/
client.go
172 lines (141 loc) · 3.69 KB
/
client.go
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package websocket
import (
"encoding/json"
"log"
"math/rand"
"net/http"
"strconv"
"time"
"github.com/gorilla/websocket"
"github.com/iKonrad/typitap/server/entities"
"github.com/iKonrad/typitap/server/services/logs"
"github.com/iKonrad/typitap/server/services/user"
"github.com/iKonrad/typitap/server/services/utils"
"github.com/labstack/echo"
)
const (
WRITE_WAIT = 10 * time.Second
PONG_WAIT = 60 * time.Second
PING_PERIOD = (PONG_WAIT * 9) / 10
MAX_MESSAGE_SIZE = 1024 * 1024
)
type Client struct {
user *entities.User
identifier string
ws *websocket.Conn
send chan []byte
ip string
country string
}
var upgrader websocket.Upgrader
func init() {
upgrader = websocket.Upgrader{
ReadBufferSize: MAX_MESSAGE_SIZE,
WriteBufferSize: MAX_MESSAGE_SIZE,
CheckOrigin: func(r *http.Request) bool {
return true
},
}
}
func ServeWs(context echo.Context) {
if context.Request().Method != "GET" {
http.Error(context.Response().Writer, "Method not allowed", http.StatusMethodNotAllowed)
return
}
ws, err := upgrader.Upgrade(context.Response().Writer, context.Request(), nil)
if err != nil {
logs.Error("Websocket error", "Error while upgrading a request: "+err.Error(), []string{"websocket"}, "Websocket error")
return
}
// Check if user exists. If exists, use username as a identifier. Otherwise, create a guest ID
var identifier string
var newUser entities.User
if context.Get("IsLoggedIn").(bool) {
newUser := context.Get("User").(entities.User)
identifier = newUser.Username
} else {
randomNumber := rand.Int()
identifier = "guest-" + strconv.Itoa(randomNumber)
}
ip := utils.GetIPAdress(context.Request())
country, _ := user.GetCountryCodeByIP(ip)
c := &Client{
user: &newUser,
identifier: identifier,
send: make(chan []byte, MAX_MESSAGE_SIZE),
ws: ws,
ip: ip,
country: country,
}
hub.registerChannel <- c
c.SendMessage(TYPE_CONNECTED, map[string]interface{}{
"identifier": identifier,
})
go c.writePump()
c.readPump()
}
func (c *Client) readPump() {
defer func() {
hub.unregisterChannel <- c
c.ws.Close()
}()
c.ws.SetReadLimit(MAX_MESSAGE_SIZE)
c.ws.SetReadDeadline(time.Now().Add(PONG_WAIT))
c.ws.SetPongHandler(func(string) error {
c.ws.SetReadDeadline(time.Now().Add(PONG_WAIT))
return nil
})
for {
_, message, err := c.ws.ReadMessage()
if err != nil {
break
}
var decodedMessage map[string]interface{}
json.Unmarshal(message, &decodedMessage)
c.parseMessage(c.identifier, decodedMessage)
}
}
func (c *Client) parseMessage(identifier string, message map[string]interface{}) {
GetEngine().parseMessage(c, message)
}
func (c *Client) writePump() {
ticker := time.NewTicker(PING_PERIOD)
defer func() {
ticker.Stop()
c.ws.Close()
}()
for {
select {
case message, ok := <-c.send:
logs.Incr("socketMessages", []string{"websocket"})
if !ok {
c.write(websocket.CloseMessage, []byte{})
return
}
if err := c.write(websocket.TextMessage, message); err != nil {
return
}
case <-ticker.C:
logs.Incr("socketMessages", []string{"websocket"})
if err := c.write(websocket.PingMessage, []byte{}); err != nil {
return
}
}
}
}
func (c *Client) write(mt int, message []byte) error {
c.ws.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
return c.ws.WriteMessage(mt, message)
}
func (c *Client) SendMessage(messageType string, message interface{}) {
messageObject := map[string]interface{}{
"type": messageType,
"data": message,
}
encoded, err := json.Marshal(messageObject)
if err != nil {
log.Println("Error while encoding a payload")
}
logs.Incr("socketMessages", []string{"websocket"})
c.send <- encoded
}