metadata source link, alternates, vary control data if-modified-since, cache-control Resources. 5.1.5 Uniform Interface, the central feature that distinguishes the rest architectural style from other network-based styles is its emphasis on a uniform interface between components figure 5-6 ). Later sections will describe in more detail the specific constraints that compose the rest style. The rest style draws from many preexisting distributed process paradigms 6, 50, communication dissertation discussion protocols, and software fields. A component can override these defaults by including control data that marks the interaction as cacheable, non-cacheable or cacheable for only a limited time. Cache constraints require that the data within a response to a request be implicitly or explicitly labeled as cacheable or non-cacheable. Retrieved Further reading edit Pautasso, Cesare; Wilde, Erik; Alarcon, Rosa (2014 rest: Advanced Research Topics and Practical Applications Pautasso, Cesare; Zimmermann, Olaf; Leymann, Frank (April 2008 "restful Web Services. These constraints will be discussed in Section.2. "Chapter 2: Network-based Application Architectures". Rest concentrates all of the control state into the representations received in response to interactions. Client connectors examine the resource identifier in order to select an appropriate communication mechanism for each request.
Representational State Transfer rEST ) is an architectural style that defines a set of constraints to be used for creating web services.
Web services that conform to the.
Rest architectural style, or restful web services, provide interoperability between computer systems on the Internet.
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The current representation tells the client how to compose requests for transitions to all the next available application states. The only reason it is modeled as part of rest and not abstracted away as part of the network infrastructure is that some rest components may dynamically switch from active component behavior to that of a tunnel. Table 5-2: rest Connectors Connector Modern Web Examples client libwww, libwww-perl server libwww, Apache API, nsapi cache browser cache, Akamai cache network resolver bind (DNS lookup library) tunnel socks, SSL after http connect All rest interactions are stateless. The four constraints for this uniform interface are: Resource identification in requests Individual resources are identified in requests, for example using URIs in Web-based rest systems. The stateless nature of rest allows each interaction to be independent of the others, removing the need for an awareness of the overall premise of a research paper component topology, an impossible task for an Internet-scale architecture, and allowing components to act as either destinations or intermediaries, determined dynamically. Figure 5-10 provides a sample of the process view from a rest-based architecture at a particular instance during the processing of three parallel requests. A b H, Jeremy. The Representational State Transfer (rest) style is an abstraction of the architectural elements within a distributed hypermedia system. 2 Statelessness edit See also: Stateless protocol The clientserver communication is constrained by no client context being stored on the server between requests.
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