Learning from the toy apps¶

UBOS provides two “toy” Apps that help explain how to package and distribute real web Apps on UBOS:

• “Hello World” is an extremely simple Web applications that just displays Hello World when accessed over the web. We use it to give you a taste for what is involved to package web application for UBOS.
• “Glad-I-Was-Here” is a slightly more complex “guestbook” web application that uses a relational database to store the guestbook entries. We use it to illustrate how to package web Apps that use a database. It now comes in four versions:
  • implemented in PHP with a MySQL backend, called gladiwashere-php-mysql;
  • implemented in PHP with a Postgresql backend, called gladiwashere-php-postgresql;
  • implemented in Java with a MySQL backend, called gladiwashere-java-mysql; and
  • implemented in Python/WSGI with a MySQL backend, called gladiwashere-python-mysql

The PHP versions of Glad-I-Was-Here can also be configured with an Accessory called gladiwashere-php-footer. This Accessory adds additional content (a footer) to the main web page. This demonstrates the basic functioning of Accessories.

To understand how to package a Ruby-on-Rails application, we have used the “blog” example application used to teach RoR on the rubyonrails.org website, and packaged it for UBOS.

Note: These toy Apps are published in the toyapps repository, which is not enabled by default. For how to enable, see Enabling non-standard package repositories.

You may want to read through the documentation for these Apps in this sequence: