This is the latest accepted revision, reviewed on rest dissertation February 2019.
Web resources» were first defined on the World Wide Web as documents or files identified by their URLs. However, today they have a much more generic and abstract definition that encompasses every thing or entity that can be identified, named, addressed, or handled, in any way whatsoever, on the Web. By using a stateless protocol and standard operations, RESTful systems aim for fast performance, reliability, and the ability to grow, by re-using components that can be managed and updated without affecting the system as a whole, even while it is running. The term representational state transfer was introduced and defined in 2000 by Roy Fielding in his doctoral dissertation. Roy Fielding speaking at OSCON 2008. Roy Fielding defined REST in his 2000 PhD dissertation «Architectural Styles and the Design of Network-based Software Architectures» at UC Irvine.
Throughout the HTTP standardization process, I was called on to defend the design choices of the Web. That is an extremely difficult thing to do within a process that accepts proposals from anyone on a topic that was rapidly becoming the center of an entire industry. Six guiding constraints define a RESTful system. Separating the user interface concerns from the data storage concerns improves the portability of the user interface across multiple platforms. Perhaps most significant to the Web, however, is that the separation allows the components to evolve independently, thus supporting the Internet-scale requirement of multiple organizational domains.
Rest dissertation from any client contains all the information necessary to service the request, and session state is held in the client. The client begins sending requests when it is ready to make the transition to a new state. As on the World Wide Web, clients and intermediaries can cache responses. Responses must therefore, implicitly or explicitly, define themselves as cacheable or not to prevent clients from getting stale or inappropriate data in response to further requests.
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They can also enforce security policies. The uniform interface constraint is fundamental to the design of any RESTful system. It simplifies and decouples the architecture, which enables each part to evolve independently. Resource identification in requests Individual resources are identified in requests, for example using URIs in RESTful Web services.
The resources themselves are conceptually separate from the representations that are returned to the client. Web service APIs that adhere to the REST architectural constraints are called RESTful APIs. The current representation tells the client how to compose requests for transitions to all the next available application states. This could be as simple as a URI or as complex as a Java applet. Retrieve the URIs of the member resources of the collection resource in the response body. Create a member resource in the collection resource using the instructions in the request body. The URI of the created member resource is automatically assigned and returned in the response Location header field.
Replace all the representations of the member resources of the collection resource with the representation in the request body, or create the collection resource if it does not exist. Update all the representations of the member resources of the collection resource using the instructions in the request body, or may create the collection resource if it does not exist. Delete all the representations of the member resources of the collection resource. Create a member resource in the member resource using the instructions in the request body. Replace all the representations of the member resource, or create the member resource if it does not exist, with the representation in the request body. Update all the representations of the member resource, or may create the member resource if it does not exist, using the instructions in the request body. Delete all the representations of the member resource.
Unlike SOAP-based Web services, there is no «official» standard for RESTful Web APIs. This is because REST is an architectural style, while SOAP is a protocol. 3 Relationship to the World Wide Web and REST Architectures. Fielding discussing the definition of the REST term». Fielding discusses the development of the REST style».
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