Handle null statuses in http_status_to_status_code (#823)

CHANGELOG.md

@@ -64,6 +64,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- `opentelemetry-instrumentation-urllib` Fixed an error on unexpected status values.
+  ([#823](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/823))
+
 - `opentelemetry-exporter-richconsole` Fixed attribute error on parentless spans.
   ([#782](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/782))
 

opentelemetry-instrumentation/src/opentelemetry/instrumentation/utils.py

@@ -49,6 +49,9 @@ def http_status_to_status_code(
         status (int): HTTP status code
     """
     # See: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/http.md#status
+    if not isinstance(status, int):
+        return StatusCode.UNSET
+
     if status < 100:
         return StatusCode.ERROR
     if status <= 299:

opentelemetry-instrumentation/tests/test_utils.py

@@ -56,6 +56,12 @@ def test_http_status_to_status_code(self):
                 actual = http_status_to_status_code(int(status_code))
                 self.assertEqual(actual, expected, status_code)
 
+    def test_http_status_to_status_code_none(self):
+        for status_code, expected in ((None, StatusCode.UNSET),):
+            with self.subTest(status_code=status_code):
+                actual = http_status_to_status_code(status_code)
+                self.assertEqual(actual, expected, status_code)
+
     def test_http_status_to_status_code_redirect(self):
         for status_code, expected in (
             (HTTPStatus.MULTIPLE_CHOICES, StatusCode.ERROR),