fix: Update exception file get download URL (#866)

* fix: Update exception file get download URL

* fix: Update exception file get download URL

boxsdk/object/file.py

@@ -2,6 +2,7 @@
 import os
 from datetime import datetime
 from typing import TYPE_CHECKING, Optional, Tuple, Union, IO, Iterable, List, Any
+from boxsdk.exception import BoxException
 
 from boxsdk.util.datetime_formatter import normalize_date_to_rfc3339_format
 from .item import Item
@@ -177,6 +178,9 @@ def get_download_url(self, file_version: Optional['FileVersion'] = None) -> str:
             expect_json_response=False,
             allow_redirects=False,
         )
+        if 'location' not in box_response.headers:
+            raise BoxException('Download URL is not present in the response.')
+
         return box_response.headers['location']
 
     @api_call

test/unit/object/test_file.py

@@ -8,7 +8,7 @@
 from pytest_lazyfixture import lazy_fixture
 
 from boxsdk.config import API
-from boxsdk.exception import BoxAPIException
+from boxsdk.exception import BoxAPIException, BoxException
 from boxsdk.object.comment import Comment
 from boxsdk.object.file import File
 from boxsdk.object.file_version import FileVersion
@@ -237,6 +237,20 @@ def test_get_download_url(test_file, mock_box_session):
     assert url == download_url
 
 
+def test_get_download_url_failed(test_file, mock_box_session):
+    expected_url = f'{API.BASE_API_URL}/files/{test_file.object_id}/content'
+    mock_box_session.get.return_value.headers = {}
+    with pytest.raises(BoxException) as exc_info:
+        test_file.get_download_url()
+    assert exc_info.value.args[0] == 'Download URL is not present in the response.'
+    mock_box_session.get.assert_called_once_with(
+        expected_url,
+        params=None,
+        expect_json_response=False,
+        allow_redirects=False
+    )
+
+
 def test_get_download_url_file_version(test_file, test_file_version, mock_box_session):
     expected_url = f'{API.BASE_API_URL}/files/{test_file.object_id}/content'
     download_url = 'https://dl.boxcloud.com/sdjhfgksdjfgshdbg'