2.8.0

• Added support for client interceptors, which can be configured through
  Client constructor's interceptors parameter. Interceptors will be
  executed by Client.$createStreamingCall and Client.$createUnaryCall.
  Using interceptors requires regenerating client stubs using version 19.2.0 or
  newer of protobuf compiler plugin.
• Client.$createCall is deprecated because it does not invoke client
  interceptors.
• Fix issue #380 causing
  incorrect duplicated headers in gRPC-Web requests.
• Change minimum required Dart SDK to 2.8 to enable access to Unix domain sockets.
• Add support for Unix domain sockets in Socket.serve and ClientChannel.
• Fix issue #331 causing
  an exception in GrpcWebClientChannel.terminate().

2.7.0

2.7.0

• Added decoding/parsing of grpc-status-details-bin to pass all response
  exception details to the GrpcError thrown in Dart, via
  #349.
• Dart SDK constraint is bumped to >=2.3.0 <3.0.0 due to language version
  in the generated protobuf code.

2.6.0

• Create gRPC servers and clients with [Server|Client]TransportConnnection.
  This allows callers to propvide their own transport configuration, such
  as their own implementation of streams and sinks instead of sockets.

2.5.0

• Expose a validateClient method for server credentials so gRPC server
  users may know when clients are loopback addresses.

2.4.1

• Plumb stacktraces through request / response stream error handlers.
• Catch and forward any errors decoding the response.

2.4.0

• Add the ability to bypass CORS preflight requests.

Dart 2 fixes

• Fixes for supporting Dart 2.

Server tweaks

• Moved TLS credentials for server into a separate class.
• Added support for specifying the address for the server, and support for serving on an ephemeral port.

Channel credentials

• Split out TLS credentials to a separate class.

Cloud Authentication

• Added authentication metadata providers, optimized for use with Google Cloud.
• Added service URI to metadata provider API, needed for Json Web Token generation.
• Added authenticated cloud-to-prod interoperability tests.
• Refactored connection logic to throw initial connection errors early.

Prepare for Dart 2

• Updated generated code in examples using latest protoc compiler plugin.
• Dart 2.0 fixes.
• Changed license to Apache 2.0 to match grpc organization.

Metadata providers

• Implemented support for per-RPC metadata providers. This can be used for authentication providers which may need to obtain or refresh a token before the RPC is sent.

First release

• Core gRPC functionality is implemented and passes gRPC compliance tests.

The API is shaping up, but may still change as more advanced features are implemented.