Added stripping of whitespace for SlugField and URLField

django/forms/fields.py

@@ -670,6 +670,10 @@ class URLField(CharField):
             value = urlunsplit(url_fields)
         return value
 
+    def clean(self, value):
+        value = self.to_python(value).strip()
+        return super(URLField, self).clean(value)
+
 
 class BooleanField(Field):
     widget = CheckboxInput
@@ -1105,3 +1109,7 @@ class GenericIPAddressField(CharField):
 
 class SlugField(CharField):
     default_validators = [validators.validate_slug]
+
+    def clean(self, value):
+        value = self.to_python(value).strip()
+        return super(SlugField, self).clean(value)

tests/forms_tests/tests/test_extra.py

@@ -569,6 +569,14 @@ class FormsExtraTestCase(TestCase, AssertFormErrorsMixin):
         f = GenericIPAddressField(unpack_ipv4=True)
         self.assertEqual(f.clean(' ::ffff:0a0a:0a0a'), '10.10.10.10')
 
+    def test_slugfield_normalization(self):
+        f = SlugField()
+        self.assertEqual(f.clean('    aa-bb-cc    '), 'aa-bb-cc')
+
+    def test_urlfield_normalization(self):
+        f = URLField()
+        self.assertEqual(f.clean('http://example.com/     '), 'http://example.com/')
+
     def test_smart_text(self):
         class Test:
             if six.PY3: