440 lines
11 KiB
Go
440 lines
11 KiB
Go
// +build !no_ws
|
|
|
|
/*
|
|
*
|
|
* Gosora WebSocket Subsystem
|
|
* Copyright Azareal 2017 - 2018
|
|
*
|
|
*/
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"net/http"
|
|
"runtime"
|
|
"strconv"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/Azareal/gopsutil/cpu"
|
|
"github.com/Azareal/gopsutil/mem"
|
|
"github.com/gorilla/websocket"
|
|
)
|
|
|
|
type WSUser struct {
|
|
conn *websocket.Conn
|
|
User *User
|
|
}
|
|
|
|
type WSHub struct {
|
|
onlineUsers map[int]*WSUser
|
|
onlineGuests map[*WSUser]bool
|
|
guests sync.RWMutex
|
|
users sync.RWMutex
|
|
}
|
|
|
|
// TODO: Disable WebSockets on high load? Add a Control Panel interface for disabling it?
|
|
var enableWebsockets = true // Put this in caps for consistency with the other constants?
|
|
|
|
var wsHub WSHub
|
|
var wsUpgrader = websocket.Upgrader{ReadBufferSize: 1024, WriteBufferSize: 1024}
|
|
var errWsNouser = errors.New("This user isn't connected via WebSockets")
|
|
|
|
func init() {
|
|
adminStatsWatchers = make(map[*WSUser]bool)
|
|
wsHub = WSHub{
|
|
onlineUsers: make(map[int]*WSUser),
|
|
onlineGuests: make(map[*WSUser]bool),
|
|
}
|
|
}
|
|
|
|
func (hub *WSHub) guestCount() int {
|
|
defer hub.guests.RUnlock()
|
|
hub.guests.RLock()
|
|
return len(hub.onlineGuests)
|
|
}
|
|
|
|
func (hub *WSHub) userCount() int {
|
|
defer hub.users.RUnlock()
|
|
hub.users.RLock()
|
|
return len(hub.onlineUsers)
|
|
}
|
|
|
|
func (hub *WSHub) broadcastMessage(msg string) error {
|
|
hub.users.RLock()
|
|
for _, wsUser := range hub.onlineUsers {
|
|
w, err := wsUser.conn.NextWriter(websocket.TextMessage)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, _ = w.Write([]byte(msg))
|
|
}
|
|
hub.users.RUnlock()
|
|
return nil
|
|
}
|
|
|
|
func (hub *WSHub) pushMessage(targetUser int, msg string) error {
|
|
hub.users.RLock()
|
|
wsUser, ok := hub.onlineUsers[targetUser]
|
|
hub.users.RUnlock()
|
|
if !ok {
|
|
return errWsNouser
|
|
}
|
|
|
|
w, err := wsUser.conn.NextWriter(websocket.TextMessage)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
w.Write([]byte(msg))
|
|
w.Close()
|
|
return nil
|
|
}
|
|
|
|
func (hub *WSHub) pushAlert(targetUser int, asid int, event string, elementType string, actorID int, targetUserID int, elementID int) error {
|
|
//log.Print("In pushAlert")
|
|
hub.users.RLock()
|
|
wsUser, ok := hub.onlineUsers[targetUser]
|
|
hub.users.RUnlock()
|
|
if !ok {
|
|
return errWsNouser
|
|
}
|
|
|
|
//log.Print("Building alert")
|
|
alert, err := buildAlert(asid, event, elementType, actorID, targetUserID, elementID, *wsUser.User)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
//log.Print("Getting WS Writer")
|
|
w, err := wsUser.conn.NextWriter(websocket.TextMessage)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
w.Write([]byte(alert))
|
|
_ = w.Close()
|
|
return nil
|
|
}
|
|
|
|
func (hub *WSHub) pushAlerts(users []int, asid int, event string, elementType string, actorID int, targetUserID int, elementID int) error {
|
|
//log.Print("In pushAlerts")
|
|
var wsUsers []*WSUser
|
|
hub.users.RLock()
|
|
// We don't want to keep a lock on this for too long, so we'll accept some nil pointers
|
|
for _, uid := range users {
|
|
wsUsers = append(wsUsers, hub.onlineUsers[uid])
|
|
}
|
|
hub.users.RUnlock()
|
|
if len(wsUsers) == 0 {
|
|
return errWsNouser
|
|
}
|
|
|
|
var errs []error
|
|
for _, wsUser := range wsUsers {
|
|
if wsUser == nil {
|
|
continue
|
|
}
|
|
|
|
//log.Print("Building alert")
|
|
alert, err := buildAlert(asid, event, elementType, actorID, targetUserID, elementID, *wsUser.User)
|
|
if err != nil {
|
|
errs = append(errs, err)
|
|
}
|
|
|
|
//log.Print("Getting WS Writer")
|
|
w, err := wsUser.conn.NextWriter(websocket.TextMessage)
|
|
if err != nil {
|
|
errs = append(errs, err)
|
|
}
|
|
|
|
w.Write([]byte(alert))
|
|
w.Close()
|
|
}
|
|
|
|
// Return the first error
|
|
if len(errs) != 0 {
|
|
for _, err := range errs {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// TODO: How should we handle errors for this?
|
|
func routeWebsockets(w http.ResponseWriter, r *http.Request, user User) RouteError {
|
|
conn, err := wsUpgrader.Upgrade(w, r, nil)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
userptr, err := users.Get(user.ID)
|
|
if err != nil && err != ErrStoreCapacityOverflow {
|
|
return nil
|
|
}
|
|
|
|
wsUser := &WSUser{conn, userptr}
|
|
if user.ID == 0 {
|
|
wsHub.guests.Lock()
|
|
wsHub.onlineGuests[wsUser] = true
|
|
wsHub.guests.Unlock()
|
|
} else {
|
|
wsHub.users.Lock()
|
|
wsHub.onlineUsers[user.ID] = wsUser
|
|
wsHub.users.Unlock()
|
|
}
|
|
|
|
//conn.SetReadLimit(/* put the max request size from earlier here? */)
|
|
//conn.SetReadDeadline(time.Now().Add(60 * time.Second))
|
|
var currentPage []byte
|
|
for {
|
|
_, message, err := conn.ReadMessage()
|
|
if err != nil {
|
|
if user.ID == 0 {
|
|
wsHub.guests.Lock()
|
|
delete(wsHub.onlineGuests, wsUser)
|
|
wsHub.guests.Unlock()
|
|
} else {
|
|
wsHub.users.Lock()
|
|
delete(wsHub.onlineUsers, user.ID)
|
|
wsHub.users.Unlock()
|
|
}
|
|
break
|
|
}
|
|
|
|
//log.Print("Message", message)
|
|
//log.Print("string(Message)", string(message))
|
|
messages := bytes.Split(message, []byte("\r"))
|
|
for _, msg := range messages {
|
|
//log.Print("Submessage", msg)
|
|
//log.Print("Submessage", string(msg))
|
|
if bytes.HasPrefix(msg, []byte("page ")) {
|
|
msgblocks := bytes.SplitN(msg, []byte(" "), 2)
|
|
if len(msgblocks) < 2 {
|
|
continue
|
|
}
|
|
|
|
if !bytes.Equal(msgblocks[1], currentPage) {
|
|
wsLeavePage(wsUser, currentPage)
|
|
currentPage = msgblocks[1]
|
|
//log.Print("Current Page:", currentPage)
|
|
//log.Print("Current Page:", string(currentPage))
|
|
wsPageResponses(wsUser, currentPage)
|
|
}
|
|
}
|
|
/*if bytes.Equal(message,[]byte(`start-view`)) {
|
|
} else if bytes.Equal(message,[]byte(`end-view`)) {
|
|
}*/
|
|
}
|
|
}
|
|
conn.Close()
|
|
return nil
|
|
}
|
|
|
|
func wsPageResponses(wsUser *WSUser, page []byte) {
|
|
switch string(page) {
|
|
case "/panel/":
|
|
//log.Print("/panel/ WS Route")
|
|
/*w, err := wsUser.conn.NextWriter(websocket.TextMessage)
|
|
if err != nil {
|
|
//log.Print(err.Error())
|
|
return
|
|
}
|
|
|
|
log.Print(wsHub.online_users)
|
|
uonline := wsHub.userCount()
|
|
gonline := wsHub.guestCount()
|
|
totonline := uonline + gonline
|
|
|
|
w.Write([]byte("set #dash-totonline " + strconv.Itoa(totonline) + " online\r"))
|
|
w.Write([]byte("set #dash-gonline " + strconv.Itoa(gonline) + " guests online\r"))
|
|
w.Write([]byte("set #dash-uonline " + strconv.Itoa(uonline) + " users online\r"))
|
|
w.Close()*/
|
|
|
|
// Listen for changes and inform the admins...
|
|
adminStatsMutex.Lock()
|
|
watchers := len(adminStatsWatchers)
|
|
adminStatsWatchers[wsUser] = true
|
|
if watchers == 0 {
|
|
go adminStatsTicker()
|
|
}
|
|
adminStatsMutex.Unlock()
|
|
}
|
|
}
|
|
|
|
func wsLeavePage(wsUser *WSUser, page []byte) {
|
|
switch string(page) {
|
|
case "/panel/":
|
|
adminStatsMutex.Lock()
|
|
delete(adminStatsWatchers, wsUser)
|
|
adminStatsMutex.Unlock()
|
|
}
|
|
}
|
|
|
|
var adminStatsWatchers map[*WSUser]bool
|
|
var adminStatsMutex sync.RWMutex
|
|
|
|
func adminStatsTicker() {
|
|
time.Sleep(time.Second)
|
|
|
|
var lastUonline = -1
|
|
var lastGonline = -1
|
|
var lastTotonline = -1
|
|
var lastCPUPerc = -1
|
|
var lastAvailableRAM int64 = -1
|
|
var noStatUpdates bool
|
|
var noRAMUpdates bool
|
|
|
|
var onlineColour, onlineGuestsColour, onlineUsersColour, cpustr, cpuColour, ramstr, ramColour string
|
|
var cpuerr, ramerr error
|
|
var memres *mem.VirtualMemoryStat
|
|
var cpuPerc []float64
|
|
|
|
var totunit, uunit, gunit string
|
|
|
|
AdminStatLoop:
|
|
for {
|
|
adminStatsMutex.RLock()
|
|
watchCount := len(adminStatsWatchers)
|
|
adminStatsMutex.RUnlock()
|
|
if watchCount == 0 {
|
|
break AdminStatLoop
|
|
}
|
|
|
|
cpuPerc, cpuerr = cpu.Percent(time.Second, true)
|
|
memres, ramerr = mem.VirtualMemory()
|
|
uonline := wsHub.userCount()
|
|
gonline := wsHub.guestCount()
|
|
totonline := uonline + gonline
|
|
|
|
// It's far more likely that the CPU Usage will change than the other stats, so we'll optimise them separately...
|
|
noStatUpdates = (uonline == lastUonline && gonline == lastGonline && totonline == lastTotonline)
|
|
noRAMUpdates = (lastAvailableRAM == int64(memres.Available))
|
|
if int(cpuPerc[0]) == lastCPUPerc && noStatUpdates && noRAMUpdates {
|
|
time.Sleep(time.Second)
|
|
continue
|
|
}
|
|
|
|
if !noStatUpdates {
|
|
if totonline > 10 {
|
|
onlineColour = "stat_green"
|
|
} else if totonline > 3 {
|
|
onlineColour = "stat_orange"
|
|
} else {
|
|
onlineColour = "stat_red"
|
|
}
|
|
|
|
if gonline > 10 {
|
|
onlineGuestsColour = "stat_green"
|
|
} else if gonline > 1 {
|
|
onlineGuestsColour = "stat_orange"
|
|
} else {
|
|
onlineGuestsColour = "stat_red"
|
|
}
|
|
|
|
if uonline > 5 {
|
|
onlineUsersColour = "stat_green"
|
|
} else if uonline > 1 {
|
|
onlineUsersColour = "stat_orange"
|
|
} else {
|
|
onlineUsersColour = "stat_red"
|
|
}
|
|
|
|
totonline, totunit = convertFriendlyUnit(totonline)
|
|
uonline, uunit = convertFriendlyUnit(uonline)
|
|
gonline, gunit = convertFriendlyUnit(gonline)
|
|
}
|
|
|
|
if cpuerr != nil {
|
|
cpustr = "Unknown"
|
|
} else {
|
|
calcperc := int(cpuPerc[0]) / runtime.NumCPU()
|
|
cpustr = strconv.Itoa(calcperc)
|
|
if calcperc < 30 {
|
|
cpuColour = "stat_green"
|
|
} else if calcperc < 75 {
|
|
cpuColour = "stat_orange"
|
|
} else {
|
|
cpuColour = "stat_red"
|
|
}
|
|
}
|
|
|
|
if !noRAMUpdates {
|
|
if ramerr != nil {
|
|
ramstr = "Unknown"
|
|
} else {
|
|
totalCount, totalUnit := convertByteUnit(float64(memres.Total))
|
|
usedCount := convertByteInUnit(float64(memres.Total-memres.Available), totalUnit)
|
|
|
|
// Round totals with .9s up, it's how most people see it anyway. Floats are notoriously imprecise, so do it off 0.85
|
|
var totstr string
|
|
if (totalCount - float64(int(totalCount))) > 0.85 {
|
|
usedCount += 1.0 - (totalCount - float64(int(totalCount)))
|
|
totstr = strconv.Itoa(int(totalCount) + 1)
|
|
} else {
|
|
totstr = fmt.Sprintf("%.1f", totalCount)
|
|
}
|
|
|
|
if usedCount > totalCount {
|
|
usedCount = totalCount
|
|
}
|
|
ramstr = fmt.Sprintf("%.1f", usedCount) + " / " + totstr + totalUnit
|
|
|
|
ramperc := ((memres.Total - memres.Available) * 100) / memres.Total
|
|
if ramperc < 50 {
|
|
ramColour = "stat_green"
|
|
} else if ramperc < 75 {
|
|
ramColour = "stat_orange"
|
|
} else {
|
|
ramColour = "stat_red"
|
|
}
|
|
}
|
|
}
|
|
|
|
adminStatsMutex.RLock()
|
|
watchers := adminStatsWatchers
|
|
adminStatsMutex.RUnlock()
|
|
|
|
for watcher := range watchers {
|
|
w, err := watcher.conn.NextWriter(websocket.TextMessage)
|
|
if err != nil {
|
|
//log.Print(err.Error())
|
|
adminStatsMutex.Lock()
|
|
delete(adminStatsWatchers, watcher)
|
|
adminStatsMutex.Unlock()
|
|
continue
|
|
}
|
|
|
|
// nolint
|
|
if !noStatUpdates {
|
|
w.Write([]byte("set #dash-totonline " + strconv.Itoa(totonline) + totunit + " online\r"))
|
|
w.Write([]byte("set #dash-gonline " + strconv.Itoa(gonline) + gunit + " guests online\r"))
|
|
w.Write([]byte("set #dash-uonline " + strconv.Itoa(uonline) + uunit + " users online\r"))
|
|
|
|
w.Write([]byte("set-class #dash-totonline grid_item grid_stat " + onlineColour + "\r"))
|
|
w.Write([]byte("set-class #dash-gonline grid_item grid_stat " + onlineGuestsColour + "\r"))
|
|
w.Write([]byte("set-class #dash-uonline grid_item grid_stat " + onlineUsersColour + "\r"))
|
|
}
|
|
|
|
w.Write([]byte("set #dash-cpu CPU: " + cpustr + "%\r"))
|
|
w.Write([]byte("set-class #dash-cpu grid_item grid_istat " + cpuColour + "\r"))
|
|
|
|
if !noRAMUpdates {
|
|
w.Write([]byte("set #dash-ram RAM: " + ramstr + "\r"))
|
|
w.Write([]byte("set-class #dash-ram grid_item grid_istat " + ramColour + "\r"))
|
|
}
|
|
|
|
w.Close()
|
|
}
|
|
|
|
lastUonline = uonline
|
|
lastGonline = gonline
|
|
lastTotonline = totonline
|
|
lastCPUPerc = int(cpuPerc[0])
|
|
lastAvailableRAM = int64(memres.Available)
|
|
|
|
//time.Sleep(time.Second)
|
|
}
|
|
}
|