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POST is therefore suitable for requests which change the state each time they are performed, for example submitting a comment to a blog post or voting in an online poll. GET is defined to be nullipotent , with no side-effects, and idempotent operations have "no side effects on second or future requests".
The HTTP/1.0 specification [49] defined the GET, HEAD, and POST methods as well as listing the PUT, DELETE, LINK and UNLINK methods under additional methods. However, the HTTP/1.1 specification [50] formally defined and added five new methods: PUT, DELETE, CONNECT, OPTIONS, and TRACE. Any client can use any method and the server can be ...
GET: Get the resource (a collection of entities, a single entity, a structural property, a navigation property, a stream, etc.). POST: Create a new resource. PUT: Update an existing resource by replacing it with a complete instance. PATCH: Update an existing resource by replacing part of its properties with a partial instance.
Idempotence (UK: / ˌ ɪ d ɛ m ˈ p oʊ t ən s /, [1] US: / ˈ aɪ d ə m-/) [2] is the property of certain operations in mathematics and computer science whereby they can be applied multiple times without changing the result beyond the initial application.
Diagram of a double POST problem encountered in user agents. Diagram of the double POST problem above being solved by PRG. Post/Redirect/Get (PRG) is a web development design pattern that lets the page shown after a form submission be reloaded, shared, or bookmarked without ill effects, such as submitting the form another time.
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In computer programming, create, read, update, and delete (CRUD) are the four basic operations (actions) of persistent storage. [1] CRUD is also sometimes used to describe user interface conventions that facilitate viewing, searching, and changing information using computer-based forms and reports .
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