 | Level: Intermediate Mark McKeown (Mark.McKeown@manchester.ac.uk), Freelance Writer, U.K. Grid Support Center
Bruno Harbulot (Bruno.Harbulot@manchester.ac.uk), Grid Architect, MichaelDKelly.com
08 May 2007 Learn how the state of a WS-Resource deployed in WSRF::Lite, a Perl implementation of the Web Service Resource Framework (WSRF), can be displayed and modified by a Web browser using Asynchronous JavaScript + XML (Ajax). In this tutorial, an example WS-Resource illustrates how you can combine XSLT and JavaScript code with WSRF in WSRF::Lite to create Web browser-based clients. In this tutorial
In this tutorial, you take the example counter WS-Resource from "Build WS-Resources with WSRF::Lite" and learn how it can be queried and updated using a Web browser. The tutorial begins with a short review of WSRF, WSRF::Lite, and the counter WS-Resource. Then you learn how to use HTTP to access WS-Resources in WSRF::Lite. Next, the tutorial introduces you to XSLT and shows how you can use it to transform the XML ResourcePropertyDocument of the counter WS-Resource into HTML for display in a browser. Finally, you use JavaScript code to automatically update the browser page, as well as modify the value of the counter WS-Resource.
Prerequisites
You should be familiar with Perl, WSRF, and WSRF::Lite. If you are unfamiliar with WSRF::Lite or WSRF, we recommend completing the first tutorial in the series, "Build WS-Resources with WSRF::Lite." However, it is not necessary to complete the second tutorial, "Build secure WS-Resources with WSRF::Lite and WS-Security," as the focus in this tutorial is not on security. The tutorial introduces and discusses XSLT, CSS, and JavaScript coding.
System requirements
To run the examples in this tutorial, you need a computer running Linux® and WSRF::Lite V0.8.2 or later. The Perl module XML::CanonicalizeXML must also be installed. WSRF::Lite can function without this, but it is required to support access using Ajax, which is the focus of this tutorial. You also need Mozilla Firefox or Windows® Internet Explorer® to query and update the example counter WS-Resource used here. A command-line HTTP client, such as curl or wget is also required.
Formats html, pdf
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