Fix PoweDNSBackend record type and error handling

server/backends.py

@@ -2,6 +2,10 @@ import requests
 import json
 
 
+class BackendException(Exception):
+    pass
+
+
 class Backend(object):
     def __init__(self, config):
         self.config = config
@@ -55,15 +59,19 @@ class PowerDNSBackend(Backend):
             self.config.get('PDNS_URL', 'http://127.0.0.1:8081'),
             self.config['PDNS_ZONE'],
             )
-        return requests.patch(api_url, data=json.dumps(reqdata), headers={
+
+        resp = requests.patch(api_url, data=json.dumps(reqdata), headers={
             'X-API-Key': self.config['PDNS_TOKEN']
             }).json()
 
+        if 'error' in resp:
+            raise BackendException(resp['error'])
+
     def add(self, name, value, type_):
         self.do_patch({
             "rrsets": [{
                 "name": name + ".",
-                "type": "A",
+                "type": type_,
                 "ttl": 86400,
                 "changetype": "REPLACE",
                 "records": [{