The following list contains several Opera Unite utility libraries that we have made available for you to use in your Opera Unite applications. These libraries contain several reusable functions to save you time and make life easier.
This file contains an API for publishing to an activity stream (partly based on http://activitystrea.ms/). The resulting stream will be an Atom feed with an activity extension in the "http://activitystrea.ms/spec/1.0/" namespace, which can be used to programatically analyze the feed.
The File I/O API provides you with functionality needed to access data on the desktop from widgets or Unite Apps.
This library handles the loading of all your application's external library resources, including making sure all dependencies are present, and that the directory structure is ok.
This library provides a simple pub/sub output, which replaces the functionality of opera.postError and allows developers to easily subscribe to the debug outputs they want.
ResourceFetcher is a class for periodically downloading resources from URLs. You can use it to not only download the resources, but also provide reporting on whether the downloads are successful. You can also set parameters such as the time to wait between making each download request, and the time to wait before you assume a download has failed and give a timeout error.
widgetLocalization derives the user agent's locale using the algorithm found in http://www.w3.org/TR/widgets/#step-5--derive-the-user-agents-locale. You can then use the gettext library mentioned above to retrieve and handle the appropriate language files for that locale, if they are available.
The Service discovery API lets you discover services that announce their presence on a network. You can then contact these services and potentially use data from them.
The Opera Unite application framework, foundation of Opera Unite applications.