# http

# RFC HTTP

• RFC2616 - Hypertext Transfer Protocol -- HTTP/1.1
• RFC7230 – HTTP/1.1: Message Syntax and Routing
• RFC7231 – HTTP/1.1: Semantics and Content
• RFC7232 – HTTP/1.1: Conditional Requests
• RFC7233 – HTTP/1.1: Range Requests
• RFC7234 – HTTP/1.1: Caching
• RFC7235 – HTTP/1.1: Authentication

# long polling

What is HTTP Long Polling? - www.pubnub.com/blog - 20141201

• The client polls the server requesting new information.
• The server holds the request open until new data is available.
• Once available, the server responds and sends the new information.
• When the client receives the new information, it immediately sends another request, and the operation is repeated.

This effectively emulates a server push feature.