使用Python requests向S3分片上传时遭遇SSLError问题求助

我正在编写Python脚本，通过预签名URL将5GB+的大文件上传至S3存储桶。该功能的JavaScript版本可正常运行，因此逻辑和端点应该是有效的。

针对文件的每个分片，我会获取一个预签名分片上传URL，然后尝试向该URL发送PUT请求：

offset = 0
part_number = 0
with open(file_path, 'rb') as f:
     while offset < file_size_bytes:
          # 获取当前分片的预签名URL
          get_multipart_upload_url_params = {
               "partNumber": part_number,
               "uploadId": upload_id,
               "Key": file_key,
          }
          get_multipart_upload_url_response = requests.get(GET_MULTIPART_UPLOAD_URL_ENDPOINT, params=get_multipart_upload_url_params)

          if 'uploadURL' not in get_multipart_upload_url_response.json():
               print("Error: Upload Part URL not found in response")
               sys.exit(1)

          chunk_upload_url = get_multipart_upload_url_response.json()['uploadURL']

          # 上传分片
          remaining_bytes = file_size_bytes - offset
          chunk_size = min(MAX_CHUNK_SIZE, remaining_bytes)
          chunk = f.read(chunk_size)
          if not chunk:
               break

          response = requests.put(chunk_upload_url, data=chunk)
          ...

执行requests.put时，遇到如下错误：

urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='bucket-name.s3.amazonaws.com', port=443): Max retries exceeded with url: [PRESIGNED URL REDACTED] (Caused by SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:2426)')))

更奇怪的是，使用相同接口实现的单分片上传功能完全正常：

# 获取预签名上传URL
upload_response = requests.get(SINGLE_PART_UPLOAD_API_ENDPOINT, params={
    'filename': filename,
}).json()

if 'uploadURL' not in upload_response or 'Key' not in upload_response:
    print("Error: Upload URL or file key not found in response")
    sys.exit(1)

upload_url = upload_response['uploadURL']
file_key = upload_response['Key']

# 使用requests上传文件
print(f"Uploading: {file_path}")
with open(file_path, 'rb') as f:
    response = requests.put(upload_url, data=f, headers={"Content-Type": "application/octet-stream"})
...

我已经尝试过以下解决方法：

• 打印预签名分片上传URL并仔细检查其有效性
• 通过浏览器请求确认S3存储桶URL可正常解析
• 更换其他请求库
• 在不同计算机上运行脚本
• 升级OpenSSL、requests和urllib3

内容的提问来源于stack exchange，提问作者Ben K.