Metadata-Version: 2.4
Name: httpx-qs
Version: 0.2.2
Summary: HTTPX transport leveraging qs-codec for advanced query string encoding and decoding.
Project-URL: Homepage, https://techouse.github.io/httpx_qs/
Project-URL: Documentation, https://techouse.github.io/httpx_qs/
Project-URL: Repository, https://github.com/techouse/httpx_qs.git
Project-URL: Issues, https://github.com/techouse/httpx_qs/issues
Project-URL: Changelog, https://github.com/techouse/httpx_qs/blob/master/CHANGELOG.md
Project-URL: Sponsor, https://github.com/sponsors/techouse
Project-URL: PayPal, https://paypal.me/ktusar
Author-email: Klemen Tusar <techouse@gmail.com>
License-Expression: BSD-3-Clause
License-File: LICENSE
Keywords: arrays,brackets,codec,form-urlencoded,httpx,nested,percent-encoding,qs,query,query-string,querystring,rfc3986,url,urldecode,urlencode
Classifier: Development Status :: 4 - Beta
Classifier: Environment :: Web Environment
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: BSD License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: 3.13
Classifier: Programming Language :: Python :: 3.14
Classifier: Programming Language :: Python :: Free Threading
Classifier: Programming Language :: Python :: Free Threading :: 2 - Beta
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: Internet :: WWW/HTTP
Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content :: CGI Tools/Libraries
Classifier: Topic :: Software Development :: Libraries
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: Text Processing :: General
Classifier: Topic :: Utilities
Classifier: Typing :: Typed
Requires-Python: >=3.8
Requires-Dist: httpx<1.0.0,>=0.28.1
Requires-Dist: qs-codec<2.0.0,>=1.5.0
Provides-Extra: dev
Requires-Dist: black; extra == 'dev'
Requires-Dist: isort; extra == 'dev'
Requires-Dist: mypy<1.19; (platform_python_implementation == 'PyPy') and extra == 'dev'
Requires-Dist: mypy>=1.10.0; (platform_python_implementation != 'PyPy') and extra == 'dev'
Requires-Dist: pytest-cov>=5.0.0; extra == 'dev'
Requires-Dist: pytest>=8.1.2; extra == 'dev'
Requires-Dist: toml>=0.10.2; extra == 'dev'
Requires-Dist: tox; extra == 'dev'
Description-Content-Type: text/x-rst

httpx-qs
========

Smart, policy-driven query string merging & encoding for `httpx <https://www.python-httpx.org>`_ powered by
`qs-codec <https://techouse.github.io/qs_codec/>`_.

.. image:: https://img.shields.io/pypi/v/httpx-qs?logo=pypi
   :target: https://pypi.org/project/httpx-qs/
   :alt: PyPI version

.. image:: https://img.shields.io/pypi/status/httpx-qs?logo=pypi
   :target: https://pypi.org/project/httpx-qs/
   :alt: PyPI - Status

.. image:: https://img.shields.io/pypi/dm/httpx-qs?logo=pypi&label=PyPI%20downloads
   :target: https://pypistats.org/packages/httpx-qs
   :alt: PyPI - Downloads

.. image:: https://img.shields.io/pypi/pyversions/httpx-qs?logo=python&label=Python
   :target: https://pypi.org/project/httpx-qs/
   :alt: Supported Python versions

.. image:: https://img.shields.io/badge/PyPy-3.8%20%7C%203.9%20%7C%203.10%20%7C%203.11-6f42c1?logo=pypy
   :target: https://www.pypy.org/
   :alt: PyPy support status

.. image:: https://img.shields.io/pypi/format/httpx-qs?logo=python
   :target: https://pypi.org/project/httpx-qs/
   :alt: PyPI - Format

.. image:: https://github.com/techouse/httpx_qs/actions/workflows/test.yml/badge.svg
   :target: https://github.com/techouse/httpx_qs/actions/workflows/test.yml
   :alt: Tests

.. image:: https://github.com/techouse/httpx_qs/actions/workflows/github-code-scanning/codeql/badge.svg
   :target: https://github.com/techouse/httpx_qs/actions/workflows/github-code-scanning/codeql
   :alt: CodeQL

.. image:: https://img.shields.io/github/license/techouse/httpx_qs
   :target: https://github.com/techouse/httpx_qs/blob/master/LICENSE
   :alt: License

.. image:: https://codecov.io/gh/techouse/httpx_qs/graph/badge.svg?token=JMt8akIZFh
   :target: https://codecov.io/gh/techouse/httpx_qs
   :alt: Codecov

.. image:: https://app.codacy.com/project/badge/Grade/420bf66ab90d4b3798573b6ff86d02af
   :target: https://app.codacy.com/gh/techouse/httpx_qs/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade
   :alt: Codacy Quality

.. image:: https://img.shields.io/github/sponsors/techouse?logo=github
   :target: https://github.com/sponsors/techouse
   :alt: GitHub Sponsors

.. image:: https://img.shields.io/github/stars/techouse/httpx_qs
   :target: https://github.com/techouse/httpx_qs/stargazers
   :alt: GitHub Repo stars

.. image:: https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg?logo=contributorcovenant
   :target: CODE-OF-CONDUCT.md
   :alt: Contributor Covenant

.. |flake8| image:: https://img.shields.io/badge/flake8-checked-blueviolet.svg?logo=python
   :target: https://flake8.pycqa.org/en/latest/

.. image:: https://img.shields.io/badge/mypy-checked-blue.svg?logo=python
   :target: https://mypy.readthedocs.io/en/stable/
   :alt: mypy

.. image:: https://img.shields.io/badge/linting-pylint-yellowgreen.svg?logo=python
   :target: https://github.com/pylint-dev/pylint
   :alt: pylint

.. image:: https://img.shields.io/badge/imports-isort-blue.svg?logo=python
   :target: https://pycqa.github.io/isort/
   :alt: isort

.. image:: https://img.shields.io/badge/security-bandit-blue.svg?logo=python
   :target: https://github.com/PyCQA/bandit
   :alt: Security Status

Overview
--------

``httpx-qs`` provides:

* A transport wrapper ``SmartQueryStrings`` that merges *existing* URL query parameters with *additional* ones supplied via ``request.extensions``.
* A flexible ``merge_query`` utility with selectable conflict resolution policies.
* Consistent, standards-aware encoding via ``qs-codec`` (RFC3986 percent-encoding, structured arrays, nested objects, etc.).

Why?
----

HTTPX already lets you pass ``params=`` when making requests, but sometimes you need to:

* Inject **additional** query parameters from middleware/transport layers (e.g., auth tags, tracing IDs, feature flags) *without losing* the caller's original intent.
* Combine repeated keys or treat them deterministically (replace / keep / error) rather than always flattening.
* Support nested data or list semantics consistent across clients and services.

``qs-codec`` supplies the primitives (decoding & encoding with configurable ``ListFormat``). ``httpx-qs`` stitches that into HTTPX's transport pipeline so you can declaratively extend queries at request dispatch time.

Requirements
------------

* CPython 3.8-3.14, including free-threaded 3.14t, or PyPy 3.8-3.11
* ``httpx>=0.28.1,<1.0.0``
* ``qs-codec>=1.5.0``

Installation
------------

.. code-block:: bash

	pip install httpx-qs

Minimal Example
---------------

.. code-block:: python

	import httpx
	from httpx_qs.transporters.smart_query_strings import SmartQueryStrings

	client = httpx.Client(transport=SmartQueryStrings(httpx.HTTPTransport()))

	response = client.get(
		"https://www.google.com",
		params={"a": "b", "c": "d"},
		extensions={"extra_query_params": {"c": "D", "tags": ["x", "y"]}},
	)

	print(str(response.request.url))
	# Example (order may vary): https://www.google.com/?a=b&c=d&c=D&tags=x&tags=y

Using Merge Policies
--------------------

Conflict resolution when a key already exists is controlled by ``MergePolicy``.

Available policies:

* ``combine`` (default): concatenate values → existing first, new afterward (``a=1&a=2``)
* ``replace``: last-wins, existing value is overwritten (``a=2``)
* ``keep``: first-wins, ignore the new value (``a=1``)
* ``error``: raise ``ValueError`` on duplicate key

Specify per request:

.. code-block:: python

	from httpx_qs import MergePolicy

	r = client.get(
		"https://api.example.com/resources",
		params={"dup": "original"},
		extensions={
			"extra_query_params": {"dup": "override"},
			"extra_query_params_policy": MergePolicy.REPLACE,
		},
	)
	# Query contains only dup=override

Async Usage
-----------

``SmartQueryStrings`` works equally for ``AsyncClient``:

.. code-block:: python

	import httpx
	from httpx_qs.transporters.smart_query_strings import SmartQueryStrings

	async def main() -> None:
		async with httpx.AsyncClient(transport=SmartQueryStrings(httpx.AsyncHTTPTransport())) as client:
			r = await client.get(
				"https://example.com/items",
				params={"filters": "active"},
				extensions={"extra_query_params": {"page": 2}},
			)
			print(r.request.url)

	# Run with: asyncio.run(main())

``merge_query`` Utility
-----------------------

You can use the underlying function directly:

.. code-block:: python

	from httpx_qs import merge_query, MergePolicy
	from qs_codec import EncodeOptions, ListFormat

	new_url = merge_query(
		"https://example.com?a=1",
		{"a": 2, "tags": ["x", "y"]},
		options=EncodeOptions(list_format=ListFormat.REPEAT),
		policy=MergePolicy.COMBINE,
	)
	# → https://example.com/?a=1&a=2&tags=x&tags=y

Why ``ListFormat.REPEAT`` by Default?
-------------------------------------

``qs-codec`` exposes several list formatting strategies (e.g. repeat, brackets, indices). ``httpx-qs`` defaults to
``ListFormat.REPEAT`` because:

* It matches common server expectations (``key=value&key=value``) without requiring bracket parsing logic.
* It preserves original ordering while remaining unambiguous and simple for log inspection.
* Many API gateways / proxies / caches reliably forward repeated keys whereas bracket syntaxes can be normalized away.

If your API prefers another convention (e.g. ``tags[]=x&tags[]=y`` or ``tags[0]=x``) just pass a custom ``EncodeOptions`` via
``extensions['extra_query_params_options']`` or parameter ``options`` when calling ``merge_query`` directly.

Advanced Per-Request Customization
----------------------------------

.. code-block:: python

	from qs_codec import EncodeOptions, ListFormat

	r = client.get(
		"https://service.local/search",
		params={"q": "test"},
		extensions={
			"extra_query_params": {"debug": True, "tags": ["alpha", "beta"]},
			"extra_query_params_policy": "combine",  # also accepts string values
			"extra_query_params_options": EncodeOptions(list_format=ListFormat.BRACKETS),
		},
	)
	# Example: ?q=test&debug=true&tags[]=alpha&tags[]=beta

Error Policy Example
--------------------

.. code-block:: python

	try:
		client.get(
			"https://example.com",
			params={"token": "abc"},
			extensions={
				"extra_query_params": {"token": "xyz"},
				"extra_query_params_policy": "error",
			},
		)
	except ValueError as exc:
		print("Duplicate detected:", exc)

Testing Strategy
----------------

The project includes unit tests covering policy behaviors, error handling, and transport-level integration. Run them with:

.. code-block:: bash

	pytest

Further Reading
---------------

* HTTPX documentation: https://www.python-httpx.org
* qs-codec documentation: https://techouse.github.io/qs_codec/

License
-------

BSD-3-Clause. See ``LICENSE`` for details.

Contributing
------------

Issues & PRs welcome. Please add tests for new behavior and keep doc examples in sync.
