Feydra Getting Started


When creating a Sitecore web application, there are many dependencies between the tasks of front-end and back-end developers. Feydra tries to break these dependencies by allowing front-end developers to work on the Sitecore web application without needing to install and maintain an entire Sitecore development environment.

The Virtual Sandbox - How it works

Feydra allows any MVC web application to host front-end development by creating virtual sandboxes for each front-end developer. A virtual sandbox is a virtualized environment in which front-end assets (css, js, cshtml, etc.) can be selectively replaced without disturbing the back-end functionality of the web application. This virtualization allows back-end developers to create stubs for front-end functionality without having the actual front-end assets available at development time. The front-end developers can hook-up the components as they become available without impacting back-end development.

Feydra also greatly improves front-end developers’ ability to maintain and update their portion of the web application. If there are issues with the front-end functionality of the site, a front-end developer can easily update the front-end assets in their virtual sandbox and test fixes against a working web application; all without the overhead of maintaining a full Sitecore development environment or MVC application.

Ultimately, Feydra is designed to allow front-end developers to use their preferred development environment; make their changes in a virtual sandbox and test by pushing their changes to a shared location (File share, FTP, etc.) using standard tools.

Installation with NuGet

Feydra is distributed as a .zip of NuGet packages. These packages can be added to a local NuGet feed to make them accessible to developers and the build process.

To install Feydra, simply add the NuGet package Hedgehog.Feydra to a web application and the Feydra assembly is automatically installed. If the developer is using Sitecore, add the NuGet package Hedgehog.Feydra.Sitecore to the web application.

The MVC core of Feydra consists of a single assembly called Hedgehog.Feydra.dll. If this file is present in the /bin folder of a website, Feydra will be available on that server. Deleting this file will remove Feydra.

The Sitecore components of Feydra consist of two additional files. These are Hedgehog.Feydra.SC.dll and Z_Feydra.config. These are installed in the /bin and /App_Config/Include folders, respectively.

Installation without NuGet

To install Feydra without using NuGet, extract the files from the NuGet packages and place the files in the folders specified in the table below:

File Folder
Hedgehog.Feydra.dll Hedgehog.Feydra.SC.dll \bin
Z_Feydra.config /App_Config/Include


Feydra needs to be deployed on the servers where the front-end developers are going to be updating front-end assets. This can be any server capable of running the web application. We recommend using a server that is not used for CI builds, since the build/deployment process will interfere with the front-end developer testing.

Feydra doesn’t support load balanced servers. Load balanced servers are typically not needed in a development environment, so this should not be a major problem.

The Feydra assemblies and configuration files should not be deployed to a production server.


Feydra needs to create a few folders on the web server for proper operation. In most cases, Feydra can create these folders automatically. Feydra will display an error message if it does not have permission to create the folders during the initialization process. Granting the permission to create/write to the folders specified in the Feydra error messages will resolve the startup errors. If this is not possible because of infrastructure restrictions, you need to create the folders Feydra requires as part of your deployment process.

The following is a list of the folders used by Feydra:

File/Folder Comments
~/App_Data/Feydra This folder stores all Feydra data (Users, Licenses, Logs, etc.). Feydra must be able to write to this folder. Overwriting or removing this folder at deployment time will remove any users or licenses installed in Feydra.
~/Areas/Feydra Feydra uses this folder to store the web.config file needed for the Feydra views. Feydra creates the web.config file at initialization time, and therefore, Feydra needs write access to this folder.
~/App_Data/Feydra/*.dat Any data files (.dat extension) files in this folder must be writable for Feydra to function correctly.
~/FeydraRoot This is the location of the users Virtual Sandboxes. This folder must be writable for Feydra to function correctly. The front-end developers must also be able to write files to this folder using a file share or FTP protocol.

Creating a new user will cause Feydra to create a user’s Virtual Sandbox as a folder under the FeydraRoot folder.


Once Feydra is installed on a server, Feydra will verify the environment and display error messages indicating any problems found on the server that would prevent Feydra from functioning correctly. The following is a list of requirements Feydra will check at startup:

  • There is a folder called FeydraRoot in the root of the website. If the folder doesn’t exist, Feydra will try to add it. Feydra will report a problem if the folder cannot be created.
  • The Web Server needs write rights to FeydraRoot.
  • There must be a folder called /App_Data/Feydra. If the folder doesn’t exist, Feydra will try to add it. Feydra will report an error if the folder cannot be created.
  • The Web Server needs write rights to /App_Data/Feydra and all files in that folder.
  • The Web Server needs write rights to a folder called /Areas/Feydra.
  • The property runAllManagedModulesForAllRequests must be set on the /configuration/modules element in the web.config.