From 571d0570f5560bde79d21c33173742f6a31e24cf Mon Sep 17 00:00:00 2001
From: Claus Vium <clausvium@gmail.com>
Date: Thu, 3 Sep 2020 11:32:22 +0200
Subject: Kill HttpListenerHost

---
 .../Middleware/BaseUrlRedirectionMiddleware.cs     | 62 ++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 Jellyfin.Server/Middleware/BaseUrlRedirectionMiddleware.cs

(limited to 'Jellyfin.Server/Middleware/BaseUrlRedirectionMiddleware.cs')

diff --git a/Jellyfin.Server/Middleware/BaseUrlRedirectionMiddleware.cs b/Jellyfin.Server/Middleware/BaseUrlRedirectionMiddleware.cs
new file mode 100644
index 000000000..9316737bd
--- /dev/null
+++ b/Jellyfin.Server/Middleware/BaseUrlRedirectionMiddleware.cs
@@ -0,0 +1,62 @@
+using System;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Configuration;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using ConfigurationExtensions = MediaBrowser.Controller.Extensions.ConfigurationExtensions;
+
+namespace Jellyfin.Server.Middleware
+{
+    /// <summary>
+    /// Redirect requests without baseurl prefix to the baseurl prefixed URL.
+    /// </summary>
+    public class BaseUrlRedirectionMiddleware
+    {
+        private readonly RequestDelegate _next;
+        private readonly ILogger<BaseUrlRedirectionMiddleware> _logger;
+        private readonly IConfiguration _configuration;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="BaseUrlRedirectionMiddleware"/> class.
+        /// </summary>
+        /// <param name="next">The next delegate in the pipeline.</param>
+        /// <param name="logger">The logger.</param>
+        /// <param name="configuration">The application configuration.</param>
+        public BaseUrlRedirectionMiddleware(
+            RequestDelegate next,
+            ILogger<BaseUrlRedirectionMiddleware> logger,
+            IConfiguration configuration)
+        {
+            _next = next;
+            _logger = logger;
+            _configuration = configuration;
+        }
+
+        /// <summary>
+        /// Executes the middleware action.
+        /// </summary>
+        /// <param name="httpContext">The current HTTP context.</param>
+        /// <param name="serverConfigurationManager">The server configuration manager.</param>
+        /// <returns>The async task.</returns>
+        public async Task Invoke(HttpContext httpContext, IServerConfigurationManager serverConfigurationManager)
+        {
+            var localPath = httpContext.Request.Path.ToString();
+            var baseUrlPrefix = serverConfigurationManager.Configuration.BaseUrl;
+
+            if (string.Equals(localPath, baseUrlPrefix + "/", StringComparison.OrdinalIgnoreCase)
+                || string.Equals(localPath, baseUrlPrefix, StringComparison.OrdinalIgnoreCase)
+                || string.Equals(localPath, "/", StringComparison.OrdinalIgnoreCase)
+                || string.IsNullOrEmpty(localPath)
+                || !localPath.StartsWith(baseUrlPrefix, StringComparison.OrdinalIgnoreCase))
+            {
+                // Always redirect back to the default path if the base prefix is invalid or missing
+                _logger.LogDebug("Normalizing an URL at {LocalPath}", localPath);
+                httpContext.Response.Redirect(baseUrlPrefix + "/" + _configuration[ConfigurationExtensions.DefaultRedirectKey]);
+                return;
+            }
+
+            await _next(httpContext).ConfigureAwait(false);
+        }
+    }
+}
-- 
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