Adds a setting-option to add swagger plugins.

src/NSwag.AspNet.Owin/SwaggerUi/index.html

@@ -17,6 +17,8 @@
 
     <script src="./swagger-ui-bundle.js" charset="UTF-8"> </script>
     <script src="./swagger-ui-standalone-preset.js" charset="UTF-8"> </script>
+
+    {PluginScripts}
     <script>
 window.onload = function() {
   var url = window.location.search.match(/url=([^&]+)/);
@@ -60,6 +62,7 @@
     plugins: [
         SwaggerUIBundle.plugins.DownloadUrl,
         disableTryItOutPlugin
+        {AdditionalPlugins}
     ],
     layout: "StandaloneLayout"
   });

src/NSwag.AspNetCore/ReDocSettings.cs

@@ -44,7 +44,7 @@ internal override Task<string> TransformHtmlAsync(string html, HttpRequest reque
         {
             html = html.Replace("{AdditionalSettings}", GenerateAdditionalSettings(AdditionalSettings));
             html = html.Replace("{CustomStyle}", GetCustomStyleHtml(request));
-            html = html.Replace("{CustomScript}", GetCustomScriptHtml(request));
+            html = html.Replace("{CustomScript}", GetCustomScriptHtml(CustomJavaScriptPath, request));
             html = html.Replace("{DocumentTitle}", DocumentTitle);
             return Task.FromResult(html);
         }

src/NSwag.AspNetCore/SwaggerUi/index.html

@@ -17,6 +17,9 @@
 
     <script src="./swagger-ui-bundle.js" charset="UTF-8"> </script>
     <script src="./swagger-ui-standalone-preset.js" charset="UTF-8"> </script>
+
+    {PluginScripts}
+
     <script>
 window.onload = function() {
   var url = window.location.search.match(/url=([^&]+)/);
@@ -59,7 +62,8 @@
     ],
     plugins: [
         SwaggerUIBundle.plugins.DownloadUrl,
-        disableTryItOutPlugin
+        disableTryItOutPlugin 
+        {AdditionalPlugins}
     ],
     layout: "StandaloneLayout"
   });

src/NSwag.AspNetCore/SwaggerUiSettings.cs

@@ -1,4 +1,4 @@
-//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
 // <copyright file="SwaggerUiOwinSettings.cs" company="NSwag">
 //     Copyright (c) Rico Suter. All rights reserved.
 // </copyright>
@@ -179,9 +179,12 @@ internal override async Task<string> TransformHtmlAsync(string html, HttpRequest
                           "/oauth2-redirect.html\""
                         : "\"" + ServerUrl + TransformToExternalPath(Path, request) + "/oauth2-redirect.html\"")
                 .Replace("{CustomStyle}", GetCustomStyleHtml(request))
-                .Replace("{CustomScript}", GetCustomScriptHtml(request))
+                .Replace("{CustomScript}", GetCustomScriptHtml(CustomJavaScriptPath,request))
                 .Replace("{CustomHeadContent}", CustomHeadContent)
-                .Replace("{DocumentTitle}", DocumentTitle);
+                .Replace("{DocumentTitle}", DocumentTitle)
+                .Replace("{AdditionalPlugins}", GeneratePluginsList(AdditionalPlugins.Keys.ToArray()))
+                .Replace("{PluginScripts}", GetCustomScripts(AdditionalPlugins.Values.ToArray(), request));
+
 
             return htmlBuilder.ToString();
         }

src/NSwag.AspNetCore/SwaggerUiSettingsBase.cs

@@ -16,6 +16,8 @@
 using System.Text;
 using System.Threading.Tasks;
 using System.Threading;
+using System.Runtime.CompilerServices;
+
 #if AspNetOwin
 using Microsoft.Owin;
 
@@ -57,6 +59,9 @@ public SwaggerUiSettingsBase()
         /// <summary>Gets or sets a URI to load a custom JavaScript file into the index.html.</summary>
         public string CustomJavaScriptPath { get; set; }
 
+        /// <summary>Gets the additional Swagger UI plugins settings. Add key-value-paris that represent the plugin object name as key and plugin sript path as value.</summary>
+        public Dictionary<string,string> AdditionalPlugins { get; } = new Dictionary<string, string>();
+
         /// <summary>Gets or sets a flag that indicates to use or not type="module" in a custom script tag (default: false).</summary>
         public bool UseModuleTypeForCustomJavaScript { get; set; }
 
@@ -99,26 +104,46 @@ protected string GetCustomStyleHtml(HttpRequest request)
         /// Gets an HTML snippet for including custom JavaScript in swagger UI.
         /// </summary>
 #if AspNetOwin
-        protected string GetCustomScriptHtml(IOwinRequest request)
+        protected string GetCustomScriptHtml(string scriptPath, IOwinRequest request)
 #else
-        protected string GetCustomScriptHtml(HttpRequest request)
+        protected string GetCustomScriptHtml(string scriptPath, HttpRequest request)
 #endif
         {
-            if (CustomJavaScriptPath == null)
-            {
-                return string.Empty;
-            }
-
             var scriptType = string.Empty;
             if (UseModuleTypeForCustomJavaScript)
             {
                 scriptType = "type=\"module\"";
             }
 
-            var uriString = System.Net.WebUtility.HtmlEncode(TransformToExternalPath(CustomJavaScriptPath, request));
+            var uriString = System.Net.WebUtility.HtmlEncode(TransformToExternalPath(scriptPath, request));
             return $"<script {scriptType} src=\"{uriString}\"></script>";
         }
 
+        /// <summary>
+        /// Gets an HTML snippet for including custom JavaScript in swagger UI.
+        /// </summary>
+#if AspNetOwin
+        protected string GetCustomScripts(string[] scriptPaths, IOwinRequest request)
+#else
+        protected string GetCustomScripts(string[] scriptPaths, HttpRequest request)
+#endif
+        {
+            if ((scriptPaths == null )|| (scriptPaths.Count()==0))
+            {
+                return string.Empty;
+            }
+
+            var builder = new StringBuilder();    
+            foreach (var path in scriptPaths)
+            {
+                var scriptTag = GetCustomScriptHtml(path, request);
+                builder.Append(scriptTag + "\n          ");
+            }
+
+            return builder.ToString();
+        }
+
+
         /// <summary>Generates the additional objects JavaScript code.</summary>
         /// <param name="additionalSettings">The additional settings.</param>
         /// <returns>The code.</returns>
@@ -132,5 +157,21 @@ protected string GenerateAdditionalSettings(IDictionary<string, object> addition
 
             return code;
         }
+
+        /// <summary>
+        /// Generates the JavaScript plugins object to inset into the html.
+        /// </summary>
+        /// <param name="pluginsList"></param>
+        /// <returns></returns>
+        protected string GeneratePluginsList(string[] pluginsList)
+        {
+            var builder = new StringBuilder();
+            foreach (var plugin in pluginsList)
+            {
+                builder.Append(",\n   ");
+                builder.Append(plugin);
+            }
+            return builder.ToString();
+        }
     }
 }