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77 lines
2.4 KiB
C#
77 lines
2.4 KiB
C#
using System;
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using System.Linq;
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using System.Threading.Tasks;
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using MediaBrowser.Common.Net;
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using MediaBrowser.Controller.Configuration;
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using Microsoft.AspNetCore.Http;
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namespace Jellyfin.Server.Middleware
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{
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/// <summary>
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/// Validates the LAN host IP based on application configuration.
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/// </summary>
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public class LanFilteringMiddleware
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{
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private readonly RequestDelegate _next;
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/// <summary>
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/// Initializes a new instance of the <see cref="LanFilteringMiddleware"/> class.
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/// </summary>
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/// <param name="next">The next delegate in the pipeline.</param>
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public LanFilteringMiddleware(RequestDelegate next)
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{
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_next = next;
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}
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/// <summary>
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/// Executes the middleware action.
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/// </summary>
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/// <param name="httpContext">The current HTTP context.</param>
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/// <param name="networkManager">The network manager.</param>
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/// <param name="serverConfigurationManager">The server configuration manager.</param>
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/// <returns>The async task.</returns>
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public async Task Invoke(HttpContext httpContext, INetworkManager networkManager, IServerConfigurationManager serverConfigurationManager)
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{
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var currentHost = httpContext.Request.Host.ToString();
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var hosts = serverConfigurationManager
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.Configuration
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.LocalNetworkAddresses
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.Select(NormalizeConfiguredLocalAddress)
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.ToList();
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if (hosts.Count == 0)
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{
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await _next(httpContext).ConfigureAwait(false);
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return;
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}
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currentHost ??= string.Empty;
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if (networkManager.IsInPrivateAddressSpace(currentHost))
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{
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hosts.Add("localhost");
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hosts.Add("127.0.0.1");
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if (hosts.All(i => currentHost.IndexOf(i, StringComparison.OrdinalIgnoreCase) == -1))
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{
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return;
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}
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}
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await _next(httpContext).ConfigureAwait(false);
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}
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private static string NormalizeConfiguredLocalAddress(string address)
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{
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var add = address.AsSpan().Trim('/');
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int index = add.IndexOf('/');
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if (index != -1)
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{
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add = add.Slice(index + 1);
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}
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return add.TrimStart('/').ToString();
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}
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}
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}
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