Какие существуют виды заголовков в HTTP?

There are four main types of headers in HTTP:

• General Headers: Apply to both request and response messages but not to the content. Examples: Cache-Control, Connection, Date.

• Request Headers: Contain information about the client sending the request and the resource being requested. Examples: User-Agent, Accept, Referer.

• Response Headers: Contain information about the server and the resource returned. Examples: Server, Set-Cookie, Content-Type.

• Entity Headers: Relate to the content (body) of the message, in both request and response. Examples: Content-Length, Content-Type, Content-Encoding.