brpc的http server 能支持大量数据上传吗

**Is your feature request related to a problem? (你需要的功能是否与某个问题有关?)**
brpc的http client 支持持续下载， server支持持续发送数据。很好奇为啥反过来不行，有什么gap吗？ 有什么实施方案吗？

**Describe the solution you'd like (描述你期望的解决方法)**

我想的办法还是做http chunk coding，但是brpc的http server好像不支持对收到的一个chunk进行动作。
**Describe alternatives you've considered (描述你想到的折衷方案)**

**Additional context/screenshots (更多上下文/截图)**

The issue names no files, tests, or entry points. Start by tracing brpc's HTTP client continuous-download and server continuous-send paths, then compare them with HTTP server request and chunk handling. Done would require an agreed implementation plan or supported large-upload behavior with coverage for processing incoming chunks.

Written by the indexing model from the issue text.