Fix #1002, #1581 (Public shelfs not accessible as guest user)

cps/shelf.py

@@ -30,7 +30,7 @@ from sqlalchemy.sql.expression import func
 from sqlalchemy.exc import OperationalError, InvalidRequestError
 
 from . import logger, ub, searched_ids, calibre_db
-from .web import render_title_template
+from .web import login_required_if_no_ano, render_title_template
 
 
 shelf = Blueprint('shelf', __name__)
@@ -341,7 +341,7 @@ def delete_shelf(shelf_id):
 
 @shelf.route("/shelf/<int:shelf_id>", defaults={'shelf_type': 1})
 @shelf.route("/shelf/<int:shelf_id>/<int:shelf_type>")
-@login_required
+@login_required_if_no_ano
 def show_shelf(shelf_type, shelf_id):
     shelf = ub.session.query(ub.Shelf).filter(ub.Shelf.id == shelf_id).first()