关于 Puppeteer Sharp 的介绍

前言

项目地址：https://github.com/hardkoded/puppeteer-sharp

Puppeteer Sharp is a .NET port of the official Node.JS Puppeteer API.

As Puppeteer-Sharp is a NetStandard 2.0 library, the minimum platform versions are .NET Framework 4.6.1 and .NET Core 2.0. Read more.
The minimum Windows versions supporting the WebSocket library are Windows 8 and Windows Server 2012. Read more.
If you need to run Puppeteer-Sharp on Windows 7 you can use System.Net.WebSockets.Client.Managed through the LaunchOptions.WebSocketFactory property.
If you have issues running Chrome on Linux, the Puppeteer repo has a great troubleshooting guide.
X-server is required on Linux.

 

使用说明

Take screenshots

await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
    Headless = true
});
var page = await browser.NewPageAsync();
await page.GoToAsync("http://www.google.com");
await page.ScreenshotAsync(outputFile);

You can also change the view port before generating the screenshot

await page.SetViewportAsync(new ViewPortOptions
{
    Width = 500,
    Height = 500
});

Generate PDF files

await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
    Headless = true
});
var page = await browser.NewPageAsync();
await page.GoToAsync("http://www.google.com");
await page.PdfAsync(outputFile);

Inject HTML

using(var page = await browser.NewPageAsync())
{
    await page.SetContentAsync("<div>My Receipt</div>");
    var result = await page.GetContentAsync();
    await page.PdfAsync(outputFile);
    SaveHtmlToDB(result);
}

Evaluate Javascript

using (var page = await browser.NewPageAsync())
{
    var seven = await page.EvaluateExpressionAsync<int>("4 + 3");
    var someObject = await page.EvaluateFunctionAsync<dynamic>("(value) => ({a: value})", 5);
    Console.WriteLine(someObject.a);
}

Wait For Selector

using (var page = await browser.NewPageAsync())
{
    await page.GoToAsync("http://www.spapage.com");
    await page.WaitForSelectorAsync("div.main-content")
    await page.PdfAsync(outputFile));
}

 

谢谢浏览！