Function start

app/api/stream/route.ts:128–136

(controller)

      
      const responseStream = new ReadableStream({
        async start(controller) {
          for await (const chunk of stream) {
            if (chunk.choices[0]?.delta?.content) {
              controller.enqueue(encoder.encode(`data: ${JSON.stringify(chunk)}\n\n`));
            }
          }
          controller.enqueue(encoder.encode("data: [DONE]\n\n"));
          controller.close();
        },
        cancel() {
          // 当流被取消时，关闭 OpenAI 流
          if (stream.controller) {