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@@ -4,27 +4,81 @@ We [keep a changelog.](http://keepachangelog.com/)
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## [Unreleased]
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## [1.7.0] - 2026-04-XX
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### Added
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- Explicit `__all__` declaration in `mailgun.client` to cleanly isolate the public API namespace.
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- A `__repr__` method to the `Client` and `BaseEndpoint` classes to improve developer experience (DX) during console debugging (showing target routes instead of memory addresses).
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- Security guardrail (CWE-319) in `Config` that logs a warning if a cleartext `http://` API URL is configured.
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- Python 3.14 support to the GitHub Actions test matrix.
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- Implemented Smart Logging (telemetry) in `Client` and `AsyncClient` to help users debug API requests, generated URLs, and server errors (`404`, `400`, `429`).
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- Added a new "Logging & Debugging" section to `README.md`.
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- Smart Webhook Routing: Implemented payload-based routing for domain webhooks. The SDK dynamically routes to `v1`, `v3`, or `v4` endpoints based on the HTTP method and presence of parameters like `event_types` or `url`.
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- Deprecation Interceptor: Added a registry and interception hook that emits non-breaking `DeprecationWarning`s and logs when utilizing obsolete Mailgun APIs (e.g., v3 validations, legacy tags, v1 bounce-classification).
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- Added `build_path_from_keys` utility in `mailgun.handlers.utils` to centralize and dry up URL path generation across handlers.
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- Overrode __dir__ in Client and AsyncClient to expose dynamic endpoint routes (e.g., .messages, .domains) directly to IDE autocompletion engines (VS Code, PyCharm).
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- Native dynamic routing support for Mailgun Optimize, Validations Service, and Email Preview APIs without requiring new custom handlers.
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- Explicit support for raw MIME string (`multipart/form-data`) uploads via the `files` parameter in the `.create()` method (essential for `client.mimemessage`).
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- Advanced path interpolation in `handle_default` to automatically inject inline URL parameters (e.g., `/v2/x509/{domain}/status`).
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- Added a new "Logging & Debugging" section to `README.md`.
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- An intelligent live meta-testing suite (`test_routing_meta_live.py`) to strictly verify SDK endpoint aliases against live Mailgun servers.
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- PEP 561 Compliance: Added a `py.typed` marker to expose the SDK's strict type hints to downstream users (`mypy`, `pyright`).
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- DX Tooling: Added a unified `manage.sh` script to streamline local formatting, linting, testing, and benchmarking.
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- Routing Engine Meta-Tests: Added `test_routing_engine.py` to dynamically validate URL generation for all 58+ supported endpoints.
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### Changed
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-**Memory Optimization:** Enforced `__slots__` on `Client` and `Endpoint` classes to eliminate dynamic `__dict__` overhead, reducing Garbage Collection pauses and improving overall throughput by ~8-10%.
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- Exception Chaining (PEP 3134): Network connection errors from `httpx` and `requests` are now explicitly chained (`raise from`), preventing the swallowing of root-cause infrastructure tracebacks.
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- Refactored the `Config` routing engine to use a deterministic, data-driven approach (`EXACT_ROUTES` and `PREFIX_ROUTES`) for better maintainability.
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- Improved dynamic API version resolution for domain endpoints to gracefully switch between `v1`, `v3`, and `v4` for nested resources, with a safe fallback to `v3`.
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- Secured internal configuration registries by wrapping them in `MappingProxyType` to prevent accidental mutations of the client state.
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- Broadened type hints for `files` (`Any | None`) and `timeout` (`int | float | tuple`) to fully support `requests`/`httpx` capabilities (like multipart lists) without triggering false positives in strict IDEs.
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-**Performance**: Implemented automated Payload Minification. The SDK now strips structural spaces from JSON payloads (`separators=(',', ':')`), reducing network overhead by ~15-20% for large batch requests.
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-**Performance**: Memoized internal route resolution logic using `@lru_cache` in `_get_cached_route_data`, eliminating redundant string splitting and dictionary lookups during repeated API calls.
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- Updated `DOMAIN_ENDPOINTS` mapping to reflect Mailgun's latest architecture, officially moving `tracking`, `click`, `open`, `unsubscribe`, and `webhooks` from `v1` to `v3`.
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- Modernized the codebase using modern Python idioms (e.g., `contextlib.suppress`) and resolved strict typing errors for `pyright`.
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-**Documentation**: Migrated all internal and public docstrings from legacy Sphinx/reST format to modern Google Style for cleaner readability and better IDE hover-hints.
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- Updated Dependabot configuration to group minor and patch updates and limit open PRs.
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- CI/CD Optimization: Grouped Dependabot updates (`minor-and-patch`) to reduce Pull Request noise and optimized `.editorconfig`.
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- Migrated the fragmented linting and formatting pipeline (Flake8, Black, Pylint, Pyupgrade, etc.) to a unified, high-performance `ruff` setup in `.pre-commit-config.yaml`.
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- Refactored `api_call` exception blocks to use the `else` clause for successful returns, adhering to strict Ruff (TRY300) standards.
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- Enabled pip dependency caching in GitHub Actions to drastically speed up CI workflows.
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- Fixed API versioning collisions in `DOMAIN_ENDPOINTS` (e.g., ensuring `tracking` correctly resolves to `v3` instead of `v1`).
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- Corrected the `credentials` route prefix to properly inject the `domains/` path segment.
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- Updated `README.md` with new documentation, IDE DX features, and code examples for Validations & Optimize APIs.
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- Cleaned up obsolete unit tests that conflicted with the new forgiving dynamic Catch-All routing architecture.
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### Fixed
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- Fixed a silent data loss bug in `create()` where custom `headers` passed by the user were ignored instead of being merged into the request.
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- Fixed a kwargs collision bug in `update()` by using `.pop("headers")` instead of `.get()` to prevent passing duplicate keyword arguments to the underlying request.
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- Preserved original tracebacks (PEP 3134) by properly chaining `TimeoutError` and `ApiError` using `from e`.
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- Used safely truncating massive HTML error responses to 500 characters (preventing a log-flooding vulnerability (OWASP CWE-532)).
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- Replaced a fragile `try/except TypeError` status code check with robust `getattr` and `isinstance` validation to prevent masking unrelated exceptions.
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- Resolved `httpx``DeprecationWarning` in `AsyncEndpoint` by properly routing serialized JSON string payloads to the `content` parameter instead of `data`.
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- Fixed a bug in `domains_handler` where intermediate path segments were sometimes dropped for nested resources like `/credentials` or `/ips`.
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- Fixed flaky integration tests failing with `429 Too Many Requests` and `403 Limits Exceeded` by adding proper eventual consistency delays and state teardowns.
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- Fixed DKIM key generation tests to use the `-traditional` OpenSSL flag, ensuring valid PKCS1 format compatibility.
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- Fixed DKIM selector test names to strictly comply with RFC 6376 formatting (replaced underscores with hyphens).
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- Python Data Model Integrity: The Catch-All router (`__getattr__`) now strictly rejects Python magic methods (`__dunder__`), preventing crashes when using `hasattr()`, `pickle`, or `copy.deepcopy()`.
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- Version Drift: Corrected endpoints for `spamtraps` and `ip_whitelist` to route to their modern `v2` Mailgun backends.
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### Security
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- OWASP Credential Protection: Implemented a `SecretAuth` tuple subclass to securely redact the Mailgun API key from accidental exposure in memory dumps, tracebacks, and `repr()` logs.
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- OWASP Input Validation: Added strict sanitization in `Client._validate_auth` to strip trailing whitespace and block HTTP Header Injection attacks (rejecting `\n` and `\r` characters in API keys).
- Supply Chain Security: Patched a potential OS Command Injection vulnerability in GitHub Actions (`publish.yml`) by safely routing `github.*` contexts through environment variables.
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