From 6cee554760efea908da4d57d5555ad977c97dd86 Mon Sep 17 00:00:00 2001
From: Qstick <qstick@gmail.com>
Date: Thu, 3 May 2018 21:50:27 -0400
Subject: [PATCH] Fixed: Fix caching spec for Initialize.js

---
 .../Frontend/CacheableSpecification.cs        |  3 +-
 .../Frontend/InitializeJsModule.cs            | 46 ++++++++++++++-----
 2 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/src/Lidarr.Http/Frontend/CacheableSpecification.cs b/src/Lidarr.Http/Frontend/CacheableSpecification.cs
index 7d934530f..0d85374d2 100644
--- a/src/Lidarr.Http/Frontend/CacheableSpecification.cs
+++ b/src/Lidarr.Http/Frontend/CacheableSpecification.cs
@@ -30,6 +30,7 @@ public bool IsCacheable(NancyContext context)
 
             if (context.Request.Path.StartsWith("/signalr", StringComparison.CurrentCultureIgnoreCase)) return false;
             if (context.Request.Path.EndsWith("index.js")) return false;
+            if (context.Request.Path.EndsWith("initialize.js")) return false;
             if (context.Request.Path.StartsWith("/feed", StringComparison.CurrentCultureIgnoreCase)) return false;
 
             if (context.Request.Path.StartsWith("/log", StringComparison.CurrentCultureIgnoreCase) &&
@@ -46,4 +47,4 @@ public bool IsCacheable(NancyContext context)
             return true;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/Lidarr.Http/Frontend/InitializeJsModule.cs b/src/Lidarr.Http/Frontend/InitializeJsModule.cs
index 279b12d6b..b9595ca99 100644
--- a/src/Lidarr.Http/Frontend/InitializeJsModule.cs
+++ b/src/Lidarr.Http/Frontend/InitializeJsModule.cs
@@ -1,4 +1,5 @@
 using System.IO;
+using System.Text;
 using Nancy;
 using Nancy.Responses;
 using NzbDrone.Common.EnvironmentInfo;
@@ -12,6 +13,10 @@ public class InitializeJsModule : NancyModule
         private readonly IConfigFileProvider _configFileProvider;
         private readonly IAnalyticsService _analyticsService;
 
+        private static string _apiKey;
+        private static string _urlBase;
+        private string _generatedContent;
+
 
         public InitializeJsModule(IConfigFileProvider configFileProvider,
                                   IAnalyticsService analyticsService)
@@ -19,6 +24,9 @@ public InitializeJsModule(IConfigFileProvider configFileProvider,
             _configFileProvider = configFileProvider;
             _analyticsService = analyticsService;
 
+            _apiKey = configFileProvider.ApiKey;
+            _urlBase = configFileProvider.UrlBase;
+
             Get["/initialize.js"] = x => Index();
         }
 
@@ -30,25 +38,41 @@ private Response Index()
 
         private Stream GetContentStream()
         {
-            var urlBase = _configFileProvider.UrlBase;
+            var text = GetContent();
+
             var stream = new MemoryStream();
             var writer = new StreamWriter(stream);
 
-            writer.WriteLine("window.Lidarr = {");
-            writer.WriteLine($"  apiRoot: '{urlBase}/api/v1',");
-            writer.WriteLine($"  apiKey: '{_configFileProvider.ApiKey}',");
-            writer.WriteLine($"  release: '{BuildInfo.Release}',");
-            writer.WriteLine($"  version: '{BuildInfo.Version.ToString()}',");
-            writer.WriteLine($"  branch: '{_configFileProvider.Branch.ToLower()}',");
-            writer.WriteLine($"  analytics: {_analyticsService.IsEnabled.ToString().ToLowerInvariant()},");
-            writer.WriteLine($"  urlBase: '{urlBase}',");
-            writer.WriteLine($"  isProduction: {RuntimeInfo.IsProduction.ToString().ToLowerInvariant()}");
-            writer.WriteLine("};");
 
+            writer.Write(text);
             writer.Flush();
             stream.Position = 0;
 
             return stream;
         }
+
+        private string GetContent()
+        {
+            if (RuntimeInfo.IsProduction && _generatedContent != null)
+            {
+                return _generatedContent;
+            }
+
+            var builder = new StringBuilder();
+            builder.AppendLine("window.Lidarr = {");
+            builder.AppendLine($"  apiRoot: '{_urlBase}/api/v1',");
+            builder.AppendLine($"  apiKey: '{_apiKey}',");
+            builder.AppendLine($"  release: '{BuildInfo.Release}',");
+            builder.AppendLine($"  version: '{BuildInfo.Version.ToString()}',");
+            builder.AppendLine($"  branch: '{_configFileProvider.Branch.ToLower()}',");
+            builder.AppendLine($"  analytics: {_analyticsService.IsEnabled.ToString().ToLowerInvariant()},");
+            builder.AppendLine($"  urlBase: '{_urlBase}',");
+            builder.AppendLine($"  isProduction: {RuntimeInfo.IsProduction.ToString().ToLowerInvariant()}");
+            builder.AppendLine("};");
+
+            _generatedContent = builder.ToString();
+
+            return _generatedContent;
+        }
     }
 }