rust-protobuf

Protobuf implementation in Rust.

Written in pure rust
Generates rust code
Has runtime library support for generated code (Coded{Input|Output}Stream impl)
Supports both Protobuf versions 2 and 3
and more

Where is documentation

Documentation is moved to the crates.

(Note both versions 2 and 3 or rust-protobuf support both proto2 and proto3 syntax of .proto files.)

About versions and branches

Version 2

2.*.* is the latest stable version. 2.*.* versions follow semver conventions, including generated code: code generated with 2.*.* is compatible with newer 2.*.*.

Version 3

Compared to version 2, it has:

runtime reflection support
JSON and text format parsing and printing (based on reflection)
dynamic messages (messages which can be created using schema but without generated code)

Version 3 of rust-protobuf is mostly feature-complete, but to release it:

more testing needed
API need to be polished since breaking API is not semver-friendly

Tracking issue for rust-protobuf=3.

The crate needs help:

testing
documentation
examples to be used as documentation
feedback on API design
feedback on implementation
pull requests
a new maintainer

Changelog

See CHANGELOG.md for a list of changes and compatility issues between versions.

Related projects

prost — another protobuf implementation in Rust, also has gRPC implementation
quick-protobuf — alternative protobuf implementation in Rust
grpc-rs — another gRPC implementation for Rust
grpc-rust — incomplete implementation of gRPC based on this library