Merge pull request #3449 from anom-human/master

Update dns_servercow.sh to support wildcard certs

dnsapi/dns_servercow.sh

@@ -49,6 +49,30 @@ dns_servercow_add() {
   _debug _sub_domain "$_sub_domain"
   _debug _domain "$_domain"
 
+  # check whether a txt record already exists for the subdomain
+  if printf -- "%s" "$response" | grep "{\"name\":\"$_sub_domain\",\"ttl\":20,\"type\":\"TXT\"" >/dev/null; then
+    _info "A txt record with the same name already exists."
+    # trim the string on the left
+    txtvalue_old=${response#*{\"name\":\"$_sub_domain\",\"ttl\":20,\"type\":\"TXT\",\"content\":\"}
+    # trim the string on the right
+    txtvalue_old=${txtvalue_old%%\"*}
+
+    _debug txtvalue_old "$txtvalue_old"
+
+    _info "Add the new txtvalue to the existing txt record."
+    if _servercow_api POST "$_domain" "{\"type\":\"TXT\",\"name\":\"$fulldomain\",\"content\":[\"$txtvalue\",\"$txtvalue_old\"],\"ttl\":20}"; then
+      if printf -- "%s" "$response" | grep "ok" >/dev/null; then
+        _info "Added additional txtvalue, OK"
+        return 0
+      else
+        _err "add txt record error."
+        return 1
+      fi
+    fi
+    _err "add txt record error."
+    return 1
+  else
+    _info "There is no txt record with the name yet."
     if _servercow_api POST "$_domain" "{\"type\":\"TXT\",\"name\":\"$fulldomain\",\"content\":\"$txtvalue\",\"ttl\":20}"; then
       if printf -- "%s" "$response" | grep "ok" >/dev/null; then
         _info "Added, OK"
@@ -59,6 +83,8 @@ dns_servercow_add() {
       fi
     fi
     _err "add txt record error."
+    return 1
+  fi
 
   return 1
 }