func Serve(ctx scope.Context, addr string) {
http.Handle("/metrics", prometheus.Handler())
listener, err := net.Listen("tcp", addr)
if err != nil {
ctx.Terminate(err)
}
closed := false
m := sync.Mutex{}
closeListener := func() {
m.Lock()
if !closed {
listener.Close()
closed = true
}
m.Unlock()
}
// Spin off goroutine to watch ctx and close listener if shutdown requested.
go func() {
<-ctx.Done()
closeListener()
}()
if err := http.Serve(listener, nil); err != nil {
fmt.Printf("http[%s]: %s\n", addr, err)
ctx.Terminate(err)
}
closeListener()
ctx.WaitGroup().Done()
}
func (cmd *serveEmbedCmd) run(ctx scope.Context, args []string) error {
listener, err := net.Listen("tcp", cmd.addr)
if err != nil {
return err
}
closed := false
m := sync.Mutex{}
closeListener := func() {
m.Lock()
if !closed {
listener.Close()
closed = true
}
m.Unlock()
}
// Spin off goroutine to watch ctx and close listener if shutdown requested.
go func() {
<-ctx.Done()
closeListener()
}()
if err := http.Serve(listener, cmd); err != nil {
fmt.Printf("http[%s]: %s\n", cmd.addr, err)
return err
}
closeListener()
ctx.WaitGroup().Done()
return ctx.Err()
}
func (ctrl *Controller) terminal(ctx scope.Context, ch ssh.Channel) {
defer ch.Close()
lines := make(chan string)
term := terminal.NewTerminal(ch, "> ")
go func() {
for ctx.Err() == nil {
line, err := term.ReadLine()
if err != nil {
ctx.Terminate(err)
return
}
lines <- line
}
}()
for {
var line string
select {
case <-ctx.Done():
return
case line = <-lines:
}
cmd := parse(line)
fmt.Printf("[control] > %v\n", cmd)
switch cmd[0] {
case "":
continue
case "quit":
return
case "shutdown":
ctrl.ctx.Terminate(fmt.Errorf("shutdown initiated from console"))
default:
runCommand(ctx.Fork(), ctrl, cmd[0], term, cmd[1:])
}
}
}
func (jq *JobQueueBinding) WaitForJob(ctx scope.Context) error {
ch := make(chan error)
// background goroutine to wait on condition
go func() {
// synchronize with caller
<-ch
jq.m.Unlock()
jq.Backend.jobQueueListener().wait(jq.Name())
ch <- nil
}()
// synchronize with background goroutine
jq.m.Lock()
ch <- nil
jq.m.Lock()
jq.m.Unlock()
select {
case <-ctx.Done():
jq.Backend.jobQueueListener().wakeAll(jq.Name())
<-ch
return ctx.Err()
case err := <-ch:
return err
}
}
func (cmd *serveCmd) run(ctx scope.Context, args []string) error {
listener, err := net.Listen("tcp", cmd.addr)
if err != nil {
return err
}
m := sync.Mutex{}
closed := false
closeListener := func() {
m.Lock()
if !closed {
closed = true
listener.Close()
}
m.Unlock()
}
defer closeListener()
heim, err := getHeim(ctx)
if err != nil {
return fmt.Errorf("configuration error: %s", err)
}
defer heim.Backend.Close()
if cmd.static != "" {
heim.StaticPath = cmd.static
}
if err := controller(heim, cmd.consoleAddr); err != nil {
return fmt.Errorf("controller error: %s", err)
}
serverDesc := backend.Config.Cluster.DescribeSelf()
server, err := backend.NewServer(heim, serverDesc.ID, serverDesc.Era)
if err != nil {
return fmt.Errorf("server error: %s", err)
}
server.SetInsecureCookies(backend.Config.SetInsecureCookies)
server.AllowRoomCreation(backend.Config.AllowRoomCreation)
server.NewAccountMinAgentAge(backend.Config.NewAccountMinAgentAge)
// Spin off goroutine to watch ctx and close listener if shutdown requested.
go func() {
<-ctx.Done()
closeListener()
}()
fmt.Printf("serving era %s on %s\n", serverDesc.Era, cmd.addr)
if err := http.Serve(listener, newVersioningHandler(server)); err != nil {
if strings.HasSuffix(err.Error(), "use of closed network connection") {
return nil
}
return err
}
return nil
}
func (s *session) Send(ctx scope.Context, cmdType proto.PacketType, payload interface{}) error {
// Special case: certain events have privileged info that may need to be stripped from them
switch event := payload.(type) {
case *proto.PresenceEvent:
switch s.privilegeLevel() {
case proto.Staff:
case proto.Host:
event.RealClientAddress = ""
default:
event.RealClientAddress = ""
event.ClientAddress = ""
}
case *proto.Message:
if s.privilegeLevel() == proto.General {
event.Sender.ClientAddress = ""
}
case *proto.EditMessageEvent:
if s.privilegeLevel() == proto.General {
event.Sender.ClientAddress = ""
}
}
var err error
payload, err = proto.DecryptPayload(payload, &s.client.Authorization, s.privilegeLevel())
if err != nil {
return err
}
encoded, err := json.Marshal(payload)
if err != nil {
return err
}
cmd := &proto.Packet{
Type: cmdType,
Data: encoded,
}
// Add to outgoing channel. If channel is full, defer to goroutine so as not to block
// the caller (this may result in deliveries coming out of order).
select {
case <-ctx.Done():
// Session is closed, return error.
return ctx.Err()
case s.outgoing <- cmd:
// Packet delivered to queue.
default:
// Queue is full.
logging.Logger(s.ctx).Printf("outgoing channel full, ordering cannot be guaranteed")
go func() { s.outgoing <- cmd }()
}
return nil
}
func (jq *JobQueue) WaitForJob(ctx scope.Context) error {
ch := make(chan error)
go func() {
jq.m.Lock()
jq.c.Wait()
jq.m.Unlock()
ch <- nil
}()
select {
case <-ctx.Done():
jq.m.Lock()
jq.c.Broadcast()
jq.m.Unlock()
<-ch
return ctx.Err()
case err := <-ch:
return err
}
}
func ScanLoop(ctx scope.Context, c cluster.Cluster, pb *psql.Backend, interval time.Duration) {
defer ctx.WaitGroup().Done()
errCount := 0
for {
t := time.After(interval)
select {
case <-ctx.Done():
return
case <-t:
if err := scan(ctx.Fork(), c, pb); err != nil {
errCount++
fmt.Printf("scan error [%d/%d]: %s", errCount, maxErrors, err)
if errCount > maxErrors {
fmt.Printf("maximum scan errors exceeded, terminating\n")
ctx.Terminate(fmt.Errorf("maximum scan errors exceeded"))
return
}
continue
}
errCount = 0
}
}
}
func ScanLoop(ctx scope.Context, listener *pq.Listener) {
defer ctx.WaitGroup().Done()
logger := logging.Logger(ctx)
for {
select {
case <-ctx.Done():
logger.Printf("received cancellation signal, shutting down")
return
case notice := <-listener.Notify:
if notice == nil {
logger.Printf("received nil from listener")
continue
}
var msg psql.BroadcastMessage
if err := json.Unmarshal([]byte(notice.Extra), &msg); err != nil {
logger.Printf("error: pq listen: invalid broadcast: %s", err)
logger.Printf(" payload: %#v", notice.Extra)
continue
}
switch msg.Event.Type {
case proto.BounceEventType:
bounceActivity.WithLabelValues(msg.Room).Inc()
case proto.JoinEventType:
joinActivity.WithLabelValues(msg.Room).Inc()
case proto.PartEventType:
partActivity.WithLabelValues(msg.Room).Inc()
case proto.SendEventType:
messageActivity.WithLabelValues(msg.Room).Inc()
}
}
}
}
