httpx 0.14.0

Version 0.14.0

on Python PyPI

0.14.0 (August 7th, 2020)

The 0.14 release includes a range of improvements to the public API, intended on preparing for our upcoming 1.0 release.

• Our HTTP/2 support is now fully optional. You now need to use pip install httpx[http2] if you want to include the HTTP/2 dependancies.
• Our HSTS support has now been removed. Rewriting URLs from http to https if the host is on the HSTS list can be beneficial in avoiding roundtrips to incorrectly formed URLs, but on balance we've decided to remove this feature, on the principle of least surprise. Most programmatic clients do not include HSTS support, and for now we're opting to remove our support for it.
• Our exception hierarchy has been overhauled. Most users will want to stick with their existing httpx.HTTPError usage, but we've got a clearer overall structure now. See https://www.python-httpx.org/exceptions/ for more details.

When upgrading you should be aware of the following public API changes. Note that deprecated usages will currently continue to function, but will issue warnings.

• You should now use httpx.codes consistently in favour of httpx.StatusCodes.
• Usage of httpx.Timeout() should now always include an explicit default. Eg. httpx.Timeout(None, pool=5.0).
• When using httpx.Timeout(), we now have more concisely named keyword arguments. Eg. read=5.0, instead of read_timeout=5.0.
• Use httpx.Limits() instead of httpx.PoolLimits(), and limits=... instead of pool_limits=....
• The httpx.Limits(max_keepalive=...) argument is now deprecated in favour of a more explicit httpx.Limits(max_keepalive_connections=...)
• Keys used with Client(proxies={...}) should now be in the style of {"http://": ...}, rather than {"http": ...}.
• The multidict methods Headers.getlist() and QueryParams.getlist() are deprecated in favour of more consistent .get_list() variants.
• The URL.is_ssl property is deprecated in favour of URL.scheme == "https".
• The URL.join(relative_url=...) method is now URL.join(url=...). This change does not support warnings for the deprecated usage style.

One notable aspect of the 0.14.0 release is that it tightens up the public API for httpx, by ensuring that several internal attributes and methods have now become strictly private.

The following previously had nominally public names on the client, but were all undocumented and intended solely for internal usage. They are all now replaced with underscored names, and should not be relied on or accessed.

These changes should not affect users who have been working from the httpx documentation.

• .merge_url(), .merge_headers(), .merge_cookies(), .merge_queryparams()
• .build_auth(), .build_redirect_request()
• .redirect_method(), .redirect_url(), .redirect_headers(), .redirect_stream()
• .send_handling_redirects(), .send_handling_auth(), .send_single_request()
• .init_transport(), .init_proxy_transport()
• .proxies, .transport, .netrc, .get_proxy_map()

See pull requests #997, #1065, #1071.

Some areas of API which were already on the deprecation path, and were raising warnings or errors in 0.13.x have now been escalated to being fully removed.

• Drop ASGIDispatch, WSGIDispatch, which have been replaced by ASGITransport, WSGITransport.
• Drop dispatch=...`` on client, which has been replaced by transport=...``
• Drop soft_limit, hard_limit, which have been replaced by max_keepalive and max_connections.
• Drop Response.stream and Response.raw, which have been replaced by ``.aiter_bytes and .aiter_raw.
• Drop proxies=<transport instance> in favor of proxies=httpx.Proxy(...).

See pull requests #1057, #1058.

### Added

• Added dedicated exception class httpx.HTTPStatusError for .raise_for_status() exceptions. (Pull #1072)
• Added httpx.create_ssl_context() helper function. (Pull #996)
• Support for proxy exlcusions like proxies={"https://www.example.com": None}. (Pull #1099)
• Support QueryParams(None) and client.params = None. (Pull #1060)

Changed

• Use httpx.codes consistently in favour of httpx.StatusCodes which is placed into deprecation. (Pull #1088)
• Usage of httpx.Timeout() should now always include an explicit default. Eg. httpx.Timeout(None, pool=5.0). (Pull #1085)
• Switch to more concise httpx.Timeout() keyword arguments. Eg. read=5.0, instead of read_timeout=5.0. (Pull #1111)
• Use httpx.Limits() instead of httpx.PoolLimits(), and limits=... instead of pool_limits=.... (Pull #1113)
• The httpx.Limits(max_keepalive=...) argument is now deprecated in favour of a more explicit httpx.Limits(max_keepalive_connections=...).
• Keys used with Client(proxies={...}) should now be in the style of {"http://": ...}, rather than {"http": ...}. (Pull #1127)
• The multidict methods Headers.getlist and QueryParams.getlist are deprecated in favour of more consistent .get_list() variants. (Pull #1089)
• URL.port becomes Optional[int]. Now only returns a port if one is explicitly included in the URL string. (Pull #1080)
• The URL(..., allow_relative=[bool]) parameter no longer exists. All URL instances may be relative. (Pull #1073)
• Drop unnecessary url.full_path = ... property setter. (Pull #1069)
• The URL.join(relative_url=...) method is now URL.join(url=...). (Pull #1129)
• The URL.is_ssl property is deprecated in favour of URL.scheme == "https". (Pull #1128)

Fixed

• Add missing Response.next() method. (Pull #1055)
• Ensure all exception classes are exposed as public API. (Pull #1045)
• Support multiple items with an identical field name in multipart encodings. (Pull #777)
• Skip HSTS preloading on single-label domains. (Pull #1074)
• Fixes for Response.iter_lines(). (Pull #1033, #1075)
• Ignore permission errors when accessing .netrc files. (Pull #1104)
• Allow bare hostnames in HTTP_PROXY etc... environment variables. (Pull #1120)
• Settings app=... or transport=... bypasses any environment based proxy defaults. (Pull #1122)
• Fix handling of .base_url when a path component is included in the base URL. (Pull #1130)