CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

[1.2.0] - 2025-10-27

SECURITY

• python: added Decompressor::can_accept_more_data method and optional output_buffer_limit argument Decompressor::process; that allows mitigation of unexpectedly large output; reported by Charles Chan (https://github.com/charleswhchan)

Added

• decoder / encoder: added static initialization to reduce binary size
• python: allow limiting decoder output (see SECURITY section)
• CLI: brcat alias; allow decoding concatenated brotli streams
• kt: pure Kotlin decoder
• cgo: support "raw" dictionaries
• build: Bazel modules

Removed

• java: dropped finalize() for native entities

Fixed

• java: in compress pass correct length to native encoder

Improved

• build: install man pages
• build: updated / fixed / refined Bazel buildfiles
• encoder: faster encoding
• cgo: link via pkg-config
• python: modernize extension / allow multi-phase module initialization

Changed

• decoder / encoder: static tables use "small" model (allows 2GiB+ binaries)

[1.1.0] - 2023-08-28

Added

• decoder: BrotliDecoderAttachDictionary
• decoder: BrotliDecoderOnFinish callback behind BROTLI_REPORTING
• decoder: BrotliDecoderSetMetadataCallbacks
• encoder: BrotliEncoderPrepareDictionary, BrotliEncoderDestroyPreparedDictionary, BrotliEncoderAttachPreparedDictionary
• decoder: BrotliEncoderOnFinish callback behind BROTLI_REPORTING
• common: BrotliSharedDictionaryCreateInstance, BrotliSharedDictionaryDestroyInstance, BrotliSharedDictionaryAttach
• CLI: --dictionary option
• java: encoder wrapper: Parameters.mode
• java: Brotli{Input|Output}Stream.attachDictionary
• java: wrapper: partial byte array input
• typescript: decoder (transpiled from Java)

Removed

• build: BROTLI_BUILD_PORTABLE option

Fixed

• java: JNI decoder failed sometimes on power of 2 payloads

Improved

• java / js: smaller decoder footprint
• decoder: faster decoding
• encoder: faster encoding
• encoder: smaller stack frames

[1.0.9] - 2020-08-27

Re-release of 1.0.8.

[1.0.8] - 2020-08-27

SECURITY

• CVE-2020-8927: potential overflow when input chunk is >2GiB

Added

• encoder: BROTLI_PARAM_STREAM_OFFSET

Improved

• CLI: better reporting
• CLI: workaround for "lying feof"
• java: faster decoding
• java: support "large window"
• encoder: use less memory
• release: filter sources for the tarball

[1.0.7] - 2018-10-23

Improved

• decoder: faster decoding on ARM CPU

[1.0.6] - 2018-09-13

Fixed

• build: AutoMake and CMake build
• java: JDK 8<->9 incompatibility

[1.0.5] - 2018-06-27

Added

• scripts: extraction of static dictionary from RFC

Improved

• encoder: better compression at quality 1
• encoder: better compression with "large window"

[1.0.4] - 2018-03-29

Added

• encoder: BROTLI_PARAM_NPOSTFIX, BROTLI_PARAM_NDIRECT
• CLI: --large_window option

Improved

• encoder: better compression

[1.0.3] - 2018-03-02

Added

• decoder: BROTLI_DECODER_PARAM_LARGE_WINDOW enum
• encoder: BROTLI_PARAM_LARGE_WINDOW enum
• java: BrotliInputStream.setEager

Fixed

• build: AutoMake build in some environments
• encoder: fix one-shot q=10 1-byte input compression

Improved

• encoder: better font compression

[1.0.2] - 2017-11-28

Added

• build: AutoMake
• research: better dictionary generators

[1.0.1] - 2017-09-22

Changed

• clarifications in README.md

[1.0.0] - 2017-09-20

Added

• decoder: BrotliDecoderSetParameter
• csharp: decoder (transpiled from Java)
• java: JNI wrappers
• javascript: decoder (transpiled from Java)
• python: streaming decompression
• research: dictionary generator

Changed

• CLI: rename bro to brotli

Removed

• decoder: BrotliDecoderSetCustomDictionary
• encoder: BrotliEncoderSetCustomDictionary

Improved

• java: faster decoding
• encoder: faster compression

[0.6.0] - 2017-04-10

Added

• CLI: `--no-copy-stat option
• java: pure java decoder
• build: fuzzers
• research: brotlidump tool to explore brotli streams
• go: wrapper

Removed

• decoder: API with plain Brotli prefix

Deprecated

• encoder: BrotliEncoderInputBlockSize, BrotliEncoderCopyInputToRingBuffer, BrotliEncoderWriteData

Improved

• encoder: faster compression
• encoder: denser compression
• decoder: faster decompression
• python: release GIL
• python: use zero-copy API

[0.5.2] - 2016-08-11

Added

• common: BROTLI_BOOL, BROTLI_TRUE, BROTLI_FALSE
• decoder: API with BrotliDecoder prefix instead of plain Brotli
• build: Bazel, CMake

Deprecated

• decoder: API with plain Brotli prefix

Changed

• boolean argument / result types are re-branded as BROTLI_BOOL

Improved

• build: reduced amount of warnings in various build environments
• encoder: faster compression
• encoder: lower memory usage

[0.5.0] - 2016-06-15

Added

• common: library has been assembled from shared parts of decoder and encoder
• encoder: C API

Removed

• encoder: C++ API

[0.4.0] - 2016-06-14

Added

• encoder: faster compression modes (quality 0 and 1)
• decoder: BrotliGetErrorCode, BrotliErrorString and BROTLI_ERROR_CODES_LIST

Removed

• decoder: deprecated streaming API (using BrotliInput)

Fixed

• decoder: possible pointer underflow

Improved

• encoder: faster compression

[0.3.0] - 2015-12-22

LICENSE

License have been upgraded to more permissive MIT.

Added

• CLI: --window option
• tools/version.h file
• decoder: low level streaming API
• decoder: custom memory manager API

Deprecated

• decoder: streaming API using BrotliInput struct

Fixed

• decoder: processing of uncompressed blocks
• encoder: possible division by zero

Improved

• encoder: faster decompression
• build: more portable builds for various CPU architectures

[0.2.0] - 2015-09-01

Added

• CLI: --verbose and --repeat options

Fixed

• decoder: processing of uncompressed blocks
• encoder: block stitching on quality 10 / 11

Improved

• build: CI/CD integration
• build: better test coverage
• encoder: better compression of UTF-8 content
• encoder: faster decompression

[0.1.0] - 2015-08-11

Initial release.