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Rest Introduction and Architecure

Category: Technology & Written by Francesco Malagrino On December-17-2021 19:03:47

What is Rest?


The Rest Stands for  Representational State Transfer


Representational means format : such as XML , JSON, YAML, HTML etc.


State means Data


Transfer means carry data between consumer and provider using the HTTP  protocol


In the following picture a typical Rest Architecture


 



As you can see something called Rest API :


What is a REST API?


API Stand for Application Programming Interface.


A REST API is an intermediary API  that enable two application comunicate with each other over HTTP, much more like the servers communicate to Browser


Now the API that has the following constraints is know as RESTful API


Client-server Architecture : The client is the front-end the server is the back end of the service.


It is important to note that both of these entities are independent of each other.


Stateless : No data should be store on the server durng the processing of the request transfer. The state of the session should be saved at the clients end.


Cacheble : The client should have the ability to store responses in cache. This greatly improves the performance of the API:


Uniform Interface : this constraiint indicates a generic interface to manage all the interfaction between the client and the server in a unified way, which simplifies and decouples the arhitecture


Layered System : The server can have multiple layers for implementation. This layered architecture helps to improve scalability by enabling load balancing.


Code on Demand : This constraint is optional. This constraint indicates that the functionality of the client applications can be extended at runtime by allowing a code download from the server and execturing the code


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