From 599432890311c9255cb376bbeb6f5f4f673fbf1b Mon Sep 17 00:00:00 2001
From: Bond_009 <bond.009@outlook.com>
Date: Thu, 2 Jan 2020 21:22:10 +0100
Subject: [PATCH] Fix baseurl (again)

---
 .../ApplicationHost.cs                        | 40 +++++++++++++------
 .../IServerApplicationHost.cs                 |  8 ++--
 2 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/Emby.Server.Implementations/ApplicationHost.cs b/Emby.Server.Implementations/ApplicationHost.cs
index 67bc0cd2b1..9b853c6d13 100644
--- a/Emby.Server.Implementations/ApplicationHost.cs
+++ b/Emby.Server.Implementations/ApplicationHost.cs
@@ -103,14 +103,11 @@ using MediaBrowser.Providers.Subtitles;
 using MediaBrowser.Providers.TV.TheTVDB;
 using MediaBrowser.WebDashboard.Api;
 using MediaBrowser.XbmcMetadata.Providers;
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Extensions;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
-using Microsoft.OpenApi.Models;
 using OperatingSystem = MediaBrowser.Common.System.OperatingSystem;
 
 namespace Emby.Server.Implementations
@@ -1478,7 +1475,7 @@ namespace Emby.Server.Implementations
         /// </summary>
         /// <param name="address">The IPv6 address.</param>
         /// <returns>The IPv6 address without the scope id.</returns>
-        private string RemoveScopeId(string address)
+        private ReadOnlySpan<char> RemoveScopeId(ReadOnlySpan<char> address)
         {
             var index = address.IndexOf('%');
             if (index == -1)
@@ -1486,33 +1483,50 @@ namespace Emby.Server.Implementations
                 return address;
             }
 
-            return address.Substring(0, index);
+            return address.Slice(0, index);
         }
 
+        /// <inheritdoc />
         public string GetLocalApiUrl(IPAddress ipAddress)
         {
             if (ipAddress.AddressFamily == AddressFamily.InterNetworkV6)
             {
                 var str = RemoveScopeId(ipAddress.ToString());
+                Span<char> span = new char[str.Length + 2];
+                span[0] = '[';
+                str.CopyTo(span.Slice(1));
+                span[^1] = ']';
 
-                return GetLocalApiUrl("[" + str + "]");
+                return GetLocalApiUrl(span);
             }
 
             return GetLocalApiUrl(ipAddress.ToString());
         }
 
-        public string GetLocalApiUrl(string host)
+        /// <inheritdoc />
+        public string GetLocalApiUrl(ReadOnlySpan<char> host)
         {
+            var url = new StringBuilder(64);
             if (EnableHttps)
             {
-                return string.Format("https://{0}:{1}",
-                    host,
-                    HttpsPort.ToString(CultureInfo.InvariantCulture));
+                url.Append("https://");
+            }
+            else
+            {
+                url.Append("http://");
+            }
+
+            url.Append(host)
+                .Append(':')
+                .Append(HttpPort);
+
+            string baseUrl = ServerConfigurationManager.Configuration.BaseUrl;
+            if (baseUrl.Length != 0)
+            {
+                url.Append('/').Append(baseUrl);
             }
 
-            return string.Format("http://{0}:{1}",
-                    host,
-                    HttpPort.ToString(CultureInfo.InvariantCulture));
+            return url.ToString();
         }
 
         public Task<List<IPAddress>> GetLocalIpAddresses(CancellationToken cancellationToken)
diff --git a/MediaBrowser.Controller/IServerApplicationHost.cs b/MediaBrowser.Controller/IServerApplicationHost.cs
index b3c56bdd5f..25f0905eb8 100644
--- a/MediaBrowser.Controller/IServerApplicationHost.cs
+++ b/MediaBrowser.Controller/IServerApplicationHost.cs
@@ -71,13 +71,15 @@ namespace MediaBrowser.Controller
         /// <summary>
         /// Gets the local API URL.
         /// </summary>
-        /// <param name="host">The host.</param>
-        /// <returns>System.String.</returns>
-        string GetLocalApiUrl(string host);
+        /// <param name="hostname">The hostname.</param>
+        /// <returns>The local API URL.</returns>
+        string GetLocalApiUrl(ReadOnlySpan<char> hostname);
 
         /// <summary>
         /// Gets the local API URL.
         /// </summary>
+        /// <param name="address">The IP address.</param>
+        /// <returns>The local API URL.</returns>
         string GetLocalApiUrl(IPAddress address);
 
         void LaunchUrl(string url);