Real YouTube download & MP3 conversion with yt-dlp

- Integrate yt-dlp.exe for real YouTube audio download/conversion
- Serve actual MP3 files from wwwroot/downloads via API and static files
- Report real-time progress from yt-dlp to frontend
- Enhance DownloadController: file serving, metadata, deletion endpoints
- Update VideoController to track and return real file info/URLs
- Enable static file serving in Program.cs; update API info/logging
- Update Blazor frontend to use real download URLs and remove old JS logic
- Add README_UPDATED.md with new workflow and troubleshooting
- Improve error handling, logging, and file cleanup throughout backend
- Update .gitignore for downloads and yt-dlp.exe

TuneRipper/Pages/Home.razor

@@ -123,7 +123,7 @@
                                 <span class="download-title">@download.Title</span>
                                 <span class="download-date">@download.CreatedAt.ToString("MMM dd, yyyy HH:mm")</span>
                             </div>
-                            <button class="download-link-btn" @onclick="() => DownloadFile(download.FileName)">
+                            <button class="download-link-btn" @onclick="() => DownloadFile(download.DownloadUrl)">
                                 <span class="download-icon">⬇️</span>
                                 Download MP3
                             </button>
@@ -475,6 +475,7 @@
     {
         public string Title { get; set; } = "";
         public string FileName { get; set; } = "";
+        public string DownloadUrl { get; set; } = "";
         public DateTime CreatedAt { get; set; }
     }
 
@@ -564,7 +565,7 @@
                         var result = await ApiService.GetProcessingResultAsync(jobId);
                         if (result?.Success == true)
                         {
-                            await CompleteProcessing(result);
+                            await CompleteProcessing(result, jobId);
                         }
                         else
                         {
@@ -603,7 +604,7 @@
         }
     }
 
-    private async Task CompleteProcessing(ProcessVideoResponse result)
+    private async Task CompleteProcessing(ProcessVideoResponse result, string jobId)
     {
         try
         {
@@ -616,10 +617,24 @@
             // Use the actual video title from API
             string title = currentVideoDetails?.Title ?? result.VideoDetails?.Title ?? ExtractTitleFromUrl(youtubeUrl);
             
+            // Create the download URL - either from the result or construct it from the job ID
+            string downloadUrl;
+            if (!string.IsNullOrEmpty(result.DownloadUrl))
+            {
+                // If the result contains a direct download URL, use it
+                downloadUrl = result.DownloadUrl.StartsWith("http") ? result.DownloadUrl : $"https://localhost:7160{result.DownloadUrl}";
+            }
+            else
+            {
+                // Fallback: construct download URL from job ID
+                downloadUrl = $"https://localhost:7160/api/download/{jobId}";
+            }
+            
             downloadLinks.Add(new DownloadItem
             {
                 Title = title,
                 FileName = result.FileName ?? "sample.mp3",
+                DownloadUrl = downloadUrl,
                 CreatedAt = DateTime.Now
             });
             
@@ -655,9 +670,19 @@
         return $"Audio File {DateTime.Now:HHmmss}";
     }
 
-    private async Task DownloadFile(string fileName)
+    private async Task DownloadFile(string downloadUrl)
     {
-        await JSRuntime.InvokeVoidAsync("downloadFile", fileName);
+        try
+        {
+            // Use the browser to navigate directly to the download URL
+            await JSRuntime.InvokeVoidAsync("open", downloadUrl, "_blank");
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "Error downloading file from URL: {DownloadUrl}", downloadUrl);
+            apiErrorMessage = $"Error downloading file: {ex.Message}";
+            StateHasChanged();
+        }
     }
 
     private async Task HandleKeyPress(KeyboardEventArgs e)
@@ -667,21 +692,4 @@
             await DownloadMp3();
         }
     }
-
-    protected override async Task OnAfterRenderAsync(bool firstRender)
-    {
-        if (firstRender)
-        {
-            await JSRuntime.InvokeVoidAsync("eval", @"
-                window.downloadFile = function(fileName) {
-                    const link = document.createElement('a');
-                    link.href = fileName;
-                    link.download = fileName;
-                    document.body.appendChild(link);
-                    link.click();
-                    document.body.removeChild(link);
-                };
-            ");
-        }
-    }
 }