From 3a426a1382d157ccc75bc801edf9d5f33c2a4c69 Mon Sep 17 00:00:00 2001
From: Rekby <timofey@koolin.ru>
Date: Mon, 11 Apr 2016 07:22:00 +0300
Subject: [PATCH] retry get nonce few times before return error

---
 acme/jws.go | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/acme/jws.go b/acme/jws.go
index dbb32ccf..453b791c 100644
--- a/acme/jws.go
+++ b/acme/jws.go
@@ -11,8 +11,12 @@ import (
 
 	"gopkg.in/square/go-jose.v1"
 	"errors"
+	"time"
 )
 
+const TRY_COUNT = 10
+const RETRY_PAUSE = time.Second
+
 type jws struct {
 	directoryURL string
 	privKey      crypto.PrivateKey
@@ -97,14 +101,21 @@ func (j *jws) getNonce() error {
 func (j *jws) Nonce() (string, error) {
 	nonce := ""
 	if len(j.nonces) == 0 {
-		err := j.getNonce()
-		if err != nil {
-			return nonce, err
-		}
-		if len(j.nonces) == 0 {
-			return "", errors.New("Can't get nonce")
+		for i := 0; i < TRY_COUNT; i++ {
+			err := j.getNonce()
+			if err != nil {
+				return nonce, err
+			}
+			if len(j.nonces) != 0 {
+				// get nonce ok and can continue
+				break
+			}
+			time.Sleep(RETRY_PAUSE);
 		}
 	}
+	if len(j.nonces) == 0 {
+		return "", errors.New("Can't get nonce")
+	}
 
 	nonce, j.nonces = j.nonces[len(j.nonces)-1], j.nonces[:len(j.nonces)-1]
 	return nonce, nil