request processing via middleware components and hooks Strict adherence to RFCs Idiomatic HTTP error responses Straightforward exception handling Snappy testing with WSGI/ASGI helpers and mocks CPython 3 Introducing Hooks Error Handling What Now? Tutorial (ASGI) First Steps Hosting Our App Configuration Image Store Images Resource(s) Running Our Application Dynamic Thumbnails Caching Responses Testing Our Capitalizing Response Header Names Parsing Nested Multipart Forms Outputting CSV Files Prettifying JSON Responses Decoding Raw URL Path Request ID Logging FAQ Design Philosophy Performance Routing Extensibility

request processing via middleware components and hooks Strict adherence to RFCs Idiomatic HTTP error responses Straightforward exception handling Snappy testing with WSGI/ASGI helpers and mocks CPython 3 Introducing Hooks Error Handling What Now? Tutorial (ASGI) First Steps Hosting Our App Configuration Image Store Images Resource(s) Running Our Application Dynamic Thumbnails Caching Responses Testing Our Capitalizing Response Header Names Parsing Nested Multipart Forms Outputting CSV Files Prettifying JSON Responses Decoding Raw URL Path Request ID Logging FAQ Design Philosophy Performance Routing Extensibility

request processing via middleware components and hooks Strict adherence to RFCs Idiomatic HTTP error responses Straightforward exception handling Snappy testing with WSGI/ASGI helpers and mocks CPython 3 Introducing Hooks Error Handling What Now? Tutorial (ASGI) First Steps Hosting Our App Configuration Image Store Images Resource(s) Running Our Application Dynamic Thumbnails Caching Responses Testing Our Capitalizing Response Header Names Parsing Nested Multipart Forms Outputting CSV Files Prettifying JSON Responses Decoding Raw URL Path Request ID Logging FAQ Design Philosophy Performance Routing Extensibility

request processing via middleware components and hooks Strict adherence to RFCs Idiomatic HTTP error responses Straightforward exception handling Snappy testing with WSGI/ASGI helpers and mocks CPython 3 Introducing Hooks Error Handling What Now? Tutorial (ASGI) First Steps Hosting Our App Configuration Image Store Images Resource(s) Running Our Application Dynamic Thumbnails Caching Responses Testing Our Capitalizing Response Header Names Parsing Nested Multipart Forms Outputting CSV Files Prettifying JSON Responses Decoding Raw URL Path Request ID Logging FAQ Design Philosophy Performance Routing Extensibility

request processing via middleware components and hooks Strict adherence to RFCs Idiomatic HTTP error responses Straightforward exception handling Snappy testing with WSGI/ASGI helpers and mocks CPython 3 Introducing Hooks Error Handling What Now? Tutorial (ASGI) First Steps Hosting Our App Configuration Image Store Images Resource(s) Running Our Application Dynamic Thumbnails Caching Responses Testing Our Capitalizing Response Header Names Parsing Nested Multipart Forms Outputting CSV Files Prettifying JSON Responses Decoding Raw URL Path Request ID Logging FAQ Design Philosophy Performance Routing Extensibility

request processing via middleware components and hooks Strict adherence to RFCs Idiomatic HTTP error responses Straightforward exception handling Snappy testing with WSGI/ASGI helpers and mocks CPython 3 Introducing Hooks Error Handling What Now? Tutorial (ASGI) First Steps Hosting Our App Configuration Image Store Images Resource(s) Running Our Application Dynamic Thumbnails Caching Responses Testing Our Capitalizing Response Header Names Parsing Nested Multipart Forms Outputting CSV Files Prettifying JSON Responses Decoding Raw URL Path Request ID Logging FAQ Design Philosophy Performance Routing Extensibility

Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 5.4.6 Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 5 processing via middleware components and hooks • Strict adherence to RFCs • Idiomatic HTTP error responses • Straightforward exception handling • Snappy testing with WSGI/ASGI helpers and mocks • CPython processing via middleware components and hooks • Strict adherence to RFCs • Idiomatic HTTP error responses • Straightforward exception handling • Snappy testing with WSGI/ASGI helpers and mocks • CPython

Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 5.4.6 Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 5 processing via middleware components and hooks • Strict adherence to RFCs • Idiomatic HTTP error responses • Straightforward exception handling • Snappy testing with WSGI/ASGI helpers and mocks • CPython processing via middleware components and hooks • Strict adherence to RFCs • Idiomatic HTTP error responses • Straightforward exception handling • Snappy testing with WSGI/ASGI helpers and mocks • CPython

Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 5.4.6 Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 5 REST-inspired mapping of URIs to resources • Global, resource, and method hooks • Idiomatic HTTP error responses • Full Unicode support • Intuitive request and response objects • Works great with async libraries response classes • DRY request processing via middleware components and hooks • Idiomatic HTTP error responses • Straightforward exception handling • Snappy testing through WSGI/ASGI helpers and mocks

Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182 5.4.6 Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 5 REST-inspired mapping of URIs to resources • Global, resource, and method hooks • Idiomatic HTTP error responses • Full Unicode support • Intuitive request and response objects • Works great with async libraries response classes • DRY request processing via middleware components and hooks • Idiomatic HTTP error responses • Straightforward exception handling • Snappy testing through WSGI/ASGI helpers and mocks