fix https://github.com/Neilpang/acme.sh/issues/490

dnsapi/dns_cf.sh

@@ -132,6 +132,7 @@ _get_root() {
   p=1
   while true; do
     h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    _debug h "$h"
     if [ -z "$h" ]; then
       #not valid
       return 1
@@ -141,8 +142,8 @@ _get_root() {
       return 1
     fi
 
-    if printf "%s" "$response" | grep "\"name\":\"$h\"" >/dev/null; then
-      _domain_id=$(printf "%s\n" "$response" | _egrep_o "\[{\"id\":\"[^\"]*\"" | head -n 1 | cut -d : -f 2 | tr -d \")
+    if _contains "$response" "\"name\":\"$h\"" >/dev/null; then
+      _domain_id=$(printf "%s\n" "$response" | _egrep_o "\[.\"id\":\"[^\"]*\"" | head -n 1 | cut -d : -f 2 | tr -d \")
       if [ "$_domain_id" ]; then
         _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
         _domain=$h