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// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package api
import (
l4g "code.google.com/p/log4go"
"github.com/gorilla/websocket"
"github.com/mattermost/platform/model"
"github.com/mattermost/platform/store"
"time"
)
const (
WRITE_WAIT = 10 * time.Second
PONG_WAIT = 60 * time.Second
PING_PERIOD = (PONG_WAIT * 9) / 10
MAX_SIZE = 512
REDIS_WAIT = 60 * time.Second
)
type WebConn struct {
WebSocket *websocket.Conn
Send chan *model.Message
TeamId string
UserId string
ChannelAccessCache map[string]bool
}
func NewWebConn(ws *websocket.Conn, teamId string, userId string, sessionId string) *WebConn {
go func() {
achan := Srv.Store.User().UpdateUserAndSessionActivity(userId, sessionId, model.GetMillis())
pchan := Srv.Store.User().UpdateLastPingAt(userId, model.GetMillis())
if result := <-achan; result.Err != nil {
l4g.Error("Failed to update LastActivityAt for user_id=%v and session_id=%v, err=%v", userId, sessionId, result.Err)
}
if result := <-pchan; result.Err != nil {
l4g.Error("Failed to updated LastPingAt for user_id=%v, err=%v", userId, result.Err)
}
}()
return &WebConn{Send: make(chan *model.Message, 64), WebSocket: ws, UserId: userId, TeamId: teamId, ChannelAccessCache: make(map[string]bool)}
}
func (c *WebConn) readPump() {
defer func() {
hub.Unregister(c)
c.WebSocket.Close()
}()
c.WebSocket.SetReadLimit(MAX_SIZE)
c.WebSocket.SetReadDeadline(time.Now().Add(PONG_WAIT))
c.WebSocket.SetPongHandler(func(string) error {
c.WebSocket.SetReadDeadline(time.Now().Add(PONG_WAIT))
go func() {
if result := <-Srv.Store.User().UpdateLastPingAt(c.UserId, model.GetMillis()); result.Err != nil {
l4g.Error("Failed to updated LastPingAt for user_id=%v, err=%v", c.UserId, result.Err)
}
}()
return nil
})
for {
var msg model.Message
if err := c.WebSocket.ReadJSON(&msg); err != nil {
return
} else {
msg.TeamId = c.TeamId
msg.UserId = c.UserId
PublishAndForget(&msg)
}
}
}
func (c *WebConn) writePump() {
ticker := time.NewTicker(PING_PERIOD)
defer func() {
ticker.Stop()
c.WebSocket.Close()
}()
for {
select {
case msg, ok := <-c.Send:
if !ok {
c.WebSocket.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
c.WebSocket.WriteMessage(websocket.CloseMessage, []byte{})
return
}
if len(msg.ChannelId) > 0 {
allowed, ok := c.ChannelAccessCache[msg.ChannelId]
if !ok {
allowed = hasPermissionsToChannel(Srv.Store.Channel().CheckPermissionsTo(c.TeamId, msg.ChannelId, c.UserId))
c.ChannelAccessCache[msg.ChannelId] = allowed
}
if allowed {
c.WebSocket.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
if err := c.WebSocket.WriteJSON(msg); err != nil {
return
}
}
} else {
c.WebSocket.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
if err := c.WebSocket.WriteJSON(msg); err != nil {
return
}
}
case <-ticker.C:
c.WebSocket.SetWriteDeadline(time.Now().Add(WRITE_WAIT))
if err := c.WebSocket.WriteMessage(websocket.PingMessage, []byte{}); err != nil {
return
}
}
}
}
func (c *WebConn) updateChannelAccessCache(channelId string) {
allowed := hasPermissionsToChannel(Srv.Store.Channel().CheckPermissionsTo(c.TeamId, channelId, c.UserId))
c.ChannelAccessCache[channelId] = allowed
}
func hasPermissionsToChannel(sc store.StoreChannel) bool {
if cresult := <-sc; cresult.Err != nil {
return false
} else if cresult.Data.(int64) != 1 {
return false
}
return true
}
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