Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use BrowserFetcher class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.BrowserFetcher

SaveWebPage.xaml.cs

Source:SaveWebPage.xaml.cs

...33        {34            //å¦æè¿ä¸æ¥åçå¼å¸¸äºï¼å¯ä»¥åè https://www.cnblogs.com/zhaotianff/p/13528507.html35            try36            {37                await new PuppeteerSharp.BrowserFetcher().DownloadAsync(PuppeteerSharp.BrowserFetcher.DefaultRevision);3839                var browser = await PuppeteerSharp.Puppeteer.LaunchAsync(new PuppeteerSharp.LaunchOptions40                {41                    Headless = true42                });4344                var page = await browser.NewPageAsync();  //æå¼ä¸ä¸ªæ°æ ç¾45                await page.GoToAsync(this.tbox_Url.Text); //è®¿é®é¡µé¢4647                //è®¾ç½®æªå¾éé¡¹48                PuppeteerSharp.ScreenshotOptions screenshotOptions = new PuppeteerSharp.ScreenshotOptions();49                //screenshotOptions.Clip = new PuppeteerSharp.Media.Clip() { Height = 0, Width = 0, X = 0, Y = 0 };//è®¾ç½®æªåªåºå50                screenshotOptions.FullPage = true; //æ¯å¦æªåæ´ä¸ªé¡µé¢51                screenshotOptions.OmitBackground = false;//æ¯å¦ä½¿ç¨éæèæ¯ï¼èä¸æ¯é»è®¤ç½è²èæ¯52                screenshotOptions.Quality = 100; //æªå¾è´¨é 0-100ï¼pngä¸å¯ç¨ï¼53                screenshotOptions.Type = PuppeteerSharp.ScreenshotType.Jpeg; //æªå¾æ ¼å¼5455                var fileName = Environment.CurrentDirectory + $"\\download\\{await page.GetTitleAsync()}.jpg";5657                if (System.IO.File.Exists(fileName))58                {59                    fileName = fileName.Replace(".jpg", $"{DateTime.Now.ToString("ffff")}.jpg");60                }6162                await page.ScreenshotAsync(fileName, screenshotOptions);6364                if (System.IO.File.Exists(fileName))65                {66                    BitmapImage bi = new BitmapImage();67                    bi.BeginInit();68                    bi.UriSource = new Uri(fileName, UriKind.Absolute);69                    bi.EndInit();70                    this.image.Source = bi;71                }72                else73                {74                    EMessageBox.Show("ä¿åç½é¡µæªå¾å¤±è´¥");75                }7677                //å¨æåè®°å¾å³éæµè§å¨åéæ¾èµæº78                browser.Disconnect();79                browser.Dispose();80            }81            catch(Exception ex)82            {83                EMessageBox.Show(ex.Message);84            }85        }8687        private async void btn_SaveAsPDF_Click(object sender, RoutedEventArgs e)88        {89            //æå¼ç½é¡µçæä½è·ä¸é¢æ¯ä¸æ ·ç90            try91            {92                await new PuppeteerSharp.BrowserFetcher().DownloadAsync(PuppeteerSharp.BrowserFetcher.DefaultRevision);93                var browser = await PuppeteerSharp.Puppeteer.LaunchAsync(new PuppeteerSharp.LaunchOptions94                {95                    Headless = true96                });97                var page = await browser.NewPageAsync();  //æå¼ä¸ä¸ªæ°æ ç¾98                await page.GoToAsync(this.tbox_Url.Text); //è®¿é®é¡µé¢99100                //è®¾ç½®PDFéé¡¹101                PuppeteerSharp.PdfOptions pdfOptions = new PuppeteerSharp.PdfOptions();102                pdfOptions.DisplayHeaderFooter = false; //æ¯å¦æ¾ç¤ºé¡µçé¡µè103                pdfOptions.FooterTemplate = "";   //é¡µèææ¬104105                var width = await page.EvaluateFunctionAsync<int>("function getWidth(){return document.body.scrollWidth}");106                var height = await page.EvaluateFunctionAsync<int>("function getHeight(){return document.body.scrollHeight}");
...

GeneratePdf.cs

Source:GeneratePdf.cs

...52                name = $"{name}.pdf";53            try54            {55                // create a browserfetcher object which will handle the downloading of the chrome browser image56                using var browserFetcher = new BrowserFetcher(new BrowserFetcherOptions()57                {58                    // for azure functions, we need to use the temp path so we don't get a permission issue59                    Path = Path.GetTempPath()60                }) ;61                // download the browser image62                await browserFetcher.DownloadAsync();63                // launch the browser in headless mode from the temp dir we downloaded the image to64                await using var browser = await Puppeteer.LaunchAsync(new LaunchOptions { 65                    Headless = true,66                    ExecutablePath = browserFetcher.RevisionInfo(BrowserFetcher.DefaultChromiumRevision).ExecutablePath67                });68                // create a new page69                await using var page = await browser.NewPageAsync();70                await page.GoToAsync(url, WaitUntilNavigation.Networkidle0); // In case of fonts being loaded from a CDN, use WaitUntilNavigation.Networkidle0 as a second param.71                // change the viewport to the width of your choosing72                await page.SetViewportAsync(new ViewPortOptions73                {74                    DeviceScaleFactor = 1,75                    Width = width,76                    Height = 108077                });78                // dimensions = await page.EvaluateExpressionAsync<string>(jsWidth);79                await page.EvaluateExpressionHandleAsync("document.fonts.ready"); // Wait for fonts to be loaded. Omitting this might result in no text rendered in pdf.80                // use the screen mode for viewing the web page...

Form1.cs

Source:Form1.cs

...18            InitializeComponent();19        }20        private async void button1_Click(object sender, EventArgs e)21        {                      22            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);23            browser = await Puppeteer.LaunchAsync(new LaunchOptions24            {25                Headless = true26            });27            //å¦æawait new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);æ§è¡ä¸æå28            //å¯ä»¥æå¨è®¿é®https://commondatastorage.googleapis.com/chromium-browser-snapshots/index.html?prefix=Win_x64/ï¼ä¸è½½Chromiumæµè§å¨ï¼å¹¶è§£åå°æå®ä½ç½®29            //åéè¿ä»¥ä¸ä»£ç åå§å30            /*31             * LaunchOptions options = new LaunchOptions();32            options.Headless = true;33            options.DefaultViewport = null;34            //å¿½ç¥è¯ä¹¦éè¯¯35            options.IgnoreHTTPSErrors = true;36            //chromePathå°±æ¯ä¸è½½çChromiumæµè§å¨è§£åçä½ç½®          37             options.ExecutablePath = chromePath;38            browser = await Puppeteer.LaunchAsync(options);39            */40            var page = await browser.NewPageAsync();41            await page.GoToAsync(this.textBox1.Text);...

GistGithubService.cs

Source:GistGithubService.cs

...9    class GistGithubService : IGistGithubService10    {11        private readonly GitHubClient client =12            new GitHubClient(new ProductHeaderValue("Patrick-Star-Helper"));13        private readonly PuppeteerSharp.BrowserFetcher browserFetcher =14            new PuppeteerSharp.BrowserFetcher();15        private readonly GitHubModel gitHubModel;16        public bool IsAuthenticated { get; private set; }17        private readonly ICredentialStore credentialStore;18        public GistGithubService(19            IAppConfigProvider configProvider,20            ICredentialStore credentialStore)21        {22            this.credentialStore = credentialStore;23            gitHubModel = configProvider.Configuration.GitHub!;24            browserFetcher.DownloadProgressChanged += Fetcher_DownloadProgressChanged;25        }26        private void Fetcher_DownloadProgressChanged(object sender, System.Net.DownloadProgressChangedEventArgs e)27        {28            Console.WriteLine("Downloading Chromium: {0}%", e.ProgressPercentage);29        }30        public async Task<bool> Authenticate()31        {32            var accessToken = await credentialStore.LoadAccessToken();33            //if (!string.IsNullOrEmpty(accessToken))34            //{35            //    IsAuthenticated = true;36            //    client.Credentials = new Credentials(accessToken);37            //    return true;38            //}39            var loginRequest = new OauthLoginRequest(gitHubModel.ClientId);40            foreach (var scope in gitHubModel.Scopes!)41                loginRequest.Scopes.Add(scope);42            var redirectPage = client.Oauth.GetGitHubLoginUrl(loginRequest);43            client.Credentials = await FetchGitCredential(redirectPage);44            await credentialStore.StoreAccessToken(client.Credentials.GetToken());45            IsAuthenticated = true;46            return true;47        }48        public async Task<string?> Create(GistModel gist)49        {50            try51            {52                var result = await client.Gist.Create(new NewGist53                {54                    Files =55                    {56                        [gist.Name] = gist.Content57                    },58                    Description = gist.Description59                });60                return result?.Id;61            }62            catch (Exception ex)63            {64                var msg = ex.Message;65                throw;66            }67        }68        public async Task<string?> Update(string id, GistModel gist)69        {70            var result = await client.Gist.Edit(id, new GistUpdate71            {72                Files =73                {74                    [gist.Name] = new GistFileUpdate75                    {76                        Content = gist.Content77                    }78                },79                Description = gist.Description80            });81            return result?.Id;82        }83        public async Task<GistModel?> Find(string id)84        {85            var result = await client.Gist.Get(id);86            if (result != null)87            {88                var firstEntry = result.Files.FirstOrDefault();89                return new GistModel(firstEntry.Value.Filename, firstEntry.Value.Content)90                {91                };92            }93            return null;94        }95        private async Task<Credentials> FetchGitCredential(Uri redirectPage)96        {97            var targetUrl = await GetRedirectCallbackResult(redirectPage);98            var queryString = QueryStringHelper.ToDictionary(targetUrl);99            var code = queryString[gitHubModel.TargetRedirectKey!];100            var result = await client.Oauth.CreateAccessToken(101                new OauthTokenRequest(gitHubModel.ClientId, gitHubModel.ClientSecret, code));102            return new Credentials(result.AccessToken);103        }104        private async Task<Uri> GetRedirectCallbackResult(Uri redirectPage)105        {106            var revisionInfo = await browserFetcher107                .DownloadAsync(PuppeteerSharp.BrowserFetcher.DefaultRevision);108            using var browser = await PuppeteerSharp.Puppeteer.LaunchAsync(new PuppeteerSharp.LaunchOptions109            {110                Headless = false,111                LogProcess = true,112                DumpIO = true113            });114            var page = await browser.NewPageAsync();115            var redirectResult = await page.GoToAsync(redirectPage.AbsoluteUri);116            var target = await browser.WaitForTargetAsync(e => e.Url.Contains(gitHubModel.RedirectUrl!));117            return new Uri(target.Url);118        }119    }120}...

Program.cs

Source:Program.cs

...66        }67    }68    static async System.Threading.Tasks.Task StartWebBrowser()69    {70        var browserRevision = PuppeteerSharp.BrowserFetcher.DefaultChromiumRevision;71        var browserFetcher = new PuppeteerSharp.BrowserFetcher(new PuppeteerSharp.BrowserFetcherOptions72        {73            Path = BrowserDownloadDirPath()74        });75        await browserFetcher.DownloadAsync(browserRevision);76        browser = await PuppeteerSharp.Puppeteer.LaunchAsync(new PuppeteerSharp.LaunchOptions77        {78            Headless = false,79            UserDataDir = UserDataDirPath("default"),80            DefaultViewport = null,81            ExecutablePath = browserFetcher.RevisionInfo(browserRevision).ExecutablePath,82        });83        browserPage = (await browser.PagesAsync()).FirstOrDefault() ?? await browser.NewPageAsync();84        await browserPage.ExposeFunctionAsync("____callback____", (string returnValue) =>85        {...

PuppeteerGenerator.cs

Source:PuppeteerGenerator.cs

...85			return $"<div style=\"font-size:10px !important; color:#808080; padding-left:10px; text-align:'center'; width: 95%; \"  >{string.Concat(list)}</div>";86		}87		// check if puppeteer exists locally. Download if not88		private static async Task<string> DownloadPuppeteerToPath(string path) {89			var downloadPath = path.Replace($"Win64-{BrowserFetcher.DefaultRevision}\\", "");90			var fetcherOptions = new BrowserFetcherOptions { Path = downloadPath, Platform = Platform.Win64 };91			BrowserFetcher browserFetcher = new BrowserFetcher(fetcherOptions);92			var revs = browserFetcher.LocalRevisions();93			// download if not existing in local94			if (revs == null || !revs.Any())95				await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);96			return browserFetcher.GetExecutablePath(BrowserFetcher.DefaultRevision);97		}98	}99}...

BrowserProvider.cs

Source:BrowserProvider.cs

...33        }34        if (string.IsNullOrEmpty(Environment.GetEnvironmentVariable("PUPPETEER_EXECUTABLE_PATH")))35        {36            logger.LogDebug("Download browser");37            using var browserFetcher = new BrowserFetcher(Options.Product);38            if (!string.IsNullOrEmpty(Options.Revision))39            {40                await browserFetcher.DownloadAsync(Options.Revision);41            }42            else43            {44                await browserFetcher.DownloadAsync();45            }46            logger.LogDebug("Browser downloaded");47        }48        logger.LogInformation("Start new Browser");49        return await PuppeteerSharp.Puppeteer.LaunchAsync(50            new LaunchOptions51            {...

PuppeteerDocumentGenerator.cs

Source:PuppeteerDocumentGenerator.cs

...6    public class PuppeteerDocumentGenerator : DocumentGeneratorBase7    {8        public async Task<byte[]> Generate(string html)9        {10            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);11            var browser = await Puppeteer.LaunchAsync(new LaunchOptions12            {13                Headless = true,14                // If needed, we can specify a specific version of Chrome15                //ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",16                //IgnoredDefaultArgs = new string[] { "--disable-extensions" },17                //IgnoreDefaultArgs = true,18            });19            using (var page = await browser.NewPageAsync())20            {21                await page.SetContentAsync(html);22                var pdfData = await page.PdfDataAsync(new PdfOptions23                {24                    MarginOptions = new MarginOptions...

BrowserFetcher

Using AI Code Generation

1var browserFetcher = new BrowserFetcher();2await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);3var browser = await Puppeteer.LaunchAsync(new LaunchOptions4{5    ExecutablePath = browserFetcher.GetExecutablePath(BrowserFetcher.DefaultRevision)6});7var page = await browser.NewPageAsync();8await page.ScreenshotAsync("google.png");9await browser.CloseAsync();10var browser = await Puppeteer.LaunchAsync(new LaunchOptions11{12});13var page = await browser.NewPageAsync();14await page.ScreenshotAsync("google.png");15await browser.CloseAsync();16var browser = await Puppeteer.LaunchAsync(new LaunchOptions17{18});19var page = await browser.NewPageAsync();20await page.ScreenshotAsync("google.png");21await browser.CloseAsync();22var browser = await Puppeteer.LaunchAsync(new LaunchOptions23{24});25var page = await browser.NewPageAsync();26await page.ScreenshotAsync("google.png");27await browser.CloseAsync();28var browser = await Puppeteer.LaunchAsync(new LaunchOptions29{30});31var page = await browser.NewPageAsync();32await page.ScreenshotAsync("google.png");33await browser.CloseAsync();34var browser = await Puppeteer.LaunchAsync(new LaunchOptions35{36});37var page = await browser.NewPageAsync();38await page.ScreenshotAsync("google.png");39await browser.CloseAsync();

BrowserFetcher

Using AI Code Generation

1var browserFetcher = new BrowserFetcher();2await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);3var browser = await Puppeteer.LaunchAsync(new LaunchOptions4{5    ExecutablePath = browserFetcher.GetExecutablePath(BrowserFetcher.DefaultRevision)6});7var page = await browser.NewPageAsync();8await page.ScreenshotAsync("google.png");9await browser.CloseAsync();

BrowserFetcher

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static async Task Main(string[] args)7        {8            var browserFetcher = new BrowserFetcher();9            var revisionInfo = await browserFetcher.DownloadAsync();10            var browser = await Puppeteer.LaunchAsync(new LaunchOptions11            {12            });13            var page = await browser.NewPageAsync();14            await page.ScreenshotAsync("google.png");15            await browser.CloseAsync();16        }17    }18}

BrowserFetcher

Using AI Code Generation

1using System;2using System.IO;3using System.Threading.Tasks;4using PuppeteerSharp;5{6    {7        static async Task Main(string[] args)8        {9            var browserFetcher = new BrowserFetcher();10            var revisionInfo = browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision).Result;11            var browser = await Puppeteer.LaunchAsync(new LaunchOptions12            {13            });14            var page = await browser.NewPageAsync();15            await page.ScreenshotAsync("google.png");16            await browser.CloseAsync();17        }18    }19}

BrowserFetcher

Using AI Code Generation

1var browserFetcher = new BrowserFetcher();2await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);3{4};5var browser = await Puppeteer.LaunchAsync(options);6{7};8var browser = await Puppeteer.LaunchAsync(options);9var page = await browser.NewPageAsync();10await page.ScreenshotAsync("google.png");11{12};13var browser = await Puppeteer.LaunchAsync(options);14var page = await browser.NewPageAsync();15await page.ScreenshotAsync("google.png");16await browser.CloseAsync();17{18};19var browser = await Puppeteer.LaunchAsync(options);20var page = await browser.NewPageAsync();21await page.ScreenshotAsync("google.png");22await browser.CloseAsync();23{24};25var browser = await Puppeteer.LaunchAsync(options);26var page = await browser.NewPageAsync();27await page.ScreenshotAsync("google.png");28await browser.CloseAsync();

BrowserFetcher

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.IO;4using System.Threading.Tasks;5{6    {7        static async Task Main(string[] args)8        {9            var browserFetcher = new BrowserFetcher();10            var revisionInfo = await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);11            var browser = await Puppeteer.LaunchAsync(new LaunchOptions12            {13            });14            var page = await browser.NewPageAsync();15            Console.ReadLine();16            await browser.CloseAsync();17        }18    }19}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.