Sonic.exe Download Portable 【720p】

// ------------------------------------------------------------- // Helper: SHA‑256 verification (pass expected hash string or null) // ------------------------------------------------------------- public static async Task VerifyHashAsync(string filePath, string expectedHash = null) using var sha256 = SHA256.Create(); await using var stream = File.OpenRead(filePath); byte[] hash = await sha256.ComputeHashAsync(stream); string computed = BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();

while ((read = await contentStream.ReadAsync(buffer.AsMemory(0, buffer.Length), ct)) > 0) await fileStream.WriteAsync(buffer.AsMemory(0, read), ct); totalRead += read; progress?.Report((totalRead, totalBytes)); sonic.exe download

public MainForm() InitializeComponent(); btnDownload.Click += BtnDownload_Click; await using var stream = File.OpenRead(filePath)

// ------------------------------------------------------------- // Helper: get Content‑Length via HEAD request // ------------------------------------------------------------- private static async Task<long> GetContentLengthAsync(string url, CancellationToken ct) using var request = new HttpRequestMessage(HttpMethod.Head, url); using var response = await _http.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, ct); response.EnsureSuccessStatusCode(); byte[] hash = await sha256.ComputeHashAsync(stream)

if (!string.IsNullOrWhiteSpace(expectedHash) && !computed.Equals(expectedHash, StringComparison.OrdinalIgnoreCase)) throw new InvalidDataException( $"Hash mismatch! Expected expectedHash, got computed.");