Add validator script

scripts/validate.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+
+import sys
+import json
+import httplib2
+from jsonschema import validate, Draft4Validator
+from jsonschema.exceptions import ValidationError
+
+try: input_json = sys.argv[1]
+except IndexError: sys.exit("Usage: %s input_json" % sys.argv[0])
+
+network = httplib2.Http()
+response, content = network.request("http://developer.mpds.io/mpds.schema.json")
+assert response.status == 200
+
+schema = json.loads(content)
+Draft4Validator.check_schema(schema)
+
+target = json.loads(open(input_json).read())
+
+if not target.get("npages") or not target.get("out") or target.get("error"):
+    sys.exit("Unexpected API response")
+
+try:
+    validate(target["out"], schema)
+except ValidationError, e:
+    raise RuntimeError(
+        "The item: \r\n\r\n %s \r\n\r\n has an issue: \r\n\r\n %s" % (
+            e.instance, e.context
+        )
+    )