Rate-Limit FastAPI Endpoints with SlowAPI
Rate-Limit FastAPI Endpoints with SlowAPI. FastAPI endpoints can be rate-limited by integrating the slowapi library. Let's see slowapi in action
Fastapi Articles
55 articles
How a FastAPI Request Flows from HTTP to Response
FastAPI doesn't just magically turn your Python code into a web API; it orchestrates a series of well-defined steps that transform an incoming HTTP requ.
How FastAPI Validates Request Data with Pydantic Internally
The most surprising thing about FastAPI's Pydantic validation is that it's not just about catching errors; it's actively shaping your data into the exac.
Optimize FastAPI Response Serialization with Response Models
FastAPI's responsemodel is often treated as just a schema validator, but its real power lies in its ability to transform and optimize your data before i.
Implement Role-Based Access Control in FastAPI
FastAPI's role-based access control RBAC isn't just about checking a user's role; it's fundamentally about defining what actions a user can perform base.
Organize FastAPI Routes with Router Prefixes and Tags
FastAPI's APIRouter is a powerful tool for organizing your application, but its true potential for clarity and maintainability is unlocked when you leve.
Harden FastAPI APIs: Security Checklist for Production
Harden FastAPI APIs: Security Checklist for Production — practical guide covering fastapi setup, configuration, and troubleshooting with real-world exam...
Speed Up FastAPI JSON Serialization with orjson
orjson can make your FastAPI API blaze by replacing Python's built-in json module with a much faster, Rust-based alternative for JSON serialization.
Stream Real-Time Data from FastAPI with Server-Sent Events
Server-Sent Events SSE are often misunderstood as just a way to "push" data, but their real magic is how they fundamentally simplify state synchronizati.
Load FastAPI App Settings from Environment Variables with Pydantic
FastAPI applications can dynamically configure themselves based on environment variables, allowing for flexible deployments without code changes.
Override FastAPI Dependencies in Tests with Mocks
FastAPI dependencies are surprisingly easy to override in tests, letting you swap out live services for predictable mocks without changing your applicat.
Test FastAPI Routes with TestClient and HTTPX
FastAPI's TestClient is built on top of httpx, which means you can test your FastAPI application as if you were making actual HTTP requests, but without.
Optimize FastAPI Type Annotation Performance for Hot Paths
FastAPI's type annotations, while a boon for developer experience and correctness, can become a surprising bottleneck in your application's hottest code.
FastAPI vs Django REST Framework: Choose the Right Python API
FastAPI is designed to be significantly faster than Django REST Framework because it's built on modern Python features like type hints and asynchronous .
FastAPI vs Flask: Pick the Right Python Framework for Production
FastAPI is a web framework that's often praised for its speed, but its real superpower is how it forces you to build robust, self-documenting APIs from .
Fix FastAPI Warning: uvicorn Not Installed
The uvicorn server process is failing to start because the necessary Python package, uvicorn, is not present in your current Python environment.
Deploy FastAPI with Zero Downtime Using Rolling Updates
FastAPI applications can be updated with zero downtime by leveraging a technique called rolling updates, which involves gradually replacing old instance.
Fix FastAPI Pydantic Error: orm_mode Must Be Enabled
The ormmode must be enabled in Pydantic models when you're trying to use them to represent ORM objects directly, and the error means your Pydantic model.
Fix FastAPI PassLib UnknownHashError in Password Hashing
The UnknownHashError in Passlib means that the hashing algorithm specified in your user's stored password hash is not recognized by the current version .
Fix FastAPI Response Model Field Mismatch Validation Errors
The responsemodel validation in FastAPI is failing because the data being returned by your endpoint doesn't match the structure or types defined in the .
Fix SQLAlchemy DetachedInstanceError in FastAPI Async Routes
The DetachedInstanceError in SQLAlchemy, when encountered within FastAPI async routes, means a database session that was previously associated with an o.
Fix SQLAlchemy ProgrammingError in FastAPI Database Queries
SQLAlchemy's ProgrammingError in a FastAPI application means your database driver like psycopg2 for PostgreSQL is reporting an issue with the SQL query .
Fix FastAPI CORS Error: allow_origins Must Be a List
Your FastAPI application is failing because the alloworigins parameter in your CORS configuration isn't formatted as a Python list.
Fix FastAPI Dependency Injection Not Matching Expected Types
FastAPI's dependency injection system is failing because it's unable to resolve a dependency to the expected type, leading to runtime errors.
Version FastAPI Routes with URL Prefixes and Header-Based Routing
FastAPI's routing system is designed for flexibility, but when you need to serve different versions of your API under the same base URL, it can feel lik.
How FastAPI Async Request Handling Works with Starlette
FastAPI's asynchronous request handling, while appearing magical, is fundamentally a well-orchestrated dance between Python's async/await keywords and S.
Implement JWT Authentication in FastAPI with OAuth2 Password Flow
JWT authentication in FastAPI using OAuth2 Password Flow is fundamentally about securely delegating access to your API resources without clients needing.
FastAPI Background Tasks vs Celery: When to Use Each
FastAPI's BackgroundTasks are an excellent way to offload simple, short-lived operations from your main request-response cycle without introducing exter.
Run Background Jobs in FastAPI with ARQ and Redis
FastAPI's built-in support for background tasks is surprisingly limited, often leading developers to seek more robust solutions like ARQ for managing lo.
Benchmark FastAPI Performance with wrk and Locust
Benchmark FastAPI Performance with wrk and Locust — FastAPI is designed for speed, but how fast is it really? Let's find out by benchmarking its perform.
Cache FastAPI Responses in Redis with aiocache
FastAPI's responsecache decorator, powered by aiocache, lets you keep frequently accessed data out of your database and application logic, serving it di.
Connect FastAPI to Postgres Asynchronously with asyncpg Pool
Connect FastAPI to Postgres Asynchronously with asyncpg Pool — practical guide covering fastapi setup, configuration, and troubleshooting with real-worl...
Configure FastAPI CORS for Production APIs
FastAPI's CORS middleware is surprisingly simple to configure, but the devil is in the details when it comes to production readiness.
Customize the FastAPI OpenAPI Schema for Branding and Docs
FastAPI's OpenAPI schema is generated by default to be functional, not pretty, but you can inject custom branding and details to make your API documenta.
Use Async SQLAlchemy with FastAPI for Non-Blocking DB Queries
SQLAlchemy's async support doesn't actually make your database queries run faster, it just stops your web server from waiting for them.
FastAPI Dependency Injection Explained: How It Works Under the Hood
FastAPI's dependency injection system is so powerful because it lets you treat your application's configuration and dependencies as first-class citizens.
Containerize FastAPI with Docker and Uvicorn for Production
FastAPI applications can serve production traffic directly from a container, bypassing the need for external WSGI/ASGI servers like Gunicorn or Uvicorn.
Connect FastAPI to Kafka for Event-Driven Microservices
FastAPI can't directly "connect" to Kafka in the way a database driver connects to a database; instead, it acts as a producer or consumer of Kafka messa.
Upload and Stream Files in FastAPI
FastAPI can stream files directly to the client without ever touching disk, which is a surprisingly efficient way to serve large assets.
Add GraphQL to FastAPI with Strawberry
Strawberry is a Python library that lets you build GraphQL APIs using Python type hints. It integrates seamlessly with FastAPI, allowing you to combine .
Serve gRPC Endpoints Alongside FastAPI REST Routes
FastAPI can serve gRPC endpoints alongside its RESTful routes, but it requires a bit of explicit setup to bridge the two worlds.
Secure FastAPI with Strict Header and Cookie Policies
FastAPI applications can be secured by enforcing strict policies on incoming request headers and cookies, preventing common attack vectors like Cross-Si.
Add Health and Readiness Endpoints to FastAPI for Kubernetes
FastAPI applications, when deployed to Kubernetes, often need to expose health and readiness endpoints so the orchestrator can properly manage their lif.
Senior FastAPI Interview Questions and Answers
FastAPI's dependency injection system is actually a powerful form of explicit, runtime-checked inversion of control, not just a convenience for passing .
Horizontally Scale FastAPI on Kubernetes with HPA
Horizontal Pod Autoscaler HPA lets your FastAPI application on Kubernetes automatically adjust the number of running pods based on observed metrics, ens.
Manage FastAPI Startup and Shutdown with Lifespan Context
FastAPI's lifespan context is surprisingly a lot like a tiny, embedded event loop running outside of your main request handling.
Structure FastAPI Logs with structlog for Production
Structure FastAPI Logs with structlog for Production — FastAPI logs, by default, are just strings. Structlog transforms them into structured data, makin...
Control FastAPI Middleware Execution Order
The order in which FastAPI middleware runs is determined by how you add them, with the last one added executing first for incoming requests and last for.
Organize FastAPI Services in a Monorepo
A monorepo for FastAPI services is less about code organization and more about managing dependencies and deployment pipelines as a single, cohesive unit.
Build Multi-Tenant FastAPI Apps with Schema Isolation
You can run multiple tenants in a single FastAPI application, each with its own isolated database schema, without needing separate deployments or even s.
Customize FastAPI OpenAPI Docs with Tags, Metadata, and Schemas
FastAPI's OpenAPI documentation is generated automatically, but the real power comes when you customize it to reflect your API's structure and intent.
Instrument FastAPI with OpenTelemetry for Distributed Tracing
FastAPI applications don't inherently know how to tell other services they're talking to that they're part of the same request.
Paginate FastAPI Results with Cursor-Based and Offset Strategies
FastAPI's pagination isn't just about slicing data; it's about managing the state of your entire dataset across requests.
Profile FastAPI Performance with Pyinstrument to Find Slow Paths
FastAPI's asynchronous nature can mask performance bottlenecks, making it look like everything is fast until it suddenly isn't.
Speed Up FastAPI Validation with Pydantic v2
Pydantic v2's validation speed is actually slower than v1 for simple, common cases, but its underlying Rust core unlocks massive performance gains for c.