Ensure sessions are closed

main.py

@@ -1,8 +1,8 @@
 """
 Main Flask-based app for Slinky
 """
-from flask import Flask, render_template
+from flask import Flask, Response, render_template
-from flask_bootstrap import Bootstrap
+from flask_bootstrap import Bootstrap  # type: ignore[import]
 
 from slinky.web import protect, slinky_webapp
 
@@ -14,11 +14,11 @@ Bootstrap(app)
 
 @app.route('/')
 @protect
-def index() -> str:
+def index() -> Response:
     """
     Index/Landing page
 
     Returns:
         str: string of page content
     """
-    return render_template('index.html')
+    return Response(render_template('index.html'), 200)

slinky/__init__.py

@@ -8,7 +8,7 @@ from dataclasses import dataclass
 from datetime import datetime
 from typing import Optional
 
-import sqlalchemy
+import sqlalchemy  # type: ignore[import]
 
 from slinky import db
 
@@ -82,6 +82,7 @@ class Slinky:
         )
         self.session.add(dbentry)
         self.session.commit()
+        self.session.close()
 
         return shortcode
 
@@ -98,13 +99,15 @@ class Slinky:
         entry = self.session.query(db.ShortURL).filter_by(shortcode=shortcode).first()
 
         if entry:
-            return Shortcode(
+            ret_sc = Shortcode(
                 entry.id,
                 entry.shortcode,
                 entry.url,
                 entry.fixed_views,
                 entry.expiry,
             )
+            self.session.close()
+            return ret_sc
         return Shortcode(0, '', '', 0, '1970-01-01 00:00:00.000000')
 
     def remove_view(self, sc_id: int) -> None:
@@ -118,6 +121,7 @@ class Slinky:
             {db.ShortURL.fixed_views: db.ShortURL.fixed_views - 1}
         )
         self.session.commit()
+        self.session.close()
 
     def get_all(self) -> list[Shortcode]:
         """
@@ -129,7 +133,9 @@ class Slinky:
         Returns:
             Shortcode: full Shortcode object for the given shortcode
         """
-        return list(self.session.query(db.ShortURL).all())
+        shortcodes = list(self.session.query(db.ShortURL).all())
+        self.session.close()
+        return shortcodes
 
     def delete_by_shortcode(self, shortcode: str) -> None:
         """
@@ -142,3 +148,4 @@ class Slinky:
 
         self.session.delete(entry)
         self.session.commit()
+        self.session.close()

slinky/db.py

@@ -3,9 +3,9 @@ DB component
 """
 from dataclasses import dataclass
 
-from sqlalchemy import Column, Integer, String, create_engine
+from sqlalchemy import Column, Integer, String, create_engine  # type: ignore[import]
-from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.ext.declarative import declarative_base  # type: ignore[import]
-from sqlalchemy.orm import Session, sessionmaker
+from sqlalchemy.orm import Session, sessionmaker  # type: ignore[import]
 
 Base = declarative_base()
 

slinky/web.py

@@ -8,11 +8,11 @@ from functools import wraps
 from typing import Any, Callable
 
 import yaml
-from flask import Blueprint, Response, redirect, render_template, request
+from flask import Blueprint, Response, render_template, request
-from flask_wtf import FlaskForm
+from flask_wtf import FlaskForm  # type: ignore[import]
-from wtforms import DateTimeLocalField, HiddenField, IntegerField, StringField
+from wtforms import HiddenField  # type: ignore[import]
-from wtforms.validators import DataRequired, Length
+from wtforms import DateTimeLocalField, IntegerField, StringField
-
+from wtforms.validators import DataRequired, Length  # type: ignore[import]
 from slinky import Slinky
 
 slinky_webapp = Blueprint('webapp', __name__, template_folder='templates')
@@ -112,7 +112,7 @@ def try_path_as_shortcode(path: str) -> Response:
             should_redirect = False
 
         if should_redirect:
-            return redirect(shortcode.url, 302)
+            return Response('Redirecting...', status=302, headers={'location': shortcode.url})
 
     return Response('Not found', 404)
 
@@ -124,7 +124,7 @@ def add() -> Response:
     Create and add a new shorturl
 
     Returns:
-        str: HTTP response
+        Response: HTTP response
     """
     shortcode = ''
     url = ''
@@ -150,7 +150,7 @@ def add() -> Response:
         else:
             return Response('Could not create a unique shortcode', 500)
 
-    return render_template('add.html', form=form, shortcode=shortcode)
+    return Response(render_template('add.html', form=form, shortcode=shortcode), 200)
 
 
 @slinky_webapp.route('/_/list', methods=['GET', 'POST'])
@@ -160,7 +160,7 @@ def lister() -> Response:
     List the shortcodes, URLs, etc.
 
     Returns:
-        str: shortcode for the URL
+        Response: HTTP response
     """
     form = DelForm(meta={'csrf': False})
     slinky = Slinky(cfg['db'])
@@ -168,4 +168,7 @@ def lister() -> Response:
     if form.is_submitted():
         slinky.delete_by_shortcode(form.delete.data.strip())
 
-    return render_template('list.html', form=form, shortcodes=slinky.get_all())
+    return Response(
+        render_template('list.html', form=form, shortcodes=slinky.get_all()),
+        200,
+    )