Beginner LevelREST APIs & Web Services
What is gRPC and how does Protocol Buffers (Protobuf) compare to REST/JSON?
❓ Interview Prompt: Compare REST/JSON (text-based, human-readable, HTTP/1.1 & HTTP/2) vs gRPC/Protobuf (binary serialized, HTTP/2 multiplexing, ultra-fast internal microservices).
gRPC is an open-source high-performance Remote Procedure Call (RPC) framework developed by Google:
Differences from REST:
•
Serialization: REST uses text-based JSON ('~100-500 bytes'). gRPC uses binary Protocol Buffers (Protobuf) ('~20-50 bytes'), achieving 5x-10x smaller payload size!
•
Transport Protocol: gRPC mandates HTTP/2 (multiplexing streams, header compression).
•
Schema Enforcement: Protobuf '.proto' files strictly generate strongly-typed code for client/server in multiple programming languages.
Code Implementation Example
yaml
// user.proto schema definition
syntax = "proto3";
message UserRequest {
string user_id = 1;
}
message UserResponse {
string id = 1;
string name = 2;
string email = 3;
}
service UserService {
rpc GetUser (UserRequest) returns (UserResponse);
}💡Protocol Buffer v3 service and message schema definition.
🎯 Interview Key Takeaway
Use REST/JSON for public web APIs; use gRPC/Protobuf for high-performance internal microservice communication.
#gRPC#Protobuf#REST vs gRPC#Beginner
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