grpc-gateway VS grpcurl

it lacks flexibility but i really enjoy grpc-gateway for 99% of my work

https://github.com/grpc-ecosystem/grpc-gateway

gRPC Gateway is a protoc plugin that reads gRPC service definitions and generates a reverse proxy server that translates a RESTful JSON API into gRPC.

I don't have any example that's public atm, but the guide in grpc-gateway is pretty clear/can be followed step by step.

https://github.com/grpc-ecosystem/grpc-gateway

To integrate with Fiber, I used the Fiber Adaptor (also pretty straightforward): https://docs.gofiber.io/api/middleware/adaptor

I wonder if they would be happy with something like this: https://github.com/grpc-ecosystem/grpc-gateway

Protobuf is used is massively scaled services like firebase. But you'll still see JSON in streamed realtime services like AWS Kinesis. Hopefully google had a return on investment for creating and using this protocol, but it's not hard to prove that it's far from essential. Out of apparent convenience I use grpc-gateway so I can expose both Protobuf and JSON, but honestly I wouldn't do it again

GRPC is an alternative to rest, rest and GRPC both use the http protocol. But you won’t be able to use fetch to call a GRPC endpoint, you should look into setting up a GRPC proxy within the application(hopping you have access to the source code) grpc-gateway. If you don’t have access you’ll have to create a new container that proxies the calls

(There is an option called google.api.http, that lets you set up a URL that can be used to make HTTP/1 REST requests, which get translated to gRPC calls if you're using grpc-gateway as a proxy in front of your service. That has nothing to do with the requests that are made by gRPC clients and servers themselves.)

Have you looked at https://github.com/grpc-ecosystem/grpc-gateway ?

protoc-gen-grpc-gateway — plugin for creating a gRPC REST API gateway. It allows gRPC endpoints as REST API endpoints and performs the translation from JSON to proto. Basically, you define a gRPC service with some custom annotations and it makes those gRPC methods accessible via REST using JSON requests.

grpcurl

The API server will be built and start running on port 50051. You can test the functionality using a gRPC client of your choice like grpcurl or Postman.

> What is the ubiquitous utility for interacting with gRPC? We have curl for REST. What is openAPI of gRPC?

grpcurl[1] combined with gRPC server reflection[2]. The schema is compiled into the server as an encoded proto which is exposed via server reflection, which grpcurl reads to send correctly encoded requests.

[1] https://github.com/fullstorydev/grpcurl

The whole idea behind the post is that accessing the gRPC service with regular tools is impossible. To test, we need a dedicated tool nonetheless. I found grpcurl. Let's install it and use it to list available services:

gRpcurl is a cool little tool to look at btw. Had to use it at my job before. Can call a gRPC via a curl like command. Regular curl doesn't support HTTP2. Had to use TLS with some tokens even. But you can reference a local .proto(gRPC protobuf file for the call) and make things easier for yourself if you hate reading instructions on command line args like I do.

A simple GRPC client built using grpcurl.

Try testing with grpcurl, using the -H or -rpc-header flags to set the appropriate header.