Fix for hosting in subfolder.

src/Squidex/Areas/Frontend/Middlewares/IndexExtensions.cs

@@ -0,0 +1,30 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+using System;
+using Microsoft.AspNetCore.Http;
+
+namespace Squidex.Areas.Frontend.Middlewares
+{
+    public static class IndexExtensions
+    {
+        public static bool IsIndexHtml(this HttpContext context)
+        {
+            return context.IsIndex() && context.IsHtml();
+        }
+
+        public static bool IsIndex(this HttpContext context)
+        {
+            return context.Request.Path.Value.EndsWith("/index.html", StringComparison.OrdinalIgnoreCase);
+        }
+
+        public static bool IsHtml(this HttpContext context)
+        {
+            return context.Response.ContentType?.ToLower().Contains("text/html") == true;
+        }
+    }
+}

src/Squidex/Areas/Frontend/Middlewares/IndexMiddleware.cs

@@ -0,0 +1,66 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschränkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+using System.IO;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
+
+namespace Squidex.Areas.Frontend.Middlewares
+{
+    public sealed class IndexMiddleware
+    {
+        private readonly RequestDelegate next;
+
+        public IndexMiddleware(RequestDelegate next)
+        {
+            this.next = next;
+        }
+
+        public async Task Invoke(HttpContext context)
+        {
+            var basePath = context.Request.PathBase;
+
+            if (context.IsIndex() && basePath.HasValue)
+            {
+                var responseBuffer = new MemoryStream();
+                var responseBody = context.Response.Body;
+
+                context.Response.Body = responseBuffer;
+
+                await next(context);
+
+                context.Response.Body = responseBody;
+
+                if (context.Response.StatusCode == 200 && context.IsIndexHtml())
+                {
+                    var response = Encoding.UTF8.GetString(responseBuffer.ToArray());
+
+                    response = AdjustBase(response, basePath);
+
+                    context.Response.ContentLength = Encoding.UTF8.GetByteCount(response);
+                    context.Response.Body = responseBody;
+
+                    await context.Response.WriteAsync(response);
+                }
+                else if (context.Response.StatusCode != 304)
+                {
+                    await responseBuffer.CopyToAsync(responseBody);
+                }
+            }
+            else
+            {
+                await next(context);
+            }
+        }
+
+        private static string AdjustBase(string response, string baseUrl)
+        {
+            return response.Replace("<base href=\"/\">", $"<base href=\"{baseUrl}/\">");
+        }
+    }
+}

src/Squidex/Areas/Frontend/Middlewares/WebpackMiddleware.cs

@@ -10,7 +10,6 @@ using System.IO;
 using System.Text;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
-using Microsoft.Net.Http.Headers;
 
 namespace Squidex.Areas.Frontend.Middlewares
 {
@@ -29,46 +28,38 @@ namespace Squidex.Areas.Frontend.Middlewares
 
         public async Task Invoke(HttpContext context)
         {
-            var responseBuffer = new MemoryStream();
-            var responseBody = context.Response.Body;
+            if (context.IsIndex())
+            {
+                var responseBuffer = new MemoryStream();
+                var responseBody = context.Response.Body;
 
-            context.Response.Body = responseBuffer;
+                context.Response.Body = responseBuffer;
 
-            await next(context);
+                await next(context);
 
-            responseBuffer.Seek(0, SeekOrigin.Begin);
+                context.Response.Body = responseBody;
 
-            if (context.Response.StatusCode == 200 && IsIndex(context) && IsHtml(context))
-            {
-                using (var reader = new StreamReader(responseBuffer))
+                if (context.Response.StatusCode == 200 && context.IsIndexHtml())
                 {
-                    var response = await reader.ReadToEndAsync();
+                    var response = Encoding.UTF8.GetString(responseBuffer.ToArray());
 
                     response = InjectStyles(response);
                     response = InjectScripts(response);
 
-                    using (var memoryStream = new MemoryStream())
-                    {
-                        using (var writer = new StreamWriter(memoryStream))
-                        {
-                            writer.Write(response);
-                            writer.Flush();
-
-                            memoryStream.Seek(0, SeekOrigin.Begin);
-
-                            context.Response.Headers[HeaderNames.ContentLength] = memoryStream.Length.ToString();
+                    context.Response.ContentLength = Encoding.UTF8.GetByteCount(response);
+                    context.Response.Body = responseBody;
 
-                            await memoryStream.CopyToAsync(responseBody);
-                        }
-                    }
+                    await context.Response.WriteAsync(response);
+                }
+                else if (context.Response.StatusCode != 304)
+                {
+                    await responseBuffer.CopyToAsync(responseBody);
                 }
             }
-            else if (context.Response.StatusCode != 304)
+            else
             {
-                await responseBuffer.CopyToAsync(responseBody);
+                await next(context);
             }
-
-            context.Response.Body = responseBody;
         }
 
         private static string InjectStyles(string response)
@@ -108,15 +99,5 @@ namespace Squidex.Areas.Frontend.Middlewares
 
             return response;
         }
-
-        private static bool IsIndex(HttpContext context)
-        {
-            return context.Request.Path.Value.Equals("/index.html", StringComparison.OrdinalIgnoreCase);
-        }
-
-        private static bool IsHtml(HttpContext context)
-        {
-            return context.Response.ContentType?.ToLower().Contains("text/html") == true;
-        }
     }
 }

src/Squidex/Areas/Frontend/Startup.cs

@@ -23,10 +23,7 @@ namespace Squidex.Areas.Frontend
         {
             var environment = app.ApplicationServices.GetRequiredService<IHostingEnvironment>();
 
-            if (environment.IsDevelopment())
-            {
-                app.UseMiddleware<WebpackMiddleware>();
-            }
+            app.UseMiddleware<SquidMiddleware>();
 
             app.Use((context, next) =>
             {
@@ -53,7 +50,14 @@ namespace Squidex.Areas.Frontend
                 return next();
             });
 
-            app.UseMiddleware<SquidMiddleware>();
+            if (environment.IsDevelopment())
+            {
+                app.UseMiddleware<WebpackMiddleware>();
+            }
+            else
+            {
+                app.UseMiddleware<IndexMiddleware>();
+            }
 
             app.UseStaticFiles(new StaticFileOptions
             {

src/Squidex/app-config/webpack.config.js

@@ -83,7 +83,11 @@ module.exports = {
         }, {
             test: /\.(woff|woff2|ttf|eot)(\?.*$|$)/,
             use: [{
-                loader: 'file-loader?name=assets/[name].[hash].[ext]'
+                loader: 'file-loader?name=assets/[name].[hash].[ext]',
+                options: {
+                    publicPath: 'assets/',
+                    outputPath: 'assets'
+                }
             }]
         }, {
             test: /\.(png|jpe?g|gif|svg|ico)(\?.*$|$)/,

src/Squidex/app-config/webpack.run.prod.js

@@ -30,7 +30,7 @@ module.exports = webpackMerge(runConfig, {
          */
         path: helpers.root('wwwroot/build/'),
 
-        publicPath: '/build/',
+        publicPath: './build/',
 
         /**
          * Specifies the name of each output file on disk.

src/Squidex/wwwroot/index.html

@@ -41,7 +41,7 @@
 <body>
     <sqx-app>
         <div class="loading">
-            <img src="/images/loader.gif" />
+            <img src="./images/loader.gif" />
 
             <div>Loading Squidex</div>
         </div>