What is transmitted when using the HTTP method?

When using any HTTP method, the following main components are transmitted:

• Request Line:
  • HTTP Method (GET, POST, PUT, DELETE, and shadow methods HEAD, OPTIONS, PATCH, TRACE).
  • Resource path (URL).
  • HTTP protocol version (e.g., HTTP/1.1, HTTP/2).
• Headers:
  • Additional information about the request, client, or expected response. Examples: Host, User-Agent, Content-Type, Accept.
• Empty line:
  • Separates headers and request body.
• Request Body (optional):
  • Contains data sent to the server (e.g., form data, JSON, XML). Present in POST, PUT, PATCH methods. Absent in GET, HEAD, DELETE (although HTTP specification allows a body in DELETE, in practice it is rarely used and often ignored by servers).