unmarshal(data, &msg); err != nil {
log.Printf("invalid json from client: %v", err)
continue
}
switch msg.Type {
case "chat":
c.handleChat(msg)
case "location":
c.handleLocation(msg)
case "nick":
c.handleNick(msg)
default:
log.Printf("unknown message type: %s", msg.Type)
}
}
}
func (c *Client) writePump() {
ticker := time.NewTicker(30 * time.Second)
defer func() {
ticker.Stop()
c.conn.Close()
}()
for {
select {
case msg, ok := <-c.send:
c.conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
if !ok {
// hub closed the channel
c.conn.WriteMessage(websocket.CloseMessage, []byte{})
return
}
if err := c.conn.WriteMessage(websocket.TextMessage, msg); err != nil {
return
}
case <-ticker.C:
// ping to keep connection alive
c.conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
if err := c.conn.WriteMessage(websocket.PingMessage, nil); err != nil {
return
}
}
}
}
func (c *Client) handleChat(msg IncomingMessage) {
if msg.Message == "" {
return
}
if utf8.RuneCountInString(msg.Message) > maxMessageLen {
log.Printf("dropping too-long chat message from %s (%s)", c.nick, c.token.Name)
return
}
ts := time.Now().Unix()
out := OutChat{
Type: "chat",
FromNick: c.nick,
FromInternal: c.token.Name,
Message: msg.Message,
Timestamp: ts,
}
data, _ := json.Marshal(out)
// log event
c.hub.addEvent(Event{
Type: "chat",
Timestamp: ts,
FromNick: c.nick,
FromInternal: c.token.Name,
Message: msg.Message,
})
// GLOBAL broadcast
c.hub.broadcastAll(data)
}
func (c *Client) handleLocation(msg IncomingMessage) {
ts := time.Now().Unix()
out := OutLocation{
Type: "location",
Nick: c.nick,
Internal: c.token.Name,
ServerID: c.serverID,
X: msg.X,
Y: msg.Y,
Z: msg.Z,
Dimension: msg.Dimension,
Timestamp: ts,
}
data, _ := json.Marshal(out)
// log event
c.hub.addEvent(Event{
Type: "location",
Timestamp: ts,
FromNick: c.nick,
FromInternal: c.token.Name,
ServerID: c.serverID,
X: msg.X,
Y: msg.Y,
Z: msg.Z,
Dimension: msg.Dimension,
})
// broadcast only to same server
c.hub.broadcastToServer(c.serverID, data)
}
func (c *Client) handleNick(msg IncomingMessage) {
if msg.Nick == "" {
return
}
if utf8.RuneCountInString(msg.Nick) > maxNickLen {
log.Printf("rejecting nick > %d chars from %s (%s)", maxNickLen, c.nick, c.token.Name)
return
}
c.hub.mu.Lock()
c.nick = msg.Nick
c.hub.mu.Unlock()
}
|
