http

HTTP

hypertext transfer protocol

HTTP methods

• GET: fetch a resource
• PUT: create or replace a resource
• POST: create a new resource only (fails if the resource exists)
• PATCH: partial update of a resource
• DELETE: destroy a resource
• OPTIONS: show what methods are available for a resource
• HEAD: just fetch the headers for a resource

Q: What's the difference between PUT and POST

A: PUT is idempotent. POST is not.

Stuff that is not HTTP

• ftp
• gopher
• gemini

CLI Clients

• http://http-prompt.com/
• https://httpie.org/
• curl

Status Codes

• https://http.cat/

1. Informational responses (100–199)
2. Successful responses (200–299)
3. Redirects (300–399)
4. Client errors (400–499)
5. Server errors (500–599)

• https://developer.mozilla.org/en-US/docs/Web/HTTP/Status

Testing APIs

• https://github.com/liyasthomas/postwoman - an open source postman clone

Other

• httpbin.org - A simple HTTP Request & Response Service.