using System; using System.Diagnostics; using System.IO; using System.Net.Http; using System.Text.RegularExpressions; using System.Threading.Tasks; using System.Windows; using System.Windows.Forms; namespace InstagramDownloader { public partial class MainWindow : Window { private readonly HttpClient _httpClient; private readonly string _tempFolder = Path.Combine(Path.GetTempPath(), "InstagramDownloads"); public MainWindow() { InitializeComponent(); _httpClient = new HttpClient(); Directory.CreateDirectory(_tempFolder); } private async void DownloadButton_Click(object sender, RoutedEventArgs e) { string url = UrlTextBox.Text.Trim(); if (string.IsNullOrEmpty(url)) { System.Windows.MessageBox.Show("Please enter a valid Instagram URL", "Error", MessageBoxButton.OK, MessageBoxImage.Error); return; } try { DownloadButton.IsEnabled = false; StatusText.Text = "Processing..."; string mediaUrl = await ExtractMediaUrl(url); if (string.IsNullOrEmpty(mediaUrl)) { System.Windows.MessageBox.Show("Could not extract media from the provided URL", "Error", MessageBoxButton.OK, MessageBoxImage.Error); return; } string fileName = Path.GetFileName(new Uri(mediaUrl).LocalPath); string filePath = Path.Combine(_tempFolder, fileName); await DownloadFileAsync(mediaUrl, filePath); var saveDialog = new SaveFileDialog { FileName = fileName, Filter = "All Files (*.*)|*.*" }; if (saveDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK) { File.Copy(filePath, saveDialog.FileName, true); StatusText.Text = "Download completed!"; System.Windows.MessageBox.Show($"File saved to: {saveDialog.FileName}", "Success", MessageBoxButton.OK, MessageBoxImage.Information); } } catch (Exception ex) { System.Windows.MessageBox.Show($"Error: {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error); } finally { DownloadButton.IsEnabled = true; } } private async Task ExtractMediaUrl(string postUrl) { try { string html = await _httpClient.GetStringAsync(postUrl); // Regex pattern to find video URL in Instagram HTML var videoRegex = new Regex(@"content=""https:\/\/[^""]+\.mp4[^""]*"""); var videoMatch = videoRegex.Match(html); if (videoMatch.Success) { return videoMatch.Value.Replace("content=\"", "").Replace("\"", ""); } // Regex pattern to find image URL in Instagram HTML var imageRegex = new Regex(@"