Can you name the components that are part of the HTTP request structure?

An HTTP request consists of several main components:

1. Request Line — contains the method (GET, POST, etc.), URI (resource path), and HTTP protocol version.

2. Headers — key-value pairs that convey additional information about the request, such as content type, authorization, cookies, etc.

3. Body — an optional part used to transmit data (for example, in POST or PUT requests).

Example of an HTTP request:

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

{"username":"user","password":"pass"}

In iOS, creating HTTP requests typically involves using the URLRequest class, where all these components can be set.