Does gRPC server work with a REST (JSON) client?

[vna...@gmail.com]

Hi,

Does a gRPC server work with a REST (JSON) Client? or do I need to have a intermediary like ESP or grpc-gateway? Is there any grpc-gateway for java implementation?

thanks,
Venkat

[Yugui]

It depends on what you actually want to do.

If you need to expose your grpc-based Java application as a backend of RESTful APIs, nothing prevents you from combining it with grpc-gateway. Even though grpc-gateway itself is written in Go, it does not actually matter because grpc-gateway works as an independent process by design.

If you need a convenient way to call gRPC methods from command line, you can consider grpc_cli, polyglot, grpcurl, ...

If you need to marshal your payloads not into protobuf but into JSON, and if gRPC wire protocol over HTTP/2 does not actually matter with you, you can use a custom marshaler in your gRPC server.

Thanks,

Yuki Yugui Sonoda

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