v2.6.1

Compare Source

Bug fixes

• Resolve typeerror on import for python < 3.9.2 (#​151) (2042c82)

v2.6.0

Compare Source

Features

• Publish documentation (#​149) (4235273)

v2.5.0

Compare Source

Features

• Add callback for users to customize socket creation (#​147) (8e1bc6a)

v2.4.8

Compare Source

Bug fixes

• Close runner up sockets in the event there are multiple winners (#​143) (476a05b)

v2.4.7

Compare Source

Bug fixes

• Resolve warnings when running tests (#​144) (e96264a)

v3.11.18

Compare Source

====================

Bug fixes

• Disabled TLS in TLS warning (when using HTTPS proxies) for uvloop and newer Python versions -- by :user:lezgomatt.

  Related issues and pull requests on GitHub:
  :issue:7686.

• Fixed reading fragmented WebSocket messages when the payload was masked -- by :user:bdraco.

  The problem first appeared in 3.11.17

  Related issues and pull requests on GitHub:
  :issue:10764.

v3.11.17

Compare Source

====================

Miscellaneous internal changes

• Optimized web server performance when access logging is disabled by reducing time syscalls -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10713.

• Improved web server performance when connection can be reused -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10714.

• Improved performance of the WebSocket reader -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10740.

• Improved performance of the WebSocket reader with large messages -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10744.

v3.11.16

Compare Source

====================

Bug fixes

• Replaced deprecated asyncio.iscoroutinefunction with its counterpart from inspect
  -- by :user:layday.

  Related issues and pull requests on GitHub:
  :issue:10634.

• Fixed :class:multidict.CIMultiDict being mutated when passed to :class:aiohttp.web.Response -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10672.

v3.11.15

Compare Source

====================

Bug fixes

• Reverted explicitly closing sockets if an exception is raised during create_connection -- by :user:bdraco.

  This change originally appeared in aiohttp 3.11.13

  Related issues and pull requests on GitHub:
  :issue:10464, :issue:10617, :issue:10656.

Miscellaneous internal changes

• Improved performance of WebSocket buffer handling -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10601.

• Improved performance of serializing headers -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10625.

v3.11.14

Compare Source

====================

Bug fixes

• Fixed an issue where dns queries were delayed indefinitely when an exception occurred in a trace.send_dns_cache_miss
  -- by :user:logioniz.

  Related issues and pull requests on GitHub:
  :issue:10529.

• Fixed DNS resolution on platforms that don't support socket.AI_ADDRCONFIG -- by :user:maxbachmann.

  Related issues and pull requests on GitHub:
  :issue:10542.

• The connector now raises :exc:aiohttp.ClientConnectionError instead of :exc:OSError when failing to explicitly close the socket after :py:meth:asyncio.loop.create_connection fails -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10551.

• Break cyclic references at connection close when there was a traceback -- by :user:bdraco.

  Special thanks to :user:availov for reporting the issue.

  Related issues and pull requests on GitHub:
  :issue:10556.

• Break cyclic references when there is an exception handling a request -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10569.

Features

• Improved logging on non-overlapping WebSocket client protocols to include the remote address -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10564.

Miscellaneous internal changes

• Improved performance of parsing content types by adding a cache in the same manner currently done with mime types -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10552.

v3.11.13

Compare Source

====================

Bug fixes

• Removed a break statement inside the finally block in :py:class:~aiohttp.web.RequestHandler
  -- by :user:Cycloctane.

  Related issues and pull requests on GitHub:
  :issue:10434.

• Changed connection creation to explicitly close sockets if an exception is raised in the event loop's create_connection method -- by :user:top-oai.

  Related issues and pull requests on GitHub:
  :issue:10464.

Packaging updates and notes for downstreams

• Fixed test test_write_large_payload_deflate_compression_data_in_eof_writelines failing with Python 3.12.9+ or 3.13.2+ -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:10423.

Miscellaneous internal changes

• Added human-readable error messages to the exceptions for WebSocket disconnects due to PONG not being received -- by :user:bdraco.

  Previously, the error messages were empty strings, which made it hard to determine what went wrong.

  Related issues and pull requests on GitHub:
  :issue:10422.

v25.3.0

Compare Source

Changes

• Restore support for generator-based field_transformers.
  #​1417

v25.2.0

Compare Source

Changes

• Checking mandatory vs non-mandatory attribute order is now performed after the field transformer, since the field transformer may change attributes and/or their order.
  #​1147
• attrs.make_class() now allows for Unicode class names.
  #​1406
• Speed up class creation by 30%-50% by compiling methods only once and using a variety of other techniques.
  #​1407
• The error message if an attribute has both an annotation and a type argument will now disclose what attribute seems to be the problem.
  #​1410

v5.5.2

Compare Source

===================

• Reduce number of @cached lock/unlock operations.

• Improve documentation.

• Update CI environment.

v2025.4.26

Compare Source

v3.4.2

Compare Source

Fixed

• Addressed the DeprecationWarning in our CLI regarding argparse.FileType by backporting the target class into the package. (#​591)
• Improved the overall reliability of the detector with CJK Ideographs. (#​605) (#​587)

Changed

• Optional mypyc compilation upgraded to version 1.15 for Python >= 3.8

v30.2: Protocol Buffers v30.2

Compare Source

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Compiler

• Restore generator headers in cmake install until the next breaking C++ release (#​20749) (protocolbuffers/protobuf@b69f653)

C++

• Remove dllexport attribute on variable definition. (#​20833) (protocolbuffers/protobuf@7831669)
• Restore generator headers in cmake install until the next breaking C++ release (#​20749) (protocolbuffers/protobuf@b69f653)
• Change how we decide which empty string implementation to use. (#​20708) (protocolbuffers/protobuf@221b2a0)

Java

• Remove dllexport attribute on variable definition. (#​20833) (protocolbuffers/protobuf@7831669)
• Add protobuf_maven artifacts to protobuf_maven_dev as well so they can still be referenced correctly using the dev namespace for dev-only targets. (#​20771) (protocolbuffers/protobuf@09b5078)
• Add volatile to featuresResolved (#​20766) (protocolbuffers/protobuf@b7f06f1)
• Restore generator headers in cmake install until the next breaking C++ release (#​20749) (protocolbuffers/protobuf@b69f653)
• Restore custom protobuf maven namespaces to avoid polluting main maven namespace for non-dev dependencies as well. (#​20739) (protocolbuffers/protobuf@f4b0a79)
• Fix Java concurrency issue in feature resolution for old <=3.25.x gencode using lazy feature resolution. (#​20751) (protocolbuffers/protobuf@2dc9f35)
• Fix lite classes in the protobuf-java Maven release to be JDK8 compatible. (#​20843) (protocolbuffers/protobuf@7a4c63b)

Kotlin

• Restore custom protobuf maven namespaces to avoid polluting main maven namespace for non-dev dependencies as well. (#​20739) (protocolbuffers/protobuf@f4b0a79)

Csharp

• Restore generator headers in cmake install until the next breaking C++ release (#​20749) (protocolbuffers/protobuf@b69f653)

Objective-C

• Restore generator headers in cmake install until the next breaking C++ release (#​20749) (protocolbuffers/protobuf@b69f653)

Python

• Restore generator headers in cmake install until the next breaking C++ release (#​20749) (protocolbuffers/protobuf@b69f653)

Ruby

• Restore generator headers in cmake install until the next breaking C++ release (#​20749) (protocolbuffers/protobuf@b69f653)

Other

• Restore JDK8 compatibility in Bazel for libraries with dependencies from Maven (e.g. //java/util) (#​20832) (protocolbuffers/protobuf@da9cadc)

v30.1: Protocol Buffers v30.1

Compare Source

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

Bazel

• Loosen py_proto_library check to be on the import path instead of full directory (i.e. excluding external/module-name prefix). (#​20569) (protocolbuffers/protobuf@3576a1f)

Compiler

• Fix python codegen crash when C++ features are used. (#​20577) (protocolbuffers/protobuf@250c550)

C++

• Fix python codegen crash when C++ features are used. (#​20577) (protocolbuffers/protobuf@250c550)

Java

• Remove Java runtime classes from kotlin release. (#​20607) (protocolbuffers/protobuf@4747628)

Kotlin

• Remove Java runtime classes from kotlin release. (#​20607) (protocolbuffers/protobuf@4747628)

Python

• Fix python codegen crash when C++ features are used. (#​20577) (protocolbuffers/protobuf@250c550)

Other

• Re-add system_python repo alias to MODULE.bazel (#​20662) (protocolbuffers/protobuf@ebb5224)

v30.0: Protocol Buffers v30.0

Compare Source

Announcements

• This version includes breaking changes to: Objective-C, Python, C++.
  • [Objective-C] Remove legacy WKT headers. (protocolbuffers/protobuf@d9caebc)
  • [Objective-C] Remove deprecated apis. (protocolbuffers/protobuf@2a52b90)
  • [Objective-C] Remove support for older generated code. (protocolbuffers/protobuf@cffa590)
  • [Objective-C] Remove GPBUnknownFieldSet. (protocolbuffers/protobuf@2b93422)
  • [Python] Fix closed enum validation under editions (protocolbuffers/protobuf@72b3eda)
  • [Python] Remove deprecated GetDebugString() from protobuf python cpp extension. (protocolbuffers/protobuf@721a452)
  • [Python] Remove deprecated reflection methods (protocolbuffers/protobuf@292f964)
  • [Python] Remove deprecated GetPrototype MessageFactory.GetPrototype(), (protocolbuffers/protobuf@c261b49)
  • [Python] Python nested message class qualname now contains the outer message name. (Previous qualname has the same result with name for nested message that outer message name was not included) (protocolbuffers/protobuf@0720536)
  • [Python] Remove deprecated Python RPC Service Interfaces (protocolbuffers/protobuf@5ba74b1)
  • [Python] Python setdefault behavior change for map field. (protocolbuffers/protobuf@81da6b9)
  • [Python] Remove deprecated py_proto_library macro.
  • [C++] Prohibit using Bazel+MSVC to build protobuf (protocolbuffers/protobuf@117e7bb)
  • [C++] Remove deprecated Arena::CreateMessage. (protocolbuffers/protobuf@d83a536)
  • [C++] Remove CMake submodule support in favor of fetched or installed dependencies. (protocolbuffers/protobuf@3f06ca4)
  • [C++] Flip default behavior for handling cmake dependencies. (protocolbuffers/protobuf@9cc685e)
  • [C++] Add ASAN poisoning after clearing oneof messages on arena. (protocolbuffers/protobuf@54d068e)
  • [C++] Upgrade return type of type_name() and cpp_type_name() from const char* to absl::string_view. (protocolbuffers/protobuf@a9ad51f)
  • [C++] Remove deprecated RepeatedPtrField::ClearedCount(). (protocolbuffers/protobuf@e8e3253)
  • [C++] Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
  • [C++] Strip ctype from options in C++ (protocolbuffers/protobuf@aebf8b9)
  • [C++] Remove MutableRepeatedFieldRef::Reserve() in reflection (protocolbuffers/protobuf@913f7b0)
  • [C++] Remove deprecated JsonOptions alias. (protocolbuffers/protobuf@e2eb0a1)
  • [C++] Remove deprecated Arena::GetArena. (protocolbuffers/protobuf@30ed452)
• Protobuf News may include additional announcements or pre-announcements for upcoming changes.
• Migration Guide includes migration instructions for breaking changes for this release.

Bazel

• Remove reference to cc_proto_aspect (protocolbuffers/protobuf@fa02f76)
• Remove deprecated bazel/system_python.bzl alias. (protocolbuffers/protobuf@00f108c)

Compiler

• Add notices.h with information about our dependencies' licenses and add --notices flag to protoc to print the contents of that file. (protocolbuffers/protobuf@a7df327)
• Have the protoc CLI properly report any parser warnings. (protocolbuffers/protobuf@cafeaa4)
• Split protoc apart from libprotoc in our cmake configs. (protocolbuffers/protobuf@b4b93b3)
• Begin adding extension numbers to SourceCodeInfo and FileDescriptorSet for tooling purposes. (protocolbuffers/protobuf@9d7236b)
• Fix various unsigned to signed comparison warnings. (#​17212) (protocolbuffers/protobuf@67de087)

C++

• Fixing staleness tests (protocolbuffers/protobuf@6abaf77)
• Add notices.h with information about our dependencies' licenses and add --notices flag to protoc to print the contents of that file. (protocolbuffers/protobuf@a7df327)
• Backport: Remove if_constexpr usage for future Abseil compatibility (#​20488) (protocolbuffers/protobuf@450ee76)
• Add tests for older gcc versions we still support (#​20463) (protocolbuffers/protobuf@0778473)
• Fix a bug in handling of implicit-presence string_view fields. (#​20403) (protocolbuffers/protobuf@81196ac)
• Remove rules_rust dependency from MODULE.bazel for 30.x (#​20310) (protocolbuffers/protobuf@b8248f6)
• Upgrade abseil-cpp to 2025012 and use @​com_google_absl -> @​abseil-cpp and com_google_googletest -> @​googletest canonical BCR names. (#​20295) (protocolbuffers/protobuf@df849cc)
• Replace std::any with a custom solution. (#​20251) (protocolbuffers/protobuf@6250d09)
• Make DebugString print debug output, enable debug markers for debug output (protocolbuffers/protobuf@9a03332)
• Fix missing port_undef (#​20052) (protocolbuffers/protobuf@0644388)
• Use __builtin_expect_with_probability for proto field presence checks. (protocolbuffers/protobuf@e958419)
• Enable meta-tagging for redaction purposes (protocolbuffers/protobuf@1f48795)
• Breaking change: Prohibit using Bazel+MSVC to build protobuf (protocolbuffers/protobuf@117e7bb)
• Breaking change: Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
• Print the presence probability when analysis is enabled. (protocolbuffers/protobuf@d4ba7ff)
• Split protoc apart from libprotoc in our cmake configs. (protocolbuffers/protobuf@b4b93b3)
• Breaking change: Strip ctype from options in C++ (protocolbuffers/protobuf@aebf8b9)
• Breaking change: Remove MutableRepeatedFieldRef::Reserve() in reflection (protocolbuffers/protobuf@913f7b0)
• Remove stale references to C++14. (protocolbuffers/protobuf@f4cc92c)
• Breaking change: Upgrade return type of type_name() and cpp_type_name() from const char* to absl::string_view. (protocolbuffers/protobuf@a9ad51f)
• Update cmake minimum version to >=3.16. (protocolbuffers/protobuf@21f535c)
• Migrate coded output stream arguments from const std::string& to absl::string_view. (protocolbuffers/protobuf@0361a59)
• Breaking change: Remove deprecated Arena::GetArena. (protocolbuffers/protobuf@30ed452)
• Remove the time (or time-based) entropy being added to Map's seed. (protocolbuffers/protobuf@a7875bb)
• Don't use CLOCK_UPTIME_RAW if it won't be defined (#​16951) (protocolbuffers/protobuf@097dcda)
• Fix DEPENDENCIES in protobuf_generate() to accept multiple values instead of silently dropping (protocolbuffers/protobuf@52887e1)
• Use ABSL_PREDICT_TRUE|FALSE instead of PROTOBUF_PREDICT_TRUE|FALSE. (protocolbuffers/protobuf@fd47730)
• Breaking change: Flip default behavior for handling cmake dependencies. (protocolbuffers/protobuf@9cc685e)
• Use [[maybe_unused]] instead of PROTOBUF_UNUSED. (protocolbuffers/protobuf@a7dd155)
• Use [[nodiscard]] instead of PROTOBUF_NODISCARD (protocolbuffers/protobuf@1ceedf8)
• Breaking change: Remove deprecated JsonOptions alias. (protocolbuffers/protobuf@e2eb0a1)
• Generate internal hasbits for singular proto3 implicit presence fields. (protocolbuffers/protobuf@3e82ed4)
• Add name mangling to nested names that collide with known generated names, like (protocolbuffers/protobuf@f2cf85c)
• Breaking change: Remove deprecated RepeatedPtrField::ClearedCount(). (protocolbuffers/protobuf@e8e3253)
• Breaking change: Add ASAN poisoning after clearing oneof messages on arena. (protocolbuffers/protobuf@54d068e)
• Breaking change: Remove deprecated Arena::CreateMessage. (protocolbuffers/protobuf@d83a536)
• Change DynamicCastMessage to throw a std::bad_cast exception when exceptions (protocolbuffers/protobuf@33bbbeb)
• Fixed a missing check in wire format verification. (protocolbuffers/protobuf@2ac862f)
• Comment change: clarifies that the field/value order is based on textual order in the file, not the order of the enums. (protocolbuffers/protobuf@f92335b)
• Bump minimum C++ version to C++17 after branch cut for v29. (protocolbuffers/protobuf@fe53593)
• Bump abseil dependency version from 2023080.1 to 2024072.0. (protocolbuffers/protobuf@c75095b)
• Breaking change: Remove CMake submodule support in favor of fetched or installed dependencies. (protocolbuffers/protobuf@3f06ca4)
• Support fetching CMake dependencies via -Dprotobuf_FETCH_DEPENDENCIES=ON (protocolbuffers/protobuf@d3735bc)
• Avoid field id comparisons in ExtensionSet serialization in case of single range. (protocolbuffers/protobuf@8f6a7a2)
• Let ArenaStringPtr debug-fail if it ever attempts to clear a default string. (protocolbuffers/protobuf@6c9c12c)
• Fix various unsigned to signed comparison warnings. (#​17212) (protocolbuffers/protobuf@67de087)
• Remove Protobuf-C++.podspec release. (protocolbuffers/protobuf@b204518)

Java

• Split maven dependencies into dev vs local (#​20549) (#​20558) (protocolbuffers/protobuf@a5c906a)
• Refactor TextFormat.Printer.MapEntryAdapter to handle more entry types. This will properly sort map keys for DynamicMessage maps. (protocolbuffers/protobuf@84769d3)
• Re-Expose UnderscoresToCapitalizedCamelCase for plugins in OSS. (protocolbuffers/protobuf@94ae26d)
• Upgrade return type of several string returning functions to absl::string_view. (protocolbuffers/protobuf@d1990d9)
• Fix mishandling of open enum + explicit presence fields. (protocolbuffers/protobuf@0ccd845)
• Disable useShortRepeatedPrimitives for Printer.DEFAULT_DEBUG_FORMAT (protocolbuffers/protobuf@1900cbe)
• Optimize Java gencode version validation (protocolbuffers/protobuf@59a8de6)
• Make Java consistently reject unmatched end-group tag. (protocolbuffers/protobuf@a4d4bfe)
• Make Java-lite reject unmatched end-group tag. (protocolbuffers/protobuf@84e81cf)
• Fix handling of implicit field presence in mergeFrom to match the behavior in other places. (protocolbuffers/protobuf@3e0f82e)
• Use ABSL_PREDICT_TRUE|FALSE instead of PROTOBUF_PREDICT_TRUE|FALSE. (protocolbuffers/protobuf@fd47730)
• Use [[maybe_unused]] instead of PROTOBUF_UNUSED. (protocolbuffers/protobuf@a7dd155)
• Remove deprecation warnings for Timestamp and Duration add/subtract/between that we do not yet have alternatives to. (protocolbuffers/protobuf@f6cddd2)
• Add support to print repeated fields with primitive values using short notation (protocolbuffers/protobuf@b8d3567)
• Fix unexpected NumberFormatException in Durations.parse() by replacing with documented thrown ParseException. (protocolbuffers/protobuf@ee5aa49)
• Give Kotlin jars an OSGi Manifest (#​18812) (protocolbuffers/protobuf@27ddb9c)
• Lite: Remove intermediary dynamicMethod function trampolines (protocolbuffers/protobuf@25724ab53e919a5ef68782745d30