Add Server-Side Download Queue (#21)

* test add queueing to file service

* further adjustments to download queueing

* add check for whether the request is still in the queue to CheckQueue

* forcefully release slot if download didn't finish in 15s

* actually cancel the delay task

* add metrics and refactor some of the request queue service

* refactor pathing

* reuse httpclient

* add queue request dto to requestfile, enqueue users immediately if a slot is available

* change startup to include all controllers

* update server pathing

* update pathing, again

* several adjustments to auth, banning, jwt server tokens, renaming, authorization

* update api I guess

* adjust automated banning of charaident and reg

* generate jwt on servers for internal authentication

* remove mvcextensions

Co-authored-by: rootdarkarchon <root.darkarchon@outlook.com>

MareSynchronosServer/MareSynchronosStaticFilesServer/Controllers/CacheController.cs

@@ -0,0 +1,42 @@
+using MareSynchronos.API;
+using MareSynchronosShared.Utils;
+using MareSynchronosStaticFilesServer.Services;
+using MareSynchronosStaticFilesServer.Utils;
+using Microsoft.AspNetCore.Mvc;
+
+namespace MareSynchronosStaticFilesServer.Controllers;
+
+[Route(MareFiles.Cache)]
+public class CacheController : ControllerBase
+{
+    private readonly RequestFileStreamResultFactory _requestFileStreamResultFactory;
+    private readonly CachedFileProvider _cachedFileProvider;
+    private readonly RequestQueueService _requestQueue;
+
+    public CacheController(ILogger<CacheController> logger, RequestFileStreamResultFactory requestFileStreamResultFactory,
+        CachedFileProvider cachedFileProvider, RequestQueueService requestQueue, ServerTokenGenerator generator) : base(logger, generator)
+    {
+        _requestFileStreamResultFactory = requestFileStreamResultFactory;
+        _cachedFileProvider = cachedFileProvider;
+        _requestQueue = requestQueue;
+    }
+
+    [HttpGet(MareFiles.Cache_Get)]
+    public async Task<IActionResult> GetFile(Guid requestId)
+    {
+        _logger.LogDebug($"GetFile:{MareUser}:{requestId}");
+
+        if (!_requestQueue.IsActiveProcessing(requestId, MareUser, out var request)) return BadRequest();
+
+        _requestQueue.ActivateRequest(requestId);
+
+        var fs = await _cachedFileProvider.GetAndDownloadFileStream(request.FileId, Authorization);
+        if (fs == null)
+        {
+            _requestQueue.FinishRequest(requestId);
+            return NotFound();
+        }
+
+        return _requestFileStreamResultFactory.Create(requestId, fs);
+    }
+}