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By being so flexible and adaptable, REST provides developers with an elegant framework to build client-server applications. More than anything else, the thing you can expect from a REST architecture is flexibility. REST will continue to provide developers access to a wide variety of publicly available APIs accessing a huge amount of data. REST is important because it represents the future of the Internet. REST is used for APIs that do not need to adhere to the older SOAP protocol utilized by many legacy systems. REST is used by developers who wish to build mobile apps or user interfaces to interact with public APIs such as Google Maps and those listed on sites such as GitHub. GET retrieves specific resources or a collection of resources.ĭELETE removes a specific resource by ID. There are four HTTP verbs used to request resources in a REST system: The client is a user interface that requests and displays the information requested by the end-user. This is because the client is simply the interface that initiates the REST API, which is actually the component that goes out and does the heavy lifting. Most of the documentation out there focuses on how REST APIs work rather than the client. It is able to create code on-demand to meet the needs of the application, even if the application is running.This means that if a load balancer or proxy is placed between the client and server, it will not impact their communications, and there will not be a need to update the client or server code.
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A client cannot typically tell whether it is connected directly to the server or to an intermediary. The constraints for this uniform interface are resource identification in requests, resource manipulation through representations, self-descriptive messages, and hypermedia as the engine of application state (HATEOAS). This simplifies and decouples the architecture, which allows components to evolve independently. Caching partially or completely eliminates some client-server interactions, thus improving scalability and performance. Responses must, either implicitly or explicitly, define themselves as either cacheable or non-cacheable to prevent clients from providing stale data in response to further requests. On the World Wide Web, clients can cache responses. Application state, or extrinsic state, consists of data stored on each client that is dependent on the server’s context. The resource state, or intrinsic state, is stored on the server. The state consists both of intrinsic state and extrinsic state. This separation enables the components to evolve independently. It improves scalability through simplification of the server components. Separating the UI from the data storage improves the portability of the UI across platforms. Related: Best API Clients The Characteristics of RESTĪ REST architecture has the following constraints: The three components are the client application, the APIs, which ferry information back and forth between the client application and the web server, and the server upon which the data resides.
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What is a REST Client?Ī REpresentational State Transfer client is one of three components of the REST client-server web application architecture. It will explain their definitions, REST characteristics, how they work, who uses them, why they are important, what you can expect from them, some examples of their use, their benefits, and how they compare to other data methods retrieval. This article will examine REST, or REpresentational State Transfer, clients.