Golang gRPC Chat

Development

Dependencies

Make sure to run go mod vendor to ensure all dependencies are within the projects vendor folder

Protobuf

Make sure you have the following binaries installed

• protoc
  • macos: run brew install protobuf, make sure to install version 3.*
• protoc-gen-go
  • comes for free with the dependency github.com/golang/protobuf
  • make sure GOPATH binaries are part of your PATH (export PATH="$PATH:$(go env GOPATH)/bin")

To generate the protobuf code run from the project root
$ protoc -I pb/ pb/pb.proto --go_out=plugins=grpc:./pb --go_opt=paths=source_relative

Configuration

For now all configuration is hardcoded in config/constants.go

Running the applications

gRPC server that keeps history per chatroom
$ go run cmd/server/main.go

Web(Socket) server that hosts the frontend and does some bi-directional message streaming with the gRPC server
$ go run cmd/chatroom/main.go

I wrote a simulation to get a grasp of how the default case of a select statement works in go. I kept it here because it might help someone understand it better too.
$ go run cmd/simulate_disconnected_client/main.go

Packages / Folders

Folder	Contents
chat	WebSocket client/server code and gRPC implementations
cmd	Application entrypoints
config	Application configuration
pb	Protobuf files and generated proto code
static	Front-end code of chatroom app