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articlebig-ipnewstechtip February 02, 2012 by George Watkins
Introduction  Datagroups and tables are the two primary methods we have in iRules for organizing key and value pairs. Both can be reused for subsequent connections. Datagroups have the advantage of being directly editable from the BIG-IP user interface, however they cannot be modified from within an iRule. This would open a potential security hole by allowing BIG-IP filesystem access from an iRule. Tables on the other hand must be populated from within an iRule, which allows for tracking...
articlebig-ipnewstechtip August 11, 2010 by George Watkins
The Small URL Generator was born partly out of curiosity and partly out of necessity. It started off when I was in our IT department here at F5 when a coworker and I began discussing what it would take to build an in-house application to shorten URLs. Why didn’t we use one of the professionally available services you ask? If we were to make this service available company-wide, there was a possibility that someone could potentially disclose confidential information in an URL, ie. http://sales-app...
articleirulesweb servicexmldevtechtip December 15, 2008 by Lori MacVittie
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:...
articleirulesbig-ipdevnewstechtip June 19, 2008 by Colin Walker
Today's internet is a fast paced, demanding, and ever changing environment. Applications that want to live in this space and keep up need to have the ability to roll with the punches, to change as quickly as the user's requirements do. This means being agile, loosely bound, and fast on their ... well ... bits. If this is starting to sound like another introduction to SOA, that's only because it is. SOAs or Service Oriented Architectures are a way in which applications and the developers that b...
Unifying REST Methods with iRules REST (Representational State Transfer) is a web architecture that allows a CRUD (Create, read, update, delete) model to be implemented via HTTP. The ideal REST architecture makes use of the HTTP methods described in RFC 2616 and simple URIs to correlate an action with a specific resource. If we wanted to create a resource in a web-based CRM (Customer Relationship Management) system using a REST interface, we might send a request that looks something like thi...
Ever wondered how you could bring the power of iControl to your browser? A little AJAX (Asynchronous Javascript and XML) magic and you'll be well on your way to building a real-time web-based management or monitoring application for your BIG-IP using iControl. What's probably going to sound strange is that the AJAX part of the web application is the easy part. That's right, AJAX is easy. That's because security restrictions on the XMLHttpRequest object - the heart of AJAX - mean that you c...
By Lori  MacVittie In the increasingly buzzword compliant world of SOA and Web 2.0 it is inevitable that you have, or will, come across three of the industries’ favorite terms: composites, mashups, and processes. These terms represent concepts that while similar actually describe very different uses of services. The distinctions between the three are subtle and in many cases it makes almost no sense to differentiate between them. But one of the goals of SOA is to provide a common ...
Introduction Any large development library has some choices to make about implementation, and iControl is no exception. A library is designed to give others access to routines that you have written (in our case, BIG-IP interfaces), and when the public-facing interfaces are defined, the designers have to try and foresee how the majority of users will want to use the library.  With iControl for BIG-IP, the design was approached as what I call “Building Block Minimalist”. That’s where you bu...
So, now that you've got the marketing overview of iControl all figured out, the next question you are likely to have is regarding how iControl works from a technical perspective.  This article will attempt to illustrate the various components of an iControl application. Before we go any further, I'm going to describe all the technical terms that I'll be using so hopefully when you read further in the article, you understand what I'm talking about. API (Application Programming Inte...
kSOAP is a lightweight access library for web services. Designed with hand-held devices in mind, it's light and easy to use, but documentation and samples for the project is lacking. YOu can download the kSOAP libraries and JavaDoc documentation here. There are not a ton of solid examples out their for using KSOAP to access web services, in fact, only one page on a wiki has good solid examples, and they're not well explained. Since we're using kSOAP to access BIG-IP from cell phones via JavaSE...
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