HTTP (HyperText Transfer Protocol) is the foundation of data communication on the web. Here's a concise guide:

Core Concepts 🧠

  • Stateless: Each request is independent; servers don't retain session info
  • Client-Server Model: Separation of concerns between clients and servers
  • Uniform Interface: Standardized methods (GET, POST, etc.) and status codes

Request Methods 📡

Method Purpose Example
GET Retrieve resource GET /index.html HTTP/1.1
POST Submit data POST /submit-form HTTP/1.1
PUT Update resource PUT /update-data HTTP/1.1
DELETE Remove resource DELETE /delete-item HTTP/1.1

Status Codes ⚠️

  • 200 OK ✅
  • 404 Not Found 🚫
  • 500 Internal Server Error ⚠️
  • 301 Moved Permanently 🔄

Header Fields 📝

  • Content-Type (e.g., text/html, application/json)
  • Accept (e.g., */*, text/xml)
  • User-Agent (browser information)
  • Cache-Control (caching directives)

For deeper exploration, check our HTTP Methods Guide or Status Code Reference.

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