BaaS: The Mobile Backend is now a Service. In 1995, Clayton Christenson coined the term Disruptive Innovations in his article titled "Disruptive Technologies: Catching the Wave. " His contention was that some new products or services that appear in the marketplace are so revolutionary that they render existing technologies obsolete. We are seeing a new example of this phenomenon with the emergence of a sector being referred to as "Backend as a Service"—BaaS. BaaS is replacing the traditional server-side stack as a dependable, feature-rich option for powering mobile and web apps. Sidelining the competitionProponents of existing technologies may initially perceive new innovations to be no more than novelties, which is the power of the disruptive innovation! Why is a mobile backend as a service good for developers? From the developer’s perspective, BaaS cuts out the worst part of building mobile and web apps. And it means that we front-end developers don't have to get bogged down in all kinds of server side nonsense.
REST in WCF Blog Series Index | Demystifying The Code. Link Relations.
How to GET a Cup of Coffee. Persevere-framework - Google Code. Persevere is an open source set of tools for persistence and distributed computing using an intuitive standards-based JSON interfaces of HTTP REST, JSON-RPC, JSONPath, and REST Channels. The core of the Persevere project is the Persevere Server. The Persevere server includes a Persevere JavaScript client, but the standards-based interface is intended to be used with any framework or client. The Persevere Server is an object storage engine and application server (running on Java/Rhino) that provides persistent data storage of dynamic JSON data in an interactive server side JavaScript environment with the following key features: Persevere JavaScript Client is a persistent object mapping framework for JavaScript in the browser, which allows programmers to access, traverse, and manipulate persisted objects graphs easily with standard JavaScript syntax and intuitive Persistent JavaScript (PJS) API.
A Beginner’s Introduction to HTTP and REST. Hypertext Transfer Protocol (HTTP) is the life of the web. It's used every time you transfer a document, or make an AJAX request. But HTTP is surprisingly a relative unknown among some web developers. This introduction will demonstrate how the set of design principles, known as REST, underpin HTTP, and allow you to embrace its fullest power by building interfaces, which can be used from nearly any device or operating system. Republished Tutorial Every few weeks, we revisit some of our reader's favorite posts from throughout the history of the site. This tutorial was first published in November, 2010.
Why REST? REST is a simple way to organize interactions between independent systems. REST is a simple way to organize interactions between independent systems. The alternative is building relatively complex conventions on top of HTTP. After an initial overview, we'll examine each of the HTTP building blocks: URLs, HTTP verbs and response codes. HTTP messages are made of a header and a body. How I Explained REST to My Wife.
Architectural Styles and the Design of Network-based Software Architectures. REST Presentation. How I Explained REST to My Wife. HTTP/1.1: Header Field Definitions. This section defines the syntax and semantics of all standard HTTP/1.1 header fields. For entity-header fields, both sender and recipient refer to either the client or the server, depending on who sends and who receives the entity. 14.1 Accept The Accept request-header field can be used to specify certain media types which are acceptable for the response. Accept headers can be used to indicate that the request is specifically limited to a small set of desired types, as in the case of a request for an in-line image. Accept = "Accept" ":" #( media-range [ accept-params ] ) media-range = ( "*/*" | ( type "/" "*" ) | ( type "/" subtype ) ) *( ";" parameter ) accept-params = ";" "q" "=" qvalue *( accept-extension ) accept-extension = ";" token [ "=" ( token | quoted-string ) ] The asterisk "*" character is used to group media types into ranges, with "*/*" indicating all media types and "type/*" indicating all subtypes of that type.
The example Accept: audio/*; q=0.2, audio/basic 1. 2. 3. 4. 1. 2. MIME Media Types. HATEOAS. The HATEOAS constraint decouples client and server in a way that allows the server functionality to evolve independently. Details[edit] A REST client enters a REST application through a simple fixed URL. All future actions the client may take are discovered within resource representations returned from the server. The media types used for these representations, and the link relations they may contain, are standardized.
The client transitions through application states by selecting from the links within a representation or by manipulating the representation in other ways afforded by its media type. In this way, RESTful interaction is driven by hypermedia, rather than out-of-band information.[1] For example [2] here is a GET request to fetch an Account resource, requesting details in an XML representation: GET /account/12345 HTTP/1.1 Host: somebank.org Accept: application/xml ... Here is the response: HTTP/1.1 200 OK Content-Type: application/xml Content-Length: ... <? Origins[edit] HTTP/1.1: Method Definitions. Hypermedia. Hypermedia, an extension of the term hypertext, is a nonlinear medium of information which includes graphics, audio, video, plain text and hyperlinks.
This contrasts with the broader term multimedia, which may include non-interactive linear presentations as well as hypermedia. It is also related to the field of electronic literature. The term was first used in a 1965 article by Ted Nelson.[1] The World Wide Web is a classic example of hypermedia, whereas a non-interactive cinema presentation is an example of standard multimedia due to the absence of hyperlinks. Hypermedia development tools[edit] Hypermedia applications may be developed on embedded devices for the mobile and the digital signage industries using the Scalable Vector Graphics (SVG) specification from W3C (World Wide Web Consortium).
Hyperlinks may also be added to data files using most business software via the limited scripting and hyperlinking features built in. Hypermedia and learning[edit] Cultural references[edit] HATEOAS. Ongoing · Learning REST. I was talking to a colleague who has to become savvy in a hurry about modern Web applications and he asked “How do I learn about REST?” Good question. I thought of a couple of suggestions, then asked Twitter and got some more. Here they are. My initial suggestions: Architecture of the World Wide Web, Volume One; and AtomPub, a practical example of a REST protocol. From Twitter · By the way, I’m @timbray @al3x said: “How I Explained REST to My Wife”. By Tim Bray. The opinions expressed here are my own, and no other party necessarily agrees with them. A full disclosure of my professional interests is on the author page. Remote procedure call. In computer science, a remote procedure call (RPC) is an inter-process communication that allows a computer program to cause a subroutine or procedure to execute in another address space (commonly on another computer on a shared network) without the programmer explicitly coding the details for this remote interaction.[1] That is, the programmer writes essentially the same code whether the subroutine is local to the executing program, or remote.
When the software in question uses object-oriented principles, RPC is called remote invocation or remote method invocation. Many different (often incompatible) technologies have been used to implement the concept. History and origins[edit] Message passing[edit] An RPC is initiated by the client, which sends a request message to a known remote server to execute a specified procedure with supplied parameters. An important difference between remote procedure calls and local calls is that remote calls can fail because of unpredictable network problems. Atom Publishing Format and Protocol (atompub) - Charter. REST & WOA Wiki - REST & WOA Wiki. HTTP/1.1: Status Code Definitions.
Each Status-Code is described below, including a description of which method(s) it can follow and any metainformation required in the response. 10.1 Informational 1xx This class of status code indicates a provisional response, consisting only of the Status-Line and optional headers, and is terminated by an empty line. There are no required headers for this class of status code. Since HTTP/1.0 did not define any 1xx status codes, servers MUST NOT send a 1xx response to an HTTP/1.0 client except under experimental conditions.
A client MUST be prepared to accept one or more 1xx status responses prior to a regular response, even if the client does not expect a 100 (Continue) status message. Proxies MUST forward 1xx responses, unless the connection between the proxy and its client has been closed, or unless the proxy itself requested the generation of the 1xx response. 10.1.1 100 Continue The client SHOULD continue with its request. 10.1.2 101 Switching Protocols 10.2 Successful 2xx - Date. Representational state transfer. Software architectural style that defines a set of constraints to be used for creating Web services Representational state transfer (REST) is a software architectural style that defines a set of constraints to be used for creating Web services.
Web services that conform to the REST architectural style, called RESTful Web services, provide interoperability between computer systems on the Internet. RESTful Web services allow the requesting systems to access and manipulate textual representations of Web resources by using a uniform and predefined set of stateless operations. Other kinds of Web services, such as SOAP Web services, expose their own arbitrary sets of operations.[1] By using a stateless protocol and standard operations, RESTful systems aim for fast performance, reliability, and the ability to grow by reusing components that can be managed and updated without affecting the system as a whole, even while it is running.
History[edit] Roy Fielding speaking at OSCON 2008. See also[edit] How to Create a REST Protocol. December 01, 2004 Note: In this inaugural article of Joe Gregorio's new column, The Restful Web, he explains how to use the REST architectural style to create an application protocol with web-like properties. Future columns will offer additional REST-based applications and analyses. — Editor If you follow web services, then you may have heard of REST.
REST is an architectural style that can be used to guide the construction of web services. Recently, there have been attempts to create such services that have met with mixed success. This article outlines a series of steps you can follow in creating your protocol--guidance that will help you get all the benefits that REST has to offer, while avoiding common pitfalls. What Is REST? What is REST anyway? A software architecture is defined by a configuration of architectural elements--components, connectors, and data--constrained in their relationships in order to achieve a desired set of architectural properties. Why Follow REST? Employee Format.