94 lines
3.1 KiB
C#
94 lines
3.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Threading;
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using EmbedIO.Utilities;
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namespace EmbedIO.Files
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{
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/// <summary>
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/// Provides access to embedded resources to a <see cref="FileModule"/>.
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/// </summary>
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/// <seealso cref="IFileProvider" />
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public class ResourceFileProvider : IFileProvider
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{
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private readonly DateTime _fileTime = DateTime.UtcNow;
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/// <summary>
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/// Initializes a new instance of the <see cref="ResourceFileProvider"/> class.
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/// </summary>
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/// <param name="assembly">The assembly where served files are contained as embedded resources.</param>
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/// <param name="pathPrefix">A string to prepend to provider-specific paths
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/// to form the name of a manifest resource in <paramref name="assembly"/>.</param>
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/// <exception cref="ArgumentNullException"><paramref name="assembly"/> is <see langword="null"/>.</exception>
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public ResourceFileProvider(Assembly assembly, string pathPrefix)
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{
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Assembly = Validate.NotNull(nameof(assembly), assembly);
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PathPrefix = pathPrefix ?? string.Empty;
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}
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/// <inheritdoc />
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public event Action<string> ResourceChanged
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{
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add { }
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remove { }
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}
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/// <summary>
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/// Gets the assembly where served files are contained as embedded resources.
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/// </summary>
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public Assembly Assembly { get; }
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/// <summary>
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/// Gets a string that is prepended to provider-specific paths to form the name of a manifest resource in <see cref="Assembly"/>.
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/// </summary>
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public string PathPrefix { get; }
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/// <inheritdoc />
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public bool IsImmutable => true;
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/// <inheritdoc />
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public void Start(CancellationToken cancellationToken)
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{
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}
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/// <inheritdoc />
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public MappedResourceInfo? MapUrlPath(string urlPath, IMimeTypeProvider mimeTypeProvider)
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{
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var resourceName = PathPrefix + urlPath.Replace('/', '.');
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long size;
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try
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{
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using var stream = Assembly.GetManifestResourceStream(resourceName);
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if (stream == null || stream == Stream.Null)
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return null;
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size = stream.Length;
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}
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catch (FileNotFoundException)
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{
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return null;
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}
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var lastSlashPos = urlPath.LastIndexOf('/');
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var name = urlPath.Substring(lastSlashPos + 1);
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return MappedResourceInfo.ForFile(
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resourceName,
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name,
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_fileTime,
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size,
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mimeTypeProvider.GetMimeType(Path.GetExtension(name)));
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}
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/// <inheritdoc />
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public Stream OpenFile(string path) => Assembly.GetManifestResourceStream(path);
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/// <inheritdoc />
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public IEnumerable<MappedResourceInfo> GetDirectoryEntries(string path, IMimeTypeProvider mimeTypeProvider)
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=> Enumerable.Empty<MappedResourceInfo>();
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}
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} |