/
server.go
140 lines (126 loc) · 2.87 KB
/
server.go
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package main
import (
"crypto/tls"
"log"
"net/http"
"time"
"github.com/sirupsen/logrus"
"golang.org/x/net/context"
)
type Server struct {
Name string
KeyFile string
CertFile string
CertProvider AutoCertProvider
http *http.Server
https *http.Server
httpStarted bool
httpsStarted bool
}
type ServerOptions struct {
Name string
HTTPAddr string
HTTPSAddr string
CertProvider AutoCertProvider
RedirectToHTTPS bool
Handler http.Handler
}
type LogrusWrapper struct {
*logrus.Entry
}
func (l LogrusWrapper) Write(b []byte) (int, error) {
return l.Logger.WriterLevel(logrus.ErrorLevel).Write(b)
}
func NewServer(opt ServerOptions) *Server {
var httpHandler http.Handler
var s *Server
if opt.RedirectToHTTPS {
httpHandler = http.HandlerFunc(redirectToTLSHandler)
} else {
httpHandler = opt.Handler
}
logger := log.Default()
logger.SetOutput(LogrusWrapper{
logrus.WithFields(logrus.Fields{"component": "server", "name": opt.Name}),
})
if opt.CertProvider != nil {
s = &Server{
Name: opt.Name,
CertProvider: opt.CertProvider,
http: &http.Server{
Addr: opt.HTTPAddr,
Handler: httpHandler,
ErrorLog: logger,
},
https: &http.Server{
Addr: opt.HTTPSAddr,
Handler: opt.Handler,
ErrorLog: logger,
TLSConfig: &tls.Config{
GetCertificate: opt.CertProvider.GetCert,
},
},
}
}
s = &Server{
Name: opt.Name,
KeyFile: keyFileDefault,
CertFile: certFileDefault,
http: &http.Server{
Addr: opt.HTTPAddr,
Handler: httpHandler,
ErrorLog: logger,
},
https: &http.Server{
Addr: opt.HTTPSAddr,
Handler: opt.Handler,
ErrorLog: logger,
},
}
if !s.certsOK() {
s.http.Handler = opt.Handler
}
return s
}
func (s *Server) Start() {
if s.http != nil {
s.httpStarted = true
logrus.Printf("starting http %s server on %s", s.Name, s.http.Addr)
go func() {
err := s.http.ListenAndServe()
s.handleErr("http", err)
}()
}
if s.https != nil && (s.CertProvider != nil || s.certsOK()) {
s.httpsStarted = true
logrus.Printf("starting https %s server on %s", s.Name, s.https.Addr)
go func() {
err := s.https.ListenAndServeTLS(s.CertFile, s.KeyFile)
s.handleErr("https", err)
}()
}
}
func (s *Server) Stop() {
ctx, _ := context.WithTimeout(context.Background(), 3*time.Second)
if s.httpStarted {
errHTTP := s.http.Shutdown(ctx)
s.handleErr("http", errHTTP)
s.httpStarted = false
}
if s.httpsStarted {
errHTTPS := s.https.Shutdown(ctx)
s.handleErr("https", errHTTPS)
s.httpsStarted = false
}
}
func (s *Server) handleErr(scheme string, err error) {
switch err {
case nil, http.ErrServerClosed:
return
default:
logrus.Fatalf("failed to start %s %s server: %v", scheme, s.Name, err)
}
}
func (s *Server) certsOK() bool {
return utils.fileOK(s.CertFile) && utils.fileOK(s.KeyFile)
}