80 lines
3.1 KiB
C#
80 lines
3.1 KiB
C#
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Collections.Generic;
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using System.Threading.Tasks;
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using Microsoft.AspNet.Builder;
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using Microsoft.AspNet.FileSystems;
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using Microsoft.AspNet.Hosting;
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using Microsoft.AspNet.Http;
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namespace Microsoft.AspNet.StaticFiles
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{
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/// <summary>
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/// Enables directory browsing
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/// </summary>
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public class DirectoryBrowserMiddleware
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{
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private readonly DirectoryBrowserOptions _options;
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private readonly PathString _matchUrl;
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private readonly RequestDelegate _next;
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/// <summary>
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/// Creates a new instance of the SendFileMiddleware.
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/// </summary>
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/// <param name="next">The next middleware in the pipeline.</param>
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/// <param name="options">The configuration for this middleware.</param>
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public DirectoryBrowserMiddleware([NotNull] RequestDelegate next, [NotNull] IHostingEnvironment hostingEnv, [NotNull] DirectoryBrowserOptions options)
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{
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if (options.Formatter == null)
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{
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throw new ArgumentException(Resources.Args_NoFormatter);
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}
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if (options.FileSystem == null)
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{
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options.FileSystem = new PhysicalFileSystem(Helpers.ResolveRootPath(hostingEnv.WebRoot, options.RequestPath));
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}
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_next = next;
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_options = options;
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_matchUrl = options.RequestPath;
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}
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/// <summary>
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/// Examines the request to see if it matches a configured directory. If so, a view of the directory contents is returned.
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/// </summary>
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/// <param name="context"></param>
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/// <returns></returns>
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public Task Invoke(HttpContext context)
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{
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// Check if the URL matches any expected paths
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PathString subpath;
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IDirectoryContents contents;
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if (Helpers.IsGetOrHeadMethod(context.Request.Method)
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&& Helpers.TryMatchPath(context, _matchUrl, forDirectory: true, subpath: out subpath)
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&& TryGetDirectoryInfo(subpath, out contents))
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{
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// If the path matches a directory but does not end in a slash, redirect to add the slash.
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// This prevents relative links from breaking.
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if (!Helpers.PathEndsInSlash(context.Request.Path))
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{
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context.Response.StatusCode = 301;
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context.Response.Headers[Constants.Location] = context.Request.PathBase + context.Request.Path + "/" + context.Request.QueryString;
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return Constants.CompletedTask;
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}
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return _options.Formatter.GenerateContentAsync(context, contents);
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}
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return _next(context);
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}
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private bool TryGetDirectoryInfo(PathString subpath, out IDirectoryContents contents)
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{
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contents = _options.FileSystem.GetDirectoryContents(subpath.Value);
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return contents.Exists;
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}
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}
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}
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