Use render.Error on crl endpoint

api/crl.go

@@ -2,35 +2,20 @@ package api
 
 import (
 	"encoding/pem"
-	"fmt"
-	"github.com/pkg/errors"
-	"github.com/smallstep/certificates/errs"
 	"net/http"
+
+	"github.com/smallstep/certificates/api/render"
 )
 
 // CRL is an HTTP handler that returns the current CRL in DER or PEM format
 func CRL(w http.ResponseWriter, r *http.Request) {
 	crlBytes, err := mustAuthority(r.Context()).GetCertificateRevocationList()
-
-	_, formatAsPEM := r.URL.Query()["pem"]
-
 	if err != nil {
-
+		render.Error(w, err)
-		caErr, isCaErr := err.(*errs.Error)
-
-		if isCaErr {
-			http.Error(w, caErr.Msg, caErr.Status)
-			return
-		}
-
-		w.WriteHeader(500)
-		_, err = fmt.Fprintf(w, "%v\n", err)
-		if err != nil {
-			panic(errors.Wrap(err, "error writing http response"))
-		}
 		return
 	}
 
+	_, formatAsPEM := r.URL.Query()["pem"]
 	if formatAsPEM {
 		pemBytes := pem.EncodeToMemory(&pem.Block{
 			Type:  "X509 CRL",
@@ -38,15 +23,10 @@ func CRL(w http.ResponseWriter, r *http.Request) {
 		})
 		w.Header().Add("Content-Type", "application/x-pem-file")
 		w.Header().Add("Content-Disposition", "attachment; filename=\"crl.pem\"")
-		_, err = w.Write(pemBytes)
+		w.Write(pemBytes)
 	} else {
 		w.Header().Add("Content-Type", "application/pkix-crl")
 		w.Header().Add("Content-Disposition", "attachment; filename=\"crl.der\"")
-		_, err = w.Write(crlBytes)
+		w.Write(crlBytes)
 	}
-
-	if err != nil {
-		panic(errors.Wrap(err, "error writing http response"))
-	}
-
 }