Enchilada

What is it?

Enchilada is a filesystem abstraction layer written in C#, the aim is to enable the seamless use of file operations over and between different providers.

Implemented:

• Local Filesystem - (local)
• Azure Blob Storage - (azure-blob)
• FTP/S - (ftp)

Planned:

• SCP (Secure Copy)
• AWS S3

How to contribute

1. Fork
2. Hack!
3. Pull Request

Nuget Packages

• https://www.nuget.org/packages/Enchilada/ - The main package, provides local filesystem support
• https://www.nuget.org/packages/Enchilada.Azure/ - Provides Azure blob storage
• https://www.nuget.org/packages/Enchilada.AspNetCore/ - Provides ASP.NET Core configuration support
• https://www.nuget.org/packages/Enchilada.Ftp/ - Provides FTP/S

Usage

To reference a file, simply inject the filesystem resolver (IEnchiladaFilesystemResolver) into your code, which will normally be a single instance of Enchilada.Infrastructure.EnchiladaFileProviderResolver. Once injected, simply pass in a URI (see below) to IEnchiladaFilesystemResolver.OpenFileReference, which will produce an instance of IFile, which represents the file on whatever platform your configuration specifies, regardless of whether it exists yet or not.

fileSystemResolver.OpenFileReference( "enchilada://blob_storage/image.jpg" );

The URI is made up of three parts:

• The scheme: Simply by convention this is normally enchilada://, but any such scheme can be specified
• The provider name: This mirrors the configurations you have specified in the appsettings file. It can be anything which looks like a valid URI hostname, however it must have a corresponding configuration.
• The path: as you might imagine, this is the path to the file.

Saving a file from a stream

// Injected filesystem resolver
IEnchiladaFilesystemResolver enchilada;

var tempFile = new FileInfo( "C:\\test.png" );
using ( var filestream = tempFile.OpenReadStream() )
{
	using ( var fileReference = enchilada.OpenFileReference( filepath ) )
	{
	    await fileReference.CopyFromAsync( filestream );
	}
}

Local

The local adapter allows the resolution of files on the local filesystem or UNC path. It does not currently handle connecting to resources which require authentication.

"your_configuration_name": {
	"adapter": "local",
	"directory": "C:\\my-folder"
}

Azure Blob

The Azure Blob (Binary Large Object) adapter allows the resolution of files on the azure service. Authentication is handled via the connection string.

"your_configuration_name": {
	"adapter": "azure-blob",
	"connectionString": "UseDevelopmentStorage=true;",
	"containerReference": "test",
	"createContainer": true,
	"isPublicAccess": true
}

FTP

The FTP adapter enables non-encrypted file transfer to a passive mode FTP server.

"your_configuration_name": {
	"adapter": "ftp",
	"host": "ftp.github.com",
	"port": "21",
	"directory": "/sub/folder",
	"username": "user@ftpserver.com",
	"password": "$up3r.$3cur3.p4$$w0rd"
}

AspNetCore configuration

Enchilada.AspNetCore comes with functionality to plumb your app settings configuration, straight into the AspNetCore Dependency Injection framework. To configure, simply amend the ConfigureServices method in Startup.cs as follows.

services.AddEnchilada( new EnchiladaBuilderOptions
                        {
                            Adapters = Configuration.GetSection( "Enchilada:Adapters" )
                        } );

And provide configuration in the appsettings file, e.g.

{
  "Enchilada": {
    "Adapters": {
      "local_filesystem": {
        "adapter": "local",
        "directory": "C:\\my-folder"
      },
      "blob_storage": {
        "adapter": "azure-blob",
        "connectionString": "UseDevelopmentStorage=true;",
        "containerReference": "test",
        "createContainer": true,
        "isPublicAccess": true
      }
    }
  }
}