What's Changed

• Avoid the stream/web warning in Node v16. by @mcollina in https://github.com/nodejs/undici/pull/1068

Full Changelog: https://github.com/nodejs/undici/compare/v4.8.0...v4.8.1

What's Changed

• Implements BalancedPool by @mcollina in https://github.com/nodejs/undici/pull/1064

Full Changelog: https://github.com/nodejs/undici/compare/v4.7.3...v4.8.0

What's Changed

• Support for Node v17 by @mcollina in https://github.com/nodejs/undici/pull/1063

Full Changelog: https://github.com/nodejs/undici/compare/v4.7.2...v4.7.3

What's Changed

• fix: don't rely on allowSyntheticDefaultImports by @RA80533 in https://github.com/nodejs/undici/pull/1059
• fix: update llhttp by @ronag in https://github.com/nodejs/undici/pull/1060

New Contributors

• @RA80533 made their first contribution in https://github.com/nodejs/undici/pull/1059

Full Changelog: https://github.com/nodejs/undici/compare/v4.7.1...v4.7.2

What's Changed

• Expose the socket in case of SocketError by @delvedor in https://github.com/nodejs/undici/pull/1041
• Add more diagnostic channels by @fatal10110 in https://github.com/nodejs/undici/pull/1036
• fix: Rename File.filename property to File.name by @octet-stream in https://github.com/nodejs/undici/pull/1044
• fix: Improve File and FormData types declarations. by @octet-stream in https://github.com/nodejs/undici/pull/1042
• docs: add basic example of fetch by @o-t-w in https://github.com/nodejs/undici/pull/1035
• Update .socket property of SocketError class by @delvedor in https://github.com/nodejs/undici/pull/1045
• perf: use bigger HWM by default by @ronag in https://github.com/nodejs/undici/pull/1038

New Contributors

• @fatal10110 made their first contribution in https://github.com/nodejs/undici/pull/1036
• @octet-stream made their first contribution in https://github.com/nodejs/undici/pull/1044
• @o-t-w made their first contribution in https://github.com/nodejs/undici/pull/1035

Full Changelog: https://github.com/nodejs/undici/compare/v4.6.0...v4.7.0

Fixes

• Simplify and fix assertion (#1033)
• Only pause on >=200 body (a48f9f009f88dbe3233507414216d068b47e711d)
• BodyMixin.arrayBuffer Buffer -> ArrayBuffer typedefs (#1025)
• FormData.set empties this[kState] if k exists (#1017) …
• Prioritize host header (#1007)
• Fetch response body may be undefined

Improvements

• Add blocking request option (#1034)
• Add experimental diagnostics channel (#1000)
• Improve code coverage of lib/fetch/headers.js (#1027)
• Avoid duplicate require (#1023)
• Add onInfo option (#977)

Fixes

• Accept undefined signal (#1004)
• Revert incorrect servername fix (#1005)
• Fetch request body null check (1973c626dc779b241e9db748a08a4f141f647ea8)

Improvements

• fetch types (#997)
• Add notes about gc spec compliance (#999)

Fixes

• Fix servername calculation (#993)
• Include final URL in redirect history (#994).

Improvements

• Lazy load llhttp (#989)

Fixes

• Follow fetch spec in regards to USVString (#986)

Improvements

• Support async iterable body in Request(eeadb5ec6e52c36df2230fcd4719215b42798fed)

Fixes

• decodedBodySize on failure (d244b90595fae421ca470434f6cb66621fe633ee)
• prefer stream.compose when available (32543652635c1d3e1d858680593a1b965f888bae)
• FormData File fixes (075d80a89297679f5e7f57c843b87d0930e556df)
• Improve test coverage

Improvements

• FormData (#961)

Improvements

• Add doc for url object (#970)

Fixes

• Redirect handler should not modify stream state (#973)
• Coverage reports (#972)
• Post with paused stream (#969)
• toWebReadable finishing too early (#962) …
• Various fetch fixes and spec compliance improvements.

Improvements

• Decompression support (#954)

Fixes

• Terminate fetch on gc (#950)
• request body.body regression (#955)
• Misc bug fixes and spec compliance improvements.

Improvements

• Experimental implementation of fetch standard (https://github.com/nodejs/undici/pull/928).

Improvements

• Implement body mixin on Readable (#907)
• Expose Connector in the public API (#906, #909)
• Improve connect option type definitions (#899)

Fixes

• Accept URL origin in Agent (#892)
• origin as optional parameter on Client and Pool types definitions (#901, #903)
• Broken link for examples on website (#897)

Improvements

• Creating util function to validate handlers (#894)

Fixes

• Always clear the connectTimeout (#896)
• Accept URL origin in Agent (#892)

Improvements

• connect option (#881, 104be9ce66167d010a6c5e87865715260bb92280, #887)
• Documentation and test for using client certificates (#890)
• Reduce code duplication (#891)
• Add onBodyChunkSent callback to dispatch (#847)
• Add documentation and types for request headerTimeout & bodyTimeout (3b669058282a29a218a3ba29709e60efb04bb347, #888)

Fixes

• Validate opts (ad2a490babc2687eaa49805d38ba2149a6d72360)
• Forward connectionError(5172fd98fbaa449cd2b85ccca8024d34458779a3)

Improvements

• Add support for request iterator body (#848)
• Same origin redirect (#781)

Fixes

• Add missing string[] option for passed headers (#836)
• Fix errors in documentation (#846)

This release contains multiple breaking changes. These should not affect the majority of users but it is recommended to consider the full change list.

Improvements

• Improved global API ergonomics (#740)
• Removed --insecure-http-parser support (3d1027f5272f1ffd62a0a990b504636b1a3e158d)
• Pass headers as Buffer (#696)
• Simplify api (#695)
• Accept callbacks in Agent close and destroy (d1a406f982bda23a982c89a58ccc8ae049ed034e)
• Added closed and destroyed properties on Agent (#634)
• Allow overriding timeouts per requests (#679)
• Update deps (#675, 8158defc0ad159470bf52eacf5ff9e12005e11e5)
• Add undici mocking support (#587)
• Unify Client, Pool & Agent under Dispatcher (#544, #606, #620)
• Add connectTimeout (#619)
• Follow redirects (#603) (#769)
• Client lifecycle diagram (#567)
• Docs improvements and site (undici.nodejs.org) (#550, #565, #567, #582, #585, #596, 5095a2b3be8c7e338418905eec423fcc8a631ef9, #627)
• Reuse tls sessions across clients of a connection pool (#588)
• Add strictContentLength option to treat request content length mismatch as warning (#586)
• Connecting through a proxy (#568)
• Agent connect/disconnect events (#558)
• Use llhttp WASM build for http parsing (#564, #611, #642, #648, #680)
• Only append non empty search to path (e8ece2a7e8c5be2a8eef81d01f38a82a0a329dbb)
• Add factory arg to Pool and Agent (761738a045712840f24c2c2f2b3670797823ecf5)
• Use husky (#605)
• Add pr and issue templates (#608)
• Allow process to exit when no requests are pending (#772)
• Add data to parser errors (7a750ba998cbc4c125f747876536655c2f7b7c02)
• Try to re-use timer when possible (#729)
• Make request errors explicit (#777)
• Add fuzzing support (#821)
• connect (#763)
• unref socket while idle (#772)

Fixes

• Don't emit 'disconnect' without preceding 'connect'(#771)
• Don't fail when response ends before request body (#709)
• Don't headersTimeout while writing request body (#646)
• Emit 'disconnect' after destroy() (#665)
• Refresh timeout timer on parser resume (#653)
• Agent deep copy options (#636)
• Kill socket on request abort (#689)
• Add more strict check for streams in util.isStream() (#628)
• Remove Node 10 support (#623)
• Remove the esm wrapper, rely on commonjs auto detection (#599)
• Always detach socket on upgrade (252b676756053bc8bcf70cff89cad33243a9c9e5)
• Invoke onUpgrade after detach (641e0185efe1090e412f6b9b7ec243ad18c52880)
• Missing client arg (#555)
• Reduce queueMicrotask scope (#572)
• Wait for queued handlers to run before onError (#548)
• Add BodyTimeoutError to error types (#546)
• Omit path in undici.request opts (ts) (#559)
• Don't queue if destroyed (3d002c135fcdbcccdf25120ef1fa8ab43e8228d5)
• Agent.dispatch catch error (8c0051f8d25badb252c4a13b7810fc9556f908e9)
• destroy IncomingMessage (#834)
• Handle invalid response body length (#816)
• Guard against user throw in onError (#818)
• Only emit 'disconnect' if 'connect' (#771)