Protobuf Hello Tuturial

Following tutorial from https://grpc-ecosystem.github.io/grpc-gateway/docs/tutorials/introduction/

Building

Generating protobuf files

This step is only needed if the .proto files are changed. All generated files are at the gen path.

Generating files:

buf generate

Compiling

go build . 

Testing

First test the gRPC endpoints. Run the program at another terminal go run .

# List endpoints
$ grpcurl -plaintext localhost:8080 list
grpc.reflection.v1alpha.ServerReflection
helloworld.Greeter

# Call SayHello
$ grpcurl -plaintext -d '{"name":"Hello"}' localhost:8080 helloworld.Greeter/SayHello
{
  "message": "Hello world"
}

Now let's test the REST endpoint

# Test the post endpoint
$ $ curl -d '{"name":"Hello"}' localhost:8090/v1/example/hello
{"message":"Hello world"}

# Test the get endpoint
$ curl  localhost:8090/v1/example/hello/hello
{"message":"hello world (GET)"}

Comments

• Got error on tutorial not having a go _package.
• To generate code: buf generate
• Curl: grpcurl -plaintext -d '{"name": "abacaxi"}' localhost:8080 helloworld.Greeter/SayHello
• List: grpcurl -plaintext localhost:8080 list

protoc -I ./proto -I ./
--go_out ./gen/proto --go_opt paths=source_relative
--go-grpc_out ./gen/proto --go-grpc_opt paths=source_relative
--grpc-gateway_out ./gen/proto --grpc-gateway_opt paths=source_relative
./proto/helloworld/hello_world.proto