grpc-server example with proto reflection

[Optional] Build protobufs for example-grpc-server

Do it only in case if you want to update client/server stubs or descriptor binary file for grpc. Protofiles were built using buf (buf installation guide.

cd cmd/examples/grpcserver
buf generate
buf build -o gen/user/v1/user.desc

Run example-grpc-server

1. Run example-grpc-server

   • make build-example-grpc-server
   • ./example-grpc-server

2. Run grpc-gateway

   • make build service
   • ./grpc-rest-proxy

3. Send http request to grpc-gateway (example)

 curl -X GET http://localhost:8080/api/user/John 

Following table shows examples of tested routes patterns on grpc-gateway.

Route patterns:

Method	Pattern	Path	additional_bindings	query params	body
GET	/api/user/{username}	/api/user/john			*
GET	/api/users/{username}	/api/users/john	/api/users/{username}/country/{country}
GET	/api/users/job/{job.job_title=/*/}	/api/users/job/architect
GET	/api/users/filter	/api/users/filter?username=john&country=usa		?username=&country=&company=&jobtype=
GET	/api/users/address/{address.country=/*/}/posts/{type=**}"	/api/users/address/alabama/posts/promotion
GET	/api/users/summary/{summary=**}	/api/users/summary/username/country/company/jobtype
POST	/api/users/create	/api/users/create			user
DELETE	/api/user/delete/{username=/*/}	/api/user/delete/john
PUT	/api/user/username/{username}/{job.job_title=}/	/api/user/username/john/architect/country/usa