Request Validation & Models
Date Range Validator Model
Nested Order Validation Endpoint
User Registration Password Rules
Conditional Field Validation
Recursive Pydantic Tree Model
Sparse Fieldset Query Parameter
Routing & Parameters
Dynamic Status Code And Headers
Enum-Constrained Path Parameter
Modular Routers With include_router
Paginated List With Query Params
Regex-Validated Query Parameter
Serve Static File By Path
Validate A Constrained Tags List
Accept Header Content Negotiation
Cursor-Based Pagination Endpoint
Mount Versioned Sub-Application
Header-Based API Versioning
File Upload & Download
File Download Attachment Endpoint
Validated UploadFile Endpoint
Streaming Upload Size Guard
Dependencies Testing & Response Handling
Filter Sensitive Fields With response_model
Control Serialized Fields With response_model
Customize the OpenAPI Schema
Global Custom Exception Handler
Override DB Dependency in a Test
POST Integration Test Asserting 201
Simplify Validation Error Responses
Lifespan-Managed Heavy Resource
Auth & Security
Form-Based Login Endpoint
Restrictive CORS Configuration
Bearer Token Extraction Dependency
JWT Admin Scope Dependency
OAuth2 Password Flow With JWT
HMAC Request Signature Verification
Reusable RBAC Dependency Factory
Middleware & Cross Cutting
Request Logging Middleware
Correlation ID Middleware
Error-Only Request Logging Middleware
X-Process-Time Header Middleware
Idempotency-Key Enforcement Middleware
Per-IP Rate-Limiting Middleware
Background Tasks & Async Orchestration
Async Accept With 202 Response
Upload File With Background Processing
User Signup With Background Email
Concurrency-Limited Paginated API Fetch
Dependency Injection
Chained Sub-Dependencies With Depends
Class-Based Configurable Dependency
Header Version Threshold Dependency
Injectable Settings Dependency
X-API-Key Auth Dependency
Refactor Global State to DI
Websockets
Echo WebSocket With Graceful Disconnect
WebSocket Broadcast Connection Manager
WebSocket Heartbeat With Pong Timeout
Full Service Builds
ESG Data Ingestion Service
Multi-Worker URL Shortener
Privacy-Aware Visitor Analytics Backend
Llm & Ai Integration
ML Model Serving Predict Endpoint
Streaming & Server Sent Events
HTTP Range Video Streaming
SSE Progress Updates Endpoint
Stream Generated CSV In Chunks
Stream Large File Without Buffering