http-to-grpc-gateway

Example of using grpc-gateway and httputil.ReverseProxy to migrate a service to Go and gRPC by automatically proxying requests for unimplemented methods to the old service.

GopherCon 2019 Lightning Talk

Requirements

• Go 1.12+ (https://golang.org/dl/)
• Node 10+ (https://nodejs.org/en/download/)
• protoc 3.7.0+ (https://github.com/protocolbuffers/protobuf/releases)
• protoc-gen-go (go get -u github.com/golang/protobuf/protoc-gen-go)
• protoc-gen-grpc-gateway (go get -u github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway)

Running

Node

$ cd node
$ npm install
$ npm start

Go

$ cd go
$ go run main.go

Modifying

Node

1. Modify node/index.js.

Go

1. Modify go/hello/hello.proto.
2. In go/hello, run go generate.
3. Implement handler in go/main.go.