What's Changed

• fix: add timeout to proxy connection reading and writing by @Sniper91 in https://github.com/valyala/fasthttp/pull/1791
• Validate header values by @erikdubbelboer in https://github.com/valyala/fasthttp/pull/1796
• chore(deps): bump golang.org/x/sys from 0.21.0 to 0.22.0 by @dependabot in https://github.com/valyala/fasthttp/pull/1800
• chore(deps): bump golang.org/x/crypto from 0.24.0 to 0.25.0 by @dependabot in https://github.com/valyala/fasthttp/pull/1802
• chore(deps): bump golang.org/x/net from 0.26.0 to 0.27.0 by @dependabot in https://github.com/valyala/fasthttp/pull/1801
• Optimize struct field order to reduce memory usage by @ksw2000 in https://github.com/valyala/fasthttp/pull/1809
• Fix possible race condition on request ctx done #1662 by @byte0o in https://github.com/valyala/fasthttp/pull/1806
• Fix header parser (#1808) by @ksw2000 in https://github.com/valyala/fasthttp/pull/1810
• Replace custom AppendUint with strconv.AppendUint by @gaby in https://github.com/valyala/fasthttp/pull/1813
• Use Named Fields and Align Structures to Reduce Memory Usage by @gaby in https://github.com/valyala/fasthttp/pull/1814
• chore(deps): bump golang.org/x/crypto from 0.25.0 to 0.26.0 by @dependabot in https://github.com/valyala/fasthttp/pull/1820
• chore(deps): bump golang.org/x/net from 0.27.0 to 0.28.0 by @dependabot in https://github.com/valyala/fasthttp/pull/1821
• chore(deps): bump golang.org/x/sys from 0.23.0 to 0.24.0 by @dependabot in https://github.com/valyala/fasthttp/pull/1823
• StreamRequestBody shouldn't read more data than actual need. by @newacorn in https://github.com/valyala/fasthttp/pull/1819
• Reduce the size of ResponseHeader and RequestHeader by @ksw2000 in https://github.com/valyala/fasthttp/pull/1826
• A response without a body can't have trailers by @erikdubbelboer in https://github.com/valyala/fasthttp/pull/1825
• TestHostClientMaxConnWaitTimeoutError test case sometimes fails by @newacorn in https://github.com/valyala/fasthttp/pull/1832
• Fix the MaxConns semaphore issue in HostClient. by @newacorn in https://github.com/valyala/fasthttp/pull/1831
• Add a dedicated cache container for the zstd compression algorithm by @newacorn in https://github.com/valyala/fasthttp/pull/1828
• We cannot avoid continuing to call SetReadDeadline and similar methods after the connection is closed. by @newacorn in https://github.com/valyala/fasthttp/pull/1835
• Remove support for go 1.19 and 1.20, and add support for 1.23 by @erikdubbelboer in https://github.com/valyala/fasthttp/pull/1837
• Merge the various proxy dialer implementations from the fasthttpproxy into a single struct. by @newacorn in https://github.com/valyala/fasthttp/pull/1829
• Make RetryIfFunc handle request errors by @ksw2000 in https://github.com/valyala/fasthttp/pull/1818
• Using atomic instead of mutex and delete scratch slice by @NikoMalik in https://github.com/valyala/fasthttp/pull/1833
• Fix Different request paths share the same fs cache is some cases. by @newacorn in https://github.com/valyala/fasthttp/pull/1843
• Make the tests complete earlier. by @newacorn in https://github.com/valyala/fasthttp/pull/1848
• Fix potential data race reports when the -race flag is enabled. by @newacorn in https://github.com/valyala/fasthttp/pull/1847
• Fix issues with tests interfering with each other in certain situations. by @newacorn in https://github.com/valyala/fasthttp/pull/1842
• When StreamRequestBody is set to true, we cannot safely release br by @newacorn in https://github.com/valyala/fasthttp/pull/1844
• Revert Pull 1233 fix: The client write operation did not immediately return upon encountering an RST packet. by @newacorn in https://github.com/valyala/fasthttp/pull/1849
• RetryIf might need more information and greater control over the execution flow. by @newacorn in https://github.com/valyala/fasthttp/pull/1850
• Sorry about forgetting to remove a redundant field and clarify the comments. by @newacorn in https://github.com/valyala/fasthttp/pull/1851
• chore(deps): bump golang.org/x/crypto from 0.26.0 to 0.27.0 by @dependabot in https://github.com/valyala/fasthttp/pull/1858
• chore(deps): bump golang.org/x/net from 0.28.0 to 0.29.0 by @dependabot in https://github.com/valyala/fasthttp/pull/1857
• chore(deps): bump securego/gosec from 2.20.0 to 2.21.1 by @dependabot in https://github.com/valyala/fasthttp/pull/1855
• chore(deps): bump securego/gosec from 2.21.1 to 2.21.2 by @dependabot in https://github.com/valyala/fasthttp/pull/1861
• Revert "Using atomic instead of mutex and delete scratch slice" by @newacorn in https://github.com/valyala/fasthttp/pull/1846
• Fix improper memory reuse in NewFastHTTPHandler by @sigmundxia in https://github.com/valyala/fasthttp/pull/1860
• Improve the performance of ConnState.String() by @ksw2000 in https://github.com/valyala/fasthttp/pull/1871
• chore(deps): bump securego/gosec from 2.21.2 to 2.21.3 by @dependabot in https://github.com/valyala/fasthttp/pull/1870
• Reduce the size of the Cookie by 32 bytes. by @ksw2000 in https://github.com/valyala/fasthttp/pull/1866
• fix: type assertion to perIPTLSConn instead of erroneous perIPConn by @KSpaceer in https://github.com/valyala/fasthttp/pull/1863
• Improve performance of ParseUfloat by @ksw2000 in https://github.com/valyala/fasthttp/pull/1865

New Contributors

• @Sniper91 made their first contribution in https://github.com/valyala/fasthttp/pull/1791
• @ksw2000 made their first contribution in https://github.com/valyala/fasthttp/pull/1809
• @newacorn made their first contribution in https://github.com/valyala/fasthttp/pull/1819
• @NikoMalik made their first contribution in https://github.com/valyala/fasthttp/pull/1833
• @sigmundxia made their first contribution in https://github.com/valyala/fasthttp/pull/1860
• @KSpaceer made their first contribution in https://github.com/valyala/fasthttp/pull/1863

Full Changelog: https://github.com/valyala/fasthttp/compare/v1.55.0...v1.56.0