How to use TargetClosedException class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.TargetClosedException

Connection.cs

Source: Connection.cs Github

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...85 internal async Task<JObject> SendAsync(string method, object args = null, bool waitForCallback = true)86 {87 if (IsClosed)88 {89 throw new TargetClosedException($"Protocol error({method}): Target closed.", CloseReason);90 }91 var id = GetMessageID();92 MessageTask callback = null;93 if (waitForCallback)94 {95 callback = new MessageTask96 {97 TaskWrapper = new TaskCompletionSource<JObject>(),98 Method = method99 };100 _callbacks[id] = callback;101 }102 await RawSendASync(id, method, args).ConfigureAwait(false);103 return waitForCallback ? await callback.TaskWrapper.Task.ConfigureAwait(false) : null;104 }105 internal async Task<T> SendAsync<T>(string method, object args = null)106 {107 var response = await SendAsync(method, args).ConfigureAwait(false);108 return response.ToObject<T>(true);109 }110 internal async Task<CDPSession> CreateSessionAsync(TargetInfo targetInfo)111 {112 var sessionId = (await SendAsync<TargetAttachToTargetResponse>("Target.attachToTarget", new TargetAttachToTargetRequest113 {114 TargetId = targetInfo.TargetId,115 Flatten = true116 }).ConfigureAwait(false)).SessionId;117 return await GetSessionAsync(sessionId).ConfigureAwait(false);118 }119 internal bool HasPendingCallbacks() => _callbacks.Count != 0;120 #endregion121 internal void Close(string closeReason)122 {123 if (IsClosed)124 {125 return;126 }127 IsClosed = true;128 CloseReason = closeReason;129 Transport.StopReading();130 Disconnected?.Invoke(this, new EventArgs());131 foreach (var session in _sessions.Values.ToArray())132 {133 session.Close(closeReason);134 }135 _sessions.Clear();136 foreach (var response in _callbacks.Values.ToArray())137 {138 response.TaskWrapper.TrySetException(new TargetClosedException(139 $"Protocol error({response.Method}): Target closed.",140 closeReason));141 }142 _callbacks.Clear();143 }144 internal static Connection FromSession(CDPSession session) => session.Connection;145 internal CDPSession GetSession(string sessionId) => _sessions.GetValueOrDefault(sessionId);146 internal Task<CDPSession> GetSessionAsync(string sessionId) => _asyncSessions.GetItemAsync(sessionId);147 #region Private Methods148 private async void Transport_MessageReceived(object sender, MessageReceivedEventArgs e)149 => await _callbackQueue.Enqueue(() => ProcessMessage(e)).ConfigureAwait(false);150 private async Task ProcessMessage(MessageReceivedEventArgs e)151 {152 try...

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CDPSession.cs

Source: CDPSession.cs Github

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...195 CloseReason = closeReason;196 IsClosed = true;197 foreach (var callback in _callbacks.Values.ToArray())198 {199 callback.TaskWrapper.TrySetException(new TargetClosedException(200 $"Protocol error({callback.Method}): Target closed.",201 closeReason));202 }203 _callbacks.Clear();204 Disconnected?.Invoke(this, EventArgs.Empty);205 Connection = null;206 }207 #endregion208 }209}...

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BrowserActor.cs

Source: BrowserActor.cs Github

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...105 }106 else if (exception is SelectorException)107 {108 }109 else if (exception is TargetClosedException) /​/​ Page was closed110 {111 return Directive.Restart;112 }113 }114 else if (exception is NullReferenceException)115 {116 return Directive.Escalate;117 }118 return Directive.Resume;119 });120 }121 #region Lifecycle Hooks122 protected override void PreStart()123 {...

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MirrorTaskExecutioner.cs

Source: MirrorTaskExecutioner.cs Github

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...95 }96 }97 catch (PuppeteerException e)98 {99 if (e is TargetClosedException || e is NavigationException100 || e is ChromiumProcessException)101 {102 /​/​stop action103 Log.Information("You have stopped the uploading process.");104 }105 else106 {107 throw;108 }109 }110 catch (Exception e)111 {112 Log.Error($"Uploading process has stopped.");113 Log.Error($"{e}");...

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PuppeteerLoader.cs

Source: PuppeteerLoader.cs Github

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...32 logger.LogInformation($"Create {nameof(Browser)}");33 }34 public async Task<IDocument> LoadHtml(string requestUri, Site site, CancellationToken token)35 {36 return await ReconnectOnExceptionAsync<IDocument, TargetClosedException>(37 2,38 new TimeSpan(0, 0, 1),39 async () => await LoadHtmlContent(requestUri, site, token));40 }41 private async Task<IDocument> LoadHtmlContent(string requestUri, Site site, CancellationToken token)42 {43 requestUri.StringNullOrEmptyValidate(nameof(requestUri));44 site.NullValidate(nameof(site));45 var parserSettings = configuration.GetSection(site.Name).Get<ExtractorSettings>();46 using var page = await browser.NewPageAsync();47 await page.GoToAsync(requestUri);48 var waitingSelector = parserSettings.WaitingSelector ?? parserSettings.Name;49 await page.WaitForSelectorAsync(waitingSelector);50 logger.LogInformation($"Successfully sent request {requestUri}");...

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BrowserCloseTests.cs

Source: BrowserCloseTests.cs Github

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...18 var newPage = await remote.NewPageAsync();19 var requestTask = newPage.WaitForRequestAsync(TestConstants.EmptyPage);20 var responseTask = newPage.WaitForResponseAsync(TestConstants.EmptyPage);21 await browser.CloseAsync();22 var exception = await Assert.ThrowsAsync<TargetClosedException>(() => requestTask);23 Assert.Contains("Target closed", exception.Message);24 Assert.DoesNotContain("Timeout", exception.Message);25 exception = await Assert.ThrowsAsync<TargetClosedException>(() => responseTask);26 Assert.Contains("Target closed", exception.Message);27 Assert.DoesNotContain("Timeout", exception.Message);28 }29 }30 }31}...

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CloseTests.cs

Source: CloseTests.cs Github

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...13 var newPage = await Browser.NewPageAsync();14 var neverResolves = newPage.EvaluateFunctionAsync("() => new Promise(r => {})");15 /​/​ Put into a var to avoid warning16 var t = newPage.CloseAsync();17 var exception = await Assert.ThrowsAsync<TargetClosedException>(async () => await neverResolves);18 Assert.Contains("Protocol error", exception.Message);19 }20 }21}...

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TargetClosedException.cs

Source: TargetClosedException.cs Github

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2{3 /​/​/​ <summary>4 /​/​/​ Exception thrown by the <see cref="Connection"/​> when it detects that the target was closed.5 /​/​/​ </​summary>6 public class TargetClosedException : PuppeteerException7 {8 /​/​/​ <summary>9 /​/​/​ Initializes a new instance of the <see cref="TargetClosedException"/​> class.10 /​/​/​ </​summary>11 /​/​/​ <param name="message">Message.</​param>12 public TargetClosedException(string message) : base(message)13 {14 }15 }...

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TargetClosedException

Using AI Code Generation

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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 Args = new string[] { "--no-sandbox" }11 });12 var page = await browser.NewPageAsync();13 {14 }15 catch (TargetClosedException e)16 {17 Console.WriteLine("Exception: " + e.Message);18 }19 await browser.CloseAsync();20 }21 }22}

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TargetClosedException

Using AI Code Generation

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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.CloseAsync();13 await browser.CloseAsync();14 }15 }16}17var browser = await Puppeteer.LaunchAsync(new LaunchOptions18 {19 });20 var page = await browser.NewPageAsync();21 await page.CloseAsync();22 await browser.CloseAsync();23var browser = await Puppeteer.LaunchAsync(new LaunchOptions24 {25 });26 var page = await browser.NewPageAsync();27 await page.CloseAsync();28 await browser.CloseAsync();29var browser = await Puppeteer.LaunchAsync(new LaunchOptions30 {31 });32 var page = await browser.NewPageAsync();33 await page.CloseAsync();34 await browser.CloseAsync();35var browser = await Puppeteer.LaunchAsync(new LaunchOptions36 {37 });

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TargetClosedException

Using AI Code Generation

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 static void Main(string[] args)7 {8 MainAsync().Wait();9 }10 static async Task MainAsync()11 {12 var browser = await Puppeteer.LaunchAsync(new LaunchOptions13 {14 });15 var page = await browser.NewPageAsync();16 await page.WaitFor(10000);17 var page2 = await browser.NewPageAsync();18 await page2.WaitFor(10000);19 await page.CloseAsync();20 await page2.CloseAsync();21 }22 }23}24at PuppeteerSharp.Target.CloseTargetAsync(Boolean runBeforeUnload)25at PuppeteerSharp.Page.CloseAsync()26at PuppeteerSharpTest.Program.MainAsync() in C:\Users\user\source\repos\PuppeteerSharpTest\PuppeteerSharpTest\Program.cs:line 3027at PuppeteerSharpTest.Program.Main(String[] args) in C:\Users\user\source\repos\PuppeteerSharpTest\PuppeteerSharpTest\Program.cs:line 14

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TargetClosedException

Using AI Code Generation

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1var browser = await Puppeteer.LaunchAsync(new LaunchOptions2{3 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",4});5var page = await browser.NewPageAsync();6await page.ScreenshotAsync("google.png");7await browser.CloseAsync();8var browser = await Puppeteer.LaunchAsync(new LaunchOptions9{10 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",11});12var page = await browser.NewPageAsync();13await page.ScreenshotAsync("google.png");14await browser.CloseAsync();15var browser = await Puppeteer.LaunchAsync(new LaunchOptions16{17 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",18});19var page = await browser.NewPageAsync();20await page.ScreenshotAsync("google.png");21await browser.CloseAsync();22var browser = await Puppeteer.LaunchAsync(new LaunchOptions23{24 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",25});26var page = await browser.NewPageAsync();27await page.ScreenshotAsync("google.png");28await browser.CloseAsync();29var browser = await Puppeteer.LaunchAsync(new LaunchOptions30{31 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",32});33var page = await browser.NewPageAsync();

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TargetClosedException

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 public static async Task Main(string[] args)7 {8 {9 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);10 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });11 var page = await browser.NewPageAsync();12 await page.CloseAsync();13 await browser.CloseAsync();14 }15 catch (TargetClosedException ex)16 {17 Console.WriteLine(ex.Message);18 }19 }20 }21}

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TargetClosedException

Using AI Code Generation

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1var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });2var page = await browser.NewPageAsync();3await page.ClickAsync("input[name='q']");4await page.Keyboard.TypeAsync("PuppeteerSharp");5await page.Keyboard.PressAsync("Enter");6await page.WaitForSelectorAsync("h3");7var elements = await page.QuerySelectorAllAsync("h3");8foreach (var element in elements)9{10 var title = await page.EvaluateFunctionAsync<string>("element => element.textContent", element);11 Console.WriteLine(title);12}13await page.CloseAsync();

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TargetClosedException

Using AI Code Generation

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1using System;2using PuppeteerSharp;3{4 static void Main(string[] args)5 {6 var browser = Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }).Result;7 var page = browser.NewPageAsync().Result;8 Console.ReadLine();9 }10}

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StackOverFlow community discussions

Questions
Discussion

Is there a remove page method corresponding to NewPageAsync() in PuppeteerSharp?

how to use puppeteer-sharp touchStart and touchEnd and touch move

How to set download behaviour in PuppeteerSharp?

PuppeteerSharp throws ChromiumProcessException &quot;Failed to create connection&quot; when launching a browser

How to get text out of ElementHandle?

PuppeteerSharp - querySelectorAll + click

How do you set a cookie in Puppetteer-Sharp?

PuppeteerSharp best practices

PuppeteerSharp evaluate expression to complex type?

Puppeteer Sharp strange behaviour

You can close the page using CloseAsync:

var page = browser.NewPageAsync();
////
await page.CloseAsync();

An using block will also close the page:

using (var page = await new browser.PageAsync())
{
///
}

Puppeteer-Sharp v2.0.3+ also supports await using blocks

await using (var page = await new browser.PageAsync())
{
 ///
}
https://stackoverflow.com/questions/61517099/is-there-a-remove-page-method-corresponding-to-newpageasync-in-puppeteersharp

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Most used methods in TargetClosedException

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