Golang gRPC bidirectional streaming example

• client sends random numbers to server
• server receives number and sends it back if the number greater than all previous numbers
• both client and server handle context errors (try to close client during send)

Requirements

• go 1.17.1
• protobuf installed
• go support for protobuf installed

Installation

MacOS

brew install go
brew install protobuf
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.1

Make sure protoc-gen-go added in PATH

To add it to PATH you can use bash profile for example.

Edit vim ~/.bash_profile, add: export PATH="$PATH:$(go env GOPATH)/bin", run source ~/.bash_profile to apply changes.

Linux

TBD

Complie

make all

It should create two binaries server and client

Use

Start server ./server and in other terminal start ./client

Client output example:

./client
2017/12/01 14:16:54 0 sent
2017/12/01 14:16:54 1 sent
2017/12/01 14:16:54 new max 1 received
2017/12/01 14:16:55 2 sent
2017/12/01 14:16:55 new max 2 received
2017/12/01 14:16:55 0 sent
2017/12/01 14:16:55 0 sent
2017/12/01 14:16:55 4 sent
2017/12/01 14:16:55 new max 4 received
2017/12/01 14:16:55 0 sent
2017/12/01 14:16:56 6 sent
2017/12/01 14:16:56 new max 6 received
2017/12/01 14:16:56 3 sent
2017/12/01 14:16:56 2 sent
2017/12/01 14:16:56 finished with max=6

Server output:

./server
2017/12/01 14:16:54 start new server
2017/12/01 14:16:54 send new max=1
2017/12/01 14:16:55 send new max=2
2017/12/01 14:16:55 send new max=4
2017/12/01 14:16:56 send new max=6
2017/12/01 14:16:56 exit