没有，上证所无法发送任何数据到服务器。

No, SSE cannot send any data to the server.

您仍然可以使用上证所读取实时数据和使用AJAX上传任何数据（可能需要一个共享的数据库，通过AJAX接收流程和SSE-再送一间信息）。

You can still use SSE to read data in real time and use AJAX to upload any data (you might need a shared database to pass information between AJAX-receiving processes and SSE-sending one).