Unverified50% confidenceFactExact time
The browser's native EventSource only supports GET and cannot customize request headers, so AI SDK usually switches to fetch with ReadableStream to manually parse the data stream, and is responsible for concatenating truncated JSON fragments.
1
Sources
50%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedEventSource only supports GET requests and cannot carry a JSON request body; therefore chat-type endpoints that require POST should switch to using fetch to read the stream.76% similarUnverified使用Fetch API的ReadableStream处理流式响应比EventSource更灵活，因为它支持POST请求和自定义请求头，而EventSource只支持GET请求75% similarUnverifiedA fetch-thrown TypeError means the request never reached the server's application layer, incurs no billing, and is the only situation safe to retry in AI API scenarios.69% similarUnverified@ai-sdk/provider-utils provides reusable utilities such as fetch wrappers, JSON Schema validation, and retry logic.68% similarUnverified在 OpenAI API 中，当请求设置 stream: true 时，响应被拆分为多个 SSE 事件，每个事件包含一个 JSON chunk，choices[0].delta 字段包含增量生成内容，流的结束由 data: [DONE] 标记信号指示65% similar
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