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server.go
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server.go
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package web // import "github.com/veonik/squircy2/web"
import (
"crypto/tls"
"errors"
"io"
stdlog "log"
"net"
"net/http"
"sync"
"time"
"github.com/codegangsta/inject"
"github.com/go-martini/martini"
log "github.com/sirupsen/logrus"
"github.com/veonik/squircy2/config"
)
type Server struct {
*martini.ClassicMartini
l *log.Logger
conf *config.Configuration
httpListener io.Closer
httpsListener io.Closer
}
func NewServer(injector inject.Injector, conf *config.Configuration, l *log.Logger) *Server {
s := &Server{
ClassicMartini: newCustomMartini(injector, l),
l: l,
conf: conf,
}
return s
}
func (s *Server) ListenAndServe() {
wg := &sync.WaitGroup{}
wg.Add(2)
go func() {
defer func() {
if err, ok := recover().(error); ok {
s.l.Errorln("Could not start HTTP: ", err)
}
wg.Done()
}()
err := listenAndServe(s)
if err != nil {
panic(err)
}
}()
go func() {
defer func() {
if err, ok := recover().(error); ok {
s.l.Errorln("Could not start HTTPS: ", err)
}
wg.Done()
}()
err := listenAndServeTLS(s)
if err != nil {
panic(err)
}
}()
wg.Wait()
}
func (s *Server) StopListenAndServe() error {
if s.httpListener == nil {
return errors.New("not listening on http")
}
defer func() {
s.httpListener = nil
}()
return s.httpListener.Close()
}
func (s *Server) StopListenAndServeTLS() error {
if s.httpsListener == nil {
return errors.New("not listening on https")
}
defer func() {
s.httpsListener = nil
}()
return s.httpsListener.Close()
}
func listenAndServe(s *Server) error {
if !s.conf.WebInterface {
return errors.New("web interface is disabled")
}
s.l.Infoln("Starting HTTP, listening at", s.conf.HTTPHostPort)
srv := &http.Server{Addr: s.conf.HTTPHostPort, Handler: s}
listener, err := net.Listen("tcp", s.conf.HTTPHostPort)
if err != nil {
return err
}
go func() {
err := srv.Serve(tcpKeepAliveListener{listener.(*net.TCPListener)})
if err != nil {
s.l.Errorln(err.Error())
}
}()
s.httpListener = listener.(io.Closer)
return nil
}
func listenAndServeTLS(s *Server) error {
if !s.conf.WebInterface {
return errors.New("web interface is disabled")
}
if !s.conf.HTTPS {
return errors.New("https is disabled")
}
s.l.Infoln("Starting HTTPS, listening at", s.conf.SSLHostPort)
srv := &http.Server{Addr: s.conf.SSLHostPort, Handler: s}
var err error
srv.TLSConfig = &tls.Config{}
srv.TLSConfig.NextProtos = []string{"http", "h2"}
srv.TLSConfig.Certificates = make([]tls.Certificate, 1)
srv.TLSConfig.Certificates[0], err = tls.LoadX509KeyPair(s.conf.SSLCertFile, s.conf.SSLCertKey)
if err != nil {
return err
}
listener, err := net.Listen("tcp", s.conf.SSLHostPort)
if err != nil {
return err
}
go func() {
err := srv.Serve(tls.NewListener(tcpKeepAliveListener{listener.(*net.TCPListener)}, srv.TLSConfig))
if err != nil {
s.l.Errorln(err.Error())
}
}()
s.httpsListener = listener.(io.Closer)
return nil
}
// tcpKeepAliveListener sets TCP keep-alive timeouts on accepted
// connections. It's used by ListenAndServe and ListenAndServeTLS so
// dead TCP connections (e.g. closing laptop mid-download) eventually
// go away.
//
// Taken from stdlib net/http.
type tcpKeepAliveListener struct {
*net.TCPListener
}
func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
tc, err := ln.AcceptTCP()
if err != nil {
return
}
tc.SetKeepAlive(true)
tc.SetKeepAlivePeriod(3 * time.Minute)
return tc, nil
}
func newCustomMartini(injector inject.Injector, l *log.Logger) *martini.ClassicMartini {
r := martini.NewRouter()
m := martini.New()
m.Injector = injector
m.Logger(stdlog.New(l.Writer(), "", 0))
m.Use(martini.Logger())
m.Use(martini.Recovery())
m.Use(martini.Static("web/public"))
m.MapTo(r, (*martini.Routes)(nil))
m.Action(r.Handle)
return &martini.ClassicMartini{m, r}
}