movidas las vistas dedicadas al login hacia el archivo auth.py para mayor coherencia

www/auth.py

@@ -0,0 +1,64 @@
+import functools
+
+from www.db import get_db
+
+from werkzeug.exceptions import abort
+from werkzeug.security import check_password_hash
+
+from flask import Blueprint, request, flash, render_template, session, g, redirect, url_for
+
+
+bp = Blueprint('auth', __name__, url_prefix='/auth')
+
+@bp.route('/login', methods=('GET', 'POST'))
+def login():
+    if request.method == 'POST':
+        username = request.form['username']
+        password = request.form['password']
+
+        db = get_db()
+        error = None
+
+        user = db.execute(
+            'SELECT * FROM users WHERE username = ?', (username,)
+        ).fetchone()
+
+        if user is None:
+            error = 'Incorrect username.'
+        elif not check_password_hash(user['password'], password):
+            error = 'Incorrect password.'
+
+        if error is None:
+            session.clear()
+            session['user_id'] = user['id']
+            return redirect(url_for('index'))
+
+        flash(error)
+
+    return render_template('auth/login.html')
+
+@bp.route('/logout')
+def logout():
+    session.clear()
+    return redirect(url_for('index'))
+
+@bp.before_app_request
+def load_logged_in_user():
+    user_id = session.get('user_id')
+
+    if user_id is None:
+        g.user = None
+    else:
+        g.user = get_db().execute(
+            'SELECT * FROM users WHERE id = ?', (user_id,)
+        ).fetchone()
+
+def admin_required(view):
+    @functools.wraps(view)
+    def wrapped_view(**kwargs):
+        if g.user is None:
+            return redirect(abort(404))
+
+        return view(**kwargs)
+
+    return wrapped_view