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/
server.go
133 lines (113 loc) · 2.97 KB
/
server.go
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package server
import (
"log"
"net/http"
"fmt"
"github.com/go-chi/chi"
"github.com/go-chi/chi/middleware"
"github.com/gorilla/websocket"
"github.com/horizon-games/arcadeum/server/config"
"github.com/horizon-games/arcadeum/server/matcher"
)
type Server struct {
Matcher *matcher.Service
}
type MessageRequest struct {
PlayerConn *websocket.Conn // sender
*matcher.Message
}
var relay = make(chan *MessageRequest)
var upgrader = websocket.Upgrader{
CheckOrigin: func(r *http.Request) bool {
return true // allow cross origin connections
},
}
func New(cfg *config.Config) (*Server, error) {
return &Server{
Matcher: matcher.NewService(
&cfg.ENV,
&cfg.MatcherConfig,
&cfg.ETHConfig,
&cfg.ArcadeumConfig,
&cfg.RedisConfig),
}, nil
}
func (s *Server) Start() error {
r := chi.NewRouter()
r.Use(middleware.RequestID)
r.Use(middleware.Logger)
r.Use(middleware.Heartbeat("/ping"))
r.Use(middleware.Recoverer)
r.Get("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`¯\_(ツ)_/¯`))
})
// Configure websocket route
r.With(matcher.AddTokenContext).HandleFunc("/ws", s.HandleConnections)
go s.HandleMessages()
go s.Matcher.HandleMatchResponses()
// Start the server on localhost
log.Printf("ARCADEUM Server started :%d; connect at /ws", s.Matcher.ENV.Port)
if s.Matcher.ENV.TLSEnabled {
return http.ListenAndServeTLS(fmt.Sprintf(":%d", s.Matcher.ENV.Port),
s.Matcher.ENV.TLSCertFile, s.Matcher.ENV.TLSKeyFile, r)
} else {
return http.ListenAndServe(fmt.Sprintf(":%d", s.Matcher.ENV.Port), r)
}
return nil
}
func (s *Server) HandleMessages() {
for {
msg := <-relay
err := s.Matcher.OnMessage(msg.Message)
if err != nil {
msg.PlayerConn.WriteJSON(matcher.NewError(err.Error()))
}
}
}
func (s *Server) HandleConnections(w http.ResponseWriter, r *http.Request) {
log.Println("Opening WS connection")
ws, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.Fatal(err)
}
go func() {
defer ws.Close()
s.FindMatch(matcher.Context(r), ws)
for {
var msg matcher.Message
err := ws.ReadJSON(&msg)
if err != nil {
log.Printf("error: %v", err)
if websocket.IsCloseError(err, 1001) {
break
}
if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
break
}
log.Printf("client is gone")
return
} else {
relay <- &MessageRequest{PlayerConn: ws, Message: &msg}
}
}
}()
}
func (s *Server) FindMatch(token *matcher.Token, conn *websocket.Conn) {
channel := make(chan *matcher.Message)
s.Matcher.SubscribeToSubKey(token.SubKey, channel)
go OnMessage(conn, channel)
go s.Matcher.FindMatch(token)
}
func OnMessage(ws *websocket.Conn, messages chan *matcher.Message) {
for {
msg := <-messages
log.Printf("GOT PUBLISHED MESSAGE, sending to client: %v", msg)
err := ws.WriteJSON(msg)
if err != nil {
log.Printf("Error sending message to client over websocket %v", err.Error())
}
if msg.Code == matcher.TERMINATE {
break
}
}
}