What is a REST API?

What is REST API Design, what is rest api, what is rest api in c#, what is rest api web service, what is rest api and why we use it


In the web world, it is sometimes necessary for us to find a structured yet tremendously flexible way to leverage the existing web protocols without any compromise on the standards and the existing features. This is the area where REST API comes handy as this magnificently designed architecture style has a lot of abilities to take advantage of all the protocols and REST API is the de-facto choice for those enthusiastic developers who are keen to acquire the capability of performing multiple tasks such as handling calls which are of multiple types and different media type returns. In next topic, you'll learn how are important HTTP status codes in our application.
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After we have had dealt the topic: Learn HAP: HTML Writer using Agility Pack C#, the time has come for us to discuss in detail about what is REST API web service. Before we further proceed with what is rest API and why we use it, we assume that you have basic knowledge of web protocols.

What is a REST API

When should you need REST API?

REST API design is always helpful You are at an advantage by following REST API approach in your API design as you aren't the only one who is going to be a benefit with this but rather even your customers as well. There are various format supports such as YAML and JSON to list a few. The order is unimportant when it comes to REST for remembering the procedures or names of the parameters being sent. These two features are in contrast with the ones available with SOAP and RPC designs. If scalability is your concern, then REST is a quick and reliable choice.

Basic Guidelines for a better REST API design

To know What is REST API Design precisely it is important for you to understand what are all necessary for an API to be claimed as RESTful. Many of the APIs call themselves to be inline with REST design, yet they actually fail to fulfill the requirements. Therefore, the below walk-through will let you have good insight about what is rest API in c# as C# has been the choice of language for our development from the previous sessions.
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Independently Scalable Client and Server

An organization works more efficiently and reliably only when it is able to incorporate ideas into its coding logic quickly. In order that this should happen, one has to be ensured that any changes in the client side of the application should not need a similar level of changes in the server side and vice-versa. So, a few changes in data stored in a database should not necessitate the mobile site development. A RESTful API has to cater to this need and this feature has several beautiful uses of its own.

Consistent Interface

Since client and server are free to scale independent of each other, the API layer can be changed without any worries about the need for change in the server side and client side. The interface layout is uniform and is not at all concerned about the architectural designs on both sides. Thus, an API should be able to inculcate this ability so as to be called as RESTful.

Leverage Cache and remain Stateless

A REST API is always stateless which means that any of the call from the client to the server,  i.e. the request needs to be complete by itself and should not rather depend on the server state or a session. This pattern cuts down the unnecessary and overhead calls to the server which actually bring down the performance of an application when exists. The necessary data that can make this request as independent could be the user ID or anything such kind of information.
Since multiple calls to the server to know the subsequent actions have been restricted, it becomes inevitable for a RESTful API designer to rely on secured cache data. It gives you an advantage that you don't have overhead request calls to your server and adding to it, the calls would let you be not worried about server bandwidth as internal server storage would be an optimum.

Service through a layered approach

Dividing your application functionality into layers would enhance both your business logic as well as code logic. There could be layers such as application layer, business layer and data layer which have their own importance. A good thing with this approach is that issues can be tackled independently at the layers itself rather than reworking on the entire application. An API sticking to this rule is said to have had followed REST design.
These are the constraints that could allow an API to be claimed as REST API. Delving in deep about each of the points that were said above, this architectural pattern stresses more about performance enhancement through reduction of burden on the server.

Anjan kant

Outstanding journey in Microsoft Technologies (ASP.Net, C#, SQL Programming, WPF, Silverlight, WCF etc.), client side technologies AngularJS, KnockoutJS, Javascript, Ajax Calls, Json and Hybrid apps etc. I love to devote free time in writing, blogging, social networking and adventurous life

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