gRPC+ProtocolBuffers Chat by Flutter

gRPC Chat laboratory. It allows chat from each supported flutter platform: Linux, macOS, Windows, Android, iOS and Web by using gRPC and ProtocolBuffers also backend grpc microservice is written in Dart Lang. Generated Dart model files are shared with flutter app and micro-service from model package.

Native implementations

There are 2 native(Kotlin and Swift) alternatives to flutter Android and iOS builds:

gRPC_Chat_android

gRPC_Chat_iOS

Running dart microservice

cd server
dart pub get                          #use -upgrade- instead to run with latest dependencies version.  
dart run bin/main.dart localhost 8888 #Runs on localhost:8888

Run Flutter app

flutter pub get  #use -upgrade- instead to run with latest dependencies version.
flutter run      #It will ask you for platform choise.

Run Envoy L7 proxy to support gRPC on Web

To support gRPC on web we use Envoy proxy. It "convert/translate" gRPC calls to web-http2 calls from XHR. Note that it is only necessary for web.

FlutterWebApp --port_9000--> envoy proxy --port_8888--> gRPC service

FlutterNoWebApp --port_8888--> gRPC service

Installing on macOS.

brew update
brew install envoy

Note: To install it on another SO see offcial doc about it

Running

#Edit that yaml file if you use different port (default: 8888).
envoy --config-path server/setup/envoy/service_envoy.yaml

Developing

Generate Dart code from proto files

Installation guide

protoc -I. --dart_out=grpc:model/lib/data/generated/protos/ model/protos/chat.proto