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gophercon 2018: demystifying grpc reflection and grpcurl with joshua humphries

this tutorial builds upon joshua humphries' excellent talk at gophercon 2018 on grpc reflection and `grpcurl`. we'll delve into the concepts, demonstrate how to implement grpc reflection in your go applications, and show you how to use `grpcurl` for effortless interaction and debugging of grpc services.

*why grpc reflection and grpcurl are essential*

grpc is a powerful rpc framework, but it requires service definitions (using protocol buffers) for clients to understand the available methods and data structures. traditionally, clients need the `.proto` files or generated code to interact with a grpc service. this creates a challenge:

*client-side dependencies:* clients depend on having access to the service definitions, which might not always be readily available, especially in dynamic or distributed environments.
*discovery issues:* discovering the available services and methods becomes difficult without centralized documentation or distribution of `.proto` files.
*debugging complexity:* manually creating client code for testing grpc services during development or debugging can be cumbersome.

*grpc reflection* solves these problems by allowing a client to dynamically query a grpc service for its structure at runtime. the service essentially "reflects" its definition back to the client.

*`grpcurl`* is a command-line tool that leverages grpc reflection to interact with grpc services. it eliminates the need to write client code. you can explore available services, list methods, and send requests directly from the command line, making it invaluable for development, testing, and debugging.

*outline*

1. *understanding grpc reflection concepts*
what is grpc reflection?
how it works: the reflection service
benefits of using grpc reflection
2. *implementing grpc reflection in go*
setting up a grpc server
importing the reflection p ...

#Gophercon2018 #gRPCReflection #grpcurl

Gophercon 2018
gRPC reflection
grpcurl
Joshua Humphries
Go programming
microservices
API development
gRPC tools
command-line interface
service discovery
remote procedure calls
Go community
software engineering
developer tools
open source