CAST provides a range of extensions to provide support for a wide range of technologies, both in terms of analysis and also in terms of source code extraction and discovery. These extensions have a release life cycle that is different to the CAST AIP life cycle, in other words new releases of extensions can be made public at any time.
To support the automated download of these extensions from CAST, CAST provides users with a tool called the Extension Downloader. This page provides an explanation of the Extension Downloader.
Where can I find the Extension Downloader?
The CAST Extension Downloader (ExtensionDownloader.exe) is part of CAST AIP 8.x and above and is installed by its setup. You can find it at the root of the CAST AIP installation folder.
Installed / Available / Updates
The options Installed / Available / Updates function as follows - clicking an option will refresh the content list (i.e. list of extensions):
This option displays all the extensions that have already been downloaded on to the local machine. Extensions are downloaded to:
|Available||This option displays all the extensions that are available on the remote server that have not already been downloaded to the local machine.|
|Updates||This option displays all extensions that are available on the remote server that are a more recent version of an extension that has already been downloaded to the local machine.|
The Preferences button enables you to configure a new remote download server:
By default, a remote download server will already be pre-programmed into the CAST Extension Downloader (as shown above). A tick in the check box next to the remote download server indicates that the server is being used (you can tick multiple remote download servers if necessary).
Adding a new remote download server
If you need to use an alternative remote server, then you can use this option to add it:
- Click New to add a new blank server - a new line will appear:
- Select the blank server, and then enter the details for the new remote download server in the Name and Address fields:
- The new server will be displayed in the list and will be ticked to indicate that it will be contacted.
Deleting an existing remote download server
To remove an existing remote download server:
- Select the server and click the Delete button to remove it:
The two check boxes provide the following display filtering options:
|Latest versions only||Displays only the latest version of a given extension - in other words an extension will only appear once in the list and this will be the most recent version of it. For example: if versions 1.0, 1.1 and 2.0 have been published on the server, only version 2.0 will be displayed.|
|Long term support only|
Displays only versions that have been released with Long Term Support. For example: if long term support versions 1.0, 1.1 and 2.0 have been published on the server as well as beta release 2.5, only 1.0, 1.1 and 2.0 will be displayed.
See Release types for more information about the Long Term Support releases status.
Use the Search box to filter extensions by name in the display list. Any extensions containing the search string will be displayed.
- the authentication popup is ONLY available in the standalone version (≥ 1.1.0) of the CAST Extension Downloader which is available for download from https://confluence.castsoftware.com/display/download/Extension+Downloader and in the CAST Extension Downloader provided in the CAST AIP ≥ 8.3.x. Authentication is not available in other older releases of the CAST Extension Downloader.
- you will require an account on the remote server to authenticate when using CAST Extend V3 (CAST Extend website. . You can register for an account here:
When an extension is selected in the display list, information about the extension is shown as in the example above:
- Dependencies (any extensions which will be downloaded at the same time)
- A brief description and a link to the documentation where applicable
- Tags to aid search
The CAST Extension Downloader (ExtensionDownloader.exe) can also function in command line mode as follows:
This option is used to specify either the remote server you want to connect to or a folder on disk which contains a .nupkg file.).
When connecting to a server that requires authentication (for example
Use this option to produce a list of the extensions as follows:
Use this option to specify an extension that you want to download on to your machine. Note that you may also need to specify the --username and --password options if the remote server requires authentication
Use this option to specify an extension that you have downloaded to your machine and that you now want to remove from your machine:
List all extensions that are available on the remote servers defined in thethat have not already been downloaded to the local machine:
List all extensions that are available on a specific remote server that are a more recent version of an extension that has already been downloaded to the local machine:
Download the most recent version of a specific extension on a specific remote server with authentication:
Download a specific version of a specific extension on a specific remote server with authentication:
Download a specific version of a specific extension on a specific remote server with authentication and do not download any dependencies:
Remove the most recent version of a specific extension from the local machine:
Remove a specific version of a specific extension from the local machine:
Unpack a .nupkg file on disk
CAST Extension Downloader local cache
The CAST Extension Downloader automatically creates a local cache of downloaded extensions in the following location on the local hard drive:
As a result, if you attempt to use the CAST Extension Downloader without credentials (in CLI mode), or with incorrect credentials (CLI or GUI mode) and the requested extension has already been downloaded and is present in the cache, the extension will be copied from the local cache to the extension download location (%PROGRAMDATA%\CAST\CAST\Extensions).