protobuf 0.7.1

  • Installing
  • Versions
  • 94

Build Status pub package

Provides runtime support for a Dart implementation of protobufs.

Typically one do not need to import this library–only libraries generated by the protoc plugin import this library directly.

If your library or application uses generated protobuf libraries, add this library as a dependency.



  • Fix type in PbList.fold() for Dart 2.
  • Small performance tweaks for DDC.


  • Added fast getters for common types.
  • Only pass index instead of both tag and index to accessors.
  • Delegate more methods to underlying list in PbList.
  • Small fixes for Dart 2.0.


  • Added enumValues to FieldInfo. Fixes #63.
  • Small performance optimization when deserializing repeated messages from JSON.
  • Type annotations for strong mode.


  • Use real generic syntax instead of comment-based.
  • Support v2 dev SDKs.


  • Unknown enum values are ignored when parsing JSON, instead of throwing an exception.


  • Resolved a strong-mode error.


  • Performance: Avoid excessive cloning in merge.
  • Performance: Use code patterns that dart2js handles better.


  • fix zigzag function so all coded buffer reader tests work on dart2js.


  • make PbMixin constructor public for use within protoc plugin.


  • Revert previous change because it causes strong mode type error in the generated code. We will revisit this in a new version of mixin support.


  • Use a more refined implementation of Map in PbMapMixin


  • Performance: eliminate some dynamic calls.


  • Bugfix: remove dependency on pkg/crypto for real.


  • Require at least Dart SDK 1.13.

  • Removed dependency on pkg/crypto.


  • Experimental support for strong mode.
  • Fixed an issue with GeneratedMessage operator== and Map mixins
  • Added declaration of GeneratedMessage clone method


  • Support the latest version of package fixnum.


  • Reorganized internals to improve performance. We now store field values in a list instead of a map. Private properties and methods are all moved to the _FieldSet class. There are new entry points for generated getters, hazzers, and setters. Improved JSON decoding performance.
  • Dropped compatibility with .pb.dart files before 0.4.2 by removing internal constants from GeneratedMessage. Also, protoc plugins before 0.5.0 won't work.


  • Renamed FieldType to PbFieldType.

0.4.1 - DO NOT USE

  • added FieldType class. It turned out that FieldType is a commonly used name, even in .proto files. This is renamed to PbFieldType in 0.4.2.
  • Added support for observing field changes. For now, this can only be enabled by using a mixin to override the eventPlugin getter.
  • Removed optional third parameter from setField(). It was only intended for internal use, and could be used to defeat type checks on fields.
  • clearExtension() removes the value and extension in all cases. (Before, the extension would be kept and the list cleared for repeated fields.)
  • Upcoming: clearField() will require its argument to be a known tag number (which could be an extension). For now, this is only enforced when a mixin provides an eventPlugin.


  • Add ReadonlyMessageMixin. The generated message classes use this to for the default values of message fields.


  • Add meta.dart which declares reserved names for the plugin.


  • Add GeneratedService and ProtobufClient interfaces.


  • Add experimental mixins_meta library
  • Add experimental PbMapMixin class (in a separate library).
  • Fix bug where ExtensionRegistry would not be used for nested messages.


  • More docs.


  • Added mergeFromMap() and writeToJsonMap()
  • Fixed an analyzer warning.


  • Bugfix for setRange(): Do not assume Iterable has a sublist() method.


  • Simplify some types used in is checks and correct PbList to match the
  • signature of the List setRange method.


  • Bugfix for incorrect decoding of protobuf messages: Uint8List views with non-zero offsets were handled incorrectly.


  • Allow constants as field initial values as well as creation thunks to reduce generated code size.

  • Improve the performance of reading a protobuf buffer.

  • Fixed truncation error in least significant bits with large Int64 constants.

1. Depend on it

Add this to your package's pubspec.yaml file:

  protobuf: "^0.7.1"

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter packages get

Alternatively, your editor might support pub get or packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:protobuf/protobuf.dart';
Version Uploaded Documentation Archive
0.7.1 Feb 22, 2018 Go to the documentation of protobuf 0.7.1 Download protobuf 0.7.1 archive
0.7.0 Jan 12, 2018 Go to the documentation of protobuf 0.7.0 Download protobuf 0.7.0 archive
0.6.0 Oct 25, 2017 Go to the documentation of protobuf 0.6.0 Download protobuf 0.6.0 archive
0.5.5 Aug 14, 2017 Go to the documentation of protobuf 0.5.5 Download protobuf 0.5.5 archive
0.5.4 Apr 20, 2017 Go to the documentation of protobuf 0.5.4 Download protobuf 0.5.4 archive
0.5.3+2 Mar 29, 2017 Go to the documentation of protobuf 0.5.3+2 Download protobuf 0.5.3+2 archive
0.5.3+1 Mar 27, 2017 Go to the documentation of protobuf 0.5.3+1 Download protobuf 0.5.3+1 archive
0.5.3 Sep 1, 2016 Go to the documentation of protobuf 0.5.3 Download protobuf 0.5.3 archive
0.5.2 Jun 22, 2016 Go to the documentation of protobuf 0.5.2 Download protobuf 0.5.2 archive
0.5.1+4 Jun 1, 2016 Go to the documentation of protobuf 0.5.1+4 Download protobuf 0.5.1+4 archive

All 39 versions...


This feature is new.
We welcome feedback.
More details: scoring.

We analyzed this package, and provided a score, details, and suggestions below.

  • completed on Feb 22, 2018
  • Dart: 2.0.0-dev.20.0
  • pana: 0.10.1


Describes how popular the package is relative to other packages. [more]
89 / 100
Code health derived from static analysis. [more]
100 / 100
Reflects how tidy and up-to-date the package is. [more]
100 / 100
Overall score:
Weighted score of the above. [more]


Detected platforms: Flutter, web, other

No platform restriction found in primary library package:protobuf/protobuf.dart.


  • The description is too short.

    Add more detail about the package, what it does and what is its target use case. Try to write at least 60 characters.

  • Package is pre-v1 release.

    While there is nothing inherently wrong with versions of 0.*.*, it usually means that the author is still experimenting with the general direction API.

  • Maintain an example.

    Create a short demo in the example/ directory to show how to use this package. Common file name patterns include: main.dart, example.dart or you could also use protobuf.dart.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.21.0 <2.0.0
fixnum >=0.9.0 <0.11.0 0.10.7
Dev dependencies
test >=0.12.0 <0.13.0