Fix flask bug with duplicate values in form body

aikido_zen/sources/flask/extract_form_data.py

@@ -1,16 +1,29 @@
+from typing import Dict, List
+
 from aikido_zen.context import get_current_context
 from aikido_zen.helpers.logging import logger
 
 
 def extract_form_data_from_flask_request_and_save_data(req):
     """Extract form data from flask request"""
     context = get_current_context()
+    if not context:
+        return
     try:
-        if context:
-            if req.form:
-                context.set_body(req.form)
-            else:
-                context.set_body(req.data.decode("utf-8"))
-            context.set_as_current_context()
+        # https://flask.palletsprojects.com/en/stable/api/#flask.Request
+        # req.form is an ImmutableMultiDict, we will try and extract all values for a certain key
+        if req.form:
+            form_data: Dict[str, List] = {}
+
+            # Extract to a dict of lists
+            for key, value in req.form.items(multi=True):
+                if not key in form_data:
+                    form_data[key] = list()
+                form_data[key].append(value)
+
+            context.set_body(form_data)
+        else:
+            context.set_body(req.data.decode("utf-8"))
+        context.set_as_current_context()
     except Exception as e:
         logger.debug("Exception occurred whilst extracting flask body data: %s", e)