Fix bug in download.json

api/schemas/input/download.json

 {
-    "id": "#",
     "$schema": "http://json-schema.org/draft-04/schema#",
     "definitions": {
         "filterDefinition": {
@@ -7,7 +6,8 @@
             "properties": {
                 "+": {"$ref": "#/definitions/filterItems"},
                 "-": {"$ref": "#/definitions/filterItems"}
-            }
+            },
+            "additionalProperties": false
         },
         "filterItems": {
             "type": "array",
@@ -48,8 +48,8 @@
             "items": {
                 "type": "object",
                 "properties": {
-                    "tags": {"$ref": "download.json#/definitions/filterDefinition"},
-                    "types": {"$ref": "download.json#/definitions/filterDefinition"}
+                    "tags": {"$ref": "#/definitions/filterDefinition"},
+                    "types": {"$ref": "#/definitions/filterDefinition"}
                 }
             }
         }

api/validators.py

@@ -2,10 +2,6 @@ import copy
 import json
 import jsonschema
 import os
-import re
-import requests
-
-from jsonschema.compat import urlopen, urlsplit
 
 from . import config
 
@@ -36,14 +32,14 @@ def _validate_json(json_data, schema, resolver):
 
 # We store the resolvers for each base_uri we use, so that we reuse the schemas cached by the resolvers.
 resolvers = {}
-def _resolve_schema(schema_uri):
-    base_uri = os.path.dirname(schema_uri)
-    if not resolvers.get(base_uri):
-        with open(schema_uri) as schema_file:
+def _resolve_schema(schema_file_uri):
+    if not resolvers.get(schema_file_uri):
+        with open(schema_file_uri) as schema_file:
+            base_uri = os.path.dirname(schema_file_uri)
             schema = json.load(schema_file)
             resolver = jsonschema.RefResolver('file://'+base_uri+'/', schema)
-            resolvers[base_uri] = (schema, resolver)
-    return resolvers[base_uri]
+            resolvers[schema_file_uri] = (schema, resolver)
+    return resolvers[schema_file_uri]
 
 def no_op(g, *args): # pylint: disable=unused-argument
     return g