Ramstack.FileProviders 1.1.0

• Ramstack.FileProviders
  • Getting Started
  • Overview
    • PrefixedFileProvider
    • SubFileProvider
    • GlobbingFileProvider
    • ZipFileProvider
  • Supported versions
  • Contributions
  • License

Ramstack.FileProviders

Represents a lightweight .NET library of useful and convenient extensions for Microsoft.Extensions.FileProviders that enhances file handling capabilities in .NET applications.

Getting Started

To install the Ramstack.FileProviders NuGet package in your project, run the following command:

dotnet add package Ramstack.FileProviders

Overview

The library offers a set of additional implementations of the IFileProvider interface:

• SubFileProvider
• PrefixedFileProvider
• ZipFileProvider
• GlobbingFileProvider

Additionally, the library provides useful extensions for IFileProvider, bringing its capabilities and experience closer to what's being provided by DirectoryInfo and FileInfo classes.

Simply stated, a FileNode knows which directory it is located in, and a directory represented by the DirectoryNode class can access its parent directory and list all files within it, recursively.

FileNode file = provider.GetFile("/docs/README");

// Prints the full path of the given file
Console.WriteLine($"Reading: {file.FullName}");

using StreamReader reader = file.OpenText();
Console.WriteLine(reader.ReadToEnd());

DirectoryNode directory = provider.GetDirectory("/docs");

foreach (FileNode file in directory.EnumerateFiles())
    Console.WriteLine(file.FullName);

Furthermore, the methods for enumerating files (EnumerateFiles/EnumerateDirectories/EnumerateFileNodes) allow specifying glob patterns to search for the desired files, as well as patterns to exclude files from the resulting list.

DirectoryNode directory = provider.GetDirectory("/project");

// Finds all *.md files and converts them to HTML
foreach (FileNode file in directory.EnumerateFiles(pattern: "**/*.md"))
    RenderMarkdown(file);

// Excludes files in a specific folder
foreach (FileNode file in directory.EnumerateFiles(pattern: "**/*.md", exclude: "vendors/**"))
    RenderMarkdown(file);

For convenience, many methods specific to DirectoryNode or FileNode are also available for IFileProvider.

Thus, if we know the directory in which to look for files or the file to read, there is no need to obtain the DirectoryNode or FileNode object.

using StreamReader reader = provider.OpenText("/docs/README", Encoding.UTF8);
Console.WriteLine(reader.ReadToEnd());

// Finds all *.md files and converts them to HTML
foreach (FileNode file in provider.EnumerateFiles("/project", pattern: "**/*.md"))
    RenderMarkdown(file);

PrefixedFileProvider

PrefixedFileProvider allows you to apply a prefix to the paths of files and directories. This is useful when you need to organize files in a virtual hierarchy.

Example:

IFileProvider provider = new PrefixedFileProvider(innerProvider, "/project/app");
IFileInfo file = provider.GetFileInfo("/project/app/docs/README");
Console.WriteLine(file.Exists);

This is how you can add virtual directories to your project that are external to the project root:

string packagesPath = Path.Combine(environment.ContentRootPath, "../Packages");
string themesPath   = Path.Combine(environment.ContentRootPath, "../Themes");

environment.ContentRootFileProvider = new CompositeFileProvider(
    new PrefixedFileProvider("/Packages", new PhysicalFileProvider(packagesPath)),
    new PrefixedFileProvider("/Themes",   new PhysicalFileProvider(themesPath)),
    environment.ContentRootFileProvider);

The Packages and Themes directories are now available to the ASP.NET infrastructure under their respective names, as if they were originally defined within your project.

Before:

/App
├── Controllers
├── Models
├── Views
└── wwwroot

/Packages
├── package-1
└── package-2

/Themes
├── theme-1
└── theme-2

After:

/App
├── Controllers
├── Models
├── Views
├── Packages         <-- (virtual)
│   ├── package1
│   └── package2
├── Themes           <-- (virtual)
│   ├── theme1
│   └── theme2
└── wwwroot

SubFileProvider

SubFileProvider lets you limit the view of the file system to a specific subdirectory, effectively creating a sandbox.

Example:

IFileProvider provider = new SubFileProvider(innerProvider, "/docs");
IFileInfo file = provider.GetFileInfo("/README");
Console.WriteLine(file.Exists);

GlobbingFileProvider

GlobbingFileProvider supports glob pattern matching for file paths, allowing for flexible file selection. You can specify patterns for both including and excluding files. It relies on the Ramstack.Globbing package for its globbing capabilities.

Example:

IFileProvider provider = new GlobbingFileProvider(innerProvider, patterns: ["**/*.txt", "docs/*.md" ], excludes: ["**/README.md"]);
foreach (FileNode file in provider.EnumerateFiles("/"))
    Console.WriteLine(file.Name);

ZipFileProvider

ZipFileProvider enables access to files within ZIP archives as if they were part of the file system.

Example:

IFileProvider provider = new ZipFileProvider("/path/to/archive.zip");
foreach (FileNode file in provider.EnumerateFiles("/", "**/*.md"))
    Console.WriteLine(file.FullName);

Supported versions

Contributions

Bug reports and contributions are welcome.

License

This package is released as open source under the MIT License. See the LICENSE file for more details.