Use whitenoise library for static files

app.py

 import tomllib
 
 from flask import Flask
+from whitenoise import WhiteNoise
 
 
 # noinspection PyUnresolvedReferences
@@ -11,6 +12,9 @@ def create_app():
     app.config.from_file("config.toml", load=tomllib.load, text=False)
     app.config["MAX_CONTENT_LENGTH"] *= 1024 * 1024 * 1024  # bytes -> megabytes -> gigabytes
 
+    # static file handling
+    app.wsgi_app = WhiteNoise(app.wsgi_app, root="static/", prefix="static/", max_age=172800)  # 2 days
+
     with open("localisations.toml", "rb") as file:
         localisations = tomllib.load(file)
 

requirements.txt

@@ -2,3 +2,4 @@ av~=10.0.0
 Flask~=2.3.2
 Flask-WTF~=1.1.1
 wtforms[email]~=3.0.1
+whitenoise~=6.5.0
\ No newline at end of file

routes.py

@@ -2,7 +2,7 @@ import json
 from os import path, makedirs
 from uuid import uuid4
 
-from flask import current_app, render_template, send_from_directory, abort, url_for, redirect, request
+from flask import current_app, render_template, abort, url_for, redirect, request
 
 from forms import UploadForm
 
@@ -62,11 +62,6 @@ def default():
     return redirect(url_for("upload", language="de"))
 
 
-@current_app.route("/static/<path:name>")
-def download_file(name):
-    return send_from_directory("static", name)
-
-
 def set_language(language):
     if language not in current_app.config["ENABLED_LOCALISATIONS"]:
         abort(404)