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feat: add configuration loader for .env and JSON files

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- Add ConfigLoader class for loading RateLimitConfig and GlobalConfig
- Support .env files with FASTAPI_TRAFFIC_* prefixed variables
- Support JSON configuration files with type validation
- Add convenience functions: load_rate_limit_config, load_global_config
- Add load_rate_limit_config_from_env, load_global_config_from_env
- Support custom environment variable prefixes
- Add comprehensive error handling with ConfigurationError
- Add 47 tests for configuration loading
- Add example 11_config_loader.py with 9 usage patterns
- Update examples/README.md with config loader documentation
- Update CHANGELOG.md with new feature
- Fix typo in limiter.py (errant 'fi' on line 4)
This commit is contained in:
Zane Walker
2026-02-01 13:59:32 +00:00
parent 6c5584c6b4
commit fb23e3c7cf
8 changed files with 1665 additions and 24 deletions
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CHANGELOG.md
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@@ -8,6 +8,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]
### Added
- **Configuration Loader** - Load rate limiting configuration from external files:
- `ConfigLoader` class for loading `RateLimitConfig` and `GlobalConfig`
- Support for `.env` files with `FASTAPI_TRAFFIC_*` prefixed variables
- Support for JSON configuration files
- Environment variable loading with `load_rate_limit_config_from_env()` and `load_global_config_from_env()`
- Auto-detection of file format with `load_rate_limit_config()` and `load_global_config()`
- Custom environment variable prefix support
- Type validation and comprehensive error handling
- 47 new tests for configuration loading
- Example `11_config_loader.py` demonstrating all configuration loading patterns
- `get_stats()` method to `MemoryBackend` for consistency with `RedisBackend`
- Comprehensive test suite with 134 tests covering:
- All five rate limiting algorithms with timing and concurrency tests