1 files changed, 98 insertions, 37 deletions

diff --git a/MediaBrowser.Api/BaseApiService.cs b/MediaBrowser.Api/BaseApiService.cs
index 5f1f6c5b1..2b994d279 100644
--- a/MediaBrowser.Api/BaseApiService.cs
+++ b/MediaBrowser.Api/BaseApiService.cs
@@ -1,5 +1,7 @@
 using System;
+using System.IO;
 using System.Linq;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
@@ -16,19 +18,35 @@ namespace MediaBrowser.Api
     /// <summary>
     /// Class BaseApiService
     /// </summary>
-    public class BaseApiService : IService, IRequiresRequest
+    public abstract class BaseApiService : IService, IRequiresRequest
     {
+        public BaseApiService(
+            ILogger logger,
+            IServerConfigurationManager serverConfigurationManager,
+            IHttpResultFactory httpResultFactory)
+        {
+            Logger = logger;
+            ServerConfigurationManager = serverConfigurationManager;
+            ResultFactory = httpResultFactory;
+        }
+
         /// <summary>
-        /// Gets or sets the logger.
+        /// Gets the logger.
         /// </summary>
         /// <value>The logger.</value>
-        public ILogger Logger => ApiEntryPoint.Instance.Logger;
+        protected ILogger Logger { get; }
 
         /// <summary>
-        /// Gets or sets the HTTP result factory.
+        /// Gets or sets the server configuration manager.
+        /// </summary>
+        /// <value>The server configuration manager.</value>
+        protected IServerConfigurationManager ServerConfigurationManager { get; }
+
+        /// <summary>
+        /// Gets the HTTP result factory.
         /// </summary>
         /// <value>The HTTP result factory.</value>
-        public IHttpResultFactory ResultFactory => ApiEntryPoint.Instance.ResultFactory;
+        protected IHttpResultFactory ResultFactory { get; }
 
         /// <summary>
         /// Gets or sets the request context.
@@ -36,10 +54,7 @@ namespace MediaBrowser.Api
         /// <value>The request context.</value>
         public IRequest Request { get; set; }
 
-        public string GetHeader(string name)
-        {
-            return Request.Headers[name];
-        }
+        public string GetHeader(string name) => Request.Headers[name];
 
         public static string[] SplitValue(string value, char delim)
         {
@@ -292,51 +307,97 @@ namespace MediaBrowser.Api
             return result;
         }
 
-        protected string GetPathValue(int index)
+        /// <summary>
+        /// Gets the path segment at the specified index.
+        /// </summary>
+        /// <param name="index">The index of the path segment.</param>
+        /// <returns>The path segment at the specified index.</returns>
+        /// <exception cref="IndexOutOfRangeException" >Path doesn't contain enough segments.</exception>
+        /// <exception cref="InvalidDataException" >Path doesn't start with the base url.</exception>
+        protected internal ReadOnlySpan<char> GetPathValue(int index)
         {
-            var pathInfo = Parse(Request.PathInfo);
-            var first = pathInfo[0];
+            static void ThrowIndexOutOfRangeException()
+                => throw new IndexOutOfRangeException("Path doesn't contain enough segments.");
+
+            static void ThrowInvalidDataException()
+                => throw new InvalidDataException("Path doesn't start with the base url.");
 
-            string baseUrl = ApiEntryPoint.Instance.ConfigurationManager.Configuration.BaseUrl;
+            ReadOnlySpan<char> path = Request.PathInfo;
 
-            // backwards compatibility
-            if (baseUrl.Length == 0)
+            // Remove the protocol part from the url
+            int pos = path.LastIndexOf("://");
+            if (pos != -1)
             {
-                if (string.Equals(first, "mediabrowser", StringComparison.OrdinalIgnoreCase)
-                    || string.Equals(first, "emby", StringComparison.OrdinalIgnoreCase))
-                {
-                    index++;
-                }
+                path = path.Slice(pos + 3);
             }
-            else if (string.Equals(first, baseUrl.Remove(0, 1)))
+
+            // Remove the query string
+            pos = path.LastIndexOf('?');
+            if (pos != -1)
+            {
+                path = path.Slice(0, pos);
+            }
+
+            // Remove the domain
+            pos = path.IndexOf('/');
+            if (pos != -1)
             {
-                index++;
-                var second = pathInfo[1];
-                if (string.Equals(second, "mediabrowser", StringComparison.OrdinalIgnoreCase)
-                    || string.Equals(second, "emby", StringComparison.OrdinalIgnoreCase))
+                path = path.Slice(pos);
+            }
+
+            // Remove base url
+            string baseUrl = ServerConfigurationManager.Configuration.BaseUrl;
+            int baseUrlLen = baseUrl.Length;
+            if (baseUrlLen != 0)
+            {
+                if (path.StartsWith(baseUrl, StringComparison.OrdinalIgnoreCase))
+                {
+                    path = path.Slice(baseUrlLen);
+                }
+                else
                 {
-                    index++;
+                    // The path doesn't start with the base url,
+                    // how did we get here?
+                    ThrowInvalidDataException();
                 }
             }
 
-            return pathInfo[index];
-        }
+            // Remove leading /
+            path = path.Slice(1);
 
-        private static string[] Parse(string pathUri)
-        {
-            var actionParts = pathUri.Split(new[] { "://" }, StringSplitOptions.None);
+            // Backwards compatibility
+            const string Emby = "emby/";
+            if (path.StartsWith(Emby, StringComparison.OrdinalIgnoreCase))
+            {
+                path = path.Slice(Emby.Length);
+            }
 
-            var pathInfo = actionParts[actionParts.Length - 1];
+            const string MediaBrowser = "mediabrowser/";
+            if (path.StartsWith(MediaBrowser, StringComparison.OrdinalIgnoreCase))
+            {
+                path = path.Slice(MediaBrowser.Length);
+            }
 
-            var optionsPos = pathInfo.LastIndexOf('?');
-            if (optionsPos != -1)
+            // Skip segments until we are at the right index
+            for (int i = 0; i < index; i++)
             {
-                pathInfo = pathInfo.Substring(0, optionsPos);
+                pos = path.IndexOf('/');
+                if (pos == -1)
+                {
+                    ThrowIndexOutOfRangeException();
+                }
+
+                path = path.Slice(pos + 1);
             }
 
-            var args = pathInfo.Split('/');
+            // Remove the rest
+            pos = path.IndexOf('/');
+            if (pos != -1)
+            {
+                path = path.Slice(0, pos);
+            }
 
-            return args.Skip(1).ToArray();
+            return path;
         }
 
         /// <summary>