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1、删除视频，永不下载

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2、去重-优先级
3、视频合成优化
4、其他优化
This commit is contained in:
jianzhichu
2025-12-03 23:43:10 +08:00
parent bd3a103f8f
commit 25e2a22dd2
29 changed files with 1023 additions and 702 deletions
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service/DouyinHttpClientService.cs
+108
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@@ -15,11 +15,14 @@ namespace dy.net.service
public static readonly string DouYinApi = "https://www.douyin.com/aweme/v1/web/aweme";
// 随机数生成器（避免重复实例化，保证随机性）
private readonly IHttpClientFactory _clientFactory;
// 下载信号量锁：初始计数1，最大并发1（同时只能一个下载任务）
private readonly SemaphoreSlim _downloadSemaphore = new SemaphoreSlim(1, 1);
public DouyinHttpClientService(IHttpClientFactory clientFactory)
{
_clientFactory = clientFactory;
}
/// <summary>
/// 查询用户收藏的视频
/// </summary>
@@ -371,6 +374,111 @@ namespace dy.net.service
}
}
/// <summary>
/// 下载文件并保存到本地（支持重试机制+单线程限制，同时只能一个下载）
/// </summary>
/// <param name="videoUrl">文件地址</param>
/// <param name="savePath">保存路径</param>
/// <param name="cookie">请求Cookie</param>
/// <param name="httpclientName">HttpClient名称（默认"dy_down1"）</param>
/// <param name="cancellationToken">取消令牌（用于终止任务）</param>
/// <param name="streamTimeout">流读取超时时间（默认60秒）</param>
/// <param name="maxRetryCount">最大重试次数（默认3次）</param>
/// <param name="initialRetryDelay">初始重试延迟（默认1秒，指数退避）</param>
/// <returns>是否下载成功</returns>
//public async Task<bool> DownloadAsync(
// string videoUrl,
// string savePath,
// string cookie,
// CancellationToken cancellationToken = default,
// TimeSpan? streamTimeout = null,
// int maxRetryCount = 3,
// TimeSpan? initialRetryDelay = null)
//{
// bool lockAcquired = false;
// try
// {
// // 申请锁：如果已有下载任务在执行，会阻塞等待直到锁释放
// // 传入cancellationToken支持取消等待
// await _downloadSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
// lockAcquired = true; // 标记锁已获取
// // 重试参数初始化
// int retryCount = 0;
// var retryDelay = initialRetryDelay ?? TimeSpan.FromSeconds(1);
// streamTimeout ??= TimeSpan.FromSeconds(60);
// while (true)
// {
// try
// {
// return await TryDownloadOnceAsync(
// videoUrl, savePath, cookie, cancellationToken, streamTimeout.Value);
// }
// catch (Exception ex) when (IsRetryableException(ex) && retryCount < maxRetryCount)
// {
// retryCount++;
// var delay = TimeSpan.FromMilliseconds(retryDelay.TotalMilliseconds * Math.Pow(2, retryCount - 1));
// Serilog.Log.Warning(ex, $"下载失败（第{retryCount}/{maxRetryCount}次重试）：{videoUrl}，将在{delay.TotalSeconds:F1}秒后重试");
// try
// {
// await Task.Delay(delay, cancellationToken).ConfigureAwait(false);
// }
// catch (OperationCanceledException)
// {
// Serilog.Log.Information($"重试等待被取消：{videoUrl}");
// CleanupIncompleteFile(savePath);
// return false;
// }
// }
// catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
// {
// Serilog.Log.Information($"下载被取消：{videoUrl}");
// CleanupIncompleteFile(savePath);
// return false;
// }
// catch (Exception ex)
// {
// Serilog.Log.Error(ex, $"下载失败（不可重试）：{videoUrl}");
// CleanupIncompleteFile(savePath);
// return false;
// }
// }
// }
// finally
// {
// // 确保锁一定释放（无论是否发生异常）
// if (lockAcquired)
// {
// _downloadSemaphore.Release();
// Serilog.Log.Debug($"下载锁已释放，下一个任务可执行");
// }
// }
//}
// 辅助类：用于using语句自动释放SemaphoreSlim
//public sealed class SemaphoreReleaser : IDisposable
//{
// private readonly SemaphoreSlim _semaphore;
// private bool _disposed;
// public SemaphoreReleaser(SemaphoreSlim semaphore)
// {
// _semaphore = semaphore ?? throw new ArgumentNullException(nameof(semaphore));
// }
// public void Dispose()
// {
// if (!_disposed)
// {
// _semaphore.Release(); // 释放锁，允许下一个任务执行
// _disposed = true;
// }
// }
//}
/// <summary>
/// 单次下载尝试（核心下载逻辑）
/// </summary>