added additional checks and retry on 500 error from ACME server

getssl

@@ -107,11 +107,12 @@
 # 2016-09-19 remove update check on recursive calls when using -a (1.41)
 # 2016-09-21 changed shebang for portability (1.42)
 # 2016-09-21 Included option to Deactivate an Authorization (1.43)
-# 2016-09-21 retry on 500 error from ACME server (1.44)
+# 2016-09-22 retry on 500 error from ACME server (1.44)
+# 2016-09-22 added additional checks and retry on 500 error from ACME server (1.45)
 # ---------------------------------------------------------------------------
 
 PROGNAME=${0##*/}
-VERSION="1.44"
+VERSION="1.45"
 
 # defaults
 CODE_LOCATION="https://raw.githubusercontent.com/srvrco/getssl/master/getssl"
@@ -505,7 +506,8 @@ send_signed_request() { # Sends a request to the ACME server, signed with your p
   body='{"header": '"${header}"', "protected": "'"${protected64}"'", "payload": "'"${payload64}"'", "signature": "'"${signed64}"'"}'
   debug "data for account registration = $body"
 
-  code=500
+  code="500"
+  loop_limit=5
   while [ $code -eq 500 ]; do
     if [ "$needbase64" ] ; then
       response=$($CURL -X POST --data "$body" "$url" | urlbase64)
@@ -519,8 +521,13 @@ send_signed_request() { # Sends a request to the ACME server, signed with your p
     code=$(os_grep ^HTTP "$CURL_HEADER" | tail -1 | cut -d " " -f 2)
     debug code "$code"
     response_status=$(echo "$response"| os_grep status | head -1 | awk -F'"' '{print $4}')
-    if [ $code -eq 500 ]; then
-      info "error on acme server - trying again"
+    if [ "$code" -eq 500 ]; then
+      info "error on acme server - trying again ...."
+      sleep 2
+      loop_limit=$((loop_limit - 1))
+      if [ $loop_limit -lt 1 ]; then
+        error_exit "500 error from ACME server:  $response"
+      fi
     fi
   done
 }