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How to use FrameGoToTests class of PuppeteerSharp.Tests.NavigationTests package

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tests.NavigationTests.FrameGoToTests

FrameGoToTests.cs

...9using Xunit.Abstractions;10namespace PuppeteerSharp.Tests.NavigationTests11{12    [Collection(TestConstants.TestFixtureCollectionName)]13    public class FrameGoToTests : PuppeteerPageBaseTest14    {15        public FrameGoToTests(ITestOutputHelper output) : base(output)16        {17        }18        [PuppeteerTest("navigation.spec.ts", "Frame.goto", "should navigate subframes")]19        [SkipBrowserFact(skipFirefox: true)]20        public async Task ShouldNavigateSubFrames()21        {22            await Page.GoToAsync(TestConstants.ServerUrl + "/frames/one-frame.html");23            Assert.Single(Page.Frames.Where(f => f.Url.Contains("/frames/one-frame.html")));24            Assert.Single(Page.Frames.Where(f => f.Url.Contains("/frames/frame.html")));25            var childFrame = Page.FirstChildFrame();26            var response = await childFrame.GoToAsync(TestConstants.EmptyPage);27            Assert.Equal(HttpStatusCode.OK, response.Status);28            Assert.Same(response.Frame, childFrame);29        }...

FrameGoToTests

Using AI Code Generation

1using PuppeteerSharp.Tests.NavigationTests;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions9            {10                {11                }12            });13            var page = await browser.NewPageAsync();14            var frame = page.MainFrame.ChildFrames[0];15            var frame2 = frame.ChildFrames[0];16            var frame3 = frame2.ChildFrames[0];17            await browser.CloseAsync();18        }19    }20}

FrameGoToTests

Using AI Code Generation

1using PuppeteerSharp.Tests.NavigationTests;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });9            var page = await browser.NewPageAsync();10            var frame = await FrameGoToTests.CreateFrame(page);11            await browser.CloseAsync();12        }13    }14}

FrameGoToTests

Using AI Code Generation

1var frame = await Page.MainFrame;2var elementHandle = await frame.QuerySelectorAsync("input[name=q]");3await elementHandle.TypeAsync("PuppeteerSharp");4await elementHandle.PressAsync("Enter");5await frame.WaitForNavigationAsync();6var frame = await Page.MainFrame;7var elementHandle = await frame.QuerySelectorAsync("input[name=q]");8await elementHandle.TypeAsync("PuppeteerSharp");9await elementHandle.PressAsync("Enter");10await frame.WaitForNavigationAsync();11var frame = await Page.MainFrame;12var elementHandle = await frame.QuerySelectorAsync("input[name=q]");13await elementHandle.TypeAsync("PuppeteerSharp");14await elementHandle.PressAsync("Enter");15await frame.WaitForNavigationAsync();16var frame = await Page.MainFrame;17var elementHandle = await frame.QuerySelectorAsync("input[name=q]");18await elementHandle.TypeAsync("PuppeteerSharp");19await elementHandle.PressAsync("Enter");20await frame.WaitForNavigationAsync();21var frame = await Page.MainFrame;22var elementHandle = await frame.QuerySelectorAsync("input[name=q]");23await elementHandle.TypeAsync("PuppeteerSharp");24await elementHandle.PressAsync("Enter");25await frame.WaitForNavigationAsync();26var frame = await Page.MainFrame;27var elementHandle = await frame.QuerySelectorAsync("input[name=q]");28await elementHandle.TypeAsync("PuppeteerSharp");29await elementHandle.PressAsync("Enter");30await frame.WaitForNavigationAsync();

FrameGoToTests

Using AI Code Generation

1using PuppeteerSharp.Tests.NavigationTests;2using System.Threading.Tasks;3{4    {5        static void Main(string[] args)6        {7            FrameGoToTests().Wait();8        }9        static async Task FrameGoToTests()10        {11            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });12            var page = await browser.NewPageAsync();13            var frame = page.MainFrame;14            var frame2 = page.MainFrame;15            await browser.CloseAsync();16        }17    }18}

FrameGoToTests

Using AI Code Generation

1using PuppeteerSharp.Tests.NavigationTests;2using System.Threading.Tasks;3using System;4using System.Net.Http;5using System.Net;6using System.Threading;7using System.IO;8using System.Text;9using Newtonsoft.Json;10using System.Collections.Generic;11using System.Collections;12using System.Linq;13using System.Collections.ObjectModel;14using System.Diagnostics;15using System.Text.RegularExpressions;16using System.Reflection;17using System.Runtime.CompilerServices;18using System.Runtime.InteropServices;

FrameGoToTests

Using AI Code Generation

1using System.Threading.Tasks;2using PuppeteerSharp;3using PuppeteerSharp.Tests.NavigationTests;4using Xunit;5using Xunit.Abstractions;6{7    {8        public FrameGoToTests(ITestOutputHelper output) : base(output)9        {10        }11        public async Task ShouldNavigateSubframes()12        {13            await Page.GoToAsync(TestConstants.ServerUrl + "/frames/one-frame.html");14            Assert.Equal(TestConstants.ServerUrl + "/frames/one-frame.html", Page.Frames[0].Url);15            Assert.Equal(TestConstants.ServerUrl + "/frames/frame.html", Page.Frames[1].Url);16            var response = await Page.Frames[1].GoToAsync(TestConstants.EmptyPage);17            Assert.Equal(TestConstants.EmptyPage, Page.Frames[1].Url);18            Assert.Equal(TestConstants.EmptyPage, response.Url);19        }20    }21}22using System.Threading.Tasks;23using PuppeteerSharp;24using PuppeteerSharp.Tests.NavigationTests;25using Xunit;26using Xunit.Abstractions;27{28    {29        public FrameGoToTests(ITestOutputHelper output) : base(output)30        {31        }32        public async Task ShouldNavigateSubframes()33        {34            await Page.GoToAsync(TestConstants.ServerUrl + "/frames/one-frame.html");35            Assert.Equal(TestConstants.ServerUrl + "/frames/one-frame.html", Page.Frames[0].Url);36            Assert.Equal(TestConstants.ServerUrl + "/frames/frame.html", Page.Frames[1].Url);37            var response = await Page.Frames[1].GoToAsync(TestConstants.EmptyPage);38            Assert.Equal(TestConstants.EmptyPage, Page.Frames[1].Url);39            Assert.Equal(TestConstants.EmptyPage, response.Url);40        }41    }42}

StackOverFlow community discussions

Questions

Discussion

Browser like experience on a .Net Server

PuppeteerSharp throws ChromiumProcessException "Failed to create connection" when launching a browser

Convert HTML string to image

Download image from page with Puppeteersharp

How I can use PuppeteerSharp to click on Cookie Accept Button

download file on the user's side

Why Puppeteer not working in Brave™ portable?

How to generate images of web pages in a high performance environment?

Thread safety of LaunchAsync() in Puppeteer

Can I use the ScreenshotAsync method to save the screenshot to memory instead of disk?

I found the solution to server side rendering of js and css on DOM files with chromium. Chrome can be run as headless providing the capability to render in the backend without it's UI. There's a library than can be used to drive chromium call peppetteer for Node js and PuppeteerSharp for .Net. Under .Net u can get it as Nuget Package and as for Node js its on npm .

https://github.com/kblok/puppeteer-sharp for PuppeteerSharp

https://stackoverflow.com/questions/53570866/browser-like-experience-on-a-net-server

Thanks all for your responses. I used HtmlRenderer external dll (library) to achieve the same and found below code for the same.

Here is the code for this

public void ConvertHtmlToImage()
{
   Bitmap m_Bitmap = new Bitmap(400, 600);
   PointF point = new PointF(0, 0);
   SizeF maxSize = new System.Drawing.SizeF(500, 500);
   HtmlRenderer.HtmlRender.Render(Graphics.FromImage(m_Bitmap),
                                           "<html><body><p>This is some html code</p>"
                                           + "<p>This is another html line</p></body>",
                                            point, maxSize);

   m_Bitmap.Save(@"C:\Test.png", ImageFormat.Png);
}

https://stackoverflow.com/questions/17832304/convert-html-string-to-image

If anyone needs it, here is the code I used below :

        Base64Image img = new Base64Image();            
        using (Page page = await parentPage.Browser.NewPageAsync())
        {                
            var tcs = new TaskCompletionSource();
            page.Response += async (sender, e) =>
            {
                string contentType = null;
                string[] imageMimeTypes = { "image/jpeg", "image/png", "image/webp", "image/gif" };

                if (e.Response.Headers.ContainsKey("content-type"))
                    contentType = (string)e.Response.Headers["content-type"].ToLower();

                if (e.Response.Headers.ContainsKey("Content-Type"))
                    contentType = (string)e.Response.Headers["Content-Type"].ToLower();

                if (imageMimeTypes.Any(t => t == contentType))
                {
                    img.ContentType = contentType;
                    

                    await e.Response.BufferAsync().AsTask().ContinueWith(async (data) => img.Bytes = await data);   
                    tcs.TrySetResult();
                }
            };
            await Task.WhenAll(page.GoToAsync(uri.AbsoluteUri), tcs.Task);
            await page.CloseAsync();
        }
        return img;

https://stackoverflow.com/questions/65372341/download-image-from-page-with-puppeteersharp

I guess you can use the class KnownFolders from here

https://www.codeproject.com/Articles/878605/Getting-All-Special-Folders-in-NET

and then on the client side make something like that

var client = new WebClient();
client.DownloadFile(fileName, Path.Combine(KnownFolders.GetPath(KnownFolder.Downloads), $"{id}.pdf"));

https://stackoverflow.com/questions/72726114/download-file-on-the-users-side

Although there are still many improvements going on, Puppeteer-Sharp is thread-safe. To improve loading performance, there are a few approaches you can take.

Launch one browser and then connect to it

You can launch one (real) browser and then use the ConnectAsync method to connect to it.

await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
    Headless = false,
});

var theBrowser1 = await Puppeteer.ConnectAsync(new ConnectOptions { BrowserWSEndpoint = browser.WebSocketEndpoint });
var theBrowser2 = await Puppeteer.ConnectAsync(new ConnectOptions { BrowserWSEndpoint = browser.WebSocketEndpoint });
var page1 = await theBrowser1.NewPageAsync();
var page2 = await theBrowser2.NewPageAsync();

await Task.WhenAll(
    page1.GoToAsync("https://www.stackoverflow.com"),
    page2.GoToAsync("https://serverfault.com/")
);

I know that code is not running in parallel, but you'll get the idea about reusing the same browser.

Create new pages on the same browser

If you are using TPL, you shouldn't have any issues creating new pages from different threads using the same browser.

await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);
var browser = await Puppeteer.LaunchAsync(new LaunchOptions
{
    Headless = false,
});

var urls = new string[]
{
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com",
    "https://www.stackoverflow.com"
};

await Task.WhenAll(
    urls.Select(url => Task.Factory.StartNew(async () =>
    {
        var page = await browser.NewPageAsync();
        return page.GoToAsync(url);
    })));

Again, this example is just to give you an idea of how this could be accomplished.

Pages queue

There is one user who created a queue of X pages (for x from 0 to X => NewPage) and then he would grab pages from that queue. You can see the example here.

https://stackoverflow.com/questions/54776367/how-to-generate-images-of-web-pages-in-a-high-performance-environment

According to the docs you have ScreenShotDataAsync which returns a byte[]:

byte[] data = await page.ScreenshotDataAsync(scrOpts);

There's also ScreenshotStreamAsync which returns a Stream:

Stream stream = await page.ScreenshotStreamAsync(scrOpts);

https://stackoverflow.com/questions/68904121/can-i-use-the-screenshotasync-method-to-save-the-screenshot-to-memory-instead-of

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