HTTP/1.1

Http1.1最初定义在Hypertext Transfer Protocol -- HTTP/1.1中，后面被Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing废除，因此当前HTTP1.1协议实际上包括：

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