How to add a downloader

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Introduction

The documentation provided with the Updater Application Block 2.0 indicated that it was easy to extend – including adding a new Downloader. I found the documentation for actually accomplishing this task somewhat lacking. Here is a step-by-step guide to what I did to extend the application block to contain an FTP Downloader.

I extended it at the level of the application block itself because I wanted all the integrated tools to work seamlessly with my extension. Provided are downloads for the entire application block with my extension and the difference in the file set.

1. Downloaders:
   1. Create a custom Downloader which implements the IDisposable, IDownloader, and IConfigurationProvider interfaces.

      FTPDownloader (FTPDownloader.cs)

   2. Create a custom DownloadProviderData which inherits from DownloadProviderData.

      FTPDownloaderProviderData (FTPDownloaderProviderData.cs)

   

2. Updater.Configuration.Design:
   1. Create a custom DownloaderNode which inherits from DownloaderNode.

      FTPDownloaderNode (FTPDownloaderNode.cs)

   2. Add an entry for the FTPDownloaderNode in method RegisterNodeMaps in ApplicationUpdaterDesignManager.cs.
   3. Add an entry for FTPDownloaderProviderData in method RegisterXmlIncludeTypes in ApplicationUpdaterDesignManager.cs.

      

   4. Add an entry for FTPDownloaderNode in method OnAddMenuItems in DownloaderCollectionNode.cs.
3. Updater:
   1. Added FTPDownloaderNode XML node in ApplicationUpdaterText.resx.

      

   2. Added FTPDownloaderNode to MessageKey in Resources.cs.

      

4. Configuration file:
   1. Edited ServerManifest.xml to contain a named Downloader.

      

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