Add logged_out redirect (#227)

files/routes/static.py

@@ -16,6 +16,24 @@ def rdrama(id, title):
 	id = ''.join(f'{x}/' for x in id)
 	return redirect(f'/archives/drama/comments/{id}{title}.html')
 
+@app.get('/logged_out/')
+@app.get('/logged_out/<path:old>')
+def logged_out(old = ""):
+        # Remove trailing question mark from request.full_path which flask adds if there are no query parameters
+        redirect_url = request.full_path.replace("/logged_out", "", 1)
+        if redirect_url.endswith("?"):
+            redirect_url = redirect_url[:-1]
+
+        # Handle cases like /logged_out?asdf by adding a slash to the beginning
+        if not redirect_url.startswith('/'):
+            redirect_url = f"/{redirect_url}"
+
+        # Prevent redirect loop caused by visiting /logged_out/logged_out/logged_out/etc...
+        if redirect_url.startswith('/logged_out'):
+            abort(400)
+
+        return redirect(redirect_url)
+
 @app.get("/privacy")
 @auth_required
 def privacy(v):
@@ -438,4 +456,4 @@ def googleplayapp():
 @app.post("/dismiss_mobile_tip")
 def dismiss_mobile_tip():
 	session["tooltip_last_dismissed"] = int(time.time())
-	return "", 204
+	return "", 204