Increase visibility of error message when action fails due to HTTP request error

pytest.ini

@@ -5,7 +5,6 @@ filterwarnings =
     ignore::DeprecationWarning
     ignore::ResourceWarning
 
-# --capture=no - disable per-test capture
 # --tb=long sets the length of the traceback in case of failures
-addopts = --capture=no --tb=long --verbose
+addopts = --tb=long --verbose
 pythonpath = reportsizedeltas

reportsizedeltas/reportsizedeltas.py

@@ -630,19 +630,26 @@ def raw_http_request(self, url: str, data: bytes | None = None):
         request = urllib.request.Request(url=url, headers=headers, data=data)
 
         retry_count = 0
-        while retry_count <= maximum_urlopen_retries:
-            retry_count += 1
+        while True:
             try:
                 # The rate limit API is not subject to rate limiting
                 if url.startswith("https://api.github.com") and not url.startswith("https://api.github.com/rate_limit"):
                     self.handle_rate_limiting()
                 return urllib.request.urlopen(url=request)
-            except Exception as exception:
-                if not determine_urlopen_retry(exception=exception):
-                    raise exception
+            except urllib.error.HTTPError as exception:
+                if determine_urlopen_retry(exception=exception):
+                    if retry_count < maximum_urlopen_retries:
+                        retry_count += 1
+                        continue
+                    else:
+                        # Maximum retries reached without successfully opening URL
+                        print("Maximum number of URL load retries exceeded")
+
+                print(f"::error::{exception.__class__.__name__}: {exception}")
+                for line in exception.fp:
+                    print(line.decode(encoding="utf-8", errors="ignore"))
 
-        # Maximum retries reached without successfully opening URL
-        raise TimeoutError("Maximum number of URL load retries exceeded")
+                raise exception
 
     def handle_rate_limiting(self) -> None:
         """Check whether the GitHub API request limit has been reached.
@@ -664,7 +671,7 @@ def handle_rate_limiting(self) -> None:
             sys.exit(0)
 
 
-def determine_urlopen_retry(exception) -> bool:
+def determine_urlopen_retry(exception: urllib.error.HTTPError) -> bool:
     """Determine whether the exception warrants another attempt at opening the URL.
     If so, delay then return True. Otherwise, return False.
 

reportsizedeltas/tests/test_reportsizedeltas.py

@@ -901,14 +901,16 @@ def test_raw_http_request(mocker):
     urllib.request.urlopen.assert_called_once_with(url=request)
 
     # urllib.request.urlopen() has non-recoverable exception
-    urllib.request.urlopen.side_effect = Exception()
+    urllib.request.urlopen.side_effect = urllib.error.HTTPError(
+        url="http://example.com", code=404, msg="", hdrs=None, fp=None
+    )
     mocker.patch("reportsizedeltas.determine_urlopen_retry", autospec=True, return_value=False)
-    with pytest.raises(expected_exception=Exception):
+    with pytest.raises(expected_exception=urllib.error.HTTPError):
         report_size_deltas.raw_http_request(url=url, data=data)
 
     # urllib.request.urlopen() has potentially recoverable exceptions, but exceeds retry count
     reportsizedeltas.determine_urlopen_retry.return_value = True
-    with pytest.raises(expected_exception=TimeoutError):
+    with pytest.raises(expected_exception=urllib.error.HTTPError):
         report_size_deltas.raw_http_request(url=url, data=data)