initial commit

src/service/api/utils.py

@@ -0,0 +1,30 @@
+import json
+
+from aiohttp.web import Response
+from typing import Any, Mapping, List
+
+from .json import HttpEncoder
+
+
+def make_json(response: Any, args: Mapping[str, Any], code: int = 200) -> str:
+    return json.dumps({
+        'arguments': dict(args),
+        'response': response,
+        'status': code
+    }, cls=HttpEncoder, sort_keys=True)
+
+
+def wrap_exception(exception: Exception, args: Mapping[str, Any], code: int = 500) -> Response:
+    return wrap_json({'message': repr(exception)}, args, code)
+
+
+def wrap_invalid_param(params: List[str], args: Mapping[str, Any], code: int = 400) -> Response:
+    return wrap_json({'message': 'invalid or missing parameters: `{}`'.format(params)}, args, code)
+
+
+def wrap_json(response: Any, args: Mapping[str, Any], code: int = 200) -> Response:
+    return Response(
+        text=make_json(response, args, code),
+        status=code,
+        content_type='application/json'
+    )