fix: report should_retry False for a broken-off streamed body, as released

A connection error, timeout or broken chunked body while a streamed
response body is read (document or translation memory export download)
raises ConnectionException with should_retry False again, as in the
released version. These reads are not retried by the SDK; changing the
flag is left to the next major version.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: hive-bot

CHANGELOG.md

@@ -251,17 +251,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - A glossary CSV row without a target term now raises a `ValueError` naming
   the row; previously a bare `IndexError` (it is still an `IndexError`).
-- A connection that is reset or breaks off while the response body is read
-  is now retried like other connection failures, and raises
+- A connection that is reset or breaks off while a non-streamed response body
+  is read is now retried like other connection failures, and raises
   `ConnectionException` with `should_retry` `True` once retries are used up.
   `create_developer_key()` is still not retried after it.
 - `translate_document_download()` now streams the translated document to
   `output_file` in chunks, instead of first reading the whole document into
   memory for the debug log.
 - A connection reset or timeout while `translate_document_download()` or
   `download_translation_memory_export()` reads the downloaded file now raises
-  `ConnectionException` with `should_retry` `True`, instead of a `requests`
-  exception.
+  `ConnectionException`, instead of a `requests` exception.
 - HTTP 3xx responses that are not followed as redirects (e.g. 300, 304, or a
   redirect without `Location`) now raise `DeepLException` with
   `http_status_code`, instead of being parsed as a successful response.

deepl/http_client.py

@@ -330,20 +330,13 @@ def iter_response_content(
         raise _body_read_exception(e) from e
 
 
-_RETRYABLE_BODY_READ_ERRORS = (
-    requests.exceptions.ConnectionError,
-    requests.exceptions.Timeout,
-    requests.exceptions.ChunkedEncodingError,
-)
-
-
 def _body_read_exception(
     e: requests.exceptions.RequestException,
 ) -> ConnectionException:
-    # A reset or timeout is retryable, as in _internal_request.
+    # Not retried; should_retry False until the next major version.
     return ConnectionException(
         f"Connection failed while reading response: {e}",
-        should_retry=isinstance(e, _RETRYABLE_BODY_READ_ERRORS),
+        should_retry=False,
     )
 
 

tests/offline/test_translate_document.py

@@ -594,7 +594,7 @@ def test_raises_connection_exception_when_download_connection_breaks(
             HANDLE, io.BytesIO(), chunk_size=4
         )
 
-    assert exc_info.value.should_retry is True
+    assert exc_info.value.should_retry is False
 
 
 def test_retries_upload_when_rate_limited(mocked):

tests/offline/test_translation_memories.py

@@ -823,7 +823,7 @@ def test_raises_connection_exception_when_export_download_connection_breaks(
             job, io.BytesIO(), chunk_size=2
         )
 
-    assert exc_info.value.should_retry is True
+    assert exc_info.value.should_retry is False
 
 
 def test_raises_when_downloading_export_without_download_url():