http

For engineers working without a browser who need to call APIs and download with resumable transfers — covering GET/POST requests, headers & cookies, resumable download, proxy auth, and debugging with both curl and wget, plus a side-by-side comparison so you pick the right tool per task.

HTTP methods and REST semantics: GET/POST/PUT/PATCH/DELETE verbs, idempotency, safe methods, status-code pairing and common misuses. For choosing the right verb when designing APIs so retries and concurrency behave predictably. Pairs with the HTTP Status Codes sheet.

A curl request and troubleshooting handbook for backend developers, testers, and ops, covering GET/POST request bodies, -v/-I/-w request details and timing analysis, -k/-x TLS and proxies, -u/-F/-o auth and upload, plus practical combinations of cookies, redirects, and timeout retries.

Every HTTP response status code from 1xx to 5xx with its meaning, common cause and a debugging hint. Built for backend/frontend developers and Nginx/gateway ops to pinpoint why an API misbehaves — distinguishing 4xx from 5xx and checking whether redirects behave as expected.

Common MIME types / Content-Type values mapped to file extensions, covering text, image, audio, video, application data, documents, archives and fonts, including charset hints. For correctly returning and validating Content-Type in HTTP responses and uploads.

RESTful API design conventions covering URL naming, HTTP method selection, status-code choice, request headers and response formats, auth options and best practices. For designing consistent, debuggable web APIs.

An HTTPie reference: GET/POST requests, automatic JSON formatting, form and file uploads, authentication, and http/s sessions for everyday API testing.