api-gateway-config.md

API Gateway Architecture

This diagram visualizes the API gateway workflow with proxy routing to backend services.

API Gateway Workflow

graph TD
    subgraph APIGateway["API Gateway Workflow"]
        HS["HTTP Server (:8090)"] --> GR["Gateway Router"]

        subgraph Middleware["Middleware Stack"]
            CORS["CORS Middleware"] --> LOG["Logging Middleware"]
            LOG --> RL["Rate Limit Middleware"]
            RL --> AUTH["Auth Middleware"]
        end

        GR --> Middleware

        Middleware --> SP["Service Proxies"]
        Middleware --> DH["Direct Handlers"]

        SP --> US["Users Service"]
        SP --> PS["Products Service"]
        SP --> OS["Orders Service"]

        DH --> HC["Health Check"]
        DH --> ME["Metrics"]
    end

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Gateway Request Flow

This shows how a request flows through the gateway to backend services.

graph LR
    CR["Client Request"] --> GR["Gateway Router"]
    GR --> MS["Middleware Stack"]
    MS --> SP["Service Proxy"]
    SP --> BS["Backend Service"]

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Available Routes

Public Endpoints

Method	Endpoint	Description
GET	/health	Health check
GET	/metrics	Metrics (auth protected)

Protected Service Endpoints

Method	Endpoint	Description
GET/POST	/api/users	User service
GET/POST	/api/products	Product service
GET/POST	/api/orders	Order service