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large refactor, fixes #2

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This commit is contained in:
Craig
2020-01-18 23:30:09 +00:00
parent 2729c66ccc
commit 7aa034f3ba
59 changed files with 2766 additions and 1345 deletions
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205
server/internal/websocket/handler.go Normal file
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package websocket
import (
"fmt"
"net/http"
"time"
"github.com/gorilla/websocket"
gonanoid "github.com/matoous/go-nanoid"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"n.eko.moe/neko/internal/config"
"n.eko.moe/neko/internal/session"
"n.eko.moe/neko/internal/webrtc"
)
func New(sessions *session.SessionManager, webrtc *webrtc.WebRTCManager, conf *config.WebSocket) *WebSocketHandler {
logger := log.With().Str("module", "websocket").Logger()
return &WebSocketHandler{
logger: logger,
conf: conf,
sessions: sessions,
upgrader: websocket.Upgrader{
CheckOrigin: func(r *http.Request) bool {
return true
},
},
handler: &MessageHandler{
logger: logger.With().Str("subsystem", "handler").Logger(),
sessions: sessions,
webrtc: webrtc,
},
}
}
// Send pings to peer with this period. Must be less than pongWait.
const pingPeriod = 60 * time.Second
const alphabet = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
type WebSocketHandler struct {
logger zerolog.Logger
upgrader websocket.Upgrader
handler *MessageHandler
conf *config.WebSocket
sessions *session.SessionManager
shutdown chan bool
}
func (ws *WebSocketHandler) Start() error {
go func() {
defer func() {
ws.logger.Info().Msg("shutdown")
}()
for {
select {
case <-ws.shutdown:
return
}
}
}()
ws.sessions.OnCreated(func(id string, session *session.Session) {
if err := ws.handler.Created(id, session); err != nil {
ws.logger.Warn().Str("id", id).Err(err).Msg("session created with and error")
} else {
ws.logger.Debug().Str("id", id).Msg("session created")
}
})
ws.sessions.OnDestroy(func(id string) {
if err := ws.handler.Destroyed(id); err != nil {
ws.logger.Warn().Str("id", id).Err(err).Msg("session destroyed with and error")
} else {
ws.logger.Debug().Str("id", id).Msg("session destroyed")
}
})
return nil
}
func (ws *WebSocketHandler) Shutdown() error {
ws.shutdown <- true
return nil
}
func (ws *WebSocketHandler) Upgrade(w http.ResponseWriter, r *http.Request) error {
ws.logger.Debug().Msg("attempting to upgrade connection")
socket, err := ws.upgrader.Upgrade(w, r, nil)
if err != nil {
ws.logger.Error().Err(err).Msg("failed to upgrade connection")
return err
}
id, admin, err := ws.authenticate(r)
if err != nil {
ws.logger.Warn().Err(err).Msg("authenticatetion failed")
if err = socket.Close(); err != nil {
return err
}
return nil
}
ws.sessions.New(id, admin, socket)
ws.logger.
Debug().
Str("session", id).
Str("address", socket.RemoteAddr().String()).
Msg("new connection created")
defer func() {
ws.logger.
Debug().
Str("session", id).
Str("address", socket.RemoteAddr().String()).
Msg("session ended")
}()
if err = ws.handler.Connected(id, socket); err != nil {
ws.logger.Error().Err(err).Msg("connection failed")
if err = socket.Close(); err != nil {
return err
}
return nil
}
ws.handle(socket, id)
return nil
}
func (ws *WebSocketHandler) authenticate(r *http.Request) (string, bool, error) {
id, err := gonanoid.Generate(alphabet, 32)
if err != nil {
return "", false, err
}
passwords, ok := r.URL.Query()["password"]
if !ok || len(passwords[0]) < 1 {
return "", false, fmt.Errorf("no password provided")
}
if passwords[0] == ws.conf.AdminPassword {
return id, true, nil
}
if passwords[0] == ws.conf.Password {
return id, false, nil
}
return "", false, fmt.Errorf("invalid password: %s", passwords[0])
}
func (ws *WebSocketHandler) handle(socket *websocket.Conn, id string) {
bytes := make(chan []byte)
cancel := make(chan struct{})
ticker := time.NewTicker(pingPeriod)
go func() {
defer func() {
ticker.Stop()
ws.logger.Debug().Str("address", socket.RemoteAddr().String()).Msg("handle socket ending")
ws.handler.Disconnected(id)
}()
for {
_, raw, err := socket.ReadMessage()
if err != nil {
if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
ws.logger.Warn().Err(err).Msg("read message error")
} else {
ws.logger.Debug().Err(err).Msg("read message error")
}
close(cancel)
break
}
bytes <- raw
}
}()
for {
select {
case raw := <-bytes:
ws.logger.Debug().
Str("session", id).
Str("raw", string(raw)).
Msg("recieved message from client")
if err := ws.handler.Message(id, raw); err != nil {
ws.logger.Error().Err(err).Msg("message handler has failed")
return
}
case <-cancel:
return
case _ = <-ticker.C:
if err := socket.WriteMessage(websocket.PingMessage, nil); err != nil {
return
}
}
}
}

131
server/internal/websocket/messages.go Normal file
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package websocket
import (
"encoding/json"
"github.com/gorilla/websocket"
"github.com/pkg/errors"
"github.com/rs/zerolog"
"n.eko.moe/neko/internal/event"
"n.eko.moe/neko/internal/message"
"n.eko.moe/neko/internal/session"
"n.eko.moe/neko/internal/utils"
"n.eko.moe/neko/internal/webrtc"
)
type MessageHandler struct {
logger zerolog.Logger
sessions *session.SessionManager
webrtc *webrtc.WebRTCManager
}
func (h *MessageHandler) Connected(id string, socket *websocket.Conn) error {
return nil
}
func (h *MessageHandler) Disconnected(id string) error {
return h.sessions.Destroy(id)
}
func (h *MessageHandler) Created(id string, session *session.Session) error {
if err := session.Send(message.IdentityProvide{
Message: message.Message{Event: event.IDENTITY_PROVIDE},
ID: id,
}); err != nil {
return err
}
return nil
}
func (h *MessageHandler) Destroyed(id string) error {
if h.sessions.IsHost(id) {
h.sessions.ClearHost()
if err := h.sessions.Brodcast(message.Message{Event: event.CONTROL_RELEASED}, []string{id}); err != nil {
h.logger.Warn().Err(err).Msgf("brodcasting event %s has failed", event.CONTROL_RELEASED)
}
}
return nil
}
func (h *MessageHandler) Message(id string, raw []byte) error {
header := message.Message{}
if err := json.Unmarshal(raw, &header); err != nil {
return err
}
session, ok := h.sessions.Get(id)
if !ok {
errors.Errorf("unknown session id %s", id)
}
switch header.Event {
case event.SDP_PROVIDE:
payload := message.SDP{}
return errors.Wrapf(utils.Unmarshal(&payload, raw, func() error { return h.webrtc.CreatePeer(id, payload.SDP) }), "%s failed", header.Event)
case event.CONTROL_RELEASE:
return errors.Wrapf(h.controlRelease(id, session), "%s failed", header.Event)
case event.CONTROL_REQUEST:
return errors.Wrapf(h.controlRequest(id, session), "%s failed", header.Event)
default:
return errors.Errorf("unknown message event %s", header.Event)
}
}
func (h *MessageHandler) controlRelease(id string, session *session.Session) error {
if !h.sessions.IsHost(id) {
return nil
}
h.logger.Debug().Str("id", id).Msgf("host called %s", event.CONTROL_RELEASED)
h.sessions.ClearHost()
if err := session.Send(message.Message{Event: event.CONTROL_RELEASE}); err != nil {
h.logger.Warn().Err(err).Str("id", id).Msgf("sending event %s has failed", event.CONTROL_RELEASE)
return err
}
if err := h.sessions.Brodcast(message.Message{Event: event.CONTROL_RELEASED}, []string{session.ID}); err != nil {
h.logger.Warn().Err(err).Msgf("brodcasting event %s has failed", event.CONTROL_RELEASED)
return err
}
return nil
}
func (h *MessageHandler) controlRequest(id string, session *session.Session) error {
h.logger.Debug().Str("id", id).Msgf("user called %s", event.CONTROL_REQUEST)
if !h.sessions.HasHost() {
h.sessions.SetHost(id)
if err := session.Send(message.Message{Event: event.CONTROL_GIVE}); err != nil {
h.logger.Warn().Err(err).Str("id", id).Msgf("sending event %s has failed", event.CONTROL_GIVE)
return err
}
if err := h.sessions.Brodcast(message.Message{Event: event.CONTROL_GIVEN}, []string{session.ID}); err != nil {
h.logger.Warn().Err(err).Msgf("brodcasting event %s has failed", event.CONTROL_GIVEN)
return err
}
return nil
}
if err := session.Send(message.Message{Event: event.CONTROL_LOCKED}); err != nil {
h.logger.Warn().Err(err).Str("id", id).Msgf("sending event %s has failed", event.CONTROL_LOCKED)
return err
}
host, ok := h.sessions.GetHost()
if ok {
if err := host.Send(message.Message{Event: event.CONTROL_REQUESTING}); err != nil {
h.logger.Warn().Err(err).Str("id", id).Msgf("sending event %s has failed", event.CONTROL_REQUESTING)
return err
}
}
return nil
}