fix: display expire time.

cmd/api/v5/version.go

@@ -15,8 +15,9 @@ func (v Version) Url(prefix, name string) string {
 }
 
 func (v Version) Tmpl() string {
-	return `Version :  {{ .Version }}
+	return `Version  :  {{ .Version }}
-Build at:  {{ .Date}}
+Build at :  {{ .Date}}
+Expire at:  {{ .Expire }}
 `
 }
 

pkg/api/version.go

@@ -1,9 +1,11 @@
 package api
 
 import (
-	"github.com/gorilla/mux"
-	"github.com/luscis/openlan/pkg/schema"
 	"net/http"
+
+	"github.com/gorilla/mux"
+	"github.com/luscis/openlan/pkg/cache"
+	"github.com/luscis/openlan/pkg/schema"
 )
 
 type Version struct {
@@ -15,5 +17,6 @@ func (l Version) Router(router *mux.Router) {
 
 func (l Version) List(w http.ResponseWriter, r *http.Request) {
 	ver := schema.NewVersionSchema()
+	ver.Expire = cache.User.ExpireTime()
 	ResponseJson(w, ver)
 }

pkg/cache/user.go

@@ -246,6 +246,29 @@ func (w *user) SetCert(cfg *libol.CertConfig) {
 	w.Cert = cfg.Crt
 }
 
+func (w *user) ExpireTime() string {
+	if w.Cert == "" {
+		return ""
+	}
+
+	pemData, err := os.ReadFile(w.Cert)
+	if err != nil {
+		return ""
+	}
+
+	block, rest := pem.Decode(pemData)
+	if block == nil || len(rest) > 0 {
+		return ""
+	}
+
+	cert, err := x509.ParseCertificate(block.Bytes)
+	if err != nil {
+		return ""
+	}
+
+	return cert.NotAfter.Format(time.RFC3339)
+}
+
 var User = user{
 	Users: libol.NewSafeStrMap(1024),
 }

pkg/schema/version.go

@@ -5,6 +5,7 @@ import "github.com/luscis/openlan/pkg/libol"
 type Version struct {
 	Version string `json:"version"`
 	Date    string `json:"date"`
+	Expire  string `json:"expire"`
 }
 
 func NewVersionSchema() Version {