gRPC to REST

This recipe demonstrates receiving request from a gRPC client and routing to REST end point based on method names.

Installation

• Install Go
• Install protoc-gen-go library

go get github.com/golang/protobuf/protoc-gen-go

• Download protoc for your respective OS from here.
  Extract protoc-$VERSION-$PLATFORM.zip file get the protoc binary from bin folder and configure it in PATH.

Setup

git clone https://github.com/project-flogo/grpc
cd grpc
go install
cd examples/json/grpc-to-rest

Create the gateway:

flogo create -f flogo.json
cd MyProxy
flogo install github.com/project-flogo/grpc/proto/grpc2rest
flogo build

Testing

Start proxy gateway.

bin/MyProxy

#1 Testing PetById method

Run sample gRPC client.

go run main.go -client -port 9096 -method pet -param 2

Output can be seen as below.

res : pet:<id:2 name:"cat2" >

#2 Testing UserByName method

Run sample gRPC client.

go run main.go -client -port 9096 -method user -param user1

Output can be seen as below.

res : user:<id:1 username:"user1" email:"[email protected]" phone:"123-456-7890" >

#3 Testing PetPUT method

Run sample gRPC client.

go run main.go -client -port 9096 -method petput -param 2,testpet

Output can be seen as below.

res : user:<id:1 username:"user1" email:"[email protected]" phone:"123-456-7890" >