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How to use TargetClosedException class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.TargetClosedException

Connection.cs

Source:Connection.cs

...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...

CDPSession.cs

Source:CDPSession.cs

...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}...

BrowserActor.cs

Source:BrowserActor.cs

...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        {...

MirrorTaskExecutioner.cs

Source:MirrorTaskExecutioner.cs

...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}");...

PuppeteerLoader.cs

Source:PuppeteerLoader.cs

...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}");...

BrowserCloseTests.cs

Source:BrowserCloseTests.cs

...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}...

CloseTests.cs

Source:CloseTests.cs

...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}...

TargetClosedException.cs

Source:TargetClosedException.cs

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    }...

TargetClosedException

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                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}

TargetClosedException

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.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            });

TargetClosedException

Using AI Code Generation

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

TargetClosedException

Using AI Code Generation

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();

TargetClosedException

Using AI Code Generation

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}

TargetClosedException

Using AI Code Generation

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();

TargetClosedException

Using AI Code Generation

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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