Sourced from org.apache.httpcomponents.client5:httpclient5's changelog.

Release 5.6 ALPHA1

This is the first ALPHA release in the 5.6 release series. It adds several features such as transport content decompression and content compression for the async transport, support for Unix sockets, experimental support for SCRAM-SHA-256 authentication scheme, and Micrometer/OTel observations & metrics.

Commons Compress, Brotli codec, and ZStd codec are optional dependencies and get wired into the execution pipeline only if present on the classpath.

Notable changes and features included in the 5.6 series:

• Unix domain socket support.

• Support for pluggable content codecs via Commons-Compress in the classic transport. (optional).

• Support for transparent content decompression and content compression with deflate, gzip, zstd (optional), and brotli (optional) codecs in the async transport.

• Micrometer/OTel observations & metrics (optinal).

• Off-lock connection disposal by the classic pooling connection manager. Experimental.

• SCRAM-SHA-256 authentication scheme (RFC 7804). Experimental.

• Request Priority support (RFC 9218). Experimental.

Compatibility notes:

• As of this version, HttpClient uses BUILTIN HostnameVerificationPolicy by default, delegating host verification to JSSE security manager. One must explicitly configure the TLS strategy to continue using the hostname verifier shipped with HttpClient.

• Five-second TCP keep-alive is now enabled by default.

Change Log

• RequestConfig: Un-deprecate #setProxy. Contributed by Ryan Schmitt

• Stale connection check support in PoolingAsyncClientConnectionManager. Contributed by Ryan Schmitt

• ConnectionConfig: #idleTimeout support. Contributed by Ryan Schmitt

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• decd193 HttpClient 5.6 release
• 11ea8e5 Updated release notes for HttpClient 5.6 release
• 77fa61a Limit the length of content codec list that can be processed automatically
• 81b7971 Upgraded HttpCore to version 5.4
• 2c7fe0f Add OFFLOCK pool concurrency policy backed by RouteSegmentedConnPool (#765)
• 1f4dea7 Fixed Micrometer and OpenTelemetry dependency declaration
• d2fadd2 Tag TLS handshake timeout tests with slow
• e52e466 TestTlsHandshakeTimeout: Disable assertions on Java 8
• 77f52f0 Upgraded HttpClient version to 5.6-alpha2-SNAPSHOT
• 48e0f25 HttpClient 5.6-alpha1 release
• Additional commits viewable in compare view