First error handling in backend

backend/web/login/login.py

@@ -130,13 +130,28 @@ def login():
 
     # Check if we are logged in:
     identity = get_auth()
+    error_message = ""
 
+    error = False
     refresh = False
     flow = request.args.get("flow")
     if flow:
         cookies = request.headers['cookie']
         flow = kratos_public_frontend_api.get_login_flow(flow, cookie=cookies)
         refresh = flow['refresh']
+        try:
+            for msg in flow.ui.messages.value:
+                if msg.id == 4000006:
+                    error_message = "The provided login e-mail address or password is incorrect. Please try again."
+                    error = True
+                else:
+                    if msg.type == 'error':
+                        error_message = msg.text
+                        error = True
+                    else:
+                        current_app.logger.info("Kratos message:" + msg.text)
+        except Exception as ex:
+            current_app.logger.error(ex)
 
     if identity and not refresh:
         # We are already logged in, and don't need to refresh.
@@ -146,7 +161,10 @@ def login():
             name = " " + identity['traits']['name']
         else:
             name = ""
-        return render_template("loggedin.html", api_url=KRATOS_PUBLIC_URL, dashboard_url=DASHBOARD_URL, name=name)
+        return render_template("loggedin.html",
+            api_url=KRATOS_PUBLIC_URL,
+            dashboard_url=DASHBOARD_URL,
+            name=name)
 
     # If we do not have a flow, get one.
     if not flow:
@@ -161,7 +179,9 @@ def login():
     # or `not identity`
     #     User is not logged in yet.
     # In either case, we present the login screen now.
-    return render_template("login.html", api_url=KRATOS_PUBLIC_URL, dashboard_url=DASHBOARD_URL, refresh=refresh, demo=DEMO_INSTANCE)
+    return render_template("login.html", api_url=KRATOS_PUBLIC_URL,
+            dashboard_url=DASHBOARD_URL, refresh=refresh, error=error,
+            error_message=error_message, demo=DEMO_INSTANCE)
 
 
 @web.route("/auth", methods=["GET", "POST"])

backend/web/templates/login.html

@@ -14,6 +14,9 @@
 
 </script>
 
+{% if error %}
+    <div class="alert alert-danger">{{ error_message }}</div>
+{% endif %}
 
 {% if refresh %}
     <div class="alert alert-warning">Please confirm your credentials to complete this action.</div>