Azure虚拟机部署时PuppeteerSharp DownloadAsync下载Chrome失败求助

环境信息 #

• 基于C#开发，运行在.NET 4.8.1环境，搭配AngularJS（该部分与问题无关）
• 本地Windows 11的localhost/IIS Express环境下，PuppeteerSharp生成PDF功能正常
• 部署环境：Azure虚拟机（64位Windows Server 2019，8GB内存）+ IIS

问题现象 #

部署到Azure虚拟机后，因Chrome下载失败导致PDF生成流程中断，无法从指定URL获取Chrome安装包。

已尝试操作 #

• 将Chrome下载路径从TEMP文件夹切换到inetpub目录，已配置对应权限
• 可通过curl命令从目标URL下载对应.zip文件
• 可直接通过Chrome浏览器下载该文件

错误信息 #

Failed to download Chrome for Win64 from https://storage.googleapis.com/chrome-for-testing-public/127.0.6533.88/win64/chrome-win64.zip

调用栈 #

at PuppeteerSharp.BrowserFetcher.<DownloadAsync>d__39.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()     
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)     
   at PuppeteerSharp.BrowserFetcher.<DownloadAsync>d__32.MoveNext() 
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()     
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)     
   at PuppeteerSharp.BrowserFetcher.<DownloadAsync>d__28.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()     
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)     
   at App.Application._Core.Chromium.<DownloadChromium>d__13.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()     
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)     
   at App.Controllers.API.DataApiController.<GeneratePdf>d__1.MoveNext()

相关代码 #

数据API控制器端点（C#） #

[HttpPost]
[Route("some-route")]
public async Task<IHttpActionResult> GeneratePdf(RequestDto request) 
{
    var chromium = new Chromium();
    await chromium.DownloadChromium();
    Stream stream = await chromium.CreateStreamAsync(request.Html);

    MemoryStream ms = new MemoryStream();
    stream.CopyTo(ms);

    var result = new HttpResponseMessage()
    {
        Content = new ByteArrayContent(ms.ToArray()),
        StatusCode = HttpStatusCode.OK
    };

    result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
    result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
    {
        FileName = $"{request.pdfName}.pdf"
    };

    return ResponseMessage(result);    
}

Chromium封装类代码（C#） #

/// <summary>
/// 基于PuppeteerSharp封装的HTML转PDF工具类
/// </summary>
public Chromium()
{
    _Logger = LogManager.GetCurrentClassLogger();
    var directory = AppDomain.CurrentDomain.BaseDirectory;
    var driveDownloads = Path.Combine(directory, "chromium");

    _InstallDirectory = driveDownloads;

    _Logger.Info($"chromium类安装目录: [{_InstallDirectory}]");
}

/// <summary>
/// 将Chromium下载到指定安装目录
/// </summary>
/// <returns></returns>
public async Task<bool> DownloadChromium()
{
    SetupChromiumDownloadDirectory(_InstallDirectory);

    _BrowserFetcher = new BrowserFetcher(new BrowserFetcherOptions() { Path = _InstallDirectory });
    _Logger.Info($"浏览器缓存下载目录: [{_BrowserFetcher.CacheDir}]");

    // 错误发生在此处
    _InstalledBrowser = await _BrowserFetcher.DownloadAsync();

    return true;
}

/// <summary>
/// 配置Chromium自定义下载目录，避免默认目录路径过长导致异常
/// </summary>
/// <param name="directory"></param>
/// <returns></returns>
private bool SetupChromiumDownloadDirectory(string directory)
{
    _Logger.Debug($"配置chromium目录: [{directory}]");

    bool setup = false;
    bool exists = Directory.Exists(directory);

    var directoryInfo = new DirectoryInfo(directory);

    if (!exists)
    {
        _Logger.Debug($"目录不存在，创建目录");
        directoryInfo.Create();
    }

    var rule = new FileSystemAccessRule("Everyone", FileSystemRights.FullControl, InheritanceFlags.None, PropagationFlags.NoPropagateInherit, AccessControlType.Allow);
    var security = directoryInfo.GetAccessControl(AccessControlSections.Access);

    security.ModifyAccessRule(AccessControlModification.Set, rule, out setup);

    _Logger.Debug($"为目录[{directory}]设置ModifyAccessControl为SET，结果: [{setup}]");

    if (!setup)
        return false;

    rule = new FileSystemAccessRule("Everyone", FileSystemRights.FullControl,
                InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit,
                PropagationFlags.InheritOnly,
                AccessControlType.Allow);

    security.ModifyAccessRule(AccessControlModification.Add, rule, out setup);

    _Logger.Debug($"为目录[{directory}]设置ModifyAccessControl为ADD，结果: [{setup}]");

    if (!setup)
        return false;

    directoryInfo.SetAccessControl(security);

    return setup;
}

日志信息 #

2024-09-20 14:30:53.8350 INFO chromium class install directory: [C:\inetpub\wwwroot\chromium]
2024-09-20 14:30:53.8506 DEBUG Settting up chromium directory: [C:\inetpub\wwwroot\chromium]
2024-09-20 14:30:53.8506 DEBUG Setting ModifyAccessControl to SET for directory: [C:\inetpub\wwwroot\chromium] result: [True]
2024-09-20 14:30:53.8506 DEBUG Setting ModifyAccessControl to ADD for directory: [C:\inetpub\wwwroot\chromium] result: [True]
2024-09-20 14:30:53.8506 INFO browser cache download directory: [C:\inetpub\wwwroot\chromium]

内容的提问来源于stack exchange，提问作者B-M