func main() {
var srv http.Server
flag.BoolVar(&http2.VerboseLogs, "verbose", false, "Verbose HTTP/2 debugging.")
flag.Parse()
srv.Addr = *httpsAddr
srv.ConnState = idleTimeoutHook()
registerHandlers()
if *prod {
*hostHTTP = "http2.golang.org"
*hostHTTPS = "http2.golang.org"
log.Fatal(serveProd())
}
url := "https://" + httpsHost() + "/"
log.Printf("Listening on " + url)
http2.ConfigureServer(&srv, &http2.Server{})
if *httpAddr != "" {
go func() {
log.Printf("Listening on http://" + httpHost() + "/ (for unencrypted HTTP/1)")
log.Fatal(http.ListenAndServe(*httpAddr, nil))
}()
}
go func() {
log.Fatal(srv.ListenAndServeTLS("server.crt", "server.key"))
}()
select {}
}
// Run the http server on a given host and port.
func (m *Martini) RunOnAddr(addr string) {
// TODO: Should probably be implemented using a new instance of http.Server in place of
// calling http.ListenAndServer directly, so that it could be stored in the martini struct for later use.
// This would also allow to improve testing when a custom host and port are passed.
logger := m.Injector.Get(reflect.TypeOf(m.logger)).Interface().(*log.Logger)
logger.Printf("listening on %s (%s)\n", addr, Env)
l, err := net.Listen("tcp", addr)
if err != nil {
logger.Fatalln(err.Error())
return
}
var server http.Server
server.Handler = m
server.ConnState = m.connectStateChange
m.server.l = l
go func() {
channel := m.server.stateChannel
for input := range channel {
switch input.state {
case http.StateNew, http.StateActive, http.StateIdle:
m.server.connsLock.Lock()
m.server.stateMap[input.conn] = input.state
m.server.connsLock.Unlock()
case http.StateHijacked, http.StateClosed:
m.server.connsLock.Lock()
delete(m.server.stateMap, input.conn)
m.server.connsLock.Unlock()
}
}
}()
server.Serve(l)
}
// NewServeCloser wraps srv and returns a closable HTTP server.
func NewServeCloser(srv *http.Server) (s *ServeCloser) {
s = &ServeCloser{
Server: srv,
stateHook: srv.ConnState,
conns: make(map[net.Conn]bool),
}
srv.ConnState = s.connState
return
}
// Similar to http.Serve. The listener passed must wrap a GracefulListener.
func (s *GracefulServer) Serve(listener net.Listener, handler http.Handler) error {
s.shutdownHandler = func() { listener.Close() }
s.listenForShutdown()
server := http.Server{Handler: handler}
server.ConnState = func(conn net.Conn, newState http.ConnState) {
switch newState {
case http.StateNew:
s.StartRoutine()
case http.StateClosed, http.StateHijacked:
s.FinishRoutine()
}
}
err := server.Serve(listener)
// This block is reached when the server has received a shut down command.
if err == nil {
return nil
} else if _, ok := err.(listenerAlreadyClosed); ok {
s.wg.Wait()
return nil
}
return err
}
// Serve provides the low-level API which is useful if you're creating your own
// net.Listener.
func (h HTTP) Serve(s *http.Server, l net.Listener) Server {
stopTimeout := h.StopTimeout
if stopTimeout == 0 {
stopTimeout = defaultStopTimeout
}
killTimeout := h.KillTimeout
if killTimeout == 0 {
killTimeout = defaultKillTimeout
}
klock := h.Clock
if klock == nil {
klock = clock.New()
}
ss := &server{
stopTimeout: stopTimeout,
killTimeout: killTimeout,
stats: h.Stats,
clock: klock,
oldConnState: s.ConnState,
listener: l,
server: s,
serveDone: make(chan struct{}),
serveErr: make(chan error, 1),
new: make(chan net.Conn),
active: make(chan net.Conn),
idle: make(chan net.Conn),
closed: make(chan net.Conn),
stop: make(chan chan struct{}),
kill: make(chan chan struct{}),
}
s.ConnState = ss.connState
go ss.manage()
go ss.serve()
return ss
}
// ServeHandler serves the handler on the listener and returns a function that
// serves an additional listener using a function that takes a connection. The
// returned function can be called multiple times.
func ServeHandler(
stopper *stop.Stopper, handler http.Handler, ln net.Listener, tlsConfig *tls.Config,
) func(net.Listener, func(net.Conn)) error {
var mu sync.Mutex
activeConns := make(map[net.Conn]struct{})
logger := log.NewStdLogger(log.ErrorLog)
httpServer := http.Server{
Handler: handler,
TLSConfig: tlsConfig,
ConnState: func(conn net.Conn, state http.ConnState) {
mu.Lock()
switch state {
case http.StateNew:
activeConns[conn] = struct{}{}
case http.StateClosed:
delete(activeConns, conn)
}
mu.Unlock()
},
ErrorLog: logger,
}
// net/http.(*Server).Serve/http2.ConfigureServer are not thread safe with
// respect to net/http.(*Server).TLSConfig, so we call it synchronously here.
if err := http2.ConfigureServer(&httpServer, nil); err != nil {
log.Fatal(err)
}
stopper.RunWorker(func() {
FatalIfUnexpected(httpServer.Serve(ln))
<-stopper.ShouldStop()
mu.Lock()
for conn := range activeConns {
conn.Close()
}
mu.Unlock()
})
logFn := logger.Printf
return func(l net.Listener, serveConn func(net.Conn)) error {
// Inspired by net/http.(*Server).Serve
var tempDelay time.Duration // how long to sleep on accept failure
for {
rw, e := l.Accept()
if e != nil {
if ne, ok := e.(net.Error); ok && ne.Temporary() {
if tempDelay == 0 {
tempDelay = 5 * time.Millisecond
} else {
tempDelay *= 2
}
if max := 1 * time.Second; tempDelay > max {
tempDelay = max
}
logFn("http: Accept error: %v; retrying in %v", e, tempDelay)
time.Sleep(tempDelay)
continue
}
return e
}
tempDelay = 0
go func() {
httpServer.ConnState(rw, http.StateNew) // before Serve can return
serveConn(rw)
httpServer.ConnState(rw, http.StateClosed)
}()
}
}
}
