基本概念：

  • The Hypertext Transfer Protocol (HTTP): an application protocol for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web.
  • Client-server model: a distributed application structure that partitions tasks or workloads between the providers of a resource or service, called servers, and service requesters, called clients.
  • Request–response (or request–reply): one of the basic methods computers use to communicate with each other, in which the first computer sends a request for some data and the second computer responds to the request.
  • REST (representational state transfer) is an architectural style used for web development.

Request Methods/Verbs（动词）：

  • GET: Send named resource from the server to the client. （获取）
  • POST: Send client data into a server gateway application.（创建）
  • PUT: Store data from client into a named server resource. (更新)
  • DELETE: Delete the named resource from a server. （删除）
  • HEAD: Send just the HTTP headers from the response for the named resource.
  • OPTIONS
  • TRACE
  • CONNECT

Headers（头）

HTTP header fields are components of the header section of request and response messages in the Hypertext Transfer Protocol (HTTP).

  • standard header fields
  • non-standard header fields: prefixing the field name with X-

Status Code（状态码）

  • 1xx Informational
  • 2xx Success
  • 3xx Redirection
  • 4xx Client Error
  • 5xx Server Error

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