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// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package api
import (
"time"
"github.com/mattermost/platform/model"
"github.com/gorilla/websocket"
goi18n "github.com/nicksnyder/go-i18n/i18n"
)
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.WebSocketMessage
SessionToken string
UserId string
T goi18n.TranslateFunc
Locale string
hasPermissionsToChannel map[string]bool
hasPermissionsToTeam map[string]bool
}
func NewWebConn(c *Context, ws *websocket.Conn) *WebConn {
go SetStatusOnline(c.Session.UserId, c.Session.Id, false)
return &WebConn{
Send: make(chan model.WebSocketMessage, 64),
WebSocket: ws,
UserId: c.Session.UserId,
SessionToken: c.Session.Token,
T: c.T,
Locale: c.Locale,
hasPermissionsToChannel: make(map[string]bool),
hasPermissionsToTeam: 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 SetStatusAwayIfNeeded(c.UserId, false)
return nil
})
for {
var req model.WebSocketRequest
if err := c.WebSocket.ReadJSON(&req); err != nil {
return
} else {
BaseRoutes.WebSocket.ServeWebSocket(c, &req)
}
}
}
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
}
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) InvalidateCache() {
c.hasPermissionsToChannel = make(map[string]bool)
c.hasPermissionsToTeam = make(map[string]bool)
}
func (c *WebConn) InvalidateCacheForChannel(channelId string) {
delete(c.hasPermissionsToChannel, channelId)
}
func (c *WebConn) HasPermissionsToTeam(teamId string) bool {
perm, ok := c.hasPermissionsToTeam[teamId]
if !ok {
session := GetSession(c.SessionToken)
if session == nil {
perm = false
c.hasPermissionsToTeam[teamId] = perm
} else {
member := session.GetTeamByTeamId(teamId)
if member != nil {
perm = true
c.hasPermissionsToTeam[teamId] = perm
} else {
perm = true
c.hasPermissionsToTeam[teamId] = perm
}
}
}
return perm
}
func (c *WebConn) HasPermissionsToChannel(channelId string) bool {
perm, ok := c.hasPermissionsToChannel[channelId]
if !ok {
if cresult := <-Srv.Store.Channel().CheckPermissionsToNoTeam(channelId, c.UserId); cresult.Err != nil {
perm = false
c.hasPermissionsToChannel[channelId] = perm
} else {
count := cresult.Data.(int64)
if count == 1 {
perm = true
c.hasPermissionsToChannel[channelId] = perm
} else {
perm = false
c.hasPermissionsToChannel[channelId] = perm
}
}
}
return perm
}
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