Fixed: Redirect calls missing URL Base

src/NzbDrone.Api/Extensions/Pipelines/UrlBasePipeline.cs

@@ -0,0 +1,46 @@
+using System;
+using Nancy;
+using Nancy.Bootstrapper;
+using Nancy.Responses;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Core.Configuration;
+
+namespace NzbDrone.Api.Extensions.Pipelines
+{
+    public class UrlBasePipeline : IRegisterNancyPipeline
+    {
+        private readonly string _urlBase;
+
+        public UrlBasePipeline(IConfigFileProvider configFileProvider)
+        {
+            _urlBase = configFileProvider.UrlBase;
+        }
+
+        public int Order => 99;
+
+        public void Register(IPipelines pipelines)
+        {
+            if (_urlBase.IsNotNullOrWhiteSpace())
+            {
+                pipelines.BeforeRequest.AddItemToStartOfPipeline((Func<NancyContext, Response>) Handle);
+            }
+        }
+
+        private Response Handle(NancyContext context)
+        {
+            var basePath = context.Request.Url.BasePath;
+
+            if (basePath.IsNullOrWhiteSpace())
+            {
+                return new RedirectResponse($"{_urlBase}{context.Request.Path}{context.Request.Url.Query}");
+            }
+
+            if (_urlBase != basePath)
+            {
+                return new NotFoundResponse();
+            }
+
+            return null;
+        }
+    }
+}

src/NzbDrone.Api/Frontend/StaticResourceModule.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using Nancy.Responses;
@@ -38,20 +38,6 @@ private Response Index()
                 return new NotFoundResponse();
             }
 
-            //Redirect to the subfolder if the request went to the base URL
-            if (path.Equals("/"))
-            {
-                var urlBase = _configFileProvider.UrlBase;
-
-                if (!string.IsNullOrEmpty(urlBase))
-                {
-                    if (Request.Url.BasePath != urlBase)
-                    {
-                        return new RedirectResponse(urlBase  + "/");
-                    }
-                }
-            }
-
             var mapper = _requestMappers.SingleOrDefault(m => m.CanHandle(path));
 
             if (mapper != null)

src/NzbDrone.Api/NzbDrone.Api.csproj

@@ -106,6 +106,7 @@
     <Compile Include="Commands\CommandResource.cs" />
     <Compile Include="Extensions\AccessControlHeaders.cs" />
     <Compile Include="Extensions\Pipelines\CorsPipeline.cs" />
+    <Compile Include="Extensions\Pipelines\UrlBasePipeline.cs" />
     <Compile Include="Extensions\Pipelines\RequestLoggingPipeline.cs" />
     <Compile Include="Frontend\Mappers\LoginHtmlMapper.cs" />
     <Compile Include="Frontend\Mappers\RobotsTxtMapper.cs" />