The HTTP protocol in restful

Tag: Option network query server app body Request Understanding Update

RESTful is a resource-based software architecture style.

The so-called resources, is an entity on the network, or is a specific information on the network. A picture, a song is a resource.

The RESTful API is an implementation based on the HTTP protocol. (HTTP is an application-level protocol that is characterized by simplicity and speed).

HTTP protocol--Request

Composition format: Request line, message header, request body

Format: Method Request-uri http-version CRLF

eg:get/http/1.1 CRLF

Request Method:

Get: Request for the resource identified by Request-uri

"Post: Append new data after Request-uri identified resources

"HEAD: Request for a response message header for a resource identified by Request-uri

Put: Update resources are often used to request that the server store a resource and use Request-uri as its identity

Delete: The request server deletes the resource identified by the Request-uri

Options: Request performance from a query server or query for resource-related options and requirements

HTTP protocol--response

Composition format: status line, message header, response body

eg:http/1.1 OK

Common status Code

$ OK//client request succeeded

Bad Request//client requests have syntax errors and cannot be understood by the server

401 Unauthorized//server receives request, but refuses to provide service

404 Not Found//request resource does not exist

Internal Server error//server unexpected errors

503 Server Unavailable//server is currently unable to process client requests

The HTTP protocol in restful