The Apache HttpComponents project is pleased to announce 5.4 release of
HttpComponents HttpClient.

This is the first GA release in the 5.4 release series. This release
finalizes the 5.4 APIs, upgrades HttpCore to version 5.3 and improves
the Public Suffix matching algorithm implementation.

IMPORTANT! The new cache entry serialization format is incompatible
with earlier versions of HttpClient Cache. Persistent caches (file
system based, Memcached, EhCache with object serialization) created
with any earlier version MUST be flushed and re-populated or the cache
backend MUST be configured to use the old, deprecated cache entry
serializer.


Notable changes and features included in the 5.4 series:

* Improved conformance to RFC 9110 (HTTP Semantics), RFC 7616 (HTTP
Digest Access Authentication), RFC 2617 (’Basic’ HTTP Authentication
Scheme).

* UTF-8 encoding is used by default for text where appropriate.

* Compatibility with Java Virtual Threads and Java 21 Runtime.

* Redesign and rewrite of the HTTP caching protocol layer for better
efficiency and improved conformance to RFC 9111 (HTTP Caching).

* Cache control and context APIs.

* ETag APIs.

* TLS SNI and endpoint identification improvements.

* Support for RFC 2817 (Upgrading to TLS Within HTTP/1.1).

* Auth cache no longer makes use of Java serialization.

* Deprecation of ConnectionSocketFactory and
LayeredConnectionSocketFactory.

* HttpContext optimization and performance improvement.

* Async cache is no longer considered experimental.


Download - <http://hc.apache.org/downloads.cgi>
Release notes -
<https://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-5.4.x.txt
HttpComponents site - <http://hc.apache.org/>
  

About HttpComponents HttpClient

The Hyper-Text Transfer Protocol (HTTP) is perhaps the most significant
protocol used on the Internet today. Web services, network-enabled
appliances and the growth of network computing continue to expand the
role of the HTTP protocol beyond user-driven web browsers, while
increasing the number of applications that require HTTP support.

Designed for extension while providing robust support for the base HTTP
protocol, HttpClient may be of interest to anyone building HTTP-aware
client applications such as web browsers, web service clients, or
systems that leverage or extend the HTTP protocol for distributed
communication.



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