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This guide explains FastAPI’s full application lifecycle—including startup initialization, middleware handling, request processing steps, background tasks, and graceful shutdown—so developers can design, debug, and deploy robust asynchronous APIs efficiently.
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Qunar’s Portal platform consolidates multiple dev‑ops tools into a unified application lifecycle management system, addressing learning overhead, tool switching costs, data inconsistencies, and fragmented operations by providing centralized app information, a single management entry, streamlined releases, and integrated permission control.