Dororo

An asynchronous backend sandbox built to master production-grade web services in Rust.

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Core Learning Takeaways

• Thread-Safe State & Static Keys: Sharing DB pools via Arc<AppState> and lazy initializing crypto keys with std::sync::LazyLock.
• Type-Safe Extraction & RBAC: Extracting Bearer tokens via TypedHeader into Claims paired with role-matching middleware (require_role).
• Socketless Integration Testing: Testing the HTTP pipeline in-memory via tower::Service (oneshot/call) using an ephemeral sqlite::memory: database.
• Defensive Traffic Control: Layering Tower middleware for global rate-limiting (GovernorLayer), timeouts (TimeoutLayer), and concurrency limits.
• Declarative Payload Validation: Binding the validator crate to deserialization pipelines to sanitize input data before hitting domain logic.

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API Endpoints

Global Middleware

• Rate Limiting: GovernorLayer (2 req/sec, burst 5) via client IP.
• Timeouts: TimeoutLayer (10-second limit).
• Observability: TraceLayer structured metrics.

Routes Matrix

Method	Endpoint	Description	Extractors / Middleware
GET	/	Root Index	None
GET	/pages	Query-driven list pagination	Query<Pagination>
POST	/login	Authenticate and issue JWT	Json<AuthPayload>
GET	/users/	User section about	Concurrency Limited (Max 5)
POST	/users/create	Validate and insert new user	Json<CreateUser> + Concurrency Limited
PATCH	/users/update/{id}	Update user profile	JWT (Claims) + Path<u64> + Json<UpdateUser> + Concurrency Limited
DELETE	/users/delete/{id}	Remove a user by ID	JWT (Claims) + Path<u64> + Concurrency Limited
GET	/users/greet/{name}	Dynamic path injection	Path<String> + Concurrency Limited
GET	/admin/list	Fetch all users	JWT (Claims) + Query<Pagination> + Admin Role
PATCH	/admin/{id}/role	Modify user role level	JWT (Claims) + Path<u64> + Json<ChangeRolePayload> + Admin Role
ANY	/assets/*	Static asset / SPA fallback	ServeDir / ServeFile ("public")

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Getting Started

1. Setup Environment

JWT_SECRET=your_super_secret_key_here

2. Run the Server

# Automatically builds SQLite schema and listens at http://localhost:3000
cargo run

3. Run Test

cargo test