fix(streaming): raise on thread error events

src/openai/_streaming.py

@@ -19,6 +19,22 @@
 _T = TypeVar("_T")
 
 
+def _raise_if_stream_error(data: object, response: httpx.Response) -> None:
+    if is_mapping(data) and data.get("error"):
+        message = None
+        error = data.get("error")
+        if is_mapping(error):
+            message = error.get("message")
+        if not message or not isinstance(message, str):
+            message = "An error occurred during streaming"
+
+        raise APIError(
+            message=message,
+            request=response.request,
+            body=data["error"],
+        )
+
+
 class Stream(Generic[_T]):
     """Provides the core interface to iterate over a synchronous stream response."""
 
@@ -64,36 +80,12 @@ def __stream__(self) -> Iterator[_T]:
                 if sse.event and sse.event.startswith("thread."):
                     data = sse.json()
 
-                    if sse.event == "error" and is_mapping(data) and data.get("error"):
-                        message = None
-                        error = data.get("error")
-                        if is_mapping(error):
-                            message = error.get("message")
-                        if not message or not isinstance(message, str):
-                            message = "An error occurred during streaming"
-
-                        raise APIError(
-                            message=message,
-                            request=self.response.request,
-                            body=data["error"],
-                        )
+                    _raise_if_stream_error(data, response)
 
                     yield process_data(data={"data": data, "event": sse.event}, cast_to=cast_to, response=response)
                 else:
                     data = sse.json()
-                    if is_mapping(data) and data.get("error"):
-                        message = None
-                        error = data.get("error")
-                        if is_mapping(error):
-                            message = error.get("message")
-                        if not message or not isinstance(message, str):
-                            message = "An error occurred during streaming"
-
-                        raise APIError(
-                            message=message,
-                            request=self.response.request,
-                            body=data["error"],
-                        )
+                    _raise_if_stream_error(data, response)
 
                     yield process_data(data=data, cast_to=cast_to, response=response)
 
@@ -167,36 +159,12 @@ async def __stream__(self) -> AsyncIterator[_T]:
                 if sse.event and sse.event.startswith("thread."):
                     data = sse.json()
 
-                    if sse.event == "error" and is_mapping(data) and data.get("error"):
-                        message = None
-                        error = data.get("error")
-                        if is_mapping(error):
-                            message = error.get("message")
-                        if not message or not isinstance(message, str):
-                            message = "An error occurred during streaming"
-
-                        raise APIError(
-                            message=message,
-                            request=self.response.request,
-                            body=data["error"],
-                        )
+                    _raise_if_stream_error(data, response)
 
                     yield process_data(data={"data": data, "event": sse.event}, cast_to=cast_to, response=response)
                 else:
                     data = sse.json()
-                    if is_mapping(data) and data.get("error"):
-                        message = None
-                        error = data.get("error")
-                        if is_mapping(error):
-                            message = error.get("message")
-                        if not message or not isinstance(message, str):
-                            message = "An error occurred during streaming"
-
-                        raise APIError(
-                            message=message,
-                            request=self.response.request,
-                            body=data["error"],
-                        )
+                    _raise_if_stream_error(data, response)
 
                     yield process_data(data=data, cast_to=cast_to, response=response)
 

tests/test_streaming_errors.py

@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+from typing import Iterator, AsyncIterator
+
+import httpx
+import pytest
+
+from openai import OpenAI, AsyncOpenAI
+from openai._exceptions import APIError
+from openai._streaming import Stream, AsyncStream
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("sync", [True, False], ids=["sync", "async"])
+async def test_thread_event_error_raises(sync: bool, client: OpenAI, async_client: AsyncOpenAI) -> None:
+    def body() -> Iterator[bytes]:
+        yield b"event: thread.error\n"
+        yield b'data: {"error": {"message": "boom"}}\n'
+        yield b"\n"
+
+    iterator = make_stream_iterator(content=body(), sync=sync, client=client, async_client=async_client)
+
+    with pytest.raises(APIError, match="boom"):
+        await iter_next(iterator)
+
+
+async def to_aiter(iter: Iterator[bytes]) -> AsyncIterator[bytes]:
+    for chunk in iter:
+        yield chunk
+
+
+async def iter_next(iter: Iterator[object] | AsyncIterator[object]) -> object:
+    if isinstance(iter, AsyncIterator):
+        return await iter.__anext__()
+
+    return next(iter)
+
+
+def make_stream_iterator(
+    content: Iterator[bytes],
+    *,
+    sync: bool,
+    client: OpenAI,
+    async_client: AsyncOpenAI,
+) -> Iterator[object] | AsyncIterator[object]:
+    request = httpx.Request("GET", "http://test")
+    if sync:
+        response = httpx.Response(200, request=request, content=content)
+        return iter(Stream(cast_to=object, client=client, response=response))
+
+    response = httpx.Response(200, request=request, content=to_aiter(content))
+    return AsyncStream(cast_to=object, client=async_client, response=response).__aiter__()