What exactly is an HTTP Entity?

Question

Would someone please describe to me what exactly an HTTP entity is?

I am reading the HTTPClient documentation, but I do not really understand what t

Answer 1

Among the good answers that we have here, I believe that is worth to mention something that comes directly from the RFC 2616 (Hypertext Transfer Protocol - HTTP/1.1):

Entity

Request and Response messages MAY transfer an entity if not otherwise restricted by the request method or response status code. An entity consists of entity-header fields and an entity-body, although some responses will only include the entity-headers.

In a a nutshell: an Entity may be transferred, and it can be the header + body, or just the header.

Since that there's the link above, I detain myself on making additional comments.