Added cache breaking based on hash rather than version

src/NzbDrone.Api/Frontend/CacheableSpecification.cs

@@ -19,7 +19,7 @@ namespace NzbDrone.Api.Frontend
                 return false;
             }
 
-            if (context.Request.Query.v == BuildInfo.Version) return true;
+            if (((DynamicDictionary)context.Request.Query).ContainsKey("h")) return true;
 
             if (context.Request.Path.StartsWith("/api", StringComparison.CurrentCultureIgnoreCase))
             {

src/NzbDrone.Api/Frontend/Mappers/BackupFileMapper.cs

@@ -16,7 +16,7 @@ namespace NzbDrone.Api.Frontend.Mappers
             _appFolderInfo = appFolderInfo;
         }
 
-        protected override string Map(string resourceUrl)
+        public override string Map(string resourceUrl)
         {
             var path = resourceUrl.Replace("/backup/", "").Replace('/', Path.DirectorySeparatorChar);
 

src/NzbDrone.Api/Frontend/Mappers/CacheBreakerProvider.cs

@@ -0,0 +1,43 @@
+using System.Collections.Generic;
+using System.Linq;
+using NzbDrone.Common.Crypto;
+using NzbDrone.Common.Extensions;
+
+namespace NzbDrone.Api.Frontend.Mappers
+{
+    public interface ICacheBreakerProvider
+    {
+        string AddCacheBreakerToPath(string resourceUrl);
+    }
+
+    public class CacheBreakerProvider : ICacheBreakerProvider
+    {
+        private readonly IEnumerable<IMapHttpRequestsToDisk> _diskMappers;
+        private readonly IHashProvider _hashProvider;
+
+        public CacheBreakerProvider(IEnumerable<IMapHttpRequestsToDisk> diskMappers, IHashProvider hashProvider)
+        {
+            _diskMappers = diskMappers;
+            _hashProvider = hashProvider;
+        }
+
+        public string AddCacheBreakerToPath(string resourceUrl)
+        {
+            if (!ShouldBreakCache(resourceUrl))
+            {
+                return resourceUrl;
+            }
+
+            var mapper = _diskMappers.Single(m => m.CanHandle(resourceUrl));
+            var pathToFile = mapper.Map(resourceUrl);
+            var hash = _hashProvider.ComputeMd5(pathToFile).ToBase64();
+
+            return resourceUrl + "?h=" + hash;
+        }
+
+        private static bool ShouldBreakCache(string path)
+        {
+            return !path.EndsWith(".ics") && !path.EndsWith("main");
+        }
+    }
+}

src/NzbDrone.Api/Frontend/Mappers/FaviconMapper.cs

@@ -15,7 +15,7 @@ namespace NzbDrone.Api.Frontend.Mappers
             _appFolderInfo = appFolderInfo;
         }
 
-        protected override string Map(string resourceUrl)
+        public override string Map(string resourceUrl)
         {
             var path = Path.Combine("Content", "Images", "favicon.ico");
 

src/NzbDrone.Api/Frontend/Mappers/IMapHttpRequestsToDisk.cs

@@ -5,6 +5,7 @@ namespace NzbDrone.Api.Frontend.Mappers
 {
     public interface IMapHttpRequestsToDisk
     {
+        string Map(string resourceUrl);
         bool CanHandle(string resourceUrl);
         Response GetResponse(string resourceUrl);
     }

src/NzbDrone.Api/Frontend/Mappers/IndexHtmlMapper.cs

@@ -1,5 +1,6 @@
 using System;
 using System.IO;
+using System.Runtime.InteropServices;
 using System.Text.RegularExpressions;
 using Nancy;
 using NLog;
@@ -12,26 +13,31 @@ namespace NzbDrone.Api.Frontend.Mappers
     public class IndexHtmlMapper : StaticResourceMapperBase
     {
         private readonly IDiskProvider _diskProvider;
+        private readonly Func<ICacheBreakerProvider> _cacheBreakProviderFactory;
         private readonly string _indexPath;
         private static readonly Regex ReplaceRegex = new Regex("(?<=(?:href|src|data-main)=\").*?(?=\")", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private static String API_KEY;
         private static String URL_BASE;
+        private string _generatedContent
+            ;
 
         public IndexHtmlMapper(IAppFolderInfo appFolderInfo,
                                IDiskProvider diskProvider,
                                IConfigFileProvider configFileProvider,
+                               Func<ICacheBreakerProvider> cacheBreakProviderFactory,
                                Logger logger)
             : base(diskProvider, logger)
         {
             _diskProvider = diskProvider;
+            _cacheBreakProviderFactory = cacheBreakProviderFactory;
             _indexPath = Path.Combine(appFolderInfo.StartUpFolder, "UI", "index.html");
 
             API_KEY = configFileProvider.ApiKey;
             URL_BASE = configFileProvider.UrlBase;
         }
 
-        protected override string Map(string resourceUrl)
+        public override string Map(string resourceUrl)
         {
             return _indexPath;
         }
@@ -54,28 +60,31 @@ namespace NzbDrone.Api.Frontend.Mappers
             var text = GetIndexText();
 
             var stream = new MemoryStream();
-            using (var writer = new StreamWriter(stream))
+            var writer = new StreamWriter(stream);
-            {
             writer.Write(text);
             writer.Flush();
-            }
             stream.Position = 0;
             return stream;
         }
 
         private string GetIndexText()
         {
-            var text = _diskProvider.ReadAllText(_indexPath);
+            if (RuntimeInfoBase.IsProduction && _generatedContent != null)
+            {
+                return _generatedContent;
+            }
+
+            _generatedContent = _diskProvider.ReadAllText(_indexPath);
+
+            var cacheBreakProvider = _cacheBreakProviderFactory();
 
-            text = ReplaceRegex.Replace(text, match => URL_BASE + match.Value);
+            _generatedContent = ReplaceRegex.Replace(_generatedContent, match => cacheBreakProvider.AddCacheBreakerToPath(URL_BASE + match.Value));
 
-            text = text.Replace(".css", ".css?v=" + BuildInfo.Version);
+            _generatedContent = _generatedContent.Replace("API_ROOT", URL_BASE + "/api");
-            text = text.Replace(".js", ".js?v=" + BuildInfo.Version);
+            _generatedContent = _generatedContent.Replace("API_KEY", API_KEY);
-            text = text.Replace("API_ROOT", URL_BASE + "/api");
+            _generatedContent = _generatedContent.Replace("APP_VERSION", BuildInfo.Version.ToString());
-            text = text.Replace("API_KEY", API_KEY);
-            text = text.Replace("APP_VERSION", BuildInfo.Version.ToString());
 
-            return text;
+            return _generatedContent;
         }
     }
 }

src/NzbDrone.Api/Frontend/Mappers/LogFileMapper.cs

@@ -16,7 +16,7 @@ namespace NzbDrone.Api.Frontend.Mappers
             _appFolderInfo = appFolderInfo;
         }
 
-        protected override string Map(string resourceUrl)
+        public override string Map(string resourceUrl)
         {
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = Path.GetFileName(path);

src/NzbDrone.Api/Frontend/Mappers/MediaCoverMapper.cs

@@ -16,7 +16,7 @@ namespace NzbDrone.Api.Frontend.Mappers
             _appFolderInfo = appFolderInfo;
         }
 
-        protected override string Map(string resourceUrl)
+        public override string Map(string resourceUrl)
         {
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = path.Trim(Path.DirectorySeparatorChar);

src/NzbDrone.Api/Frontend/Mappers/StaticResourceMapper.cs

@@ -15,7 +15,7 @@ namespace NzbDrone.Api.Frontend.Mappers
             _appFolderInfo = appFolderInfo;
         }
 
-        protected override string Map(string resourceUrl)
+        public override string Map(string resourceUrl)
         {
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = path.Trim(Path.DirectorySeparatorChar);

src/NzbDrone.Api/Frontend/Mappers/StaticResourceMapperBase.cs

@@ -27,7 +27,7 @@ namespace NzbDrone.Api.Frontend.Mappers
             }
         }
 
-        protected abstract string Map(string resourceUrl);
+        public abstract string Map(string resourceUrl);
 
         public abstract bool CanHandle(string resourceUrl);
 

src/NzbDrone.Api/Frontend/Mappers/UpdateLogFileMapper.cs

@@ -16,7 +16,7 @@ namespace NzbDrone.Api.Frontend.Mappers
             _appFolderInfo = appFolderInfo;
         }
 
-        protected override string Map(string resourceUrl)
+        public override string Map(string resourceUrl)
         {
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = Path.GetFileName(path);

src/NzbDrone.Api/NzbDrone.Api.csproj

@@ -139,6 +139,7 @@
     <Compile Include="Extensions\RequestExtensions.cs" />
     <Compile Include="Frontend\CacheableSpecification.cs" />
     <Compile Include="Frontend\Mappers\BackupFileMapper.cs" />
+    <Compile Include="Frontend\Mappers\CacheBreakerProvider.cs" />
     <Compile Include="Frontend\Mappers\FaviconMapper.cs" />
     <Compile Include="Frontend\Mappers\IMapHttpRequestsToDisk.cs" />
     <Compile Include="Frontend\Mappers\IndexHtmlMapper.cs" />

src/NzbDrone.Common/Crypto/HashProvider.cs

@@ -3,16 +3,21 @@ using NzbDrone.Common.Disk;
 
 namespace NzbDrone.Common.Crypto
 {
-    public class Md5HashProvider
+    public interface IHashProvider
+    {
+        byte[] ComputeMd5(string path);
+    }
+
+    public class HashProvider : IHashProvider
     {
         private readonly IDiskProvider _diskProvider;
 
-        public Md5HashProvider(IDiskProvider diskProvider)
+        public HashProvider(IDiskProvider diskProvider)
         {
             _diskProvider = diskProvider;
         }
 
-        public byte[] ComputeHash(string path)
+        public byte[] ComputeMd5(string path)
         {
             using (var md5 = MD5.Create())
             {

src/NzbDrone.Common/NzbDrone.Common.csproj

@@ -73,7 +73,7 @@
     <Compile Include="Composition\IContainer.cs" />
     <Compile Include="ConsoleService.cs" />
     <Compile Include="ConvertBase32.cs" />
-    <Compile Include="Crypto\Md5HashProvider.cs" />
+    <Compile Include="Crypto\HashProvider.cs" />
     <Compile Include="DictionaryExtensions.cs" />
     <Compile Include="Disk\DiskProviderBase.cs" />
     <Compile Include="Disk\IDiskProvider.cs" />

src/UI/index.html

@@ -23,11 +23,11 @@
     <link href="/Content/update.css" rel='stylesheet' type='text/css'/>
     <link href="/Content/overrides.css" rel='stylesheet' type='text/css'/>
 
-    <link rel="apple-touch-icon" href="/Content/Images/touch/57.png?v=2"/>
+    <link rel="apple-touch-icon" href="/Content/Images/touch/57.png"/>
-    <link rel="apple-touch-icon" sizes="72x72" href="/Content/Images/touch/72.png?v=2"/>
+    <link rel="apple-touch-icon" sizes="72x72" href="/Content/Images/touch/72.png"/>
-    <link rel="apple-touch-icon" sizes="114x114" href="/Content/Images/touch/114.png?v=2"/>
+    <link rel="apple-touch-icon" sizes="114x114" href="/Content/Images/touch/114.png"/>
-    <link rel="apple-touch-icon" sizes="144x144" href="/Content/Images/touch/144.png?v=2"/>
+    <link rel="apple-touch-icon" sizes="144x144" href="/Content/Images/touch/144.png"/>
-    <link rel="icon" type="image/ico" href="/Content/Images/favicon.ico?v=2"/>
+    <link rel="icon" type="image/ico" href="/Content/Images/favicon.ico"/>
 	
     <link rel="alternate" type="text/calendar" title="iCalendar feed for NzbDrone" href="/feed/calendar/NzbDrone.ics" />
 </head>