How to use Dispose method of PuppeteerSharp.Helpers.AsyncMessageQueue class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Helpers.AsyncMessageQueue.Dispose

Connection.cs

Source: Connection.cs Github

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...146 $"Protocol error({response.Method}): Target closed.",147 closeReason));148 }149 _callbacks.Clear();150 MessageQueue.Dispose();151 }152 internal static Connection FromSession(CDPSession session) => session.Connection;153 internal CDPSession GetSession(string sessionId) => _sessions.GetValueOrDefault(sessionId);154 internal Task<CDPSession> GetSessionAsync(string sessionId) => _asyncSessions.GetItemAsync(sessionId);155 private async void Transport_MessageReceived(object sender, MessageReceivedEventArgs e)156 => await _callbackQueue.Enqueue(() => ProcessMessage(e)).ConfigureAwait(false);157 private async Task ProcessMessage(MessageReceivedEventArgs e)158 {159 try160 {161 var response = e.Message;162 ConnectionResponse obj = null;163 if (response.Length > 0 && Delay > 0)164 {165 await Task.Delay(Delay).ConfigureAwait(false);166 }167 try168 {169 obj = JsonConvert.DeserializeObject<ConnectionResponse>(response, JsonHelper.DefaultJsonSerializerSettings);170 }171 catch (JsonException exc)172 {173 _logger.LogError(exc, "Failed to deserialize response", response);174 return;175 }176 _logger.LogTrace("◀ Receive {Message}", response);177 ProcessIncomingMessage(obj);178 }179 catch (Exception ex)180 {181 var message = $"Connection failed to process {e.Message}. {ex.Message}. {ex.StackTrace}";182 _logger.LogError(ex, message);183 Close(message);184 }185 }186 private void ProcessIncomingMessage(ConnectionResponse obj)187 {188 var method = obj.Method;189 var param = obj.Params?.ToObject<ConnectionResponseParams>();190 if (method == "Target.attachedToTarget")191 {192 var sessionId = param.SessionId;193 var session = new CDPSession(this, param.TargetInfo.Type, sessionId);194 _asyncSessions.AddItem(sessionId, session);195 SessionAttached?.Invoke(this, new SessionAttachedEventArgs { Session = session });196 if (obj.SessionId != null && _sessions.TryGetValue(obj.SessionId, out var parentSession))197 {198 parentSession.OnSessionAttached(session);199 }200 }201 else if (method == "Target.detachedFromTarget")202 {203 var sessionId = param.SessionId;204 if (_sessions.TryRemove(sessionId, out var session) && !session.IsClosed)205 {206 session.Close("Target.detachedFromTarget");207 }208 }209 if (!string.IsNullOrEmpty(obj.SessionId))210 {211 var session = GetSession(obj.SessionId);212 session?.OnMessage(obj);213 }214 else if (obj.Id.HasValue)215 {216 /​/​ If we get the object we are waiting for we return if217 /​/​ if not we add this to the list, sooner or later some one will come for it218 if (_callbacks.TryRemove(obj.Id.Value, out var callback))219 {220 MessageQueue.Enqueue(callback, obj);221 }222 }223 else224 {225 MessageReceived?.Invoke(this, new MessageEventArgs226 {227 MessageID = method,228 MessageData = obj.Params229 });230 }231 }232 private void Transport_Closed(object sender, TransportClosedEventArgs e) => Close(e.CloseReason);233 internal static async Task<Connection> Create(string url, IConnectionOptions connectionOptions, ILoggerFactory loggerFactory = null, CancellationToken cancellationToken = default)234 {235#pragma warning disable 618236 var transport = connectionOptions.Transport;237#pragma warning restore 618238 if (transport == null)239 {240 var transportFactory = connectionOptions.TransportFactory ?? WebSocketTransport.DefaultTransportFactory;241 transport = await transportFactory(new Uri(url), connectionOptions, cancellationToken).ConfigureAwait(false);242 }243 return new Connection(url, connectionOptions.SlowMo, connectionOptions.EnqueueAsyncMessages, transport, loggerFactory);244 }245 /​/​/​ <inheritdoc /​>246 public void Dispose()247 {248 Dispose(true);249 GC.SuppressFinalize(this);250 }251 /​/​/​ <summary>252 /​/​/​ Releases all resource used by the <see cref="Connection"/​> object.253 /​/​/​ It will raise the <see cref="Disconnected"/​> event and dispose <see cref="Transport"/​>.254 /​/​/​ </​summary>255 /​/​/​ <remarks>Call <see cref="Dispose()"/​> when you are finished using the <see cref="Connection"/​>. The256 /​/​/​ <see cref="Dispose()"/​> method leaves the <see cref="Connection"/​> in an unusable state.257 /​/​/​ After calling <see cref="Dispose()"/​>, you must release all references to the258 /​/​/​ <see cref="Connection"/​> so the garbage collector can reclaim the memory that the259 /​/​/​ <see cref="Connection"/​> was occupying.</​remarks>260 /​/​/​ <param name="disposing">Indicates whether disposal was initiated by <see cref="Dispose()"/​> operation.</​param>261 protected virtual void Dispose(bool disposing)262 {263 Close("Connection disposed");264 Transport.MessageReceived -= Transport_MessageReceived;265 Transport.Closed -= Transport_Closed;266 Transport.Dispose();267 _callbackQueue.Dispose();268 }269 }270}...

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AsyncMessageQueue.cs

Source: AsyncMessageQueue.cs Github

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...26 public void Enqueue(MessageTask callback, ConnectionResponse obj)27 {28 if (_disposed)29 {30 throw new ObjectDisposedException(GetType().FullName);31 }32 if (!_enqueueAsyncMessages)33 {34 HandleAsyncMessage(callback, obj);35 return;36 }37 /​/​ Keep a ref to this task until it completes. If it can't finish by the time we dispose this queue,38 /​/​ then we'll find it and cancel it.39 lock (_pendingTasks)40 {41 _pendingTasks.Add(callback);42 }43 var task = Task.Run(() => HandleAsyncMessage(callback, obj));44 /​/​ Unhandled error handler45 task.ContinueWith(46 t =>47 {48 _logger.LogError(t.Exception, "Failed to complete async handling of SendAsync for {callback}", callback.Method);49 callback.TaskWrapper.TrySetException(t.Exception!); /​/​ t.Exception is available since this runs only on faulted50 },51 CancellationToken.None,52 TaskContinuationOptions.OnlyOnFaulted,53 TaskScheduler.Default);54 /​/​ Always remove from the queue when done, regardless of outcome.55 task.ContinueWith(56 _ =>57 {58 lock (_pendingTasks)59 {60 _pendingTasks.Remove(callback);61 }62 },63 TaskScheduler.Default);64 }65 public void Dispose()66 {67 if (_disposed)68 {69 return;70 }71 /​/​ Ensure all tasks are finished since we're disposing now. Any pending tasks will be canceled.72 MessageTask[] pendingTasks;73 lock (_pendingTasks)74 {75 pendingTasks = _pendingTasks.ToArray();76 _pendingTasks.Clear();77 }78 foreach (var pendingTask in pendingTasks)79 {...

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Dispose

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Helpers;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 var queue = new AsyncMessageQueue();14 queue.OnMessage += (message) =>15 {16 Console.WriteLine(message);17 };

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Dispose

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using PuppeteerSharp.Helpers;7{8 {9 public AsyncMessageQueue()10 {11 _queue = new Queue<TaskCompletionSource<object>>();12 }13 public void Dispose()14 {15 lock (_queue)16 {17 while (_queue.Count > 0)18 {19 _queue.Dequeue().SetException(new ObjectDisposedException("AsyncMessageQueue"));20 }21 }22 }23 public Task Enqueue()24 {25 var tcs = new TaskCompletionSource<object>();26 lock (_queue)27 {28 _queue.Enqueue(tcs);29 }30 return tcs.Task;31 }32 public void Dequeue()33 {34 TaskCompletionSource<object> tcs = null;35 lock (_queue)36 {37 if (_queue.Count > 0)38 {39 tcs = _queue.Dequeue();40 }41 }42 if (tcs != null)43 {44 tcs.SetResult(null);45 }46 }47 public void Clear()48 {49 lock (_queue)50 {51 _queue.Clear();52 }53 }54 private readonly Queue<TaskCompletionSource<object>> _queue;55 }56}57using System;58using System.Collections.Generic;59using System.Linq;60using System.Text;61using System.Threading.Tasks;62using PuppeteerSharp.Helpers;63{64 {65 public AsyncMessageQueue()66 {67 _queue = new Queue<TaskCompletionSource<object>>();68 }69 public void Dispose()70 {71 lock (_queue)72 {73 while (_queue.Count > 0)74 {75 _queue.Dequeue().SetException(new ObjectDisposedException("AsyncMessageQueue"));76 }77 }78 }79 public Task Enqueue()80 {81 var tcs = new TaskCompletionSource<object>();82 lock (_queue)83 {84 _queue.Enqueue(tcs);85 }86 return tcs.Task;87 }88 public void Dequeue()89 {90 TaskCompletionSource<object> tcs = null;91 lock (_queue)92 {93 if (_queue.Count > 0)94 {95 tcs = _queue.Dequeue();96 }97 }

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Helpers;4{5 {6 static async Task Main(string[] args)7 {8 var queue = new AsyncMessageQueue();9 queue.Enqueue(async () => await Task.Delay(1000));10 queue.Enqueue(async () => await Task.Delay(1000));11 queue.Enqueue(async () => await Task.Delay(1000));12 queue.Dispose();13 Console.WriteLine("Hello World!");14 }15 }16}

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Dispose

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using PuppeteerSharp.Helpers;7using PuppeteerSharp;8{9 {10 private readonly List<Func<Task>> _queue = new List<Func<Task>>();11 private readonly object _syncRoot = new object();12 private bool _isRunning;13 public void Enqueue(Func<Task> task)14 {15 lock (_syncRoot)16 {17 _queue.Add(task);18 if (!_isRunning)19 {20 _isRunning = true;21 Task.Run(() => RunQueue());22 }23 }24 }25 private async Task RunQueue()26 {27 while (true)28 {29 Func<Task> task = null;30 lock (_syncRoot)31 {32 if (_queue.Any())33 {34 task = _queue.First();35 _queue.RemoveAt(0);36 }37 {38 _isRunning = false;39 break;40 }41 }42 await task();43 }44 }45 public void Dispose()46 {47 lock (_syncRoot)48 {49 _queue.Clear();50 }51 }52 }53}54using PuppeteerSharp.Helpers;55using PuppeteerSharp;56using System;57using System.Collections.Generic;58using System.Linq;59using System.Text;60using System.Threading.Tasks;61{62 {63 static void Main(string[] args)64 {65 AsyncMessageQueue asyncMessageQueue = new AsyncMessageQueue();66 asyncMessageQueue.Enqueue(Check);67 asyncMessageQueue.Dispose();68 Console.ReadLine();69 }70 static async Task Check()71 {72 Console.WriteLine("Hello");73 }74 }75}76Task.Run() vs Task.Factory.StartNew() vs Thread77Task.Run() vs Task.Factory.StartNew() vs Thread78Task.Run() vs Task.Factory.StartNew() vs Thread

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Helpers;4using PuppeteerSharp.Messaging;5{6 {7 public 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 LaunchOptions { Headless = false, ExecutablePath = revisionInfo.ExecutablePath });12 var page = await browser.NewPageAsync();13 await page.WaitForSelectorAsync("input[name='q']");14 var messageQueue = new AsyncMessageQueue<ConsoleAPICalledResponse>();15 page.Console += (sender, e) => messageQueue.Enqueue(e.Message);16 await page.EvaluateExpressionAsync("console.log('hello')");17 var message = await messageQueue.DequeueAsync();18 Console.WriteLine(message.Args[0].Value);19 }20 }21}22using System;23using System.Threading.Tasks;24using PuppeteerSharp.Helpers;25using PuppeteerSharp.Messaging;26{27 {28 public static async Task Main(string[] args)29 {30 var browserFetcher = new BrowserFetcher();31 var revisionInfo = await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);32 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false, ExecutablePath = revisionInfo.ExecutablePath });33 var page = await browser.NewPageAsync();34 await page.WaitForSelectorAsync("input[name='q']");35 var messageQueue = new AsyncQueue<ConsoleAPICalledResponse>();36 page.Console += (sender, e) => messageQueue.Enqueue(e.Message);37 await page.EvaluateExpressionAsync("console.log('hello')");38 var message = await messageQueue.DequeueAsync();39 Console.WriteLine(message.Args[0].Value);40 }41 }42}43using System;44using System.Threading.Tasks;45using PuppeteerSharp.Helpers;46using PuppeteerSharp.Messaging;47{48 {49 public static async Task Main(string[] args)50 {

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using PuppeteerSharp.Helpers;7{8 {9 private readonly List<string> _messages = new List<string>();10 private readonly TaskCompletionSource<bool> _completionSource = new TaskCompletionSource<bool>();11 public void Add(string message)12 {13 _messages.Add(message);14 _completionSource.SetResult(true);15 }16 public async Task<string> GetNextMessageAsync()17 {18 if (_messages.Count > 0)19 {20 var message = _messages[0];21 _messages.RemoveAt(0);22 return message;23 }24 await _completionSource.Task;25 _completionSource.SetResult(true);26 return await GetNextMessageAsync();27 }28 public void Dispose()29 {30 _completionSource.SetCanceled();31 }32 }33}34using System;35using System.Collections.Generic;36using System.Linq;37using System.Text;38using System.Threading.Tasks;39using PuppeteerSharp.Helpers;40{41 {42 static async Task Main(string[] args)43 {44 var queue = new AsyncMessageQueue();45 var task1 = Task.Run(async () =>46 {47 for (var i = 0; i < 10; i++)48 {49 await Task.Delay(1000);50 queue.Add($"Message {i}");51 }52 });53 var task2 = Task.Run(async () =>54 {55 for (var i = 0; i < 10; i++)56 {57 var message = await queue.GetNextMessageAsync();58 Console.WriteLine(message);59 }60 });61 await Task.WhenAll(task1, task2);62 }63 }64}65using System;66using System.Collections.Generic;67using System.Linq;68using System.Text;69using System.Threading.Tasks;70using PuppeteerSharp.Helpers;71{

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Dispose

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp.Helpers;4{5 {6 public static async Task Main(string[] args)7 {8 var browser = await Puppeteer.LaunchAsync();9 var page = await browser.NewPageAsync();10 var title = await page.EvaluateExpressionAsync<string>("document.title");11 Console.WriteLine(title);12 await page.ScreenshotAsync("example.png");13 await browser.CloseAsync();14 await page.DisposeAsync();15 }16 }17}18using System;19using System.Threading.Tasks;20using PuppeteerSharp.Helpers;21{22 {23 public static async Task Main(string[] args)24 {25 var browser = await Puppeteer.LaunchAsync();26 var page = await browser.NewPageAsync();27 var title = await page.EvaluateExpressionAsync<string>("document.title");28 Console.WriteLine(title);29 await page.ScreenshotAsync("example.png");30 await browser.CloseAsync();31 page.Dispose();32 }33 }34}35using System;36using System.Threading.Tasks;37using PuppeteerSharp.Helpers;38{39 {40 public static async Task Main(string[] args)41 {42 var browser = await Puppeteer.LaunchAsync();43 var page = await browser.NewPageAsync();44 var title = await page.EvaluateExpressionAsync<string>("document.title");45 Console.WriteLine(title);46 await page.ScreenshotAsync("example.png");47 await browser.CloseAsync();48 page.DisposeAsync().GetAwaiter().GetResult();49 }50 }51}52using System;53using System.Threading.Tasks;54using PuppeteerSharp.Helpers;55{56 {57 public static async Task Main(string[] args)

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1using PuppeteerSharp.Helpers;2using System;3{4 {5 public AsyncMessageQueue()6 {7 _queue = new Queue();8 _queueLock = new object();9 }10 public void Enqueue(Action action)11 {12 lock (_queueLock)13 {14 _queue.Enqueue(action);15 }16 }17 public async Task<bool> DequeueAsync()18 {19 Action action;20 lock (_queueLock)21 {22 if (_queue.Count == 0)23 {24 return false;25 }26 action = _queue.Dequeue();27 }28 await action.Invoke();29 return true;30 }31 public void Dispose()32 {33 Enqueue(() => { });34 }35 private readonly Queue _queue;36 private readonly object _queueLock;37 }38}39using PuppeteerSharp.Helpers;40using System;41using System.Threading.Tasks;42{43 {44 public AsyncMessageQueue()45 {46 _queue = new Queue();47 _queueLock = new object();48 }49 public void Enqueue(Action action)50 {51 lock (_queueLock)52 {53 _queue.Enqueue(action);54 }55 }56 public async Task<bool> DequeueAsync()57 {58 Action action;59 lock (_queueLock)60 {61 if (_queue.Count == 0)62 {63 return false;64 }65 action = _queue.Dequeue();66 }67 await action.Invoke();68 return true;69 }70 public void Dispose()71 {72 Enqueue(() => { });73 }74 private readonly Queue _queue;75 private readonly object _queueLock;76 }77}78using PuppeteerSharp.Helpers;79using System;80using System.Threading.Tasks;81{82 {83 public AsyncMessageQueue()84 {85 _queue = new Queue();86 _queueLock = new object();87 }88 public void Enqueue(Action action)89 {90 lock (_queueLock)91 {92 _queue.Enqueue(action);93 }94 }95 public async Task<bool> DequeueAsync()96 {97 Action action;

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1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using PuppeteerSharp.Helpers;7{8 {9 private readonly Queue<TaskCompletionSource<object>> _queue = new Queue<TaskCompletionSource<object>>();10 private readonly object _lock = new object();11 public Task<object> Enqueue()12 {13 lock (_lock)14 {15 var tcs = new TaskCompletionSource<object>();16 _queue.Enqueue(tcs);17 return tcs.Task;18 }19 }20 public void Dequeue(object value)21 {22 lock (_lock)23 {24 var tcs = _queue.Dequeue();25 tcs.SetResult(value);26 }27 }28 public void Dispose()29 {30 lock (_lock)31 {32 while (_queue.Count > 0)33 {34 Dequeue(null);35 }36 }37 }38 }39}40using System;41using System.Collections.Generic;42using System.Linq;43using System.Text;44using System.Threading.Tasks;45using PuppeteerSharp.Helpers;46{47 {48 private readonly Queue<TaskCompletionSource<object>> _queue = new Queue<TaskCompletionSource<object>>();49 private readonly object _lock = new object();50 public Task<object> Enqueue()51 {52 lock (_lock)53 {54 var tcs = new TaskCompletionSource<object>();55 _queue.Enqueue(tcs);56 return tcs.Task;57 }58 }59 public void Dequeue(object value)60 {61 lock (_lock)62 {63 var tcs = _queue.Dequeue();64 tcs.SetResult(value);65 }66 }67 public void Dispose()68 {69 lock (_lock)70 {71 while (_queue.Count > 0)72 {73 Dequeue(null);74 }75 }76 }77 }78}79using System;80using System.Collections.Generic;81using System.Linq;82using System.Text;83using System.Threading.Tasks;84using PuppeteerSharp.Helpers;

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StackOverFlow community discussions

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Discussion

Set input value with Puppeteer-Sharp

PuppeteerSharp evaluate expression to complex type?

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Cancel Downloading in PuppeteerSharp

Get Result of document.querySelectorAll in PuppeteerSharp

using below,

using var page = browser.NewPageAsync().Result;

page.TypeAsync("input[name='elementname']", valuetobeset).Wait();
https://stackoverflow.com/questions/67332554/set-input-value-with-puppeteer-sharp

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