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fix: handle Responses API event shape in OpenAI stream #586

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fix: handle Responses API event shape in OpenAI stream #586

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18 changes: 13 additions & 5 deletions api/chat/_stream.py
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Original file line number Diff line number Diff line change
Expand Up @@ -165,13 +165,21 @@ async def respond_stream(self, prompt: str) -> AsyncIterator[str]:
)

async for chunk in response:
# Responses API event shape
if getattr(chunk, "type", "") == "response.output_text.delta":
delta = getattr(chunk, "delta", None)
if delta:
yield delta
continue

# Chat Completions chunk shape
choices = getattr(chunk, "choices", None)
if (
chunk.choices
and chunk.choices[0].delta is not None
and chunk.choices[0].delta.content is not None
choices
and choices[0].delta is not None
and choices[0].delta.content is not None
):
yield chunk.choices[0].delta.content

yield choices[0].delta.content

class OpenAIChatStreamer(_OpenAICompatStreamer):
provider = "openai"
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