$ show falconry/falcon
Falcon is a minimalist Python web framework for building HTTP APIs, supporting both WSGI and ASGI, with optional WebSocket and Server-Sent Events support. The code implements a resource/responder routing model where classes expose on_get/on_post/on_websocket methods, plus middleware, before/after hooks, pluggable media handlers, error handler registries, and static file serving. It has no mandatory runtime dependencies; optional Cython modules accelerate URL/query parsing and buffered stream reads, with pure-Python fallbacks. Architecturally, Falcon is a library rather than a deployable service: applications instantiate falcon.App (WSGI) or falcon.asgi.App (ASGI), register routes, and run under any compatible server. The request pipeline is middleware -> routing -> responder -> response, with native async support and coroutine-wrapping for sync code. The repository also contains a comprehensive serverless testing client, benchmarks against other Python frameworks, tutorial applications, and a large test suite covering CPython 3.9-3.15, PyPy, Cython builds, and multiple ASGI/WSGI servers. Maintenance is active: commits are recent, CI/CD is extensive, contributing guidelines demand 100% branch coverage, and deprecations are tracked for planned removal in Falcon 5.0. The codebase is high-quality and well-structured, though it intentionally carries backward-compatibility shims and some duplicated WSGI/ASGI logic as a maintenance tradeoff. There is no data-research character; benchmark tooling is for performance comparison only.
The LLM identified 4 files worth highlighting for reuse:
Thorough URI and query-string utilities: RFC 3986 percent-encoding, safe path/query string encoding, plus/space handling, and query-string parsing into dicts with comma and list expansion support. Pure utility code with no framework dependencies, directly reusable in HTTP clients, routers, and web servers.
Parses HTTP media type headers, computes quality values, and implements RFC 9110 best-match selection. This is self-contained utility logic that can be lifted into any HTTP client, server, or content-negotiation layer for correct Accept/Accept-* matching.
Reusable helpers for converting between sync and async callables, including sync_to_async, async_to_sync, and wrap_sync_to_async, while preserving execution semantics. This solves a recurring problem when frameworks or libraries need to support both blocking and async handlers without forking code paths.
Implements parsing and normalization of the Forwarded header and legacy X-Forwarded-* headers, including IPv6 handling and access-route extraction. This is self-contained network utility code that can be reused in reverse proxies, security middleware, or request objects that need trustworthy client address and scheme determination.