Overview

DataContentViewer modules exist in the lower-right area of the default Autopsy interface, as shown below.

Module Viewer Areas

They can analyze a single file that the user has identified from either browsing directories, keyword search, etc. It doesn't matter to these modules how the user found the file. These modules allow the user to view the file in various ways. The default program comes with a hex and strings view and other modules exist to display pictures and videos as images instead of just a series of bytes. You would make a new DataContentViewer if you have a unique way of displaying a single file. These modules are passed in a reference to a specific file to display.

NetBeans Module Configuration

The rest of the document assumes that you have already created your NetBeans module, as outlined in Creating a Basic NetBeans Module.

DataContentViewer modules will have additional NetBeans dependencies. Right click on the module, choose "Properties" -> "Libraries" -> "Module Dependencies". Add "Lookup API" and "Nodes API".

Module Development

You will need a class that implements org.sleuthkit.autopsy.corecomponentinterfaces.DataContentViewer and you will need a JPanel to display. We have found the best way to do this is to make a class in the NetBeans IDE that is a "JPanel Form". This will then allow you to use the UI builder within the NetBeans IDE. After NetBeans makes the class for you, then have it implement DataContentViewer. NetBeans will of course complain about missing methods and will provide default implementations for them if you click on the error messages in the UI. Refer to the documentation in org.sleuthkit.autopsy.corecomponentinterfaces.DataContentViewer on what each method should do.

For best results, if the JPanel in your DataContentViewer contains a JScrollPane, you should should disable its horizontal scrolling, and enable horizontal resizing. This will allow the org.sleuthkit.autopsy.corecomponents.DataContentPanel containing all DataContentViewers to enable horizontal scrolling when your DataContentViewer is made smaller than its preferred width.

Autopsy will find your module using the NetBeans Lookup infrastructure. To be found, you will need to register as a service provider for DataContentViewer.class by annotating your class as follows:

@ServiceProvider(service = DataContentViewer.class)
public class DataContentViewerString extends javax.swing.JPanel implements DataContentViewer {
...

If you get errors about not knowing about ServiceProviders and such, ensure that you configured your NetBeans module to depend on the Nodes and Lookup APIs as outlined in the previous section.

Example Modules

The org.sleuthkit.autopsy.examples.SampleContentViewer class is a very simple module that you can use as a starting point. There are also modules, such as org.sleuthkit.autopsy.corecomponents.DataContentViewerHex and org.sleuthkit.autopsy.corecomponents.DataContentViewerMedia that are real modules, but they are more complex to follow since they have paging and other UI widgets in them.

Hints

Getting Content

Many of the methods get passed in a Node object as argument. What you really want is one of the Autopsy data model objects from org.sleuthkit.autopsy.datamodel. You get access to these objects from the NetBeans Lookup.

If you only want to analyze files, then you want to get the AbstractFile object from it using:

AbstractFile file = node.getLookup().lookup(AbstractFile.class);

If file is null, then it means that the node isn't for an AbstractFile (perhaps its of a full volume). Once you have the AbstractFile object, you can get the file's name, content, and metadata.

If you want to get whatever is passed in, then you can use the more generic lookup:

Content content = node.getLookup().lookup(Content.class);

This will get you all types of data model types, but you will not have access to the more specific getter methods.