What are the main components of an HTTP request?

The main components of an HTTP request include:

1. Request line — contains the request method (GET, POST, PUT, DELETE, etc.), URL (resource path), and HTTP version.
2. Headers — a set of key-value pairs that convey additional information about the request, such as content type, authorization, cookies, etc.
3. Body — an optional part that contains data sent to the server, such as in POST or PUT requests.

Example of request line and headers:

POST /api/users HTTP/1.1
Host: example.com
Content-Type: application/json
Authorization: Bearer token

{"name": "John", "age": 30}

Thus, the structure of an HTTP request consists of the request line, headers, and optionally a body.