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Limited Download Tickets Extension

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The official documentation is at: http://docs.alfresco.com

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1 Requirements
2 Design
3 References
4 Contacts

Requirements

A authorised user can send a limited download URL to a user or non-user of the Alfresco repository.
The issuer of the limited download URL can specify the number of allowed downloads, the expiry date, the version available for download and other pertinent data.
The issued URL will provide the recipient with a rights to download the referenced content for a limited time period or a limited number of times.
Once the time period has passed or the number of download exceeded the URL is no longer valid.
Data about when and who downloaded information using a limited download URL should be stored.
The security of the Alfresco repository must not be compromised though the introduction of this extension.

Design

Model

When a ticket is created its details are stored in a node attached to the content for which it is relevant.
Since more than one ticket can be created for a content node, an aspect is used to model the collection of tickets associated with a content node.
The aspect is applied the first time a ticket is generated, with subsequent ticket being added to the child association modeled by the aspect.
The details of any downloads made against each ticket are stored in a download details node associated as a child of the ticket.

Model Details:

Name:	LimitedDownloadTicket
URI:	http://www.alfresco.org/model/extension/limiteddownloadticket/1.0
Prefix:	ldt

Limited Download Ticket Aspect:


<aspect name='ldt:limitedDownloadTickets'>

   <title>Limited Download Tickets</title> 

   <associations>

      <child-association name='ldt:tickets'>

         <source>
            <mandatory>false</mandatory> 
            <many>false</many> 
         </source>

         <target>
            <class>ot:limitedDownloadTicket</class> 
            <mandatory>false</mandatory> 
            <many>true</many> 
         </target>

     </child-association>

  </associations>

</aspect>

Limited Download Ticket Type:


<type name='ltd:limitedDownloadTicket'>

   <title>Limited Download Ticket</title> 

   <parent>sys:base</parent> 

   <properties>
      
      <property name='ltd:ticketString'>
         <type>d:text</type> 
         <mandatory>true</mandatory> 
      </property>

      <property name='ltd:password'>
         <type>d:text</type> 
         <mandatory>false</mandatory> 
      </property>

      <property name='ltd:invitingDate'>
         <type>d:datetime</type> 
         <mandatory>true</mandatory> 
      </property>

      <property name='ltd:toAddress'>
         <type>d:text</type> 
         <mandatory>true</mandatory> 
      </property>




      <property name='ltd:sentBy'> 
         <type>d:text</type> 
         <mandatory>true</mandatory> 
      </property>


      <property name='ltd:expireDate'>
         <type>d:date</type> 
         <mandatory>false</mandatory> 
      </property>


      <property name='ltd:versionLabel'>
         <type>d:text</type> 
         <mandatory>false</mandatory> 
      </property>

   </properties>

   <child-association name='ldt:downloads'>

      <source>
         <mandatory>false</mandatory> 
         <many>false</many> 
      </source>

      <target>
         <class>ldt:downloadDetails</class> 
         <mandatory>false</mandatory> 
         <many>true</many> 
      </target>

   </child-association>
</type>

Download Details Type:


<type name='ltd:downloadDetails'>

   <title>Download Details</title> 

   <parent>sys:base</parent> 

   <properties>


      <property name='ldt:downloadDate'> 
         <type>d:datetime</type> 
         <mandatory>true</mandatory> 
      </property>


      <property name='ldt:downloadedVersionLabel'> 
         <type>d:text</type> 
         <mandatory>true</mandatory> 
      </property>

   </properties>
</type>