fix: gevent uncompatibility

src/__init__.py

@@ -31,10 +31,11 @@ def create_app():
             cors_allowed_origins=Keys.get("CORS_ALLOWED_ORIGIN"),
             logger=True,
             engineio_logger=False,
+            async_mode='gevent'
         )
     else:
         socketio.init_app(
-            app, cors_allowed_origins="*", logger=True, engineio_logger=False
+            app, cors_allowed_origins="*", logger=True, engineio_logger=False, async_mode='gevent'
         )
         CORS(
             app,

src/singleplayer/api.py

@@ -24,6 +24,7 @@
 from flask import Blueprint, current_app, request, session
 from werkzeug.security import generate_password_hash, check_password_hash
 from werkzeug import exceptions as excp
+import traceback
 
 
 singleplayer = Blueprint("singleplayer", __name__)
@@ -222,19 +223,22 @@ def get_n_drawings_by_label():
     """
     Returns n images from the blob storage container with the given label.
     """
-    data = request.get_json()
-    number_of_images = data["number_of_images"]
-    label = data["label"]
-    lang = data["lang"]
-    if lang == "NO":
-        label = shared_models.to_english(label)
-
-    image_urls = shared_models.get_n_random_example_images(
-        label, number_of_images
-    )
-    images = storage.get_images_from_relative_url(image_urls)
-    return json.dumps(images), 200
-
+    try:
+        data = request.get_json()
+        number_of_images = data["number_of_images"]
+        label = data["label"]
+        lang = data["lang"]
+        if lang == "NO":
+            label = shared_models.to_english(label)
+
+        image_urls = shared_models.get_n_random_example_images(
+            label, number_of_images
+        )
+        images = storage.get_images_from_relative_url(image_urls)
+        return json.dumps(images), 200
+    except RecursionError as e:
+        current_app.logger.error("RecursionError: " + str(e))
+        traceback.print_stack()
 
 @singleplayer.route("/auth", methods=["POST"])
 def authenticate():