Intro
If you work with real-time financial tick data via WebSocket long connections, you’ve probably run into frustrating hidden issues:
Connections show as online, but data stops flowing. Adding/removing trading symbols triggers connection storms. Minor network glitches break your data pipeline without obvious error logs.
Today I’ll share a practical Python solution built around single-connection dynamic subscription and heartbeat timeout detection. We use alltick api as our example throughout this post. I’ll cover real production pain points, architecture, full runnable code, common bugs and optimization results. All code can be directly used in your projects.
Real Production Pain Points & Background
