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RackDAV - Web Authoring for Rack

RackDAV is Handler for Rack, which allows content authoring over HTTP. RackDAV brings its own file backend, but other backends are possible by subclassing RackDAV::Resource.

Install

Just install the gem from RubyGems:

$ gem install rack_dav

Quickstart

If you just want to share a folder over WebDAV, you can just start a simple server with:

$ rack_dav

This will start a WEBrick server on port 3000, which you can connect to without authentication.

Rack Handler

Using RackDAV inside a rack application is quite easy. A simple rackup script looks like this:

require 'rubygems'
require 'rack_dav'

use Rack::CommonLogger

run RackDAV::Handler.new(:root => '/path/to/docs')

Implementing your own WebDAV resource

RackDAV::Resource is an abstract base class and defines an interface for accessing resources.

Each resource will be initialized with a path, which should be used to find the real resource.

RackDAV::Handler needs to be initialized with the actual resource class:

RackDAV::Handler.new(:resource_class => MyResource)

RackDAV needs some information about the resources, so you have to implement following methods:

  • children: If this is a collection, return the child resources.

  • collection?: Is this resource a collection?

  • exist?: Does this recource exist?

  • creation_date: Return the creation time.

  • last_modified: Return the time of last modification.

  • last_modified=(time): Set the time of last modification.

  • etag: Return an Etag, an unique hash value for this resource.

  • content_type: Return the mime type of this resource.

  • content_length: Return the size in bytes for this resource.

Most importantly you have to implement the actions, which are called to retrieve and change the resources:

  • get(request, response): Write the content of the resource to the response.body.

  • put(request, response): Save the content of the request.body.

  • post(request, response): Usually forbidden.

  • delete: Delete this resource.

  • copy(dest): Copy this resource to given destination resource.

  • move(dest): Move this resource to given destination resource.

  • make_collection: Create this resource as collection.

  • lock(locktoken, timeout, lockscope=nil, locktype=nil, owner=nil): Lock this resource. If scope, type and owner are nil, refresh the given lock.

  • unlock(token): Unlock this resource

Note, that it is generally possible, that a resource object is instantiated for a not yet existing resource.

For inspiration you should have a look at the FileResource implementation. Please let me now, if you are going to implement a new type of resource.

RackDAV on GitHub

Download or fork the project on its Github page