4

我面临着一个令人讨厌的情况。我们尝试在我们的应用程序中使用 PuppeteerSharp 来生成背景 PDF,虽然它在开发模式下运行良好,但在生产环境中却不起作用。

该应用程序是一个 WebAPI 2.0 站点、.NET4.7.1、Windows 10 机器。我在这两种环境之间看到的主要区别是:

  • 构建发布而不是调试:在调试或发布模式下从控制台应用程序调用我的代码似乎以相同的方式工作
  • 在开发中托管在 IIS Express 中,在生产中托管完整的 IIS

我们使用以下代码:

var launchOptions = new LaunchOptions
{
    DefaultViewport = new ViewPortOptions
    {
        Width = 1920,
        Height = 1080,
        IsLandscape = printOptions.Orientation == PrintOrientation.Landscape
    },
    ExecutablePath = this._chromiumPath,
    Timeout = Timeout,
    TransportFactory = AspNetWebSocketTransport.AspNetTransportFactory
};

var browser = await Puppeteer.LaunchAsync(launchOptions)
    .ConfigureAwait(false);

var page = await browser.NewPageAsync()
    .ConfigureAwait(false);
await page.EmulateMediaTypeAsync(PuppeteerSharp.Media.MediaType.Print)
    .ConfigureAwait(false);

await page.GoToAsync(url, Timeout, new[] { WaitUntilNavigation.Networkidle0 })
    .ConfigureAwait(false);
await page.WaitForTimeoutAsync(2000)
    .ConfigureAwait(false);
var options = new PdfOptions
{
    Width = printOptions.Format == PrintFormat.A4 ? "210mm" : "297mm",
    Height = printOptions.Format == PrintFormat.A4 ? "297mm" : "420mm",
    PrintBackground = true,
    Landscape = printOptions.Orientation == PrintOrientation.Landscape,
    MarginOptions = new PuppeteerSharp.Media.MarginOptions
    {
        Top = ".4in",
        Bottom = ".4in",
        Left = ".4in",
        Right = ".4in"
    }
};
await page.PdfAsync(outputFile, options)
    .ConfigureAwait(false);
return result;

page.GoToAsync永远不会返回,并最终超时。

编辑:

  • false在所有异步调用中将 ConfigureAwait 设置为
  • 我尝试使用AspNetWebSocketTransport.AspNetTransportFactory运输工厂,它似乎也不起作用
4

2 回答 2

2
using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions()
{
    Headless = true,
    ExecutablePath = browserFetcher.GetExecutablePath(BrowserFetcher.DefaultRevision)
})

帮我解决了这个问题,AspNetWebSocketTransport 提出了引用问题,似乎不再有用了

于 2021-08-16T12:10:12.243 回答
2

如果要在 IIS 上部署 .NET Framework 应用程序。您还需要使用PuppeteerSharp.AspNetFramwork并将 设置TransportFactory为浏览器:

using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions()
{
    Headless = true,
    TransportFactory = AspNetWebSocketTransport.AspNetTransportFactory,
    ExecutablePath = browserFetcher.GetExecutablePath(BrowserFetcher.DefaultRevision)
}).ConfigureAwait(false))

更新:Nuget 包已过时(硬引用 PuppeteerSharp 1.0.0.0),但可以在此处找到源:https ://github.com/hardkoded/puppeteer-sharp/blob/076897d0cf627c947c61a1192fcb20d968d05cbc/lib/PuppeteerSharp.AspNetFramework/AspNetWebSocketTransport 。CS

于 2020-06-17T12:37:17.877 回答