or malformed SSE response).

🔍 报错分析

1. 🌐 错误翻译

原文：API call failed after 3 retries: Provider returned an empty stream with no finish_reason (possible upstream error or malformed SSE response).
译文：API调用在3次重试后失败：提供方返回了一个空的数据流，且没有finish_reason（可能上游错误或SSE响应格式错误）。

2. 🎯 原因分析

3. 💡 解决方案

import time
import requests

def call_stream_api(url, headers, params, max_retries=5, base_delay=1):
    for attempt in range(max_retries):
        try:
            response = requests.get(url, headers=headers, params=params, stream=True)
            response.raise_for_status()

            # 处理流式响应，验证是否有有效数据及finish_reason
            has_data = False
            for line in response.iter_lines():
                if line:
                    has_data = True
                    # 解析SSE格式数据（根据实际情况调整解析逻辑）
                    if "finish_reason" in line:
                        return line  # 正常返回结束信号
            if not has_data:
                raise Exception("Empty stream response")
        except Exception as e:
            if attempt == max_retries - 1:
                raise e  # 最后一次重试失败，抛出异常
            delay = base_delay * (2 ** attempt)  # 指数退避延迟
            time.sleep(delay)
    return None

# 调用示例
# call_stream_api("https://api.example.com/stream", headers={...}, params={...})

#### 方案2：检查并确保SSE响应格式规范
若你是API服务提供方，需检查后端流式响应的生成逻辑，确保符合SSE格式规范，在流结束时必须添加finish_reason字段。
示例规范的SSE流式响应格式：

data: {"text": "响应内容", "finish_reason": "stop"}

data: {"text": "响应内容", "finish_reason": "stop"}

4. 🛡️ 预防措施