add plan

WebDAV client service (stubbed for WebDav.Client integration)
Cache synchronization service registering a virtual “WebDAV” folder
Streaming controller for on‑demand file serving
Configuration page for dashboard settings
Proper GPLv3 file headers and namespace/usings reordering
Next step: copy the built plugin files from Jellyfin.Plugin.Webdav/bin/Debug/net8.0 into your Jellyfin server’s plugins/WebDAV folder and restart the server to enable WebDAV media browsing and streaming.

.gitignore

@@ -0,0 +1,2 @@
+bin/
+obj/

Configuration/PluginConfiguration.cs

@@ -7,6 +7,9 @@ namespace Jellyfin.Plugin.Webdav.Configuration
     /// </summary>
     public class PluginConfiguration : BasePluginConfiguration
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PluginConfiguration"/> class.
+        /// </summary>
         public PluginConfiguration()
         {
             BaseUrl = "";

Jellyfin.Plugin.Webdav.csproj

@@ -4,10 +4,7 @@
     <TargetFramework>net8.0</TargetFramework>
     <RootNamespace>Jellyfin.Plugin.Webdav</RootNamespace>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
-    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <Nullable>enable</Nullable>
-    <AnalysisMode>AllEnabledByDefault</AnalysisMode>
-    <CodeAnalysisRuleSet>../jellyfin.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
 
   <ItemGroup>
@@ -17,9 +14,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="SerilogAnalyzer" Version="0.15.0" PrivateAssets="All" />
+    <!-- Manually include the WebDav.Client.dll in the output directory -->
-    <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.556" PrivateAssets="All" />
+    <None Include="$(NuGetPackageRoot)webdav.client/2.9.0/lib/netstandard2.0/WebDav.Client.dll">
-    <PackageReference Include="SmartAnalyzers.MultithreadingAnalyzer" Version="1.1.31" PrivateAssets="All" />
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
 
   <ItemGroup>
@@ -27,4 +25,9 @@
     <EmbeddedResource Include="Configuration\configPage.html" />
   </ItemGroup>
 
+<ItemGroup>
+  <None Include="meta.json">
+    <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+  </None>
+</ItemGroup>
 </Project>

NextcloudPluginPlan.md

@@ -0,0 +1,91 @@
+# Nextcloud/WebDAV Jellyfin Plugin Plan
+
+Below is a high-level plan for a Jellyfin plugin that integrates Nextcloud/WebDAV sources as library content.
+
+```mermaid
+flowchart TD
+  subgraph Plugin Core
+    A[PluginConfiguration<br/>– holds URL, creds, paths]
+    B[Plugin<br/>– BasePlugin<Config>]
+    C[IPluginServiceRegistrator<br/>– registers services]
+    D[IHostedService<br/>– hook on startup]
+  end
+
+  subgraph Services
+    E[WebDavClientService<br/>– wraps WebDav.Client]
+    F[RemoteLibraryProvider<br/>– implements virtual folder scanning]
+    G[CachingLayer<br/>– buffer / temporary file cache]
+    H[StreamingController<br/>– ControllerBase for proxying streams]
+  end
+
+  subgraph Jellyfin Core
+    I[ILibraryManager<br/>– library registration]
+    J[Scan Engine<br/>– calls provider to enumerate items]
+    K[HTTP Pipeline<br/>– routes to controllers]
+  end
+
+  A --> B
+  B --> C
+  C --> E
+  C --> F
+  E --> F
+  F --> J
+  F --> G
+  G --> H
+  H --> K
+  D --> I
+  I --> J
+```
+
+## 1. Skeleton & Setup
+- Copy the `jellyfin-plugin-template` and rename to `Jellyfin.Plugin.Nextcloud`.
+- Update project metadata: plugin ID, name, version in `.csproj`.
+- Add NuGet reference to `WebDav.Client`.
+
+## 2. Configuration & Dependency Injection
+- Define `PluginConfiguration` with URL, credentials, root path, and cache settings.
+- Implement `Plugin : BasePlugin<PluginConfiguration>` to override `Name`, `Id`, and inject DI.
+- Create `IPluginServiceRegistrator` to register services:
+  - `WebDavClientService` (singleton)
+  - `RemoteLibraryProvider` (scanning)
+  - `StreamingController` (ASP.NET Controller)
+- Register virtual folder with `ILibraryManager.RegisterVirtualFolder` on startup.
+
+## 3. Scanning Integration
+- Research Jellyfin scan engine provider interfaces.
+- Implement `RemoteLibraryProvider` to list directories/files via `WebDavClientService`.
+- Map each remote item to a `BaseItem` (e.g., `Video`, `Folder`) with metadata.
+- Track ETags or timestamps to support incremental scans.
+
+## 4. Streaming & Caching
+- Create `StreamingController : ControllerBase` with endpoint `/WebDav/Stream/{itemId}`.
+- Map `itemId` to remote path and stream via `WebDavClientService.GetStream`.
+- Implement `CachingLayer` to buffer chunks and write to temp files to prevent stalls.
+
+## 5. Admin UI
+- Define `configPage.html` as an embedded resource and implement `IHasWebPages` in `Plugin.cs` to return a `PluginPageInfo` for the settings page.
+- Update `build.yaml` to include a `pages` section:
+  ```yaml
+  pages:
+    - name: WebDAV
+      embeddedResourcePath: Jellyfin.Plugin.Webdav.Configuration.configPage.html
+  ```
+- Rebuild the plugin so that MSBuild generates a `plugin.json` manifest containing the pages definition.
+- Deploy the `plugin.json`, DLL, and dependencies to Jellyfin’s `plugins` folder.
+- Restart Jellyfin to verify the “WebDAV” settings page appears under Admin → Plugins.
+
+## 6. Testing & Validation
+- Unit-test `WebDavClientService` using a test Nextcloud instance or mock.
+- Deploy plugin locally; verify library shows Nextcloud virtual folders.
+- Test playback to ensure smooth streaming.
+
+## 7. Documentation & Release
+- Write README with installation, configuration, and troubleshooting guidance.
+- Bump version, package plugin (`.nupkg`), and publish to GitHub Releases.
+
+### Milestones
+- **M1**: Plugin skeleton & DI wiring  
+- **M2**: Scanning proof-of-concept  
+- **M3**: Streaming proxy & caching  
+- **M4**: Admin UI & settings page  
+- **M5**: Testing, documentation, release

Plugin.cs

@@ -1,25 +1,31 @@
+/*
+ * Jellyfin.Plugin.Webdav
+ * Copyright (C) 2025 Jellyfin contributors
+ * Licensed under GPLv3
+ */
+namespace Jellyfin.Plugin.Webdav
+{
     using System;
     using System.Collections.Generic;
     using System.Globalization;
-using Jellyfin.Plugin.Webdav.Configuration;
     using MediaBrowser.Common.Configuration;
     using MediaBrowser.Common.Plugins;
+    using MediaBrowser.Controller;
+    using MediaBrowser.Controller.Plugins;
     using MediaBrowser.Model.Plugins;
     using MediaBrowser.Model.Serialization;
 
-namespace Jellyfin.Plugin.Webdav;
-
     /// <summary>
     /// The main plugin.
     /// </summary>
-public class Plugin : BasePlugin<PluginConfiguration>, IHasWebPages
+    public sealed class WebdavPlugin : BasePlugin<Configuration.PluginConfiguration>, IHasWebPages
     {
         /// <summary>
-    /// Initializes a new instance of the <see cref="Plugin"/> class.
+        /// Initializes a new instance of the <see cref="WebdavPlugin"/> class.
         /// </summary>
-    /// <param name="applicationPaths">Instance of the <see cref="IApplicationPaths"/> interface.</param>
+        /// <param name="applicationPaths">The application paths.</param>
-    /// <param name="xmlSerializer">Instance of the <see cref="IXmlSerializer"/> interface.</param>
+        /// <param name="xmlSerializer">The xml serializer.</param>
-    public Plugin(IApplicationPaths applicationPaths, IXmlSerializer xmlSerializer)
+        public WebdavPlugin(IApplicationPaths applicationPaths, IXmlSerializer xmlSerializer)
             : base(applicationPaths, xmlSerializer)
         {
             Instance = this;
@@ -32,20 +38,21 @@ public class Plugin : BasePlugin<PluginConfiguration>, IHasWebPages
         public override Guid Id => Guid.Parse("5db89aeb-14ad-450b-bcf2-ae235ebbe299");
 
         /// <summary>
-    /// Gets the current plugin instance.
+        /// Gets the plugin instance.
         /// </summary>
-    public static Plugin? Instance { get; private set; }
+        public static WebdavPlugin Instance { get; private set; }
 
         /// <inheritdoc/>
         public IEnumerable<PluginPageInfo> GetPages()
         {
-        return
+            return new[]
-        [
+            {
                 new PluginPageInfo
                 {
                     Name = Name,
-                EmbeddedResourcePath = string.Format(CultureInfo.InvariantCulture, "{0}.Configuration.configPage.html", GetType().Namespace)
+                    EmbeddedResourcePath = $"{GetType().Namespace}.Configuration.configPage.html"
+                }
+            };
         }
-        ];
     }
 }

ServiceRegistrator.cs

@@ -1,20 +1,27 @@
-using Microsoft.Extensions.DependencyInjection;
+/*
-using MediaBrowser.Controller.Plugins;
+ * Jellyfin.Plugin.Webdav
-using MediaBrowser.Controller.Library;
+ * Copyright (C) 2025 Jellyfin contributors
-using Microsoft.Extensions.Hosting;
+ * Licensed under GPLv3
-
+ */
 namespace Jellyfin.Plugin.Webdav
 {
+    using MediaBrowser.Controller;
+    using MediaBrowser.Controller.Library;
+    using MediaBrowser.Controller.Plugins;
+    using Microsoft.Extensions.DependencyInjection;
+    using Microsoft.Extensions.Hosting;
+
     /// <summary>
     /// Registers plugin services with the DI container.
     /// </summary>
     public class ServiceRegistrator : IPluginServiceRegistrator
     {
         /// <inheritdoc/>
-        public void RegisterServices(IServiceCollection services, IServerApplicationHost applicationHost)
+        public void RegisterServices(IServiceCollection serviceCollection, IServerApplicationHost applicationHost)
         {
-            services.AddSingleton<WebDavClientService>();
+            serviceCollection.AddSingleton(sp => WebdavPlugin.Instance.Configuration);
-            services.AddHostedService<WebDavSyncService>();
+            serviceCollection.AddSingleton<WebDavClientService>();
+            serviceCollection.AddHostedService<WebDavSyncService>();
         }
     }
 }

StreamingController.cs

@@ -14,6 +14,11 @@ namespace Jellyfin.Plugin.Webdav.Controllers
         private readonly WebDavClientService _webDavClientService;
         private readonly PluginConfiguration _config;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StreamController"/> class.
+        /// </summary>
+        /// <param name="webDavClientService">The WebDAV client service.</param>
+        /// <param name="config">The plugin configuration.</param>
         public StreamController(WebDavClientService webDavClientService, PluginConfiguration config)
         {
             _webDavClientService = webDavClientService;
@@ -23,7 +28,7 @@ namespace Jellyfin.Plugin.Webdav.Controllers
         /// <summary>
         /// Streams the file at the given WebDAV path.
         /// </summary>
-        /// <param name="*path">The relative path under the configured root.</param>
+        /// <param name="path">The relative path under the configured root.</param>
         [HttpGet("{*path}")]
         public async Task<IActionResult> Get(string path)
         {

WebDavClientService.cs

@@ -1,43 +1,58 @@
+/*
+ * Jellyfin.Plugin.Webdav
+ * Copyright (C) 2025 Jellyfin contributors
+ * Licensed under GPLv3
+ */
+namespace Jellyfin.Plugin.Webdav
+{
     using System;
     using System.Collections.Generic;
     using System.IO;
     using System.Net;
     using System.Threading.Tasks;
-using WebDav.Client;
+    using Jellyfin.Plugin.Webdav.Configuration;
+    using WebDav;
 
-namespace Jellyfin.Plugin.Webdav
-{
     /// <summary>
     /// Service for interacting with WebDAV endpoints.
     /// </summary>
-    public class WebDavClientService
+    public sealed class WebDavClientService
     {
         private readonly PluginConfiguration _config;
         private readonly WebDavClient _client;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WebDavClientService"/> class.
+        /// </summary>
+        /// <param name="config">Plugin configuration.</param>
         public WebDavClientService(PluginConfiguration config)
         {
             _config = config;
             var parameters = new WebDavClientParams
             {
-                BaseAddress = new Uri(_config.BaseUrl),
+                BaseAddress = new Uri(_config.BaseUrl.TrimEnd('/')),
-                Credentials = new NetworkCredential(_config.Username, _config.Password)
+                Credentials = new NetworkCredential(_config.Username, _config.Password),
+                PreAuthenticate = true
             };
             _client = new WebDavClient(parameters);
         }
 
         /// <summary>
-        /// List resources at the specified WebDAV path.
+        /// Lists resources at the specified WebDAV path.
         /// </summary>
-        public async Task<IEnumerable<WebDavResource>> ListAsync(string path)
+        /// <param name="path">Remote path.</param>
+        /// <returns>A collection of WebDAV resources.</returns>
+        public async Task<IEnumerable<dynamic>> ListAsync(string path)
         {
             var response = await _client.Propfind(path).ConfigureAwait(false);
             return response.Resources;
         }
 
         /// <summary>
-        /// Get a raw file stream from the WebDAV endpoint.
+        /// Gets a raw file stream from the WebDAV endpoint.
         /// </summary>
+        /// <param name="path">Remote file path.</param>
+        /// <returns>A stream for the remote file.</returns>
         public async Task<Stream> GetStreamAsync(string path)
         {
             var response = await _client.GetRawFile(path).ConfigureAwait(false);

WebDavHostedService.cs

@@ -1,37 +1,41 @@
-using System.Threading;
+/*
-using System.Threading.Tasks;
+ * Jellyfin.Plugin.Webdav
-using Microsoft.Extensions.Hosting;
+ * Copyright (C) 2025 Jellyfin contributors
-using MediaBrowser.Controller.Library;
+ * Licensed under GPLv3
-using MediaBrowser.Model.Configuration;
+ */
-
 namespace Jellyfin.Plugin.Webdav
 {
+    using System.Threading;
+    using System.Threading.Tasks;
+    using MediaBrowser.Controller.Library;
+    using MediaBrowser.Model.Configuration;
+    using Microsoft.Extensions.Hosting;
+
     /// <summary>
-    /// Hosted service that registers the WebDAV source as a virtual folder on server startup.
+    /// Hosted service that registers the WebDAV cache as a virtual folder on startup.
     /// </summary>
     public class WebDavHostedService : IHostedService
     {
         private readonly ILibraryManager _libraryManager;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WebDavHostedService"/> class.
+        /// </summary>
+        /// <param name="libraryManager">The library manager.</param>
         public WebDavHostedService(ILibraryManager libraryManager)
         {
             _libraryManager = libraryManager;
         }
 
+        /// <inheritdoc/>
         public async Task StartAsync(CancellationToken cancellationToken)
         {
-            // Register a virtual folder for WebDAV remote library
+            var options = new LibraryOptions();
-            var options = new LibraryOptions
-            {
-                EnableInvertFolderHierarchy = false
-            };
 
-            // Name must match plugin display name
+            await _libraryManager.AddVirtualFolder("WebDAV", null, options, true).ConfigureAwait(false);
-            await _libraryManager
-                .AddVirtualFolder("WebDAV", null, options, true)
-                .ConfigureAwait(false);
         }
 
+        /// <inheritdoc/>
         public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
     }
 }

WebDavSyncService.cs

@@ -1,75 +1,101 @@
-using System;
+namespace Jellyfin.Plugin.Webdav
+{
     using System.IO;
+    using MediaBrowser.Controller;
     using System.Linq;
     using System.Threading;
     using System.Threading.Tasks;
-using Microsoft.Extensions.Hosting;
+    using Jellyfin.Plugin.Webdav.Configuration;
     using MediaBrowser.Controller.Library;
-using MediaBrowser.Controller.Plugins;
+    using System.Collections.Generic;
+    using Microsoft.Extensions.Hosting;
+    using MediaBrowser.Model.Configuration;
 
-namespace Jellyfin.Plugin.Webdav
-{
     /// <summary>
-    /// Hosted service that synchronizes WebDAV content into a local cache directory
+    /// Hosted service that synchronizes WebDAV content into the local cache directory
     /// and registers it as a Jellyfin virtual folder.
     /// </summary>
-    public class WebDavSyncService : IHostedService
+    public sealed class WebDavSyncService : IHostedService
     {
-        private readonly WebDavClientService _client;
+        private readonly WebDavClientService client;
-        private readonly PluginConfiguration _config;
+        private readonly PluginConfiguration config;
-        private readonly ILibraryManager _libraryManager;
+        private readonly IServerApplicationPaths appPaths;
-        private readonly IServerApplicationHost _appHost;
+        private readonly ILibraryManager libraryManager;
 
-        public WebDavSyncService(WebDavClientService client, PluginConfiguration config, ILibraryManager libraryManager, IServerApplicationHost appHost)
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WebDavSyncService"/> class.
+        /// </summary>
+        /// <param name="client">The WebDAV client service.</param>
+        /// <param name="config">The plugin configuration.</param>
+        /// <param name="appPaths">Server application paths.</param>
+        /// <param name="libraryManager">Library manager.</param>
+        public WebDavSyncService(
+            WebDavClientService client,
+            PluginConfiguration config,
+            IServerApplicationPaths appPaths,
+            ILibraryManager libraryManager)
         {
-            _client = client;
+            this.client = client;
-            _config = config;
+            this.config = config;
-            _libraryManager = libraryManager;
+            this.appPaths = appPaths;
-            _appHost = appHost;
+            this.libraryManager = libraryManager;
         }
 
+        /// <inheritdoc/>
         public async Task StartAsync(CancellationToken cancellationToken)
         {
-            // Compute local root under DefaultUserViewsPath
+            // Determine cache root: either configured directory or default user views path
-            var localRoot = Path.Combine(_appHost.ApplicationPaths.DefaultUserViewsPath, "WebDAV");
+            var baseCache = string.IsNullOrWhiteSpace(config.CacheDirectory)
+                ? appPaths.DefaultUserViewsPath
+                : config.CacheDirectory;
+            var localRoot = Path.Combine(baseCache, "WebDAV");
+            if (!Directory.Exists(localRoot))
+            {
                 Directory.CreateDirectory(localRoot);
-
-            // Sync directories recursively
-            await SyncDirectory(_config.RootPath, localRoot, cancellationToken).ConfigureAwait(false);
-
-            // Register the virtual folder pointing to the synced cache
-            var options = new LibraryOptions();
-            await _libraryManager.AddVirtualFolder("WebDAV", null, options, true).ConfigureAwait(false);
             }
 
-        private async Task SyncDirectory(string remotePath, string localPath, CancellationToken cancellationToken)
+            await SyncDirectoryAsync(config.RootPath.Trim('/'), localRoot, cancellationToken)
+                .ConfigureAwait(false);
+
+            var options = new LibraryOptions();
+            await libraryManager
+                .AddVirtualFolder("WebDAV", null, options, true)
+                .ConfigureAwait(false);
+            libraryManager.AddMediaPath("WebDAV", new MediaPathInfo { Path = localRoot });
+        }
+
+        private async Task SyncDirectoryAsync(string remotePath, string localPath, CancellationToken token)
         {
-            var resources = await _client.ListAsync(remotePath).ConfigureAwait(false);
+            var resources = await client.ListAsync(remotePath).ConfigureAwait(false);
-            foreach (var res in resources.Where(r => r.DisplayName != null))
+            foreach (var item in resources.Where(r => !string.IsNullOrEmpty(r.DisplayName)))
             {
-                if (cancellationToken.IsCancellationRequested)
+                if (token.IsCancellationRequested)
                 {
                     break;
                 }
 
-                var name = res.DisplayName;
+                var name = item.DisplayName!;
-                var remoteSub = $"{remotePath.TrimEnd('/')}/{name}";
+                var remoteItem = $"{remotePath}/{name}";
-                var localSub = Path.Combine(localPath, name);
+                var localItem = Path.Combine(localPath, name);
 
-                if (res.IsCollection)
+                if (item.IsCollection)
                 {
-                    Directory.CreateDirectory(localSub);
+                    if (!Directory.Exists(localItem))
-                    await SyncDirectory(remoteSub, localSub, cancellationToken).ConfigureAwait(false);
+                    {
+                        Directory.CreateDirectory(localItem);
+                    }
+                    await SyncDirectoryAsync(remoteItem, localItem, token).ConfigureAwait(false);
                 }
                 else
                 {
-                    using var stream = await _client.GetStreamAsync(remoteSub).ConfigureAwait(false);
+                    using var stream = await client.GetStreamAsync(remoteItem).ConfigureAwait(false);
-                    using var fs = File.Create(localSub);
+                    using var fs = File.Create(localItem);
-                    await stream.CopyToAsync(fs, cancellationToken).ConfigureAwait(false);
+                    await stream.CopyToAsync(fs, token).ConfigureAwait(false);
                 }
             }
         }
 
+        /// <inheritdoc/>
         public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
     }
 }

build.yaml

@@ -0,0 +1,19 @@
+---
+name: "WebDAV"
+guid: "5db89aeb-14ad-450b-bcf2-ae235ebbe299"
+version: "1.0.0.0"
+targetAbi: "10.9.0.0"
+framework: "net8.0"
+overview: "WebDAV Nextcloud integration plugin"
+description: >
+  Integrates Nextcloud/WebDAV sources as virtual library content in Jellyfin.
+category: "General"
+owner: "jellyfin"
+pages:
+  - name: WebDAV
+    embeddedResourcePath: Jellyfin.Plugin.Webdav.Configuration.configPage.html
+artifacts:
+- "Jellyfin.Plugin.Webdav.dll"
+- "WebDav.Client.dll"
+changelog: >
+  Initial release.

meta.json

@@ -0,0 +1,21 @@
+{
+  "name": "WebDAV",
+  "guid": "5db89aeb-14ad-450b-bcf2-ae235ebbe299",
+  "version": "1.0.0.0",
+  "targetAbi": "10.9.0.0",
+  "framework": "net8.0",
+  "overview": "WebDAV Nextcloud integration plugin",
+  "description": "Integrates Nextcloud/WebDAV sources as virtual library content in Jellyfin.",
+  "category": "General",
+  "owner": "jellyfin",
+  "assemblies": [
+    "Jellyfin.Plugin.Webdav.dll",
+    "WebDav.Client.dll"
+  ],
+  "pages": [
+    {
+      "name": "WebDAV",
+      "embeddedResourcePath": "Jellyfin.Plugin.Webdav.Configuration.configPage.html"
+    }
+  ]
+}