Update browserlist db

(cherry picked from commit 31c7647eacb3c3a50e55550880287e00302a9881)

.github/workflows/close_invalid_issues.yml

@@ -0,0 +1,26 @@
+name: Close issues without labels
+
+on:
+  issues:
+    types:
+      - opened
+      - reopened
+
+jobs:
+  close-issue:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+        with:
+          sparse-checkout: |
+            .github
+      - name: Close issue if no labels found
+        if: join(github.event.issue.labels) == ''
+        run: |
+          gh issue comment ${{ github.event.issue.number }} --body ":wave: @${{ github.event.issue.user.login }}, this issue was closed automatically because it was created without following an issue template. Please update the issue following the correct template for this issue. Once updated please reply to this issue so we can review and re-open. In the future, use the [issue templates](https://github.com/${{ github.repository }}/issues/new/choose) instead of creating your own."
+          gh issue close ${{ github.event.issue.number }} --reason "not planned"
+        env:
+          GH_TOKEN: ${{ github.token }}

frontend/build/webpack.config.js

@@ -133,6 +133,12 @@ module.exports = (env) => {
               {
                 source: 'frontend/src/Content/robots.txt',
                 destination: path.join(distFolder, 'Content/robots.txt')
+              },
+
+              // manifest.json and browserconfig.xml
+              {
+                source: 'frontend/src/Content/*.(json|xml)',
+                destination: path.join(distFolder, 'Content')
               }
             ]
           }

frontend/src/Content/Images/Icons/browserconfig.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<browserconfig>
-    <msapplication>
-        <tile>
-            <square150x150logo src="/Content/Images/Icons/mstile-150x150.png"/>
-            <TileColor>#00ccff</TileColor>
-        </tile>
-    </msapplication>
-</browserconfig>

frontend/src/Content/Images/Icons/manifest.json

@@ -1,19 +0,0 @@
-{
-    "name": "Prowlarr",
-    "icons": [
-        {
-            "src": "android-chrome-192x192.png",
-            "sizes": "192x192",
-            "type": "image/png"
-        },
-        {
-            "src": "android-chrome-512x512.png",
-            "sizes": "512x512",
-            "type": "image/png"
-        }
-    ],
-    "start_url": "../../../../",
-    "theme_color": "#3a3f51",
-    "background_color": "#3a3f51",
-    "display": "standalone"
-}

frontend/src/Content/browserconfig.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+	<msapplication>
+		<tile>
+			<square150x150logo src="__URL_BASE__/Content/Images/Icons/mstile-150x150.png" />
+			<TileColor>
+				#00ccff
+			</TileColor>
+		</tile>
+	</msapplication>
+</browserconfig>

frontend/src/Content/manifest.json

@@ -0,0 +1,19 @@
+{
+  "name": "__INSTANCE_NAME__",
+  "icons": [
+    {
+      "src": "android-chrome-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "android-chrome-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  "start_url": "__URL_BASE__/",
+  "theme_color": "#3a3f51",
+  "background_color": "#3a3f51",
+  "display": "standalone"
+}

frontend/src/index.ejs

@@ -33,7 +33,7 @@
       sizes="16x16"
       href="/Content/Images/Icons/favicon-16x16.png"
     />
-    <link rel="manifest" href="/Content/Images/Icons/manifest.json" crossorigin="use-credentials" />
+    <link rel="manifest" href="/Content/manifest.json" crossorigin="use-credentials" />
     <link
       rel="mask-icon"
       href="/Content/Images/Icons/safari-pinned-tab.svg"
@@ -47,7 +47,7 @@
     />
     <meta
       name="msapplication-config"
-      content="/Content/Images/Icons/browserconfig.xml"
+      content="/Content/browserconfig.xml"
     />
 
     <link rel="stylesheet" type="text/css" href="/Content/Fonts/fonts.css">

frontend/src/login.html

@@ -11,8 +11,11 @@
     <!-- Android/Apple Phone -->
     <meta name="mobile-web-app-capable" content="yes" />
     <meta name="apple-mobile-web-app-capable" content="yes" />
-    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
-    <meta name="format-detection" content="telephone=no">
+    <meta
+      name="apple-mobile-web-app-status-bar-style"
+      content="black-translucent"
+    />
+    <meta name="format-detection" content="telephone=no" />
 
     <meta name="description" content="Prowlarr" />
 
@@ -33,7 +36,11 @@
       sizes="16x16"
       href="/Content/Images/Icons/favicon-16x16.png"
     />
-    <link rel="manifest" href="/Content/Images/Icons/manifest.json" crossorigin="use-credentials" />
+    <link
+      rel="manifest"
+      href="/Content/manifest.json"
+      crossorigin="use-credentials"
+    />
     <link
       rel="mask-icon"
       href="/Content/Images/Icons/safari-pinned-tab.svg"
@@ -45,10 +52,7 @@
       href="/favicon.ico"
       data-no-hash
     />
-    <meta
-      name="msapplication-config"
-      content="/Content/Images/Icons/browserconfig.xml"
-    />
+    <meta name="msapplication-config" content="/Content/browserconfig.xml" />
 
     <link rel="stylesheet" type="text/css" href="/Content/styles.css" />
     <link rel="stylesheet" type="text/css" href="/Content/Fonts/fonts.css" />
@@ -59,7 +63,7 @@
       body {
         background-color: var(--pageBackground);
         color: var(--textColor);
-        font-family: "Roboto", "open sans", "Helvetica Neue", Helvetica, Arial,
+        font-family: 'Roboto', 'open sans', 'Helvetica Neue', Helvetica, Arial,
           sans-serif;
       }
 
@@ -209,9 +213,7 @@
           </div>
 
           <div class="panel-body">
-            <div class="sign-in">
-              SIGN IN TO CONTINUE
-            </div>
+            <div class="sign-in">SIGN IN TO CONTINUE</div>
 
             <form
               role="form"
@@ -230,8 +232,8 @@
                   pattern=".{1,}"
                   required
                   title="User name is required"
-                  autoFocus="true"
-                  autoCapitalize="false"
+                  autofocus="true"
+                  autocapitalize="false"
                 />
               </div>
 
@@ -282,16 +284,16 @@
   </body>
 
   <script type="text/javascript">
-    var yearSpan = document.getElementById("year");
-    yearSpan.innerHTML = "2010-" + new Date().getFullYear();
+    var yearSpan = document.getElementById('year');
+    yearSpan.innerHTML = '2010-' + new Date().getFullYear();
 
-    var copyDiv = document.getElementById("copy");
-    copyDiv.classList.remove("hidden");
+    var copyDiv = document.getElementById('copy');
+    copyDiv.classList.remove('hidden');
 
-    if (window.location.search.indexOf("loginFailed=true") > -1) {
-      var loginFailedDiv = document.getElementById("login-failed");
+    if (window.location.search.indexOf('loginFailed=true') > -1) {
+      var loginFailedDiv = document.getElementById('login-failed');
 
-      loginFailedDiv.classList.remove("hidden");
+      loginFailedDiv.classList.remove('hidden');
     }
 
     var light = {
@@ -311,7 +313,7 @@
       primaryHoverBorderColor: '#3483e7',
       failedColor: '#f05050',
       forgotPasswordColor: '#909fa7',
-      forgotPasswordAltColor: '#748690'
+      forgotPasswordAltColor: '#748690',
     };
 
     var dark = {
@@ -331,21 +333,16 @@
       primaryHoverBorderColor: '#3483e7',
       failedColor: '#f05050',
       forgotPasswordColor: '#737d83',
-      forgotPasswordAltColor: '#546067'
+      forgotPasswordAltColor: '#546067',
     };
 
-    var theme = "_THEME_";
+    var theme = '_THEME_';
     var defaultDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
-    var finalTheme = theme === 'dark' || (theme === 'auto' && defaultDark) ?
-      dark :
-      light;
+    var finalTheme =
+      theme === 'dark' || (theme === 'auto' && defaultDark) ? dark : light;
 
     Object.entries(finalTheme).forEach(([key, value]) => {
-      document.documentElement.style.setProperty(
-        `--${key}`,
-        value
-      );
+      document.documentElement.style.setProperty(`--${key}`, value);
     });
-
   </script>
 </html>

src/Prowlarr.Http/Frontend/Mappers/BackupFileMapper.cs

@@ -15,11 +15,13 @@ namespace Prowlarr.Http.Frontend.Mappers
             _backupService = backupService;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => _backupService.GetBackupFolder().TrimEnd(Path.DirectorySeparatorChar);
+
+        protected override string MapPath(string resourceUrl)
         {
             var path = resourceUrl.Replace("/backup/", "").Replace('/', Path.DirectorySeparatorChar);
 
-            return Path.Combine(_backupService.GetBackupFolder(), path);
+            return Path.Combine(FolderPath, path);
         }
 
         public override bool CanHandle(string resourceUrl)

src/Prowlarr.Http/Frontend/Mappers/BrowserConfig.cs

@@ -1,4 +1,4 @@
-using System.IO;
+using System.IO;
 using NLog;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.EnvironmentInfo;
@@ -6,29 +6,29 @@ using NzbDrone.Core.Configuration;
 
 namespace Prowlarr.Http.Frontend.Mappers
 {
-    public class BrowserConfig : StaticResourceMapperBase
+    public class BrowserConfig : UrlBaseReplacementResourceMapperBase
     {
         private readonly IAppFolderInfo _appFolderInfo;
         private readonly IConfigFileProvider _configFileProvider;
 
         public BrowserConfig(IAppFolderInfo appFolderInfo, IDiskProvider diskProvider, IConfigFileProvider configFileProvider, Logger logger)
-            : base(diskProvider, logger)
+            : base(diskProvider, configFileProvider, logger)
         {
             _appFolderInfo = appFolderInfo;
             _configFileProvider = configFileProvider;
         }
 
-        public override string Map(string resourceUrl)
-        {
-            var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
-            path = path.Trim(Path.DirectorySeparatorChar);
+        protected override string FolderPath => Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder);
+        protected override string FilePath => Path.Combine(FolderPath, "Content", "browserconfig.xml");
 
-            return Path.ChangeExtension(Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder, path), "xml");
+        protected override string MapPath(string resourceUrl)
+        {
+            return FilePath;
         }
 
         public override bool CanHandle(string resourceUrl)
         {
-            return resourceUrl.StartsWith("/content/images/icons/browserconfig");
+            return resourceUrl.StartsWith("/Content/browserconfig");
         }
     }
 }

src/Prowlarr.Http/Frontend/Mappers/CacheBreakerProvider.cs

@@ -30,6 +30,12 @@ namespace Prowlarr.Http.Frontend.Mappers
 
             var mapper = _diskMappers.Single(m => m.CanHandle(resourceUrl));
             var pathToFile = mapper.Map(resourceUrl);
+
+            if (pathToFile == null)
+            {
+                return resourceUrl;
+            }
+
             var hash = _hashProvider.ComputeMd5(pathToFile).ToBase64();
 
             return resourceUrl + "?h=" + hash.Trim('=');

src/Prowlarr.Http/Frontend/Mappers/FaviconMapper.cs

@@ -18,7 +18,9 @@ namespace Prowlarr.Http.Frontend.Mappers
             _configFileProvider = configFileProvider;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder);
+
+        protected override string MapPath(string resourceUrl)
         {
             var fileName = "favicon.ico";
 
@@ -29,7 +31,7 @@ namespace Prowlarr.Http.Frontend.Mappers
 
             var path = Path.Combine("Content", "Images", "Icons", fileName);
 
-            return Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder, path);
+            return Path.Combine(FolderPath, path);
         }
 
         public override bool CanHandle(string resourceUrl)

src/Prowlarr.Http/Frontend/Mappers/HtmlMapperBase.cs

@@ -4,6 +4,7 @@ using System.Text.RegularExpressions;
 using NLog;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Core.Configuration;
 
 namespace Prowlarr.Http.Frontend.Mappers
 {
@@ -13,19 +14,22 @@ namespace Prowlarr.Http.Frontend.Mappers
         private readonly Lazy<ICacheBreakerProvider> _cacheBreakProviderFactory;
         private static readonly Regex ReplaceRegex = new Regex(@"(?:(?<attribute>href|src)=\"")(?<path>.*?(?<extension>css|js|png|ico|ics|svg|json))(?:\"")(?:\s(?<nohash>data-no-hash))?", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
+        private string _urlBase;
         private string _generatedContent;
 
         protected HtmlMapperBase(IDiskProvider diskProvider,
+                                 IConfigFileProvider configFileProvider,
                                  Lazy<ICacheBreakerProvider> cacheBreakProviderFactory,
                                  Logger logger)
             : base(diskProvider, logger)
         {
             _diskProvider = diskProvider;
             _cacheBreakProviderFactory = cacheBreakProviderFactory;
+
+            _urlBase = configFileProvider.UrlBase;
         }
 
-        protected string HtmlPath;
-        protected string UrlBase;
+        protected abstract string HtmlPath { get; }
 
         protected override Stream GetContentStream(string filePath)
         {
@@ -62,10 +66,10 @@ namespace Prowlarr.Http.Frontend.Mappers
                     url = cacheBreakProvider.AddCacheBreakerToPath(match.Groups["path"].Value);
                 }
 
-                return $"{match.Groups["attribute"].Value}=\"{UrlBase}{url}\"";
+                return $"{match.Groups["attribute"].Value}=\"{_urlBase}{url}\"";
             });
 
-            text = text.Replace("__URL_BASE__", UrlBase);
+            text = text.Replace("__URL_BASE__", _urlBase);
 
             _generatedContent = text;
 

src/Prowlarr.Http/Frontend/Mappers/IMapHttpRequestsToDisk.cs

@@ -7,6 +7,6 @@ namespace Prowlarr.Http.Frontend.Mappers
     {
         string Map(string resourceUrl);
         bool CanHandle(string resourceUrl);
-        Task<FileStreamResult> GetResponse(string resourceUrl);
+        Task<IActionResult> GetResponse(string resourceUrl);
     }
 }

src/Prowlarr.Http/Frontend/Mappers/IndexHtmlMapper.cs

@@ -9,6 +9,7 @@ namespace Prowlarr.Http.Frontend.Mappers
 {
     public class IndexHtmlMapper : HtmlMapperBase
     {
+        private readonly IAppFolderInfo _appFolderInfo;
         private readonly IConfigFileProvider _configFileProvider;
 
         public IndexHtmlMapper(IAppFolderInfo appFolderInfo,
@@ -16,15 +17,16 @@ namespace Prowlarr.Http.Frontend.Mappers
                                IConfigFileProvider configFileProvider,
                                Lazy<ICacheBreakerProvider> cacheBreakProviderFactory,
                                Logger logger)
-            : base(diskProvider, cacheBreakProviderFactory, logger)
+            : base(diskProvider, configFileProvider, cacheBreakProviderFactory, logger)
         {
+            _appFolderInfo = appFolderInfo;
             _configFileProvider = configFileProvider;
-
-            HtmlPath = Path.Combine(appFolderInfo.StartUpFolder, _configFileProvider.UiFolder, "index.html");
-            UrlBase = configFileProvider.UrlBase;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder);
+        protected override string HtmlPath => Path.Combine(FolderPath, "index.html");
+
+        protected override string MapPath(string resourceUrl)
         {
             return HtmlPath;
         }

src/Prowlarr.Http/Frontend/Mappers/LogFileMapper.cs

@@ -16,12 +16,14 @@ namespace Prowlarr.Http.Frontend.Mappers
             _appFolderInfo = appFolderInfo;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => _appFolderInfo.GetLogFolder();
+
+        protected override string MapPath(string resourceUrl)
         {
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = Path.GetFileName(path);
 
-            return Path.Combine(_appFolderInfo.GetLogFolder(), path);
+            return Path.Combine(FolderPath, path);
         }
 
         public override bool CanHandle(string resourceUrl)

src/Prowlarr.Http/Frontend/Mappers/LoginHtmlMapper.cs

@@ -9,6 +9,7 @@ namespace Prowlarr.Http.Frontend.Mappers
 {
     public class LoginHtmlMapper : HtmlMapperBase
     {
+        private readonly IAppFolderInfo _appFolderInfo;
         private readonly IConfigFileProvider _configFileProvider;
 
         public LoginHtmlMapper(IAppFolderInfo appFolderInfo,
@@ -16,14 +17,16 @@ namespace Prowlarr.Http.Frontend.Mappers
                                Lazy<ICacheBreakerProvider> cacheBreakProviderFactory,
                                IConfigFileProvider configFileProvider,
                                Logger logger)
-            : base(diskProvider, cacheBreakProviderFactory, logger)
+            : base(diskProvider, configFileProvider, cacheBreakProviderFactory, logger)
         {
+            _appFolderInfo = appFolderInfo;
             _configFileProvider = configFileProvider;
-            HtmlPath = Path.Combine(appFolderInfo.StartUpFolder, configFileProvider.UiFolder, "login.html");
-            UrlBase = configFileProvider.UrlBase;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder);
+        protected override string HtmlPath => Path.Combine(FolderPath, "login.html");
+
+        protected override string MapPath(string resourceUrl)
         {
             return HtmlPath;
         }

src/Prowlarr.Http/Frontend/Mappers/ManifestMapper.cs

@@ -1,4 +1,4 @@
-using System.IO;
+using System.IO;
 using NLog;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.EnvironmentInfo;
@@ -6,29 +6,47 @@ using NzbDrone.Core.Configuration;
 
 namespace Prowlarr.Http.Frontend.Mappers
 {
-    public class ManifestMapper : StaticResourceMapperBase
+    public class ManifestMapper : UrlBaseReplacementResourceMapperBase
     {
         private readonly IAppFolderInfo _appFolderInfo;
         private readonly IConfigFileProvider _configFileProvider;
 
+        private string _generatedContent;
+
         public ManifestMapper(IAppFolderInfo appFolderInfo, IDiskProvider diskProvider, IConfigFileProvider configFileProvider, Logger logger)
-            : base(diskProvider, logger)
+            : base(diskProvider, configFileProvider, logger)
         {
             _appFolderInfo = appFolderInfo;
             _configFileProvider = configFileProvider;
         }
 
-        public override string Map(string resourceUrl)
-        {
-            var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
-            path = path.Trim(Path.DirectorySeparatorChar);
+        protected override string FolderPath => Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder);
+        protected override string FilePath => Path.Combine(FolderPath, "Content", "manifest.json");
 
-            return Path.ChangeExtension(Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder, path), "json");
+        protected override string MapPath(string resourceUrl)
+        {
+            return FilePath;
         }
 
         public override bool CanHandle(string resourceUrl)
         {
-            return resourceUrl.StartsWith("/Content/Images/Icons/manifest");
+            return resourceUrl.StartsWith("/Content/manifest");
+        }
+
+        protected override string GetFileText()
+        {
+            if (RuntimeInfo.IsProduction && _generatedContent != null)
+            {
+                return _generatedContent;
+            }
+
+            var text = base.GetFileText();
+
+            text = text.Replace("__INSTANCE_NAME__", _configFileProvider.InstanceName);
+
+            _generatedContent = text;
+
+            return _generatedContent;
         }
     }
 }

src/Prowlarr.Http/Frontend/Mappers/MediaCoverMapper.cs

@@ -22,7 +22,9 @@ namespace Prowlarr.Http.Frontend.Mappers
             _diskProvider = diskProvider;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => Path.Combine(_appFolderInfo.GetAppDataPath(), "MediaCover");
+
+        protected override string MapPath(string resourceUrl)
         {
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = path.Trim(Path.DirectorySeparatorChar);

src/Prowlarr.Http/Frontend/Mappers/RobotsTxtMapper.cs

@@ -18,11 +18,13 @@ namespace Prowlarr.Http.Frontend.Mappers
             _configFileProvider = configFileProvider;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder);
+
+        protected override string MapPath(string resourceUrl)
         {
             var path = Path.Combine("Content", "robots.txt");
 
-            return Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder, path);
+            return Path.Combine(FolderPath, path);
         }
 
         public override bool CanHandle(string resourceUrl)

src/Prowlarr.Http/Frontend/Mappers/StaticResourceMapper.cs

@@ -18,20 +18,22 @@ namespace Prowlarr.Http.Frontend.Mappers
             _configFileProvider = configFileProvider;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder);
+
+        protected override string MapPath(string resourceUrl)
         {
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = path.Trim(Path.DirectorySeparatorChar);
 
-            return Path.Combine(_appFolderInfo.StartUpFolder, _configFileProvider.UiFolder, path);
+            return Path.Combine(FolderPath, path);
         }
 
         public override bool CanHandle(string resourceUrl)
         {
             resourceUrl = resourceUrl.ToLowerInvariant();
 
-            if (resourceUrl.StartsWith("/content/images/icons/manifest") ||
-                resourceUrl.StartsWith("/content/images/icons/browserconfig"))
+            if (resourceUrl.StartsWith("/content/manifest") ||
+                resourceUrl.StartsWith("/content/browserconfig"))
             {
                 return false;
             }

src/Prowlarr.Http/Frontend/Mappers/StaticResourceMapperBase.cs

@@ -27,14 +27,28 @@ namespace Prowlarr.Http.Frontend.Mappers
             _caseSensitive = RuntimeInfo.IsProduction ? DiskProviderBase.PathStringComparison : StringComparison.OrdinalIgnoreCase;
         }
 
-        public abstract string Map(string resourceUrl);
+        protected abstract string FolderPath { get; }
+        protected abstract string MapPath(string resourceUrl);
 
         public abstract bool CanHandle(string resourceUrl);
 
-        public Task<FileStreamResult> GetResponse(string resourceUrl)
+        public string Map(string resourceUrl)
+        {
+            var filePath = Path.GetFullPath(MapPath(resourceUrl));
+            var parentPath = Path.GetFullPath(FolderPath) + Path.DirectorySeparatorChar;
+
+            return filePath.StartsWith(parentPath) ? filePath : null;
+        }
+
+        public Task<IActionResult> GetResponse(string resourceUrl)
         {
             var filePath = Map(resourceUrl);
 
+            if (filePath == null)
+            {
+                return Task.FromResult<IActionResult>(null);
+            }
+
             if (_diskProvider.FileExists(filePath, _caseSensitive))
             {
                 if (!_mimeTypeProvider.TryGetContentType(filePath, out var contentType))
@@ -42,7 +56,7 @@ namespace Prowlarr.Http.Frontend.Mappers
                     contentType = "application/octet-stream";
                 }
 
-                return Task.FromResult(new FileStreamResult(GetContentStream(filePath), new MediaTypeHeaderValue(contentType)
+                return Task.FromResult<IActionResult>(new FileStreamResult(GetContentStream(filePath), new MediaTypeHeaderValue(contentType)
                 {
                     Encoding = contentType == "text/plain" ? Encoding.UTF8 : null
                 }));
@@ -50,7 +64,7 @@ namespace Prowlarr.Http.Frontend.Mappers
 
             _logger.Warn("File {0} not found", filePath);
 
-            return Task.FromResult<FileStreamResult>(null);
+            return Task.FromResult<IActionResult>(null);
         }
 
         protected virtual Stream GetContentStream(string filePath)

src/Prowlarr.Http/Frontend/Mappers/UpdateLogFileMapper.cs

@@ -16,12 +16,14 @@ namespace Prowlarr.Http.Frontend.Mappers
             _appFolderInfo = appFolderInfo;
         }
 
-        public override string Map(string resourceUrl)
+        protected override string FolderPath => _appFolderInfo.GetUpdateLogFolder();
+
+        protected override string MapPath(string resourceUrl)
         {
             var path = resourceUrl.Replace('/', Path.DirectorySeparatorChar);
             path = Path.GetFileName(path);
 
-            return Path.Combine(_appFolderInfo.GetUpdateLogFolder(), path);
+            return Path.Combine(FolderPath, path);
         }
 
         public override bool CanHandle(string resourceUrl)

src/Prowlarr.Http/Frontend/Mappers/UrlBaseReplacementResourceMapperBase.cs

@@ -0,0 +1,58 @@
+using System.IO;
+using NLog;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Core.Configuration;
+
+namespace Prowlarr.Http.Frontend.Mappers
+{
+    public abstract class UrlBaseReplacementResourceMapperBase : StaticResourceMapperBase
+    {
+        private readonly IDiskProvider _diskProvider;
+        private readonly string _urlBase;
+
+        private string _generatedContent;
+
+        public UrlBaseReplacementResourceMapperBase(IDiskProvider diskProvider, IConfigFileProvider configFileProvider, Logger logger)
+            : base(diskProvider, logger)
+        {
+            _diskProvider = diskProvider;
+            _urlBase = configFileProvider.UrlBase;
+        }
+
+        protected abstract string FilePath { get; }
+
+        protected override string MapPath(string resourceUrl)
+        {
+            return FilePath;
+        }
+
+        protected override Stream GetContentStream(string filePath)
+        {
+            var text = GetFileText();
+
+            var stream = new MemoryStream();
+            var writer = new StreamWriter(stream);
+            writer.Write(text);
+            writer.Flush();
+            stream.Position = 0;
+            return stream;
+        }
+
+        protected virtual string GetFileText()
+        {
+            if (RuntimeInfo.IsProduction && _generatedContent != null)
+            {
+                return _generatedContent;
+            }
+
+            var text = _diskProvider.ReadAllText(FilePath);
+
+            text = text.Replace("__URL_BASE__", _urlBase);
+
+            _generatedContent = text;
+
+            return _generatedContent;
+        }
+    }
+}

src/Prowlarr.Http/Frontend/StaticResourceController.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Cors;
@@ -16,6 +17,7 @@ namespace Prowlarr.Http.Frontend
     {
         private readonly IEnumerable<IMapHttpRequestsToDisk> _requestMappers;
         private readonly Logger _logger;
+        private static readonly Regex InvalidPathRegex = new(@"([\/\\]|%2f|%5c)\.\.|\.\.([\/\\]|%2f|%5c)", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         public StaticResourceController(IEnumerable<IMapHttpRequestsToDisk> requestMappers,
             Logger logger)
@@ -50,6 +52,11 @@ namespace Prowlarr.Http.Frontend
         {
             path = "/" + (path ?? "");
 
+            if (InvalidPathRegex.IsMatch(path))
+            {
+                return NotFound();
+            }
+
             var mapper = _requestMappers.SingleOrDefault(m => m.CanHandle(path));
 
             if (mapper != null)
@@ -58,7 +65,7 @@ namespace Prowlarr.Http.Frontend
 
                 if (result != null)
                 {
-                    if (result.ContentType == "text/html")
+                    if ((result as FileResult)?.ContentType == "text/html")
                     {
                         Response.Headers.DisableCache();
                     }

yarn.lock

@@ -2289,9 +2289,9 @@ camelcase@^5.3.1:
   integrity sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==
 
 caniuse-lite@^1.0.30001646, caniuse-lite@^1.0.30001663, caniuse-lite@^1.0.30001716:
-  version "1.0.30001718"
-  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001718.tgz"
-  integrity sha512-AflseV1ahcSunK53NfEs9gFWgOEmzr0f+kaMFA4xiLZlr9Hzt7HxcSpIFcnNCUkz6R6dWKa54rUz3HUmI3nVcw==
+  version "1.0.30001782"
+  resolved "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001782.tgz"
+  integrity sha512-dZcaJLJeDMh4rELYFw1tvSn1bhZWYFOt468FcbHHxx/Z/dFidd1I6ciyFdi3iwfQCyOjqo9upF6lGQYtMiJWxw==
 
 chalk@^2.4.1, chalk@^2.4.2:
   version "2.4.2"