limit length of response status line for _exc_with_message in forklift/legacy (#10508)

* limit length of response status line for _exc_with_message in forklift/legacy

* Update warehouse/forklift/legacy.py

Co-authored-by: Dustin Ingram <[email protected]>

* fix test

Co-authored-by: Dustin Ingram <[email protected]>

Author: ewdurbin

tests/unit/forklift/test_legacy.py

@@ -943,7 +943,11 @@ def test_fails_invalid_version(self, pyramid_config, pyramid_request, version):
                     "md5_digest": "a fake md5 digest",
                     "summary": "A" * 513,
                 },
-                "'" + "A" * 513 + "' is an invalid value for Summary. "
+                "'"
+                + "A" * 30
+                + "..."
+                + "A" * 30
+                + "' is an invalid value for Summary. "
                 "Error: Field cannot be longer than 512 characters. "
                 "See "
                 "https://packaging.python.org/specifications/core-metadata"

warehouse/forklift/legacy.py

@@ -869,7 +869,12 @@ def file_upload(request):
             if field.description and isinstance(field, wtforms.StringField):
                 error_message = (
                     "{value!r} is an invalid value for {field}. ".format(
-                        value=field.data, field=field.description
+                        value=(
+                            field.data[:30] + "..." + field.data[-30:]
+                            if len(field.data) > 60
+                            else field.data
+                        ),
+                        field=field.description,
                     )
                     + "Error: {} ".format(form.errors[field_name][0])
                     + "See "