Powerful browser detection and custom JSP tags with Geronimo

Level: Intermediate

Daniel Wintschel (daniel@humandoing.net), Author and developer, Freelance

13 Sep 2005

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Learn how to take advantage of Apache Geronimo and Jetty to create a powerful browser and open source detection scheme. In addition to the open source (OS) Geronimo application server, this tutorial shows you how to use freely available JavaScript programs to perform browser and OS detection on the client side.

In this tutorial

• Custom JSP tags -- a refresher
  
  
• JavaScript for browser detection
  
  
• Design strategy
  
  
• Server-side components
  
  
• JSP components and sample usage
  
  
• Trying it out
  

Prerequisites

This tutorial assumes that you have basic knowledge of the Java Servlet API and the Java programming language. Some knowledge of JavaScript won't hurt either.

System requirements

To run the example code in this tutorial, you need to perform the following steps:

1. Download and install the following applications:
   • Geronimo Milestone 4 or later.
   • Apache ANT 1.6.5.
   • J2SE 1.4.2_09.
2. Make sure that the environment variables outlined in Table 1 are defined in your shell.
   

   Table 1. Setting the environmental variables

   Variable name	Required setting
   GERONIMO_HOME	Set to the root folder of your Geronimo installation
   ANT_HOME	Set to the root folder of your Ant installation
   JAVA_HOME	Set to the root folder of your Java installation
   PROJECT_HOME	Set to the root folder of your BrowserDetection application
   PATH	Ensure that ANT_HOME/bin is in your PATH

3. Extract the supplied .zip file to your preferred location (this will be the project root).

Duration

Under two hours

Formats

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