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Getting Started To use Connection Manager, include the source file and its dependency in your web page with the script tag: <!-- Dependency --> < script src = "http://yui.yahooapis.com/2.9.0/build/yahoo/yahoo-min.js" >< / script > <!
XMLHttpRequest ( XHR ) is an API available in web browser scripting languages such as JavaScript . It is used to send HTTP or HTTPS requests directly to a web server and load the server response data directly back into the script. [ 1 ] Development versions of all major browsers support URI schemes beyond http: and https:, in particular, blob: URLs are supported. [ 2 ] The data might be received from the server as JSON , [ 3 ] XML , [ 4 ] HTML , or as plain text . [ 5 ] Data from the response can be used directly to alter the DOM of the currently active document in the browser window without loading a new web page document. The response data can also be evaluated by client-side scripting. For example, if it was formatted as JSON by the web server, it can easily be converted into a client-side data object for further use.
REST (REpresentational State Transfer) is a phrase coined by Roy Fielding in his dissertation Architectural Styles and the Design of Network-based Software Architectures . It is an attempt to describe the undocumented architectural design principles behind the Web. In fact you are using the World's largest and most popular REST system right now, yes, the World Wide Web. "The World Wide Web architecture has evolved into a novel architectural style that I call 'representational state transfer.' Using elements of the client/server, pipe-and-filter, and distributed objects paradigms, this style optimises the network transfer of representations of a resource.
It's often hard for people to "get" REST, this is mostly due to the fact that REST isn't a tangible thing like a piece of software or even a specification, it's a selection of ideals, of best practices distilled from the HTTP specs. I've always found that the best way to understand something is to see an example, to see the principles in action first and worry about the details later once I understand the general gist. So here's a little example of a RESTful version of a simple Web service you might already know about, the Delicious API . Delicious has a simple REST API , or rather, a simple POX over HTTP API, that is, it has a perfectly usable HTTP and XML based API for accessing your bookmarks and tags, but it isn't very RESTful. Why not? First class objects aren't exposed as resources, so we can't access our bookmarks or tags directly.
Representational State Transfer ( REST ) is a style of software architecture for distributed systems such as the World Wide Web . REST has emerged as a predominant web API design model. The term representational state transfer was introduced and defined in 2000 by Roy Fielding in his doctoral dissertation. [ 1 ] [ 2 ] Fielding is one of the principal authors of the Hypertext Transfer Protocol (HTTP) specification versions 1.0 and 1.1. [ 3 ] [ 4 ] [ edit ] About The REST architectural style was developed by W3C Technical Architecture Group [ 5 ] (TAG) in parallel with HTTP /1.1, based on the existing design of HTTP/1.0. [ 6 ] The World Wide Web represents the largest implementation of a system conforming to the REST architectural style.
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