Question

我们使用PuppeteerSharp来增加用户下载我们应用程序PDF的能力。不幸的是，有时启动了大量的Chromium进程，直到服务器重启后才停止。

通常，当用户下载pdf时，会启动5个铬处理，而下载完成后这些处理会消失。

这是我们的代码：

private static LaunchOptions launchOptions = new LaunchOptions
{
    ExecutablePath = chromepath,
    Headless = true,
    DefaultViewport = ViewPortOptions
};

public static void ExportPdf(string url, string location)
{
    try
    {
        Task<string> task = Task.Run<string>(async () => await ExportPdfASync(url, location)));
        task.Wait();
    }
    catch (Exception)
    {
        // Exception handling
    }
}

public static async Task<string> ExportPdfASync(string url, string location)
{
    using (var browser = await Puppeteer.LaunchAsync(LaunchOptions))
    using (var page = await browser.NewPageAsync())
    {
        await page.SetViewportAsync(new ViewPortOptions() { Width = 1440, Height = 990, IsMobile = false, DeviceScaleFactor = 1.0 });

        await page.SetJavaScriptEnabledAsync(true);
        await page.GoToAsync(url);
        await page.WaitForTimeoutAsync(1500);

        var marginOptions = new MarginOptions()
        {
            Top = "10mm",
            Left = "10mm",
            Right = "10mm",
            Bottom = "10mm"
        };

        var pdfOptions = new PdfOptions()
        {
            PrintBackground = true,
            Format = PaperFormat.A4,
            MarginOptions = marginOptions,
            Landscape = landscape
        };
        await page.PdfAsync(location, pdfOptions);
    }

    return "";
}

浏览器和页面位于using块中，因此即使出现错误也应将其丢弃。

有人对此问题有解决方案吗？我们和我们的服务器将非常高兴；）

Answer 1

尝试一下：

public static async Task<string> ExportPdfASync(string url, string location)
{
 try
 {
   using (var browser = await Puppeteer.LaunchAsync(LaunchOptions))
   using (var page = await browser.NewPageAsync())
   {
    await page.SetViewportAsync(new ViewPortOptions() { Width = 1440, Height = 990, IsMobile = false, DeviceScaleFactor = 1.0 });

    await page.SetJavaScriptEnabledAsync(true);
    await page.GoToAsync(url);
    await page.WaitForTimeoutAsync(1500);

    var marginOptions = new MarginOptions()
    {
        Top = "10mm",
        Left = "10mm",
        Right = "10mm",
        Bottom = "10mm"
    };

    var pdfOptions = new PdfOptions()
    {
        PrintBackground = true,
        Format = PaperFormat.A4,
        MarginOptions = marginOptions,
        Landscape = landscape
    };
    await page.PdfAsync(location, pdfOptions);
  }
  }
  catch (Exception ex)
  {
  }
  finally {
    browser.CloseAsync();
    page.CloseAsync();
  }
  return "";
}

PuppeteerSharp铬实例数

1 个答案: