validate date-time format

connexion/decorators/validation.py

@@ -11,6 +11,7 @@
  language governing permissions and limitations under the License.
 """
 
+import datetime
 import flask
 import functools
 import logging
@@ -29,6 +30,21 @@
             'boolean': bool}  # map of swagger types to python types
 
 
+def parse_datetime(s: str):
+    '''http://xml2rfc.ietf.org/public/rfc/html/rfc3339.html#anchor14'''
+    try:
+        # "Z" for UTC
+        datetime.datetime.strptime(s, '%Y-%m-%dT%H:%M:%S.%fZ')
+    except:
+        # "+02:00" time zone offset
+        # remove the ":" first (%z expects "+0200")
+        x = s[:-3] + s[-2:]
+        datetime.datetime.strptime(x, '%Y-%m-%dT%H:%M:%S.%f%z')
+
+
+FORMAT_MAP = {('string', 'date-time'): parse_datetime}
+
+
 class RequestBodyValidator:
     def __init__(self, schema):
         self.schema = schema
@@ -92,3 +108,12 @@ def validate_schema(self, data, schema) -> flask.Response:
                 logger.error("'%s' is not a '%s'", data, expected_type_name)
                 return problem(400, 'Bad Request',
                                "Wrong type, expected '{}' got '{}'".format(schema_type, actual_type_name))
+
+            schema_format = schema.get('format')
+            func = FORMAT_MAP.get((schema_type, schema_format))
+            if func:
+                try:
+                    func(data)
+                except:
+                    return problem(400, 'Bad Request',
+                                   "Invalid value, expected {} in '{}' format".format(schema_type, schema_format))

tests/fakeapi/api.yaml

@@ -215,6 +215,25 @@ paths:
           description: goodbye response
           schema:
             type: string
+  /test_schema_format:
+    post:
+      summary: Returns empty response
+      description: Returns empty response
+      operationId: fakeapi.hello.schema_format
+      parameters:
+        - name: timestamp
+          required: true
+          in: body
+          schema:
+            type: string
+            format: date-time
+      produces:
+        - application/json
+      responses:
+        200:
+          description: goodbye response
+          schema:
+            type: string
   /test_not_implemented:
     post:
       summary: Returns empty response
@@ -241,4 +260,4 @@ definitions:
         type: string
         description: Docker image version to deploy
     required:
-      - image_version
+      - image_version

tests/fakeapi/hello.py

@@ -62,3 +62,7 @@ def schema():
 
 def schema_list():
     return ''
+
+
+def schema_format():
+    return ''

tests/test_app.py

@@ -279,3 +279,16 @@ def test_schema_list(app):
     wrong_items_response = json.loads(wrong_items.data.decode())  # type: dict
     assert wrong_items_response['title'] == 'Bad Request'
     assert wrong_items_response['detail'] == "Wrong type, expected 'string' got 'int'"
+
+
+def test_schema_format(app):
+    app_client = app.app.test_client()
+    headers = {'Content-type': 'application/json'}
+
+    wrong_type = app_client.post('/v1.0/test_schema_format', headers=headers, data=json.dumps("xy"))  # type: flask.Response
+    assert wrong_type.status_code == 400
+    assert wrong_type.content_type == 'application/problem+json'
+    wrong_type_response = json.loads(wrong_type.data.decode())  # type: dict
+    assert wrong_type_response['title'] == 'Bad Request'
+    assert wrong_type_response['detail'] == "Invalid value, expected string in 'date-time' format"
+