providers/app_gw: fix URL Validation not working for internal and external host

passbook/providers/app_gw/migrations/0003_auto_20200801_1752.py

@@ -0,0 +1,32 @@
+# Generated by Django 3.0.8 on 2020-08-01 17:52
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("passbook_providers_app_gw", "0002_auto_20200726_1745"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="applicationgatewayprovider",
+            name="external_host",
+            field=models.TextField(
+                validators=[
+                    django.core.validators.URLValidator(schemes=("http", "https"))
+                ]
+            ),
+        ),
+        migrations.AlterField(
+            model_name="applicationgatewayprovider",
+            name="internal_host",
+            field=models.TextField(
+                validators=[
+                    django.core.validators.URLValidator(schemes=("http", "https"))
+                ]
+            ),
+        ),
+    ]

passbook/providers/app_gw/models.py

@@ -17,8 +17,12 @@ class ApplicationGatewayProvider(Provider):
     Protocols by using a Reverse-Proxy."""
 
     name = models.TextField()
-    internal_host = models.TextField(validators=[URLValidator])
+    internal_host = models.TextField(
-    external_host = models.TextField(validators=[URLValidator])
+        validators=[URLValidator(schemes=("http", "https"))]
+    )
+    external_host = models.TextField(
+        validators=[URLValidator(schemes=("http", "https"))]
+    )
 
     client = models.ForeignKey(Client, on_delete=models.CASCADE)