This repository has been archived by the owner on Nov 22, 2018. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 75
/
DirectoryBrowserMiddleware.cs
107 lines (95 loc) · 4.45 KB
/
DirectoryBrowserMiddleware.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Text.Encodings.Web;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.FileProviders;
using Microsoft.Extensions.Options;
using Microsoft.Net.Http.Headers;
namespace Microsoft.AspNetCore.StaticFiles
{
/// <summary>
/// Enables directory browsing
/// </summary>
public class DirectoryBrowserMiddleware
{
private readonly DirectoryBrowserOptions _options;
private readonly PathString _matchUrl;
private readonly RequestDelegate _next;
private readonly IDirectoryFormatter _formatter;
private readonly IFileProvider _fileProvider;
/// <summary>
/// Creates a new instance of the SendFileMiddleware. Using <see cref="HtmlEncoder.Default"/> instance.
/// </summary>
/// <param name="next">The next middleware in the pipeline.</param>
/// <param name="hostingEnv">The <see cref="IHostingEnvironment"/> used by this middleware.</param>
/// <param name="options">The configuration for this middleware.</param>
public DirectoryBrowserMiddleware(RequestDelegate next, IHostingEnvironment hostingEnv, IOptions<DirectoryBrowserOptions> options)
: this(next, hostingEnv, HtmlEncoder.Default, options)
{
}
/// <summary>
/// Creates a new instance of the SendFileMiddleware.
/// </summary>
/// <param name="next">The next middleware in the pipeline.</param>
/// <param name="hostingEnv">The <see cref="IHostingEnvironment"/> used by this middleware.</param>
/// <param name="encoder">The <see cref="HtmlEncoder"/> used by the default <see cref="HtmlDirectoryFormatter"/>.</param>
/// <param name="options">The configuration for this middleware.</param>
public DirectoryBrowserMiddleware(RequestDelegate next, IHostingEnvironment hostingEnv, HtmlEncoder encoder, IOptions<DirectoryBrowserOptions> options)
{
if (next == null)
{
throw new ArgumentNullException(nameof(next));
}
if (hostingEnv == null)
{
throw new ArgumentNullException(nameof(hostingEnv));
}
if (encoder == null)
{
throw new ArgumentNullException(nameof(encoder));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
_next = next;
_options = options.Value;
_fileProvider = _options.FileProvider ?? Helpers.ResolveFileProvider(hostingEnv);
_formatter = options.Value.Formatter ?? new HtmlDirectoryFormatter(encoder);
_matchUrl = _options.RequestPath;
}
/// <summary>
/// Examines the request to see if it matches a configured directory. If so, a view of the directory contents is returned.
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public Task Invoke(HttpContext context)
{
// Check if the URL matches any expected paths
if (Helpers.IsGetOrHeadMethod(context.Request.Method)
&& Helpers.TryMatchPath(context, _matchUrl, forDirectory: true, subpath: out var subpath)
&& TryGetDirectoryInfo(subpath, out var contents))
{
// If the path matches a directory but does not end in a slash, redirect to add the slash.
// This prevents relative links from breaking.
if (!Helpers.PathEndsInSlash(context.Request.Path))
{
context.Response.StatusCode = 301;
context.Response.Headers[HeaderNames.Location] = context.Request.PathBase + context.Request.Path + "/" + context.Request.QueryString;
return Task.CompletedTask;
}
return _formatter.GenerateContentAsync(context, contents);
}
return _next(context);
}
private bool TryGetDirectoryInfo(PathString subpath, out IDirectoryContents contents)
{
contents = _fileProvider.GetDirectoryContents(subpath.Value);
return contents.Exists;
}
}
}