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program.go
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program.go
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package goginx
import (
"crypto/tls"
"crypto/x509"
"fmt"
"github.com/wllenyj/goginx/daemon"
"github.com/wllenyj/goginx/gracenet"
"io/ioutil"
"log"
"net"
"net/http"
"os"
"os/signal"
"sync"
"syscall"
)
type Service interface {
//Server(net.Listener) error
Serve() error
// graceful quit
Shutdown()
}
type goginxServer struct {
svr *Service
listener net.Listener
}
type Program struct {
daemon *daemon.Daemon
net *gracenet.Net
sds []Service
wg sync.WaitGroup
sigChan chan os.Signal
}
func NewProgram() *Program {
return &Program{
net: &gracenet.Net{},
sds: make([]Service, 0),
sigChan: make(chan os.Signal, 1),
}
}
func Daemon(options ...daemon.Option) (*Program, error) {
opts, err := daemon.DefaultOption(options...)
if err != nil {
return nil, err
}
cntxt := &daemon.Daemon{
Opts: opts,
}
daemon.ConfigSignal("stop", syscall.SIGTERM)
daemon.ConfigSignal("restart", syscall.SIGHUP)
if len(daemon.ActiveFlags()) > 0 {
d, err := cntxt.Search()
if err != nil {
log.Fatalln("Unable send signal to the daemon:", err)
}
daemon.SendCommands(d)
os.Exit(0)
return nil, nil
}
d, err := cntxt.Reborn()
if err != nil {
log.Println(err)
return nil, err
}
if d != nil {
os.Exit(0)
return nil, nil
}
program := &Program{
daemon: cntxt,
net: &gracenet.Net{
ProcAttr: cntxt,
},
sds: make([]Service, 0),
sigChan: make(chan os.Signal, 1),
}
program.net.AddObserver(cntxt)
return program, nil
}
func (this *Program) AddService(svr Service) {
this.sds = append(this.sds, svr)
}
func (prog *Program) ListenTCP(addr string) (net.Listener, error) {
return prog.net.Listen("tcp", addr)
}
func (prog *Program) ListenTLS(addr string, svr_pem, svr_key string, client_pem []string) (net.Listener, error) {
cert, err := tls.LoadX509KeyPair(svr_pem, svr_key)
if err != nil {
return nil, err
}
var clientCertPool *x509.CertPool
if len(client_pem) > 0 {
clientCertPool = x509.NewCertPool()
for _, cpem := range client_pem {
certBytes, err := ioutil.ReadFile(cpem)
if err != nil {
return nil, err
}
ok := clientCertPool.AppendCertsFromPEM(certBytes)
if !ok {
return nil, fmt.Errorf("AppendCertsFromPEM fail")
}
}
}
config := &tls.Config{
Certificates: []tls.Certificate{cert},
ClientAuth: tls.RequireAndVerifyClientCert,
ClientCAs: clientCertPool,
}
ln, err := prog.ListenTCP(addr)
return tls.NewListener(ln, config), nil
}
func (prog *Program) ListenAndServe(addr string, handler http.Handler) error {
srv := NewHttpServer(addr, handler)
l, err := prog.ListenTCP(addr)
if err != nil {
return err
}
log.Printf("net listen ok")
srv.goginxListener = newGoginxListener(l, &srv.wg)
prog.AddService(srv)
return nil
}
func (prog *Program) ListenAndServeTLS(addr string, certFile string, keyFile string, handler http.Handler) error {
srv := NewHttpServer(addr, handler)
config := &tls.Config{}
if srv.TLSConfig != nil {
*config = *srv.TLSConfig
}
if config.NextProtos == nil {
config.NextProtos = []string{"http/1.1"}
}
config.Certificates = make([]tls.Certificate, 1)
var err error
config.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return err
}
l, err := prog.ListenTCP(addr)
if err != nil {
return err
}
//srv.tlsInnerListener = newEndlessListener(l, srv)
inner := newGoginxListener(l, &srv.wg)
srv.goginxListener = tls.NewListener(inner, config)
prog.AddService(srv)
return nil
}
func (this *Program) Run() error {
if this.net.Inherited() {
log.Println(syscall.Getpid(), " kill parent ", syscall.Getppid())
if err := syscall.Kill(syscall.Getppid(), syscall.SIGTERM); err != nil {
log.Printf("failed to close parent: %s", err)
}
}
go this.handleSignals()
for _, s := range this.sds {
svr := s
go func() {
svr.Serve()
this.wg.Done()
}()
this.wg.Add(1)
}
this.wg.Wait()
if this.daemon != nil {
this.daemon.Release()
}
return nil
}
func (this *Program) handleSignals() {
var sig os.Signal
//hookableSignals := []os.Signal{
// syscall.SIGHUP,
// syscall.SIGUSR1,
// syscall.SIGUSR2,
// syscall.SIGINT,
// syscall.SIGTERM,
// syscall.SIGTSTP,
//}
signal.Notify(
this.sigChan,
syscall.SIGHUP,
syscall.SIGUSR1,
syscall.SIGUSR2,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGTSTP,
)
pid := syscall.Getpid()
for {
sig = <-this.sigChan
//srv.signalHooks(PRE_SIGNAL, sig)
switch sig {
case syscall.SIGHUP:
log.Println(pid, "Received SIGHUP. forking.")
if _, err := this.net.StartProcess(); err != nil {
log.Println("StartProcess err.%s", err)
}
case syscall.SIGINT, syscall.SIGTERM:
signal.Stop(this.sigChan)
log.Printf("%d Received %v.", pid, sig)
for _, srv := range this.sds {
srv.Shutdown()
}
return
default:
err := daemon.HandleSignals(sig)
if err != nil {
log.Printf("%v handle err: %v\n", sig, err)
}
log.Printf("Received %v: nothing i care about...\n", sig)
}
//srv.signalHooks(POST_SIGNAL, sig)
}
}