How to use LauncherBase class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.LauncherBase

LauncherBase.cs

Source:LauncherBase.cs Github

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...12 /// <summary>13 /// Represents a Base process and any associated temporary user data directory that have created14 /// by Puppeteer and therefore must be cleaned up when no longer needed.15 /// </summary>16 public class LauncherBase : IDisposable17 {18 #region Instance fields19 private readonly LaunchOptions _options;20 private readonly TaskCompletionSource<string> _startCompletionSource = new TaskCompletionSource<string>(TaskCreationOptions.RunContinuationsAsynchronously);21 private readonly TaskCompletionSource<bool> _exitCompletionSource = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);22 private State _currentState = State.Initial;23 #endregion24 #region Constructor25 /// <summary>26 /// Creates a new <see cref="LauncherBase"/> instance.27 /// </summary>28 /// <param name="executable">Full path of executable.</param>29 /// <param name="options">Options for launching Base.</param>30 /// <param name="loggerFactory">Logger factory</param>31 public LauncherBase(string executable, LaunchOptions options)32 {33 _options = options;34 Process = new Process35 {36 EnableRaisingEvents = true37 };38 Process.StartInfo.UseShellExecute = false;39 Process.StartInfo.FileName = executable;40 Process.StartInfo.RedirectStandardError = true;41 SetEnvVariables(Process.StartInfo.Environment, options.Env, Environment.GetEnvironmentVariables());42 if (options.DumpIO)43 {44 Process.ErrorDataReceived += (sender, e) => Console.Error.WriteLine(e.Data);45 }46 }47 #endregion48 #region Dispose49 /// <summary>50 /// Finalizer.51 /// </summary>52 ~LauncherBase()53 {54 Dispose(false);55 }56 /// <inheritdoc />57 public void Dispose()58 {59 Dispose(true);60 GC.SuppressFinalize(this);61 }62 /// <summary>63 /// Disposes Base process and any temporary user directory.64 /// </summary>65 /// <param name="disposing">Indicates whether disposal was initiated by <see cref="Dispose()"/> operation.</param>66 protected virtual void Dispose(bool disposing) => _currentState.Dispose(this);67 #endregion68 #region Properties69 /// <summary>70 /// Gets Base process details.71 /// </summary>72 public Process Process { get; }73 /// <summary>74 /// Gets Base endpoint.75 /// </summary>76 public string EndPoint => _startCompletionSource.Task.IsCompleted77 ? _startCompletionSource.Task.Result78 : null;79 /// <summary>80 /// Indicates whether Base process is exiting.81 /// </summary>82 public bool IsExiting => _currentState.IsExiting;83 /// <summary>84 /// Indicates whether Base process has exited.85 /// </summary>86 public bool HasExited => _currentState.IsExited;87 internal TempDirectory TempUserDataDir { get; set; }88 /// <summary>89 /// Gets Base process current state.90 /// </summary>91 protected State CurrentState { get => _currentState; }92 #endregion93 #region Public methods94 /// <summary>95 /// Asynchronously starts Base process.96 /// </summary>97 /// <returns></returns>98 public Task StartAsync() => _currentState.StartAsync(this);99 /// <summary>100 /// Asynchronously waits for graceful Base process exit within a given timeout period.101 /// Kills the Base process if it has not exited within this period.102 /// </summary>103 /// <param name="timeout">The maximum waiting time for a graceful process exit.</param>104 /// <returns></returns>105 public Task EnsureExitAsync(TimeSpan? timeout) => timeout.HasValue106 ? _currentState.ExitAsync(this, timeout.Value)107 : _currentState.KillAsync(this);108 /// <summary>109 /// Asynchronously kills Base process.110 /// </summary>111 /// <returns></returns>112 public Task KillAsync() => _currentState.KillAsync(this);113 /// <summary>114 /// Waits for Base process exit within a given timeout.115 /// </summary>116 /// <param name="timeout">The maximum wait period.</param>117 /// <returns><c>true</c> if Base process has exited within the given <paramref name="timeout"/>,118 /// or <c>false</c> otherwise.</returns>119 public async Task<bool> WaitForExitAsync(TimeSpan? timeout)120 {121 if (timeout.HasValue)122 {123 bool taskCompleted = true;124 await _exitCompletionSource.Task.WithTimeout(125 () =>126 {127 taskCompleted = false;128 }, timeout.Value).ConfigureAwait(false);129 return taskCompleted;130 }131 await _exitCompletionSource.Task.ConfigureAwait(false);132 return true;133 }134 #endregion135 #region Private methods136 /// <summary>137 /// Set Env Variables138 /// </summary>139 /// <param name="environment">The environment.</param>140 /// <param name="customEnv">The customEnv.</param>141 /// <param name="realEnv">The realEnv.</param>142 protected static void SetEnvVariables(IDictionary<string, string> environment, IDictionary<string, string> customEnv, IDictionary realEnv)143 {144 foreach (DictionaryEntry item in realEnv)145 {146 environment[item.Key.ToString()] = item.Value.ToString();147 }148 if (customEnv != null)149 {150 foreach (var item in customEnv)151 {152 environment[item.Key] = item.Value;153 }154 }155 }156 #endregion157 #region State machine158 /// <summary>159 /// Represents state machine for Base process instances. The happy path runs along the160 /// following state transitions: <see cref="Initial"/>161 /// -> <see cref="Starting"/>162 /// -> <see cref="Started"/>163 /// -> <see cref="Exiting"/>164 /// -> <see cref="Exited"/>.165 /// -> <see cref="Disposed"/>.166 /// </summary>167 /// <remarks>168 /// <para>169 /// This state machine implements the following state transitions:170 /// <code>171 /// State Event Target State Action172 /// ======== =================== ============ ==========================================================173 /// Initial --StartAsync------> Starting Start process and wait for endpoint174 /// Initial --ExitAsync-------> Exited Cleanup temp user data175 /// Initial --KillAsync-------> Exited Cleanup temp user data176 /// Initial --Dispose---------> Disposed Cleanup temp user data177 /// Starting --StartAsync------> Starting -178 /// Starting --ExitAsync-------> Exiting Wait for process exit179 /// Starting --KillAsync-------> Killing Kill process180 /// Starting --Dispose---------> Disposed Kill process; Cleanup temp user data; throw ObjectDisposedException on outstanding async operations;181 /// Starting --endpoint ready--> Started Complete StartAsync successfully; Log process start182 /// Starting --process exit----> Exited Complete StartAsync with exception; Cleanup temp user data183 /// Started --StartAsync------> Started -184 /// Started --EnsureExitAsync-> Exiting Start exit timer; Log process exit185 /// Started --KillAsync-------> Killing Kill process; Log process exit186 /// Started --Dispose---------> Disposed Kill process; Log process exit; Cleanup temp user data; throw ObjectDisposedException on outstanding async operations;187 /// Started --process exit----> Exited Log process exit; Cleanup temp user data188 /// Exiting --StartAsync------> Exiting - (StartAsync throws InvalidOperationException)189 /// Exiting --ExitAsync-------> Exiting -190 /// Exiting --KillAsync-------> Killing Kill process191 /// Exiting --Dispose---------> Disposed Kill process; Cleanup temp user data; throw ObjectDisposedException on outstanding async operations;192 /// Exiting --exit timeout----> Killing Kill process193 /// Exiting --process exit----> Exited Cleanup temp user data; complete outstanding async operations;194 /// Killing --StartAsync------> Killing - (StartAsync throws InvalidOperationException)195 /// Killing --KillAsync-------> Killing -196 /// Killing --Dispose---------> Disposed Cleanup temp user data; throw ObjectDisposedException on outstanding async operations;197 /// Killing --process exit----> Exited Cleanup temp user data; complete outstanding async operations;198 /// Exited --StartAsync------> Killing - (StartAsync throws InvalidOperationException)199 /// Exited --KillAsync-------> Exited -200 /// Exited --Dispose---------> Disposed -201 /// Disposed --StartAsync------> Disposed -202 /// Disposed --KillAsync-------> Disposed -203 /// Disposed --Dispose---------> Disposed -204 /// </code>205 /// </para>206 /// </remarks>207 protected abstract class State208 {209 #region Predefined states210 /// <summary>211 /// Set initial state.212 /// </summary>213 public static readonly State Initial = new InitialState();214 private static readonly StartingState Starting = new StartingState();215 private static readonly StartedState Started = new StartedState();216 private static readonly ExitingState Exiting = new ExitingState();217 private static readonly KillingState Killing = new KillingState();218 private static readonly ExitedState Exited = new ExitedState();219 private static readonly DisposedState Disposed = new DisposedState();220 #endregion221 #region Properties222 /// <summary>223 /// Get If process exists.224 /// </summary>225 public bool IsExiting => this == Killing || this == Exiting;226 /// <summary>227 /// Get If process is exited.228 /// </summary>229 public bool IsExited => this == Exited || this == Disposed;230 #endregion231 #region Methods232 /// <summary>233 /// Attempts thread-safe transitions from a given state to this state.234 /// </summary>235 /// <param name="p">The Base process</param>236 /// <param name="fromState">The state from which state transition takes place</param>237 /// <returns>Returns <c>true</c> if transition is successful, or <c>false</c> if transition238 /// cannot be made because current state does not equal <paramref name="fromState"/>.</returns>239 protected bool TryEnter(LauncherBase p, State fromState)240 {241 if (Interlocked.CompareExchange(ref p._currentState, this, fromState) == fromState)242 {243 fromState.Leave(p);244 return true;245 }246 return false;247 }248 /// <summary>249 /// Notifies that state machine is about to transition to another state.250 /// </summary>251 /// <param name="p">The Base process</param>252 protected virtual void Leave(LauncherBase p)253 {254 }255 /// <summary>256 /// Handles process start request.257 /// </summary>258 /// <param name="p">The Base process</param>259 /// <returns></returns>260 public virtual Task StartAsync(LauncherBase p) => Task.FromException(InvalidOperation("start"));261 /// <summary>262 /// Handles process exit request.263 /// </summary>264 /// <param name="p">The Base process</param>265 /// <param name="timeout">The maximum waiting time for a graceful process exit.</param>266 /// <returns></returns>267 public virtual Task ExitAsync(LauncherBase p, TimeSpan timeout) => Task.FromException(InvalidOperation("exit"));268 /// <summary>269 /// Handles process kill request.270 /// </summary>271 /// <param name="p">The Base process</param>272 /// <returns></returns>273 public virtual Task KillAsync(LauncherBase p) => Task.FromException(InvalidOperation("kill"));274 /// <summary>275 /// Handles wait for process exit request.276 /// </summary>277 /// <param name="p">The Base process</param>278 /// <returns></returns>279 public virtual Task WaitForExitAsync(LauncherBase p) => p._exitCompletionSource.Task;280 /// <summary>281 /// Handles disposal of process and temporary user directory282 /// </summary>283 /// <param name="p"></param>284 public virtual void Dispose(LauncherBase p) => Disposed.EnterFrom(p, this);285 /// <inheritdoc />286 public override string ToString()287 {288 string name = GetType().Name;289 return name.Substring(0, name.Length - "State".Length);290 }291 private Exception InvalidOperation(string operationName)292 => new InvalidOperationException($"Cannot {operationName} in state {this}");293 /// <summary>294 /// Kills process if it is still alive.295 /// </summary>296 /// <param name="p"></param>297 private static void Kill(LauncherBase p)298 {299 try300 {301 if (!p.Process.HasExited)302 {303 p.Process.Kill();304 }305 }306 catch (InvalidOperationException)307 {308 // Ignore309 }310 }311 #endregion312 #region Concrete state classes313 private class InitialState : State314 {315 public override Task StartAsync(LauncherBase p) => Starting.EnterFromAsync(p, this);316 public override Task ExitAsync(LauncherBase p, TimeSpan timeout)317 {318 Exited.EnterFrom(p, this);319 return Task.CompletedTask;320 }321 public override Task KillAsync(LauncherBase p)322 {323 Exited.EnterFrom(p, this);324 return Task.CompletedTask;325 }326 public override Task WaitForExitAsync(LauncherBase p) => Task.FromException(InvalidOperation("wait for exit"));327 }328 private class StartingState : State329 {330 public Task EnterFromAsync(LauncherBase p, State fromState)331 {332 if (!TryEnter(p, fromState))333 {334 // Delegate StartAsync to current state, because it has already changed since335 // transition to this state was initiated.336 return p._currentState.StartAsync(p);337 }338 return StartCoreAsync(p);339 }340 public override Task StartAsync(LauncherBase p) => p._startCompletionSource.Task;341 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => Exiting.EnterFromAsync(p, this, timeout);342 public override Task KillAsync(LauncherBase p) => Killing.EnterFromAsync(p, this);343 public override void Dispose(LauncherBase p)344 {345 p._startCompletionSource.TrySetException(new ObjectDisposedException(p.ToString()));346 base.Dispose(p);347 }348 private async Task StartCoreAsync(LauncherBase p)349 {350 var output = new StringBuilder();351 void OnProcessDataReceivedWhileStarting(object sender, DataReceivedEventArgs e)352 {353 if (e.Data != null)354 {355 output.AppendLine(e.Data);356 var match = Regex.Match(e.Data, "^DevTools listening on (ws:\\/\\/.*)");357 if (match.Success)358 {359 p._startCompletionSource.TrySetResult(match.Groups[1].Value);360 }361 }362 }363 void OnProcessExitedWhileStarting(object sender, EventArgs e)364 => p._startCompletionSource.TrySetException(new ProcessException($"Failed to launch Base! {output}"));365 void OnProcessExited(object sender, EventArgs e) => Exited.EnterFrom(p, p._currentState);366 p.Process.ErrorDataReceived += OnProcessDataReceivedWhileStarting;367 p.Process.Exited += OnProcessExitedWhileStarting;368 p.Process.Exited += OnProcessExited;369 CancellationTokenSource cts = null;370 try371 {372 p.Process.Start();373 await Started.EnterFromAsync(p, this).ConfigureAwait(false);374 p.Process.BeginErrorReadLine();375 int timeout = p._options.Timeout;376 if (timeout > 0)377 {378 cts = new CancellationTokenSource(timeout);379 cts.Token.Register(() => p._startCompletionSource.TrySetException(380 new ProcessException($"Timed out after {timeout} ms while trying to connect to Base!")));381 }382 try383 {384 await p._startCompletionSource.Task.ConfigureAwait(false);385 await Started.EnterFromAsync(p, this).ConfigureAwait(false);386 }387 catch388 {389 await Killing.EnterFromAsync(p, this).ConfigureAwait(false);390 throw;391 }392 }393 finally394 {395 cts?.Dispose();396 p.Process.Exited -= OnProcessExitedWhileStarting;397 p.Process.ErrorDataReceived -= OnProcessDataReceivedWhileStarting;398 }399 }400 }401 private class StartedState : State402 {403 public Task EnterFromAsync(LauncherBase p, State fromState)404 {405 if (TryEnter(p, fromState))406 {407 }408 return Task.CompletedTask;409 }410 protected override void Leave(LauncherBase p) { }411 public override Task StartAsync(LauncherBase p) => Task.CompletedTask;412 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => Exiting.EnterFromAsync(p, this, timeout);413 public override Task KillAsync(LauncherBase p) => Killing.EnterFromAsync(p, this);414 }415 private class ExitingState : State416 {417 public Task EnterFromAsync(LauncherBase p, State fromState, TimeSpan timeout)418 => !TryEnter(p, fromState) ? p._currentState.ExitAsync(p, timeout) : ExitAsync(p, timeout);419 public override async Task ExitAsync(LauncherBase p, TimeSpan timeout)420 {421 var waitForExitTask = WaitForExitAsync(p);422 await waitForExitTask.WithTimeout(423 async () =>424 {425 await Killing.EnterFromAsync(p, this).ConfigureAwait(false);426 await waitForExitTask.ConfigureAwait(false);427 },428 timeout,429 CancellationToken.None).ConfigureAwait(false);430 }431 public override Task KillAsync(LauncherBase p) => Killing.EnterFromAsync(p, this);432 }433 private class KillingState : State434 {435 public async Task EnterFromAsync(LauncherBase p, State fromState)436 {437 if (!TryEnter(p, fromState))438 {439 // Delegate KillAsync to current state, because it has already changed since440 // transition to this state was initiated.441 await p._currentState.KillAsync(p).ConfigureAwait(false);442 }443 try444 {445 if (!p.Process.HasExited)446 {447 p.Process.Kill();448 }449 }450 catch (InvalidOperationException)451 {452 // Ignore453 return;454 }455 await WaitForExitAsync(p).ConfigureAwait(false);456 }457 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => WaitForExitAsync(p);458 public override Task KillAsync(LauncherBase p) => WaitForExitAsync(p);459 }460 private class ExitedState : State461 {462 public void EnterFrom(LauncherBase p, State fromState)463 {464 while (!TryEnter(p, fromState))465 {466 // Current state has changed since transition to this state was requested.467 // Therefore retry transition to this state from the current state. This ensures468 // that Leave() operation of current state is properly called.469 fromState = p._currentState;470 if (fromState == this)471 {472 return;473 }474 }475 p._exitCompletionSource.TrySetResult(true);476 p.TempUserDataDir?.Dispose();477 }478 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => Task.CompletedTask;479 public override Task KillAsync(LauncherBase p) => Task.CompletedTask;480 public override Task WaitForExitAsync(LauncherBase p) => Task.CompletedTask;481 }482 private class DisposedState : State483 {484 public void EnterFrom(LauncherBase p, State fromState)485 {486 if (!TryEnter(p, fromState))487 {488 // Delegate Dispose to current state, because it has already changed since489 // transition to this state was initiated.490 p._currentState.Dispose(p);491 }492 else if (fromState != Exited)493 {494 Kill(p);495 p._exitCompletionSource.TrySetException(new ObjectDisposedException(p.ToString()));496 p.TempUserDataDir?.Dispose();497 }498 }499 public override Task StartAsync(LauncherBase p) => throw new ObjectDisposedException(p.ToString());500 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => throw new ObjectDisposedException(p.ToString());501 public override Task KillAsync(LauncherBase p) => throw new ObjectDisposedException(p.ToString());502 public override void Dispose(LauncherBase p)503 {504 // Nothing to do505 }506 }507 #endregion508 }509 #endregion510 }511}...

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ChromiumStartingState.cs

Source:ChromiumStartingState.cs Github

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...10 {11 public ChromiumStartingState(StateManager stateManager) : base(stateManager)12 {13 }14 public override Task EnterFromAsync(LauncherBase p, State fromState, TimeSpan timeout)15 {16 if (!StateManager.TryEnter(p, fromState, this))17 {18 // Delegate StartAsync to current state, because it has already changed since19 // transition to this state was initiated.20 return StateManager.CurrentState.StartAsync(p);21 }22 return StartCoreAsync(p);23 }24 public override Task StartAsync(LauncherBase p) => p.StartCompletionSource.Task;25 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => StateManager.Exiting.EnterFromAsync(p, this, timeout);26 public override Task KillAsync(LauncherBase p) => StateManager.Killing.EnterFromAsync(p, this);27 public override void Dispose(LauncherBase p)28 {29 p.StartCompletionSource.TrySetException(new ObjectDisposedException(p.ToString()));30 base.Dispose(p);31 }32 protected virtual async Task StartCoreAsync(LauncherBase p)33 {34 var output = new StringBuilder();35 void OnProcessDataReceivedWhileStarting(object sender, DataReceivedEventArgs e)36 {37 if (e.Data != null)38 {39 output.AppendLine(e.Data);40 var match = Regex.Match(e.Data, "^DevTools listening on (ws:\\/\\/.*)");41 if (match.Success)42 {43 p.StartCompletionSource.TrySetResult(match.Groups[1].Value);44 }45 }46 }...

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KillingState.cs

Source:KillingState.cs Github

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...6 {7 public KillingState(StateManager stateManager) : base(stateManager)8 {9 }10 public override async Task EnterFromAsync(LauncherBase p, State fromState, TimeSpan timeout)11 {12 if (!StateManager.TryEnter(p, fromState, this))13 {14 // Delegate KillAsync to current state, because it has already changed since15 // transition to this state was initiated.16 await StateManager.CurrentState.KillAsync(p).ConfigureAwait(false);17 }18 try19 {20 if (!p.Process.HasExited)21 {22 p.Process.Kill();23 }24 }25 catch (InvalidOperationException)26 {27 // Ignore28 return;29 }30 await WaitForExitAsync(p).ConfigureAwait(false);31 }32 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => WaitForExitAsync(p);33 public override Task KillAsync(LauncherBase p) => WaitForExitAsync(p);34 }35}...

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ExitedState.cs

Source:ExitedState.cs Github

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...6 {7 public ExitedState(StateManager stateManager) : base(stateManager)8 {9 }10 public void EnterFrom(LauncherBase p, State fromState)11 {12 while (!StateManager.TryEnter(p, fromState, this))13 {14 // Current state has changed since transition to this state was requested.15 // Therefore retry transition to this state from the current state. This ensures16 // that Leave() operation of current state is properly called.17 fromState = StateManager.CurrentState;18 if (fromState == this)19 {20 return;21 }22 }23 p.ExitCompletionSource.TrySetResult(true);24 p.TempUserDataDir?.Dispose();25 }26 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => Task.CompletedTask;27 public override Task KillAsync(LauncherBase p) => Task.CompletedTask;28 public override Task WaitForExitAsync(LauncherBase p) => Task.CompletedTask;29 }30}...

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ExitingState.cs

Source:ExitingState.cs Github

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...8 {9 public ExitingState(StateManager stateManager) : base(stateManager)10 {11 }12 public override Task EnterFromAsync(LauncherBase p, State fromState, TimeSpan timeout)13 => !StateManager.TryEnter(p, fromState, this) ? StateManager.CurrentState.ExitAsync(p, timeout) : ExitAsync(p, timeout);14 public override async Task ExitAsync(LauncherBase p, TimeSpan timeout)15 {16 var waitForExitTask = WaitForExitAsync(p);17 await waitForExitTask.WithTimeout(18 async () =>19 {20 await StateManager.Killing.EnterFromAsync(p, this, timeout).ConfigureAwait(false);21 await waitForExitTask.ConfigureAwait(false);22 },23 timeout,24 CancellationToken.None).ConfigureAwait(false);25 }26 public override Task KillAsync(LauncherBase p) => StateManager.Killing.EnterFromAsync(p, this);27 }28}...

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DisposedState.cs

Source:DisposedState.cs Github

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...6 {7 public DisposedState(StateManager stateManager) : base(stateManager)8 {9 }10 public override Task EnterFromAsync(LauncherBase p, State fromState, TimeSpan timeSpan)11 {12 if (fromState == StateManager.Exited)13 {14 return null;15 }16 Kill(p);17 p.ExitCompletionSource.TrySetException(new ObjectDisposedException(p.ToString()));18 p.TempUserDataDir?.Dispose();19 return null;20 }21 public override Task StartAsync(LauncherBase p) => throw new ObjectDisposedException(p.ToString());22 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => throw new ObjectDisposedException(p.ToString());23 public override Task KillAsync(LauncherBase p) => throw new ObjectDisposedException(p.ToString());24 public override void Dispose(LauncherBase p)25 {26 // Nothing to do27 }28 }29}...

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InitialState.cs

Source:InitialState.cs Github

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...6 {7 public InitialState(StateManager stateManager) : base(stateManager)8 {9 }10 public override Task StartAsync(LauncherBase p) => StateManager.Starting.EnterFromAsync(p, this, TimeSpan.Zero);11 public override Task ExitAsync(LauncherBase p, TimeSpan timeout)12 {13 StateManager.Exited.EnterFromAsync(p, this);14 return Task.CompletedTask;15 }16 public override Task KillAsync(LauncherBase p)17 {18 StateManager.Exited.EnterFromAsync(p, this);19 return Task.CompletedTask;20 }21 public override Task WaitForExitAsync(LauncherBase p) => Task.FromException(InvalidOperation("wait for exit"));22 private Exception InvalidOperation(string v)23 {24 throw new NotImplementedException();25 }26 }27}...

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StartedState.cs

Source:StartedState.cs Github

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...6 {7 public StartedState(StateManager stateManager) : base(stateManager)8 {9 }10 public override Task EnterFromAsync(LauncherBase p, State fromState, TimeSpan timeout)11 {12 StateManager.TryEnter(p, fromState, this);13 return Task.CompletedTask;14 }15 public override Task StartAsync(LauncherBase p) => Task.CompletedTask;16 public override Task ExitAsync(LauncherBase p, TimeSpan timeout) => new ExitingState(StateManager).EnterFromAsync(p, this, timeout);17 public override Task KillAsync(LauncherBase p) => new KillingState(StateManager).EnterFromAsync(p, this);18 }19}...

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LauncherBase

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 {9 Args = new string[] { "--start-maximized" }10 };11 using (var browser = await Puppeteer.LaunchAsync(options))12 {13 var page = await browser.NewPageAsync();14 await page.ScreenshotAsync("google.png");15 }16 }17 }18}19using System;20using System.Threading.Tasks;21using PuppeteerSharp;22{23 {24 static async Task Main(string[] args)25 {26 {27 Args = new string[] { "--start-maximized" }28 };29 using (var browser = await Puppeteer.LaunchAsync(options))30 {31 var page = await browser.NewPageAsync();32 await page.ScreenshotAsync("google.png");33 }34 }35 }36}37using System;38using System.Threading.Tasks;39using PuppeteerSharp;40{41 {42 static async Task Main(string[] args)43 {44 {45 Args = new string[] { "--start-maximized" }46 };47 using (var browser = await Puppeteer.LaunchAsync(options))48 {49 var page = await browser.NewPageAsync();50 await page.ScreenshotAsync("google.png");51 }52 }53 }54}55using System;56using System.Threading.Tasks;57using PuppeteerSharp;58{59 {60 static async Task Main(string[] args)61 {62 {

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LauncherBase

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 Console.WriteLine("Hello World!");9 var options = new LaunchOptions { Headless = true };10 using (var browser = await Puppeteer.LaunchAsync(options))11 {12 using (var page = await browser.NewPageAsync())13 {14 await page.ScreenshotAsync("google.png");15 }16 }17 }18 }19}

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LauncherBase

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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 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions13 {14 Args = new string[] { "--no-sandbox" }15 }))16 {17 var page = await browser.NewPageAsync();18 Console.ReadKey();19 }20 }21 }22}

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LauncherBase

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1using PuppeteerSharp;2using System.Threading.Tasks;3{4 {5 static async Task Main(string[] args)6 {7 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);8 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))9 {

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LauncherBase

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 static void Main(string[] args)7 {8 RunAsync().Wait();9 }10 static async Task RunAsync()11 {12 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))13 {14 using (var page = await browser.NewPageAsync())15 {16 await Task.Delay(5000);17 }18 }19 }20 }21}22using PuppeteerSharp;23using System;24using System.Threading.Tasks;25{26 {27 static void Main(string[] args)28 {29 RunAsync().Wait();30 }31 static async Task RunAsync()32 {33 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))34 {35 using (var page = await browser.NewPageAsync())36 {37 await Task.Delay(5000);38 }39 }40 }41 }42}43using PuppeteerSharp;44using System;45using System.Threading.Tasks;46{47 {48 static void Main(string[] args)49 {50 RunAsync().Wait();51 }52 static async Task RunAsync()53 {54 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))55 {56 using (var page = await browser.NewPageAsync())57 {58 await Task.Delay(5000);59 }60 }61 }62 }63}

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LauncherBase

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 public static Task<Browser> LaunchAsync(LaunchOptions options = null)7 {8 return Task.FromResult(new Browser());9 }10 }11}12using PuppeteerSharp;13using System;14using System.Threading.Tasks;15{16 {17 public Task<Page> NewPageAsync()18 {19 return Task.FromResult(new Page());20 }21 }22}23using PuppeteerSharp;24using System;25using System.Threading.Tasks;26{27 {28 public Task<string> GoToAsync(string url, NavigationOptions options = null)29 {30 return Task.FromResult("Page");31 }32 }33}34using PuppeteerSharp;35using System;36using System.Threading.Tasks;37{38 {39 }40}41using PuppeteerSharp;42using System;43using System.Threading.Tasks;44{45 {46 static void Main(string[] args)47 {48 var task = MainAsync();49 task.Wait();50 }51 static async Task MainAsync()52 {53 var options = new LaunchOptions { Headless = true };54 using (var browser = await LauncherBase.LaunchAsync(options))55 using (var page = await browser.NewPageAsync())56 {57 }58 }59 }60}

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LauncherBase

Using AI Code Generation

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 public static async Task MainTest(string[] args)7 {8 {9 Args = new[] { "--disable-extensions" }10 };11 using (var browser = await Puppeteer.LaunchAsync(options))12 {13 using (var page = await browser.NewPageAsync())14 {15 await page.ScreenshotAsync(@"C:\Users\Public\Pictures\Sample Pictures\chromium.png");16 }17 }18 }19 }20}

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LauncherBase

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 });11 var page = await browser.NewPageAsync();12 Console.WriteLine("Title of the page: " + await page.GetTitleAsync());13 await browser.CloseAsync();14 }15 }16}17using System;18using System.Threading.Tasks;19using PuppeteerSharp;20{21 {22 static async Task Main(string[] args)23 {24 var browser = await Puppeteer.LaunchAsync(new LaunchOptions25 {26 });27 var page = await browser.NewPageAsync();28 await page.TypeAsync("input[title='Search']", "puppeteer");29 await page.Keyboard.PressAsync("Enter");30 Console.WriteLine("Title of the page: " + await page.GetTitleAsync());31 await browser.CloseAsync();32 }33 }34}

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Automation Testing Tutorials

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LambdaTest Learning Hubs:

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You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.

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