gRPC Gateway SDK

A lightweight SDK that allows you to expose your gRPC services over HTTP/JSON.
This SDK accepts HTTP requests, invokes the corresponding gRPC service methods, and returns JSON responses generated from protobuf messages.

👉 No .proto files are required to use your gRPC services with this SDK.

🚀 Features

• Expose gRPC services via HTTP endpoints.
• Automatically translates:
  • HTTP request → gRPC method call
  • Protobuf response → JSON response
• Authentication support for internal communication between Gateway ↔ Service:
  • Supported auth types:
    • API_KEY
    • JWT_TOKEN
  • Services can define their own header name and value during registration.
  • Services can re-register with a new token anytime, and the Gateway will automatically use the updated token.
• Simple service registration API.
• Runs as a standalone HTTP service.
• Easy integration with existing gRPC applications.

🔑 Authentication Support

The Gateway now supports authentication for service communication.
When a service registers itself, it can specify the type of authentication and provide the required header and value.

Currently supported auth types:

• API_KEY
• JWT_TOKEN

Example: Registering a Service with API_KEY Authentication

let result = gateway.service_registry.register(ServiceRegisterRequest {
    service_name: String::from("users.UserService"),
    host: String::from("127.0.0.1"),
    port: String::from("50051"),
    oauth_config: Some(AuthType::APIKey {
        header_name: String::from("x-api-key"),
        value: String::from("test_api_token"),
    }),
});