Because REST is based on resources, the first thing to consider when designing a web application is the nature of the resources to provide. A wiki provides only one type of resource: pages out of a flat namespace. Information in the URL path is easier to read than keeping it in the string, so a wiki page should be retrieved by sending a GET request to the CGI, appending the page name to the CGI path. The resulting resource identifier looks like /bittywiki.cgi/PageName. To modify a page, a POST request should be sent to its resource identifier.

The allowable operations on a wiki page are as follows: creating one, reading one, updating one, and deleting one. These four operations are so common to different types of resource that they have their own acronym (CRUD), used to describe the many applications designed for performing those operations. A wiki is a web-based CRUD application for named pages of text kept in a flat namespace.

Most wikis either implement page delete as a special administrator command, or don't implement it at all; this is because a page delete command makes vandalism very easy. BittyWiki's naivete with respect to the delete command is perhaps its least realistic feature.

Was this article helpful?

0 0

Post a comment