Ensure trailing slashes are handled correctly

main.py

@@ -1,6 +1,4 @@
-"""
-Main Flask-based app for Slinky
-"""
+"""Main Flask-based app for Slinky."""
 
 from flask import Flask, Response, render_template
 from werkzeug.middleware.proxy_fix import ProxyFix
@@ -15,10 +13,10 @@ app.register_blueprint(slinky_webapp)
 @app.route("/")
 @protect
 def index() -> Response:
-    """
-    Index/Landing page
+    """Index/Landing page.
 
     Returns:
         str: string of page content
+
     """
     return Response(render_template("index.html"), 200)

slinky/web.py

@@ -1,12 +1,11 @@
-"""
-Web component
-"""
+"""Web component."""
 
 import logging
 import os
-from datetime import datetime
+import pathlib
+from datetime import UTC, datetime
 from functools import wraps
-from typing import Any, Callable
+from typing import Callable
 
 import yaml
 from flask import Blueprint, Response, render_template, request
@@ -18,22 +17,18 @@ from slinky import Slinky, random_string
 
 slinky_webapp = Blueprint("webapp", __name__, template_folder="templates")
 
-with open("config.yaml", encoding="utf-8-sig") as conffile:
+with pathlib.Path("config.yaml").open(encoding="utf-8-sig") as conffile:
     cfg = yaml.safe_load(conffile)
 
 
 class DelForm(FlaskForm):
-    """
-    Delete form definition
-    """
+    """Delete form definition."""
 
     delete = HiddenField("delete")
 
 
 class AddForm(FlaskForm):
-    """
-    Add form definition
-    """
+    """Add form definition."""
 
     shortcode = StringField(
         "Shortcode",
@@ -79,18 +74,18 @@ class AddForm(FlaskForm):
 
 
 def protect(func: Callable[..., Response]) -> Callable[..., Response]:
-    """
-    Decorator that will protect the admin interface
+    """Protect the admin interface.
 
     Args:
         func (Callable): Wrapped function
 
     Returns:
         Callable: Function wrapper
+
     """
 
     @wraps(func)
-    def check_ip(*args: Any, **kwargs: Any) -> Response:
+    def check_ip(*args: ..., **kwargs: ...) -> Response:
         remote_addr = request.remote_addr
 
         if "x-forwarded-for" in request.headers:
@@ -99,10 +94,7 @@ def protect(func: Callable[..., Response]) -> Callable[..., Response]:
         if "x-real-ip" in request.headers:
             remote_addr = request.headers["x-real-ip"]
 
-        if (
-            os.environ.get("FLASK_ENV", "") != "development"
-            and remote_addr not in cfg["allowed_ips"]
-        ):
+        if os.environ.get("FLASK_ENV", "") != "development" and remote_addr not in cfg["allowed_ips"]:
             logging.warning("Protected URL access attempt from %s", remote_addr)
             return Response("Not found", 404)
         return func(*args, **kwargs)
@@ -112,28 +104,32 @@ def protect(func: Callable[..., Response]) -> Callable[..., Response]:
 
 @slinky_webapp.route("/<path:path>", strict_slashes=False)
 def try_path_as_shortcode(path: str) -> Response:
-    """
-    Try the initial path as a shortcode, redirect if found
+    """Try the initial path as a shortcode, redirect if found.
 
     Returns:
         Response: redirect if found, otherwise 404
+
     """
+    path = path.strip("/")
     should_redirect = True
     slinky = Slinky(cfg["db"])
     shortcode = slinky.get_by_shortcode(path)
+
     if shortcode.url:
         if shortcode.fixed_views == 0:
             logging.warning("Shortcode out of views")
             should_redirect = False
         elif shortcode.fixed_views > 0:
             slinky.remove_view(shortcode.id)
-        if datetime.fromisoformat(shortcode.expiry) < datetime.now():
+        if datetime.fromisoformat(shortcode.expiry).astimezone(UTC) < datetime.now(UTC):
             logging.warning("Shortcode expired")
             should_redirect = False
 
         if should_redirect:
             return Response(
-                "Redirecting...", status=302, headers={"location": shortcode.url}
+                "Redirecting...",
+                status=302,
+                headers={"location": shortcode.url},
             )
 
     return Response("Not found", 404)
@@ -142,11 +138,11 @@ def try_path_as_shortcode(path: str) -> Response:
 @slinky_webapp.route("/_/add", methods=["GET", "POST"])
 @protect
 def add() -> Response:
-    """
-    Create and add a new shorturl
+    """Create and add a new shorturl.
 
     Returns:
         Response: HTTP response
+
     """
     slinky = Slinky(cfg["db"])
 
@@ -207,11 +203,11 @@ def add() -> Response:
 @slinky_webapp.route("/_/list", methods=["GET", "POST"])
 @protect
 def lister() -> Response:
-    """
-    List the shortcodes, URLs, etc.
+    """List the shortcodes, URLs, etc.
 
     Returns:
         Response: HTTP response
+
     """
     form = DelForm(meta={"csrf": False})
     slinky = Slinky(cfg["db"])
@@ -227,17 +223,17 @@ def lister() -> Response:
 
 @slinky_webapp.route("/_/edit/<int:id>", methods=["GET", "POST"])
 @protect
-def edit(id: int) -> Response:  # pylint: disable=invalid-name,redefined-builtin
-    """
-    Edit the shortcode.
+def edit(shortcut_id: int) -> Response:  # pylint: disable=invalid-name,redefined-builtin
+    """Edit the shortcode.
 
     Returns:
         Response: HTTP response
+
     """
     form = DelForm(meta={"csrf": False})
     slinky = Slinky(cfg["db"])
 
-    logging.debug("Editing: %d", id)
+    logging.debug("Editing: %d", shortcut_id)
 
     if form.is_submitted():
         slinky.delete_by_shortcode(form.delete.data.strip())