add metaserver and use meta lookup service

oml/metaremote.py

@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+# vi:si:et:sw=4:sts=4:ts=4
+from __future__ import division
+
+import json
+from ox.cache import read_url
+from urllib import urlencode
+
+import logging
+logger = logging.getLogger('metaremote')
+
+def request(action, data):
+        data = urlencode({
+            'action': action,
+            'data': json.dumps(data)
+        })
+        url = 'http://meta.openmedialibrary.com/api/'
+        try:
+            return json.loads(read_url(url, data))['data']
+        except:
+            return {}
+
+def find(query):
+    logger.debug('find %s', query)
+    return request('findMetadata', {'query': query})['items']
+
+def lookup(key, value):
+    logger.debug('lookup %s %s', key, value)
+    return request('getMetadata', {key: value})