How to use Puppeteer class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.Puppeteer

Methods.cs

Source:Methods.cs

1ï»¿using Yove.Proxy;2using PuppeteerExtraSharp;3using PuppeteerExtraSharp.Plugins.ExtraStealth;4using PuppeteerSharp;5using RuriLib.Attributes;6using RuriLib.Logging;7using RuriLib.Models.Bots;8using System;9using System.Collections.Generic;10using System.Linq;11using System.Threading.Tasks;12using ProxyType = RuriLib.Models.Proxies.ProxyType;13namespace RuriLib.Blocks.Puppeteer.Browser14{15    [BlockCategory("Browser", "Blocks for interacting with a puppeteer browser", "#e9967a")]16    public static class Methods17    {18        [Block("Opens a new puppeteer browser", name = "Open Browser")]19        public static async Task PuppeteerOpenBrowser(BotData data)20        {21            data.Logger.LogHeader();22            // Check if there is already an open browser23            var oldBrowser = data.TryGetObject<PuppeteerSharp.Browser>("puppeteer");24            if (oldBrowser is not null && !oldBrowser.IsClosed)25            {26                data.Logger.Log("The browser is already open, close it if you want to open a new browser", LogColors.DarkSalmon);27                return;28            }29            var args = data.ConfigSettings.PuppeteerSettings.CommandLineArgs;30            if (data.Proxy != null && data.UseProxy)31            {32                if (data.Proxy.Type == ProxyType.Http || !data.Proxy.NeedsAuthentication)33                {34                    args += $" --proxy-server={data.Proxy.Type.ToString().ToLower()}://{data.Proxy.Host}:{data.Proxy.Port}";35                }36                else37                {38                    var proxyType = data.Proxy.Type == ProxyType.Socks5 ? Yove.Proxy.ProxyType.Socks5 : Yove.Proxy.ProxyType.Socks4;39                    var proxyClient = new ProxyClient(40                        data.Proxy.Host, data.Proxy.Port,41                        data.Proxy.Username, data.Proxy.Password, 42                        proxyType);43                    data.SetObject("puppeteer.yoveproxy", proxyClient);44                    args += $" --proxy-server={proxyClient.GetProxy(null).Authority}";45                }46            }47            // Configure the options48            var launchOptions = new LaunchOptions49            {50                Args = new string[] { args },51                ExecutablePath = data.Providers.PuppeteerBrowser.ChromeBinaryLocation,52                Headless = data.ConfigSettings.PuppeteerSettings.Headless,53                DefaultViewport = null // This is important54            };55            // Add the plugins56            var extra = new PuppeteerExtra();57            extra.Use(new StealthPlugin());58            // Launch the browser59            var browser = await extra.LaunchAsync(launchOptions);60            browser.IgnoreHTTPSErrors = data.ConfigSettings.PuppeteerSettings.IgnoreHttpsErrors;61            // Save the browser for further use62            data.SetObject("puppeteer", browser);63            var page = (await browser.PagesAsync()).First();64            SetPageAndFrame(data, page);65            await SetPageLoadingOptions(data, page);66            // Authenticate if the proxy requires auth67            if (data.UseProxy && data.Proxy is { NeedsAuthentication: true, Type: ProxyType.Http } proxy)68                await page.AuthenticateAsync(new Credentials { Username = proxy.Username, Password = proxy.Password });69            data.Logger.Log($"{(launchOptions.Headless ? "Headless " : "")}Browser opened successfully!", LogColors.DarkSalmon);70        }71        [Block("Closes an open puppeteer browser", name = "Close Browser")]72        public static async Task PuppeteerCloseBrowser(BotData data)73        {74            data.Logger.LogHeader();75            var browser = GetBrowser(data);76            await browser.CloseAsync();77            StopYoveProxyInternalServer(data);78            data.Logger.Log("Browser closed successfully!", LogColors.DarkSalmon);79        }80        [Block("Opens a new page in a new browser tab", name = "New Tab")]81        public static async Task PuppeteerNewTab(BotData data)82        {83            data.Logger.LogHeader();84            var browser = GetBrowser(data);85            var page = await browser.NewPageAsync();86            await SetPageLoadingOptions(data, page);87            SetPageAndFrame(data, page); // Set the new page as active88            data.Logger.Log($"Opened a new page", LogColors.DarkSalmon);89        }90        [Block("Closes the currently active browser tab", name = "Close Tab")]91        public static async Task PuppeteerCloseTab(BotData data)92        {93            data.Logger.LogHeader();94            var browser = GetBrowser(data);95            var page = GetPage(data);96            97            // Close the page98            await page.CloseAsync();99            100            // Set the first page as active101            page = (await browser.PagesAsync()).FirstOrDefault();102            SetPageAndFrame(data, page);103            if (page != null)104                await page.BringToFrontAsync();105            data.Logger.Log($"Closed the active page", LogColors.DarkSalmon);106        }107        [Block("Switches to the browser tab with a specified index", name = "Switch to Tab")]108        public static async Task PuppeteerSwitchToTab(BotData data, int index)109        {110            data.Logger.LogHeader();111            var browser = GetBrowser(data);112            var page = (await browser.PagesAsync())[index];113            await page.BringToFrontAsync();114            SetPageAndFrame(data, page);115            data.Logger.Log($"Switched to tab with index {index}", LogColors.DarkSalmon);116        }117        [Block("Reloads the current page", name = "Reload")]118        public static async Task PuppeteerReload(BotData data)119        {120            data.Logger.LogHeader();121            var page = GetPage(data);122            await page.ReloadAsync();123            SwitchToMainFramePrivate(data);124            data.Logger.Log($"Reloaded the page", LogColors.DarkSalmon);125        }126        [Block("Goes back to the previously visited page", name = "Go Back")]127        public static async Task PuppeteerGoBack(BotData data)128        {129            data.Logger.LogHeader();130            var page = GetPage(data);131            await page.GoBackAsync();132            SwitchToMainFramePrivate(data);133            data.Logger.Log($"Went back to the previously visited page", LogColors.DarkSalmon);134        }135        [Block("Goes forward to the next visited page", name = "Go Forward")]136        public static async Task PuppeteerGoForward(BotData data)137        {138            data.Logger.LogHeader();139            var page = GetPage(data);140            await page.GoForwardAsync();141            SwitchToMainFramePrivate(data);142            data.Logger.Log($"Went forward to the next visited page", LogColors.DarkSalmon);143        }144        private static PuppeteerSharp.Browser GetBrowser(BotData data)145            => data.TryGetObject<PuppeteerSharp.Browser>("puppeteer") ?? throw new Exception("The browser is not open!");146        private static PuppeteerSharp.Page GetPage(BotData data)147            => data.TryGetObject<PuppeteerSharp.Page>("puppeteerPage") ?? throw new Exception("No pages open!");148        private static void SwitchToMainFramePrivate(BotData data)149            => data.SetObject("puppeteerFrame", GetPage(data).MainFrame);150        private static void SetPageAndFrame(BotData data, PuppeteerSharp.Page page)151        {152            data.SetObject("puppeteerPage", page);153            SwitchToMainFramePrivate(data);154        }155        private static void StopYoveProxyInternalServer(BotData data)156            => data.TryGetObject<ProxyClient>("puppeteer.yoveproxy")?.Dispose();157        private static async Task SetPageLoadingOptions(BotData data, PuppeteerSharp.Page page)158        {159            await page.SetRequestInterceptionAsync(true);160            page.Request += (sender, e) =>161            {162                // If we only want documents and scripts but the resource is not one of those, block163                if (data.ConfigSettings.PuppeteerSettings.LoadOnlyDocumentAndScript && 164                    e.Request.ResourceType != ResourceType.Document && e.Request.ResourceType != ResourceType.Script)165                {166                    e.Request.AbortAsync();167                }168                // If the url contains one of the blocked urls169                else if (data.ConfigSettings.PuppeteerSettings.BlockedUrls170                    .Where(u => !string.IsNullOrWhiteSpace(u))171                    .Any(u => e.Request.Url.Contains(u, StringComparison.OrdinalIgnoreCase)))172                {173                    e.Request.AbortAsync();174                }175                // Otherwise all good, continue176                else177                {178                    e.Request.ContinueAsync();179                }180            };181            if (data.ConfigSettings.PuppeteerSettings.DismissDialogs)182            {183                page.Dialog += (sender, e) =>184                {185                    data.Logger.Log($"Dialog automatically dismissed: {e.Dialog.Message}", LogColors.DarkSalmon);186                    e.Dialog.Dismiss();187                };188            }189        }190    }191}...

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}");107108                pdfOptions.Width = $"{width}px";109                pdfOptions.Height = $"{height}px";110111                pdfOptions.HeaderTemplate = "";   //é¡µçææ¬112                pdfOptions.Landscape = false;     //çº¸å¼ æ¹å false-åç´ true-æ°´å¹³113                pdfOptions.MarginOptions = new PuppeteerSharp.Media.MarginOptions() { Bottom = "0px", Left = "0px", Right = "0px", Top = "0px" }; //çº¸å¼ è¾¹è·ï¼éè¦è®¾ç½®å¸¦åä½çå¼ï¼é»è®¤å¼æ¯None114                pdfOptions.Scale = 1m;            //PDFç¼©æ¾ï¼ä»0-1115                pdfOptions.PrintBackground = true;116117                var fileName = Environment.CurrentDirectory + $"\\download\\{await page.GetTitleAsync()}.pdf";118119                if (System.IO.File.Exists(fileName))120                {121                    fileName = fileName.Replace(".pdf", $"{DateTime.Now.ToString("ffff")}.pdf");122                }123124                //ä¿åPDF125                await page.PdfAsync(fileName, pdfOptions);126                EMessageBox.Show($"{fileName}ä¿åæå");127
...

ApiFactory.cs

Source:ApiFactory.cs

...4using System.Linq;5using System.Text;6using System.Threading.Tasks;7using Microsoft.Extensions.Logging;8using PuppeteerSharp;9using Weikio.TypeGenerator;10namespace Weikio.ApiFramework.Plugins.Browser11{12    public class ApiFactory13    {14        private readonly ILogger<ApiFactory> _logger;15        public ApiFactory(ILogger<ApiFactory> logger)16        {17            _logger = logger;18        }19        public async Task<List<Type>> Create(BrowserOptions configuration)20        {21            var executablePath = configuration?.ExecutablePath;22            var downloadBrowser = string.IsNullOrWhiteSpace(executablePath) && string.IsNullOrWhiteSpace(configuration?.BrowserWSEndpoint);23            if (downloadBrowser)24            {25                var path = GetBrowserPath();26                _logger.LogDebug("Downloading browser to path {Path}", path);27                28                var browserConfigurationFile = Path.Combine(path, ".browser.config");29                if (File.Exists(browserConfigurationFile))30                {31                    executablePath = await File.ReadAllTextAsync(browserConfigurationFile, Encoding.UTF8);32                    if (!File.Exists(executablePath))33                    {34                        File.Delete(browserConfigurationFile);35                        Directory.Delete(path, true);36                        executablePath = string.Empty;37                        await Task.Delay(TimeSpan.FromMilliseconds(300));38                    }39                }40                if (!File.Exists(browserConfigurationFile))41                {42                    if (!Directory.Exists(path))43                    {44                        Directory.CreateDirectory(path);45                    }46                    var browserFetcherOptions = new BrowserFetcherOptions { Path = path };47                    var browserFetcher = new BrowserFetcher(browserFetcherOptions);48                    await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision).ConfigureAwait(false);49                    executablePath = browserFetcher.GetExecutablePath(BrowserFetcher.DefaultRevision);50                    await File.WriteAllTextAsync(browserConfigurationFile, executablePath, Encoding.UTF8);51                    await Task.Delay(TimeSpan.FromMilliseconds(300));52                }53                executablePath = await File.ReadAllTextAsync(browserConfigurationFile, Encoding.UTF8);54            }55            var code = string.Empty;56            if (!string.IsNullOrWhiteSpace(executablePath))57            {58                if (!File.Exists(executablePath))59                {60                    throw new ArgumentException($"Can not use executable as the browser. File {executablePath} not found.");61                }62                _logger.LogDebug("Using locally installed Chromium based browser");63                var sourceWriter = new StringBuilder();64                sourceWriter.UsingNamespace("System.Threading.Tasks");65                sourceWriter.UsingNamespace("PuppeteerSharp");66                sourceWriter.Namespace("Weikio.ApiFramework.Plugins.Browser");67                sourceWriter.StartClass($"ExecutableBrowser : WebBrowser");68                sourceWriter.WriteLine($"private readonly string _executablePath = @\"{executablePath}\";");69                sourceWriter.Write(70                    "protected override async Task<PuppeteerSharp.Browser> GetBrowser() { var launchOptions = new LaunchOptions() { Headless = true, ExecutablePath = _executablePath };var result = await Puppeteer.LaunchAsync(launchOptions); return result; }");71                sourceWriter.FinishBlock(); // Finish the class72                sourceWriter.FinishBlock(); // Finish the namespace73                code = sourceWriter.ToString();74            }75            else76            {77                _logger.LogDebug("Using remote browser");78                var sourceWriter = new StringBuilder();79                sourceWriter.UsingNamespace("System.Threading.Tasks");80                sourceWriter.UsingNamespace("PuppeteerSharp");81                sourceWriter.Namespace("Weikio.ApiFramework.Plugins.Browser");82                sourceWriter.StartClass($"RemoteBrowser : WebBrowser");83                sourceWriter.WriteLine($"private readonly string _browserWSEndpoint = \"{configuration?.BrowserWSEndpoint}\";");84                sourceWriter.Write(85                    "protected override async Task<PuppeteerSharp.Browser> GetBrowser() { var connectOptions = new ConnectOptions() { BrowserWSEndpoint = _browserWSEndpoint };var result = await Puppeteer.ConnectAsync(connectOptions); return result; }");86                sourceWriter.FinishBlock(); // Finish the class87                sourceWriter.FinishBlock(); // Finish the namespace88                code = sourceWriter.ToString();89            }90            var generator = new CodeToAssemblyGenerator();91            generator.ReferenceAssemblyContainingType<WebBrowser>();92            generator.ReferenceAssemblyContainingType<PuppeteerSharp.Browser>();93            var assembly = generator.GenerateAssembly(code);94            var result = assembly.GetExportedTypes()95                .ToList();96            return result;97        }98        public static string GetBrowserPath()99        {100            return Path.Combine(Path.GetTempPath(), "ApiFramework_Browser");101        }102    }103}...

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

...3namespace web_browser_csharp4{5    class Program6    {7        static PuppeteerSharp.Browser browser;8        static PuppeteerSharp.Page browserPage;9        static Action<string> callbackFromBrowserDelegate;10        static string UserDataDirPath() =>11            System.IO.Path.Combine(Environment.GetEnvironmentVariable("LOCALAPPDATA"), "bot", "web-browser", "user-data");12        static void Main(string[] args)13        {14            /*15            2020-02-17 Observation before introducing the killing of previous web browser processes:16            LaunchAsync failed if a process from the last run was still present.17            (See report of this issue at https://forum.botengine.org/t/farm-manager-tribal-wars-2-farmbot/3038/32?u=viir)18            Unhandled exception. System.AggregateException: One or more errors occurred. (Failed to launch Chromium! [28592:33396:0217/074915.470:ERROR:cache_util_win.cc(21)] Unable to move the cache: Access is denied. (0x5)19            [28592:33396:0217/074915.471:ERROR:cache_util.cc(141)] Unable to move cache folder C:\Users\John\AppData\Local\bot\web-browser\user-data\ShaderCache\GPUCache to C:\Users\John\AppData\Local\bot\web-browser\user-data\ShaderCache\old_GPUCache_00020            [28592:33396:0217/074915.471:ERROR:disk_cache.cc(178)] Unable to create cache21            [28592:33396:0217/074915.471:ERROR:shader_disk_cache.cc(601)] Shader Cache Creation failed: -222            [28592:33396:0217/074915.473:ERROR:browser_gpu_channel_host_factory.cc(138)] Failed to launch GPU process.23            )24            ---> PuppeteerSharp.ChromiumProcessException: Failed to launch Chromium! [28592:33396:0217/074915.470:ERROR:cache_util_win.cc(21)] Unable to move the cache: Access is denied. (0x5)25            [28592:33396:0217/074915.471:ERROR:cache_util.cc(141)] Unable to move cache folder C:\Users\John\AppData\Local\bot\web-browser\user-data\ShaderCache\GPUCache to C:\Users\John\AppData\Local\bot\web-browser\user-data\ShaderCache\old_GPUCache_00026            [28592:33396:0217/074915.471:ERROR:disk_cache.cc(178)] Unable to create cache27            [28592:33396:0217/074915.471:ERROR:shader_disk_cache.cc(601)] Shader Cache Creation failed: -228            [28592:33396:0217/074915.473:ERROR:browser_gpu_channel_host_factory.cc(138)] Failed to launch GPU process.29            at PuppeteerSharp.ChromiumProcess.State.StartingState.StartCoreAsync(ChromiumProcess p)30            at PuppeteerSharp.ChromiumProcess.State.StartingState.StartCoreAsync(ChromiumProcess p)31            at PuppeteerSharp.Launcher.LaunchAsync(LaunchOptions options)32            at PuppeteerSharp.Launcher.LaunchAsync(LaunchOptions options)33            */34            KillPreviousWebBrowserProcesses();35            StartWebBrowser().Wait();36        }37        static void KillPreviousWebBrowserProcesses()38        {39            var matchingProcesses =40                System.Diagnostics.Process.GetProcesses()41                /*42                2020-02-1743                .Where(process => process.StartInfo.Arguments.Contains(UserDataDirPath(), StringComparison.InvariantCultureIgnoreCase))44                */45                .Where(ProcessIsWebBrowser)46                .ToList();47            foreach (var process in matchingProcesses)48            {49                if (process.HasExited)50                    continue;51                process.Kill();52            }53        }54        static bool ProcessIsWebBrowser(System.Diagnostics.Process process)55        {56            try57            {58                return process.MainModule.FileName.Contains(".local-chromium");59            }60            catch61            {62                return false;63            }64        }65        static async System.Threading.Tasks.Task StartWebBrowser()66        {67            await new PuppeteerSharp.BrowserFetcher().DownloadAsync(PuppeteerSharp.BrowserFetcher.DefaultRevision);68            browser = await PuppeteerSharp.Puppeteer.LaunchAsync(new PuppeteerSharp.LaunchOptions69            {70                Headless = false,71                UserDataDir = UserDataDirPath(),72                DefaultViewport = null,73            });74            browserPage = (await browser.PagesAsync()).FirstOrDefault() ?? await browser.NewPageAsync();75            await browserPage.ExposeFunctionAsync("____callback____", (string returnValue) =>76            {77                callbackFromBrowserDelegate?.Invoke(returnValue);78                return 0;79            });80        }81    }82}...

PuppeteerBrowser.cs

Source:PuppeteerBrowser.cs

1ï»¿using PuppeteerSharp;2using System;3namespace HlidacStatu.Util.WebShot4{5    public class PuppeteerBrowser : IDisposable6    {7        static PuppeteerBrowser()8        {9            new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision).Wait();10        }11        public static Devmasters.Core.Logging.Logger logger = new Devmasters.Core.Logging.Logger("HlidacStatu.Util.Webshots");12        private static readonly PuppeteerBrowser theOnlyInstance = new PuppeteerBrowser("theOnlyInstance");13        public static PuppeteerBrowser TheOnlyStaticInstance14        {15            get16            {17                return theOnlyInstance;18            }19        }20        PuppeteerSharp.Browser browser = null;21        PuppeteerSharp.Page page = null;22        int width = 00;23        int height = 0;24        public string Name { get; set; } = null;25        public PuppeteerBrowser(string name = null)26            : this(1920, 1080, name)27        {28        }29        public PuppeteerBrowser(int displaywidth, int displayheight, string name = null)30        {31            this.width = displaywidth;32            this.height = displayheight;33            this.Name = "PuppeteerBrowser-" + (name ?? Devmasters.Core.TextUtil.GenRandomString(10));34            Init();35        }36        private void Init()37        {38            logger.Debug($"{this.Name}: Initiating PuppeteerBrowser");39            var chromeBinaryFileName = Devmasters.Core.Util.Config.GetConfigValue("ChromeBinaryFullPath");40            var launchOptions = new LaunchOptions()41            {42                Headless = true,43                DefaultViewport = new ViewPortOptions()44                {45                    DeviceScaleFactor = 1,46                    IsLandscape = false,47                    HasTouch = false,48                    IsMobile = false,49                    Height = this.height,50                    Width = this.width,51                }52            };53            if (!string.IsNullOrEmpty(chromeBinaryFileName))54                launchOptions.ExecutablePath = chromeBinaryFileName;55            this.browser = Puppeteer.LaunchAsync(launchOptions).Result;56            this.page = browser.NewPageAsync().Result;57            logger.Info($"{this.Name}: Initiated PuppeteerBrowser");58        }59        object browserLock = new object();60        public PuppeteerSharp.Page Page()61        {62                return this.page;63        }64        public void WarmUp()65        {66            logger.Debug($"{this.Name}: Warming up");67            this.page.GoToAsync("https://www.google.com").Wait();68        }69        internal void RecreatedChrome()70        {71            logger.Info($"{this.Name}: Recreating PuppeteerBrowser");72            lock (browserLock)73            {74                this.page.Dispose();75                this.browser.CloseAsync().Wait();76            }77            System.Threading.Thread.Sleep(500);78            Init();79        }80        #region IDisposable Support81        private bool disposedValue = false; // To detect redundant calls82        protected virtual void Dispose(bool disposing)83        {84            logger.Info($"{this.Name}: Disposing PuppeteerBrowser Instance");85            if (!disposedValue)86            {87                if (disposing)88                {89                    // TODO: dispose managed state (managed objects).90                }91                logger.Debug($"{this.Name}: Closing PuppeteerBrowser");92                this.browser.CloseAsync().Wait();93                logger.Debug($"{this.Name}: Closed PuppeteerBrowser");94                // TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.95                // TODO: set large fields to null.96                disposedValue = true;97            }98        }99        // TODO: override a finalizer only if Dispose(bool disposing) above has code to free unmanaged resources.100        ~PuppeteerBrowser()101        {102            // Do not change this code. Put cleanup code in Dispose(bool disposing) above.103            Dispose(false);104        }105        // This code added to correctly implement the disposable pattern.106        public void Dispose()107        {108            // Do not change this code. Put cleanup code in Dispose(bool disposing) above.109            Dispose(true);110            // TODO: uncomment the following line if the finalizer is overridden above.111            GC.SuppressFinalize(this);112        }113        #endregion114    }...

PuppeteerUtility.csx

Source:PuppeteerUtility.csx

1#r "nuget:PuppeteerSharp, 1.18.0"2using PuppeteerSharp;3public static class PuppeteerUtility{4    private static string findChrome(){5        var chromeProcs = System.Diagnostics.Process.GetProcessesByName("chrome");6        if( !chromeProcs.Any()){7            throw new Exception("Chrome must be running for this code to find it");8        }9        return chromeProcs.First().Modules[0].FileName;10    }11    public async static Task<PageResult> GetPage(){12        var browser = await Puppeteer.LaunchAsync(new LaunchOptions13        {14            Headless = false,15            ExecutablePath = findChrome(),16            Args = new[]{ "--app=http://localhost/null" }17        });18        var page = (await browser.PagesAsync())[0];19        //await page.WaitForNavigationAsync();20        return new PageResult{21            Browser = browser, // they may need the browser to close it after they are done22            Page = page23        };24    }25    26}27public class PageResult {28    public PuppeteerSharp.Browser Browser {get; set; }29    public PuppeteerSharp.Page Page {get; set; }30    /*31    For deconstruct in dotnet see this: https://docs.microsoft.com/en-us/dotnet/csharp/deconstruct32    */33    public void Deconstruct(out PuppeteerSharp.Page page,34                            out PuppeteerSharp.Browser browser){35        page = this.Page;36        browser = this.Browser;37    }38}...

PuppeteerDocumentGenerator.cs

Source:PuppeteerDocumentGenerator.cs

1ï»¿using PuppeteerSharp;2using PuppeteerSharp.Media;3using System.Threading.Tasks;4namespace PuppetPdf5{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 MarginOptions25                    {...

Puppeteer

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9            var browser = await Puppeteer.LaunchAsync(new LaunchOptions10            {11                ExecutablePath = "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe"12            });13            var page = await browser.NewPageAsync();14            await page.ScreenshotAsync("C:\\Users\\Public\\Documents\\PuppeteerSharp\\screenshot.png");15            await browser.CloseAsync();16            Console.WriteLine("Done");17            Console.ReadLine();18        }19    }20}21using PuppeteerSharp;22using System;23using System.Threading.Tasks;24{25    {26        static async Task Main(string[] args)27        {28            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);29            var browser = await Puppeteer.LaunchAsync(new LaunchOptions30            {31                ExecutablePath = "C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe"32            });33            var page = await browser.NewPageAsync();34            await page.ScreenshotAsync("C:\\Users\\Public\\Documents\\PuppeteerSharp\\screenshot.png");35            await browser.CloseAsync();36            Console.WriteLine("Done");37            Console.ReadLine();38        }39    }40}

Puppeteer

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            {9                Args = new string[] { "--no-sandbox", "--disable-setuid-sandbox" }10            };11            using (var browser = await Puppeteer.LaunchAsync(options))12            {13                using (var page = await browser.NewPageAsync())14                {15                    await page.ScreenshotAsync("google.png");16                }17            }18        }19    }20}21    <RunCommandArguments>run --rm --volume ${workspaceFolder}:/app/ --workdir /app/ mcr.microsoft.com/dotnet/core/sdk:2.1 dotnet run</RunCommandArguments>22    <RunCommandArguments>run --rm --volume ${workspaceFolder}:/app/ --workdir /app/ mcr.microsoft.com/dotnet/core/sdk:2.1 dotnet run</RunCommandArguments>23{24        {25            "name": ".NET Core Launch (console)",

Puppeteer

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.IO;4using System.Threading.Tasks;5{6    {7        static void Main(string[] args)8        {9            Console.WriteLine("Hello World!");10            CapturePage().Wait();11        }12        private static async Task CapturePage()13        {14            {15                ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",16            };17            using (var browser = await Puppeteer.LaunchAsync(options))18            {19                var page = await browser.NewPageAsync();20                await page.ScreenshotAsync("google.png");21            }22        }23    }24}

Puppeteer

Using AI Code Generation

1{2    {3        static void Main(string[] args)4        {5            Console.WriteLine("Hello World!");6        }7    }8}9{10    {11        static void Main(string[] args)12        {13            Console.WriteLine("Hello World!");14        }15    }16}17{18    {19        static void Main(string[] args)20        {21            Console.WriteLine("Hello World!");22        }23    }24}25{26    {27        static void Main(string[] args)28        {29            Console.WriteLine("Hello World!");30        }31    }32}33{34    {35        static void Main(string[] args)36        {37            Console.WriteLine("Hello World!");38        }39    }40}41{42    {43        static void Main(string[] args)44        {45            Console.WriteLine("Hello World!");46        }47    }48}49{50    {51        static void Main(string[] args)52        {53            Console.WriteLine("Hello World!");54        }55    }56}57{58    {59        static void Main(string[] args)60        {61            Console.WriteLine("Hello World!");62        }63    }64}65{66    {67        static void Main(string[] args)68        {69            Console.WriteLine("Hello World!");70        }71    }72}73{74    {

Puppeteer

Using AI Code Generation

1using PuppeteerSharp;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            var page = await browser.NewPageAsync();12            await page.WaitForSelectorAsync("input[name='q']");13            await page.TypeAsync("input[name='q']", "PuppeteerSharp");14            await page.Keyboard.PressAsync("Enter");15            await page.WaitForSelectorAsync("div.g");16            var result = await page.EvaluateExpressionAsync<string>("document.querySelector('div.g').innerText");17            Console.WriteLine(result);18            Console.ReadLine();19            await browser.CloseAsync();20        }21    }22}23Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "2", "2.csproj", "{A1E0A9A9-6A5D-4A23-9E2E-2A5D5A8B0B5E}"24	GlobalSection(SolutionConfigurationPlatforms) = preSolution

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