add Flask error handlers

atst/routes/__init__.py

@@ -1,4 +1,4 @@
-from flask import Blueprint, render_template, g, redirect, session, url_for, request
+from flask import Blueprint, abort, render_template, g, redirect, session, url_for, request
 from flask import current_app as app
 import pendulum
 
@@ -39,15 +39,7 @@ def login_redirect():
 
         return redirect(url_for("atst.home"))
     else:
-        return redirect(url_for("atst.unauthorized"))
-
-
-@bp.route("/unauthorized")
-def unauthorized():
-    template = render_template('unauthorized.html')
-    response = app.make_response(template)
-    response.status_code = 401
-    return response
+        return abort(401)
 
 
 def _is_valid_certificate(request):

atst/routes/errors.py

@@ -0,0 +1,13 @@
+from flask import render_template
+
+
+def make_error_pages(app):
+    @app.errorhandler(404)
+    def not_found(e):
+        return render_template("not_found.html"), 404
+
+
+    @app.errorhandler(401)
+    def unauthorized(e):
+        return render_template('unauthorized.html'), 401
+

atst/routes/requests/requests_form.py

@@ -1,4 +1,4 @@
-from flask import g, redirect, render_template, url_for, request as http_request
+from flask import abort, g, redirect, render_template, url_for, request as http_request
 
 from . import requests_bp
 from atst.domain.requests import Requests
@@ -27,7 +27,7 @@ def requests_form_new(screen):
 @requests_bp.route("/requests/new/<int:screen>/<string:request_id>", methods=["GET"])
 def requests_form_update(screen=1, request_id=None):
     if request_id and not _can_view_request(request_id):
-        return redirect(url_for("atst.unauthorized"))
+        abort(404)
 
     request = Requests.get(request_id) if request_id is not None else None
     jedi_flow = JEDIRequestFlow(screen, request, request_id=request_id)