System Requirements for OpenLaszlo

OpenLaszlo's adherence to open standards simplifies the server-side and client-side deployment requirements. These requirements are summarized below.

Client Requirements

Requirements for OpenLaszlo 4.2

OpenLaszlo 4.2 has been fully tested and is supported with these browser/platform combinations:

  • Windows XP/Internet Explorer 7 -- Flash 8, Flash 9, and DHTML
  • Windows XP/Internet Firefox 3 -- Flash 8, Flash 9, and DHTML
  • Linux 2.6 kernel Firefox 3 -- Flash 8, Flash 9, and DHTML
  • Mac OS X Firefox 3 -- Flash 8, Flash 9, and DHTML
  • Mac OS X Safari 3 -- Flash 8, Flash 9, and DHTML

OpenLaszlo has been tested on Windows Vista but is not fully qualified on that release. Please see the OpenLaszlo 4.2 Release Notes for more information on running the OpenLaszlo Server on Vista.

Minimum support for DHTML with browsers require support for ECMAScript v3, DOM Level 2, and CSS 2.1.

These browser/platform combinations have not been tested with OpenLaszlo and are not supported, but we believe they should work properly under normal circumstances:

  • Flash 7
  • Flash 10 -- OpenLaszlo should work with the Flash 10 for Flash 8 or Flash 9 compiled applications. Support for Flash 10 features are not currently supported
  • Firefox releases prior to Firefox 3
  • Safari releases prior to Safari 3
  • Internet Explorer 6
  • Internet Explorer 8, Mozilla nightly, Webkit nightly -- we do not formally test and qualify beta and development releases
  • Opera releases 8 and greater

These browser/platform combinations are not supported:

  • Flash versions 6 and before
  • Opera versions 7 and before
  • Internet Explorer versions 5 and before

For OpenLaszlo versions prior to release 4.2, please see the release notes supplied with the release for compatibility information.

Server Requirements

We recommend use of the servers for development purposes only. Our recommendation is that all OpenLaszlo applications be compiled in SOLO mode for deployment and can be deployed on any web server in that configuration.

OpenLaszlo is 100% pure Java and runs in server environments that provide:

  • Java Runtime Environment (JRE) 1.5 or greater. Note that the OpenLaszlo Developer Kit requires the Java SDK, since Jakarta Tomcat, the servlet container that ships with it, needs the Java SDK.
  • A Java Servlet container supporting at least version 2.2 of the Java Servlet Specification. This is only required for OpenLaszlo Core. OpenLaszlo Developer Kit ships with Tomcat 5.0.24.