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How to use EnsureSingleLaunchOrConnect method of PuppeteerSharp.Launcher class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Launcher.EnsureSingleLaunchOrConnect

Launcher.cs

Source:Launcher.cs

...41        /// <a href="https://chromium.googlesource.com/chromium/src/+/lkcr/docs/chromium_browser_vs_google_chrome.md">This article</a> describes some differences for Linux users.42        /// </remarks>43        public async Task<Browser> LaunchAsync(LaunchOptions options)44        {45            EnsureSingleLaunchOrConnect();46            var chromiumExecutable = GetOrFetchChromeExecutable(options);47            Process = new ChromiumProcess(chromiumExecutable, options, _loggerFactory);48            try49            {50                await Process.StartAsync().ConfigureAwait(false);51                try52                {53                    var connection = await Connection54                        .Create(Process.EndPoint, options, _loggerFactory)55                        .ConfigureAwait(false);56                    var browser = await Browser57                        .CreateAsync(connection, Array.Empty<string>(), options.IgnoreHTTPSErrors, options.DefaultViewport, Process)58                        .ConfigureAwait(false);59                    await EnsureInitialPageAsync(browser).ConfigureAwait(false);60                    return browser;61                }62                catch (Exception ex)63                {64                    throw new ChromiumProcessException("Failed to create connection", ex);65                }66            }67            catch68            {69                await Process.KillAsync().ConfigureAwait(false);70                throw;71            }72        }73        /// <summary>74        /// Attaches Puppeteer to an existing Chromium instance. The browser will be closed when the Browser is disposed.75        /// </summary>76        /// <param name="options">Options for connecting.</param>77        /// <returns>A connected browser.</returns>78        public async Task<Browser> ConnectAsync(ConnectOptions options)79        {80            EnsureSingleLaunchOrConnect();81            try82            {83                var connection = await Connection.Create(options.BrowserWSEndpoint, options, _loggerFactory).ConfigureAwait(false);84                var response = await connection.SendAsync<GetBrowserContextsResponse>("Target.getBrowserContexts");85                return await Browser86                    .CreateAsync(connection, response.BrowserContextIds, options.IgnoreHTTPSErrors, options.DefaultViewport, null)87                    .ConfigureAwait(false);88            }89            catch (Exception ex)90            {91                throw new ChromiumProcessException("Failed to create connection", ex);92            }93        }94        /// <summary>95        /// Gets the executable path.96        /// </summary>97        /// <returns>The executable path.</returns>98        public static string GetExecutablePath()99            => ResolveExecutablePath();100        #endregion101        #region Private methods102        private void EnsureSingleLaunchOrConnect()103        {104            if (_chromiumLaunched)105            {106                throw new InvalidOperationException("Unable to create or connect to another chromium process");107            }108            _chromiumLaunched = true;109        }110        private static string GetOrFetchChromeExecutable(LaunchOptions options)111        {112            var chromeExecutable = options.ExecutablePath;113            if (string.IsNullOrEmpty(chromeExecutable))114            {115                chromeExecutable = ResolveExecutablePath();116            }...

EnsureSingleLaunchOrConnect

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using System.IO;5using System.Diagnostics;6{7    {8        static async Task Main(string[] args)9        {10            {11                ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",12                Args = new[] { "--no-sandbox" },13            };14            var browserFetcher = new BrowserFetcher();15            var revisionInfo = await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);16            var browser = await Puppeteer.LaunchAsync(options);17            var page = await browser.NewPageAsync();18            await page.PdfAsync("google.pdf");19            await browser.CloseAsync();20        }21    }22}23using System;24using System.Threading.Tasks;25using PuppeteerSharp;26using System.IO;27using System.Diagnostics;28{29    {30        static async Task Main(string[] args)31        {32            {33                ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",34                Args = new[] { "--no-sandbox" },35            };36            var browserFetcher = new BrowserFetcher();37            var revisionInfo = await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);38            var browser = await Puppeteer.LaunchAsync(options);39            var page = await browser.NewPageAsync();40            await page.PdfAsync("google.pdf");41            await browser.CloseAsync();42            Launcher.KillChrome();43        }44    }45}46using System;47using System.Threading.Tasks;48using PuppeteerSharp;49using System.IO;50using System.Diagnostics;51{52    {53        static async Task Main(string[] args)54        {55            {

EnsureSingleLaunchOrConnect

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            {9                ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",10                Args = new string[] { "--start-maximized" }11            };12            using (var browser = await Puppeteer.LaunchAsync(options))13            {14                var page = await browser.NewPageAsync();15                Console.WriteLine("Press any key to close the browser instance");16                Console.ReadKey();17            }18        }19    }20}21using PuppeteerSharp;22using System;23using System.Threading.Tasks;24{25    {26        static async Task Main(string[] args)27        {28            var fetcher = new BrowserFetcher();29            var revisionInfo = await fetcher.DownloadAsync(BrowserFetcher.DefaultRevision);30            Console.WriteLine(revisionInfo.Revision);31            Console.WriteLine(revisionInfo.Local);32            Console.WriteLine(revisionInfo.Url);33            Console.WriteLine("Press any key to close the browser instance");34            Console.ReadKey();35        }36    }37}38using PuppeteerSharp;39using System;40using System.Threading.Tasks;41{42    {43        static async Task Main(string[] args)44        {45            var fetcher = new BrowserFetcher();46            var revisionInfo = await fetcher.DownloadAsync();47            Console.WriteLine(revisionInfo.Revision);48            Console.WriteLine(revisionInfo.Local);49            Console.WriteLine(revisionInfo.Url);50            Console.WriteLine("Press any key to close the browser instance");51            Console.ReadKey();52        }53    }54}55using PuppeteerSharp;56using System;

EnsureSingleLaunchOrConnect

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;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\"]", "puppeteer-sharp");14            await page.PressAsync("input[name=\"q\"]", "Enter");15            await page.WaitForNavigationAsync();16            await page.ScreenshotAsync("screenshot.png");17            await browser.CloseAsync();18        }19    }20}

EnsureSingleLaunchOrConnect

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static void Main(string[] args)7        {8            EnsureSingleLaunchOrConnect().Wait();9        }10        static async Task EnsureSingleLaunchOrConnect()11        {12            var options = new LaunchOptions { Headless = false };13            var browser = await Puppeteer.LaunchAsync(options);14            var browser2 = await Puppeteer.LaunchAsync(options);15            var browser3 = await Puppeteer.ConnectAsync(new ConnectOptions16            {17            });18            var browser4 = await Puppeteer.ConnectAsync(new ConnectOptions19            {20            });21        }22    }23}24Recommended Posts: PuppeteerSharp | PuppeteerSharp.Launcher.LaunchAsync() method25PuppeteerSharp | PuppeteerSharp.Launcher.ConnectAsync() method26PuppeteerSharp | PuppeteerSharp.Launcher.LaunchAsync() method in C# with Example27PuppeteerSharp | PuppeteerSharp.Launcher.ConnectAsync() method in C# with Example28PuppeteerSharp | PuppeteerSharp.Launcher.LaunchAsync() method in C# with Example29PuppeteerSharp | PuppeteerSharp.Launcher.ConnectAsync() method in C# with Example30PuppeteerSharp | PuppeteerSharp.Launcher.LaunchAsync() method in C# with Example31PuppeteerSharp | PuppeteerSharp.Launcher.ConnectAsync() method in C# with Example

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