How to use PageErrorEventArgs class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.PageErrorEventArgs

Page.cs

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...161 public event EventHandler<RequestEventArgs> RequestFailed;162 /// <summary>163 /// Raised when an uncaught exception happens within the page.164 /// </summary>165 public event EventHandler<PageErrorEventArgs> PageError;166 ///// <summary>167 ///// Emitted when a dedicated WebWorker (<see href="https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API"/>) is spawned by the page.168 ///// </summary>169 //public event EventHandler<WorkerEventArgs> WorkerCreated;170 ///// <summary>171 ///// Emitted when a dedicated WebWorker (<see href="https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API"/>) is terminated.172 ///// </summary>173 //public event EventHandler<WorkerEventArgs> WorkerDestroyed;174 /// <summary>175 /// Raised when the page closes.176 /// </summary>177 public event EventHandler Close;178 /// <summary>179 /// Raised when the page opens a new tab or window.180 /// </summary>181 public event EventHandler<PopupEventArgs> Popup;182 /// <summary>183 /// This setting will change the default maximum time for the following methods:184 /// - <see cref="GoToAsync(string, NavigationOptions)"/>185 /// - <see cref="GoBackAsync(NavigationOptions)"/>186 /// - <see cref="GoForwardAsync(NavigationOptions)"/>187 /// - <see cref="ReloadAsync(NavigationOptions)"/>188 /// - <see cref="SetContentAsync(string, NavigationOptions)"/>189 /// - <see cref="WaitForNavigationAsync(NavigationOptions)"/>190 /// **NOTE** <see cref="DefaultNavigationTimeout"/> takes priority over <seealso cref="DefaultTimeout"/>191 /// </summary>192 public int DefaultNavigationTimeout193 {194 get => _timeoutSettings.NavigationTimeout;195 set => _timeoutSettings.NavigationTimeout = value;196 }197 /// <summary>198 /// This setting will change the default maximum times for the following methods:199 /// - <see cref="GoBackAsync(NavigationOptions)"/>200 /// - <see cref="GoForwardAsync(NavigationOptions)"/>201 /// - <see cref="GoToAsync(string, NavigationOptions)"/>202 /// - <see cref="ReloadAsync(NavigationOptions)"/>203 /// - <see cref="SetContentAsync(string, NavigationOptions)"/>204 /// - <see cref="WaitForFunctionAsync(string, object[])"/>205 /// - <see cref="WaitForNavigationAsync(NavigationOptions)"/>206 /// - <see cref="WaitForRequestAsync(string, WaitForOptions)"/>207 /// - <see cref="WaitForResponseAsync(string, WaitForOptions)"/>208 /// - <see cref="WaitForXPathAsync(string, WaitForSelectorOptions)"/>209 /// - <see cref="WaitForSelectorAsync(string, WaitForSelectorOptions)"/>210 /// - <see cref="WaitForExpressionAsync(string, WaitForFunctionOptions)"/>211 /// </summary>212 public int DefaultTimeout213 {214 get => _timeoutSettings.Timeout;215 set => _timeoutSettings.Timeout = value;216 }217 /// <summary>218 /// Gets page's main frame219 /// </summary>220 /// <remarks>221 /// Page is guaranteed to have a main frame which persists during navigations.222 /// </remarks>223 public Frame MainFrame => FrameManager.MainFrame;224 /// <summary>225 /// Gets all frames attached to the page.226 /// </summary>227 /// <value>An array of all frames attached to the page.</value>228 public Frame[] Frames => FrameManager.GetFrames();229 ///// <summary>230 ///// Gets all workers in the page.231 ///// </summary>232 //public Worker[] Workers => _workers.Values.ToArray();233 /// <summary>234 /// Shortcut for <c>page.MainFrame.Url</c>235 /// </summary>236 public string Url => MainFrame.Url;237 /// <summary>238 /// Gets that target this page was created from.239 /// </summary>240 public Target Target { get; }241 /// <summary>242 /// Gets this page's keyboard243 /// </summary>244 public Keyboard Keyboard { get; }245 /// <summary>246 /// Gets this page's touchscreen247 /// </summary>248 public Touchscreen Touchscreen { get; }249 /// <summary>250 /// Gets this page's coverage251 /// </summary>252 public Coverage Coverage { get; }253 /// <summary>254 /// Gets this page's mouse255 /// </summary>256 public Mouse Mouse { get; }257 /// <summary>258 /// Gets this page's viewport259 /// </summary>260 public ViewPortOptions Viewport { get; private set; }261 /// <summary>262 /// List of supported metrics provided by the <see cref="Metrics"/> event.263 /// </summary>264 public static readonly IEnumerable<string> SupportedMetrics = new List<string>265 {266 "Timestamp",267 "Documents",268 "Frames",269 "JSEventListeners",270 "Nodes",271 "LayoutCount",272 "RecalcStyleCount",273 "LayoutDuration",274 "RecalcStyleDuration",275 "ScriptDuration",276 "TaskDuration",277 "JSHeapUsedSize",278 "JSHeapTotalSize"279 };280 /// <summary>281 /// Get the browser the page belongs to.282 /// </summary>283 public Browser Browser => Target.Browser;284 /// <summary>285 /// Get the browser context that the page belongs to.286 /// </summary>287 public BrowserContext BrowserContext => Target.BrowserContext;288 /// <summary>289 /// Get an indication that the page has been closed.290 /// </summary>291 public bool IsClosed { get; private set; }292 /// <summary>293 /// Gets the accessibility.294 /// </summary>295 public Accessibility Accessibility { get; }296 internal bool JavascriptEnabled { get; set; } = true;297 internal bool HasPopupEventListeners => Popup?.GetInvocationList().Any() == true;298 internal FrameManager FrameManager { get; private set; }299 private Task SessionClosedTask300 {301 get302 {303 if (_sessionClosedTcs == null)304 {305 _sessionClosedTcs = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);306 Client.Disconnected += clientDisconnected;307 void clientDisconnected(object sender, EventArgs e)308 {309 _sessionClosedTcs.TrySetException(new TargetClosedException("Target closed", "Session closed"));310 Client.Disconnected -= clientDisconnected;311 }312 }313 return _sessionClosedTcs.Task;314 }315 }316 #endregion317 #region Public Methods318 /// <summary>319 /// A utility function to be used with <see cref="Extensions.EvaluateFunctionAsync{T}(Task{JSHandle}, string, object[])"/>320 /// </summary>321 /// <param name="selector">A selector to query page for</param>322 /// <returns>Task which resolves to a <see cref="JSHandle"/> of <c>document.querySelectorAll</c> result</returns>323 public Task<JSHandle> QuerySelectorAllHandleAsync(string selector)324 => EvaluateFunctionHandleAsync("selector => Array.from(document.querySelectorAll(selector))", selector);325 /// <summary>326 /// Executes a script in browser context327 /// </summary>328 /// <param name="script">Script to be evaluated in browser context</param>329 /// <remarks>330 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.331 /// </remarks>332 /// <returns>Task which resolves to script return value</returns>333 public async Task<JSHandle> EvaluateExpressionHandleAsync(string script)334 {335 var context = await MainFrame.GetExecutionContextAsync().ConfigureAwait(false);336 return await context.EvaluateExpressionHandleAsync(script).ConfigureAwait(false);337 }338 /// <summary>339 /// Executes a script in browser context340 /// </summary>341 /// <param name="pageFunction">Script to be evaluated in browser context</param>342 /// <param name="args">Function arguments</param>343 /// <remarks>344 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.345 /// <see cref="JSHandle"/> instances can be passed as arguments346 /// </remarks>347 /// <returns>Task which resolves to script return value</returns>348 public async Task<JSHandle> EvaluateFunctionHandleAsync(string pageFunction, params object[] args)349 {350 var context = await MainFrame.GetExecutionContextAsync().ConfigureAwait(false);351 return await context.EvaluateFunctionHandleAsync(pageFunction, args).ConfigureAwait(false);352 }353 /// <summary>354 /// Activating request interception enables <see cref="Request.AbortAsync(RequestAbortErrorCode)">request.AbortAsync</see>, 355 /// <see cref="Request.ContinueAsync(Payload)">request.ContinueAsync</see> and <see cref="Request.RespondAsync(ResponseData)">request.RespondAsync</see> methods.356 /// </summary>357 /// <returns>The request interception task.</returns>358 /// <param name="value">Whether to enable request interception..</param>359 public Task SetRequestInterceptionAsync(bool value)360 => FrameManager.NetworkManager.SetRequestInterceptionAsync(value);361 /// <summary>362 /// Set offline mode for the page.363 /// </summary>364 /// <returns>Result task</returns>365 /// <param name="value">When <c>true</c> enables offline mode for the page.</param>366 public Task SetOfflineModeAsync(bool value) => FrameManager.NetworkManager.SetOfflineModeAsync(value);367 /// <summary>368 /// Adds a <c><![CDATA[<script>]]></c> tag into the page with the desired url or content369 /// </summary>370 /// <param name="options">add script tag options</param>371 /// <remarks>372 /// Shortcut for <c>page.MainFrame.AddScriptTagAsync(options)</c>373 /// </remarks>374 /// <returns>Task which resolves to the added tag when the script's onload fires or when the script content was injected into frame</returns>375 /// <seealso cref="Frame.AddScriptTagAsync(AddTagOptions)"/>376 public Task<ElementHandle> AddScriptTagAsync(AddTagOptions options) => MainFrame.AddScriptTagAsync(options);377 /// <summary>378 /// Adds a <c><![CDATA[<script>]]></c> tag into the page with the desired url or content379 /// </summary>380 /// <param name="url">script url</param>381 /// <remarks>382 /// Shortcut for <c>page.MainFrame.AddScriptTagAsync(new AddTagOptions { Url = url })</c>383 /// </remarks>384 /// <returns>Task which resolves to the added tag when the script's onload fires or when the script content was injected into frame</returns>385 public Task<ElementHandle> AddScriptTagAsync(string url) => AddScriptTagAsync(new AddTagOptions { Url = url });386 /// <summary>387 /// Adds a <c><![CDATA[<link rel="stylesheet">]]></c> tag into the page with the desired url or a <c><![CDATA[<link rel="stylesheet">]]></c> tag with the content388 /// </summary>389 /// <param name="options">add style tag options</param>390 /// <remarks>391 /// Shortcut for <c>page.MainFrame.AddStyleTagAsync(options)</c>392 /// </remarks>393 /// <returns>Task which resolves to the added tag when the stylesheet's onload fires or when the CSS content was injected into frame</returns>394 /// <seealso cref="Frame.AddStyleTag(AddTagOptions)"/>395 public Task<ElementHandle> AddStyleTagAsync(AddTagOptions options) => MainFrame.AddStyleTagAsync(options);396 /// <summary>397 /// Adds a <c><![CDATA[<link rel="stylesheet">]]></c> tag into the page with the desired url or a <c><![CDATA[<link rel="stylesheet">]]></c> tag with the content398 /// </summary>399 /// <param name="url">stylesheel url</param>400 /// <remarks>401 /// Shortcut for <c>page.MainFrame.AddStyleTagAsync(new AddTagOptions { Url = url })</c>402 /// </remarks>403 /// <returns>Task which resolves to the added tag when the stylesheet's onload fires or when the CSS content was injected into frame</returns>404 public Task<ElementHandle> AddStyleTagAsync(string url) => AddStyleTagAsync(new AddTagOptions { Url = url });405 /// <summary>406 /// Adds a function called <c>name</c> on the page's <c>window</c> object.407 /// When called, the function executes <paramref name="puppeteerFunction"/> in C# and returns a <see cref="Task"/> which resolves when <paramref name="puppeteerFunction"/> completes.408 /// </summary>409 /// <param name="name">Name of the function on the window object</param>410 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>411 /// <remarks>412 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.413 /// Functions installed via <see cref="ExposeFunctionAsync(string, Action)"/> survive navigations414 /// </remarks>415 /// <returns>Task</returns>416 public Task ExposeFunctionAsync(string name, Action puppeteerFunction)417 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);418 /// <summary>419 /// Adds a function called <c>name</c> on the page's <c>window</c> object.420 /// When called, the function executes <paramref name="puppeteerFunction"/> in C# and returns a <see cref="Task"/> which resolves to the return value of <paramref name="puppeteerFunction"/>.421 /// </summary>422 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>423 /// <param name="name">Name of the function on the window object</param>424 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>425 /// <remarks>426 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.427 /// Functions installed via <see cref="ExposeFunctionAsync{TResult}(string, Func{TResult})"/> survive navigations428 /// </remarks>429 /// <returns>Task</returns>430 public Task ExposeFunctionAsync<TResult>(string name, Func<TResult> puppeteerFunction)431 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);432 /// <summary>433 /// Adds a function called <c>name</c> on the page's <c>window</c> object.434 /// When called, the function executes <paramref name="puppeteerFunction"/> in C# and returns a <see cref="Task"/> which resolves to the return value of <paramref name="puppeteerFunction"/>.435 /// </summary>436 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>437 /// <typeparam name="T">The parameter of <paramref name="puppeteerFunction"/></typeparam>438 /// <param name="name">Name of the function on the window object</param>439 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>440 /// <remarks>441 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.442 /// Functions installed via <see cref="ExposeFunctionAsync{T, TResult}(string, Func{T, TResult})"/> survive navigations443 /// </remarks>444 /// <returns>Task</returns>445 public Task ExposeFunctionAsync<T, TResult>(string name, Func<T, TResult> puppeteerFunction)446 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);447 /// <summary>448 /// Adds a function called <c>name</c> on the page's <c>window</c> object.449 /// When called, the function executes <paramref name="puppeteerFunction"/> in C# and returns a <see cref="Task"/> which resolves to the return value of <paramref name="puppeteerFunction"/>.450 /// </summary>451 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>452 /// <typeparam name="T1">The first parameter of <paramref name="puppeteerFunction"/></typeparam>453 /// <typeparam name="T2">The second parameter of <paramref name="puppeteerFunction"/></typeparam>454 /// <param name="name">Name of the function on the window object</param>455 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>456 /// <remarks>457 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.458 /// Functions installed via <see cref="ExposeFunctionAsync{T1, T2, TResult}(string, Func{T1, T2, TResult})"/> survive navigations459 /// </remarks>460 /// <returns>Task</returns>461 public Task ExposeFunctionAsync<T1, T2, TResult>(string name, Func<T1, T2, TResult> puppeteerFunction)462 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);463 /// <summary>464 /// Adds a function called <c>name</c> on the page's <c>window</c> object.465 /// When called, the function executes <paramref name="puppeteerFunction"/> in C# and returns a <see cref="Task"/> which resolves to the return value of <paramref name="puppeteerFunction"/>.466 /// </summary>467 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>468 /// <typeparam name="T1">The first parameter of <paramref name="puppeteerFunction"/></typeparam>469 /// <typeparam name="T2">The second parameter of <paramref name="puppeteerFunction"/></typeparam>470 /// <typeparam name="T3">The third parameter of <paramref name="puppeteerFunction"/></typeparam>471 /// <param name="name">Name of the function on the window object</param>472 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>473 /// <remarks>474 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.475 /// Functions installed via <see cref="ExposeFunctionAsync{T1, T2, T3, TResult}(string, Func{T1, T2, T3, TResult})"/> survive navigations476 /// </remarks>477 /// <returns>Task</returns>478 public Task ExposeFunctionAsync<T1, T2, T3, TResult>(string name, Func<T1, T2, T3, TResult> puppeteerFunction)479 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);480 /// <summary>481 /// Adds a function called <c>name</c> on the page's <c>window</c> object.482 /// When called, the function executes <paramref name="puppeteerFunction"/> in C# and returns a <see cref="Task"/> which resolves to the return value of <paramref name="puppeteerFunction"/>.483 /// </summary>484 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>485 /// <typeparam name="T1">The first parameter of <paramref name="puppeteerFunction"/></typeparam>486 /// <typeparam name="T2">The second parameter of <paramref name="puppeteerFunction"/></typeparam>487 /// <typeparam name="T3">The third parameter of <paramref name="puppeteerFunction"/></typeparam>488 /// <typeparam name="T4">The fourth parameter of <paramref name="puppeteerFunction"/></typeparam>489 /// <param name="name">Name of the function on the window object</param>490 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>491 /// <remarks>492 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.493 /// Functions installed via <see cref="ExposeFunctionAsync{T1, T2, T3, T4, TResult}(string, Func{T1, T2, T3, T4, TResult})"/> survive navigations494 /// </remarks>495 /// <returns>Task</returns>496 public Task ExposeFunctionAsync<T1, T2, T3, T4, TResult>(string name, Func<T1, T2, T3, T4, TResult> puppeteerFunction)497 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);498 /// <summary>499 /// Gets the full HTML contents of the page, including the doctype.500 /// </summary>501 /// <returns>Task which resolves to the HTML content.</returns>502 /// <seealso cref="Frame.GetContentAsync"/>503 public Task<string> GetContentAsync() => FrameManager.MainFrame.GetContentAsync();504 /// <summary>505 /// Sets the HTML markup to the page506 /// </summary>507 /// <param name="html">HTML markup to assign to the page.</param>508 /// <param name="options">The navigations options</param>509 /// <returns>Task.</returns>510 /// <seealso cref="Frame.SetContentAsync(string, NavigationOptions)"/>511 public Task SetContentAsync(string html, NavigationOptions options = null) => FrameManager.MainFrame.SetContentAsync(html, options);512 /// <summary>513 /// Navigates to an url514 /// </summary>515 /// <remarks>516 /// <see cref="GoToAsync(string, int?, WaitUntilNavigation[])"/> will throw an error if:517 /// - there's an SSL error (e.g. in case of self-signed certificates).518 /// - target URL is invalid.519 /// - the `timeout` is exceeded during navigation.520 /// - the remote server does not respond or is unreachable.521 /// - the main resource failed to load.522 /// 523 /// <see cref="GoToAsync(string, int?, WaitUntilNavigation[])"/> will not throw an error when any valid HTTP status code is returned by the remote server, 524 /// including 404 "Not Found" and 500 "Internal Server Error". The status code for such responses can be retrieved by calling <see cref="Response.Status"/>525 /// 526 /// > **NOTE** <see cref="GoToAsync(string, int?, WaitUntilNavigation[])"/> either throws an error or returns a main resource response. 527 /// The only exceptions are navigation to `about:blank` or navigation to the same URL with a different hash, which would succeed and return `null`.528 /// 529 /// > **NOTE** Headless mode doesn't support navigation to a PDF document. See the <see fref="https://bugs.chromium.org/p/chromium/issues/detail?id=761295">upstream issue</see>.530 /// 531 /// Shortcut for <seealso cref="Frame.GoToAsync(string, int?, WaitUntilNavigation[])"/>532 /// </remarks>533 /// <param name="url">URL to navigate page to. The url should include scheme, e.g. https://.</param>534 /// <param name="options">Navigation parameters.</param>535 /// <returns>Task which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect.</returns>536 /// <seealso cref="GoToAsync(string, int?, WaitUntilNavigation[])"/>537 public Task<Response> GoToAsync(string url, NavigationOptions options) => FrameManager.MainFrame.GoToAsync(url, options);538 /// <summary>539 /// Navigates to an url540 /// </summary>541 /// <param name="url">URL to navigate page to. The url should include scheme, e.g. https://.</param>542 /// <param name="timeout">Maximum navigation time in milliseconds, defaults to 30 seconds, pass <c>0</c> to disable timeout. </param>543 /// <param name="waitUntil">When to consider navigation succeeded, defaults to <see cref="WaitUntilNavigation.Load"/>. Given an array of <see cref="WaitUntilNavigation"/>, navigation is considered to be successful after all events have been fired</param>544 /// <returns>Task which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect</returns>545 /// <seealso cref="GoToAsync(string, NavigationOptions)"/>546 public Task<Response> GoToAsync(string url, int? timeout = null, WaitUntilNavigation[] waitUntil = null)547 => GoToAsync(url, new NavigationOptions { Timeout = timeout, WaitUntil = waitUntil });548 /// <summary>549 /// Navigates to an url550 /// </summary>551 /// <param name="url">URL to navigate page to. The url should include scheme, e.g. https://.</param>552 /// <param name="waitUntil">When to consider navigation succeeded.</param>553 /// <returns>Task which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect</returns>554 /// <seealso cref="GoToAsync(string, NavigationOptions)"/>555 public Task<Response> GoToAsync(string url, WaitUntilNavigation waitUntil)556 => GoToAsync(url, new NavigationOptions { WaitUntil = new[] { waitUntil } });557 /// <summary>558 /// generates a pdf of the page with <see cref="MediaType.Print"/> css media. To generate a pdf with <see cref="MediaType.Screen"/> media call <see cref="EmulateMediaAsync(MediaType)"/> with <see cref="MediaType.Screen"/>559 /// </summary>560 /// <param name="file">The file path to save the PDF to. paths are resolved using <see cref="Path.GetFullPath(string)"/></param>561 /// <returns></returns>562 /// <remarks>563 /// Generating a pdf is currently only supported in Chrome headless564 /// </remarks>565 public Task PdfAsync(string file) => PdfAsync(file, new PdfOptions());566 /// <summary>567 /// generates a pdf of the page with <see cref="MediaType.Print"/> css media. To generate a pdf with <see cref="MediaType.Screen"/> media call <see cref="EmulateMediaAsync(MediaType)"/> with <see cref="MediaType.Screen"/>568 /// </summary>569 /// <param name="file">The file path to save the PDF to. paths are resolved using <see cref="Path.GetFullPath(string)"/></param>570 /// <param name="options">pdf options</param>571 /// <returns></returns>572 /// <remarks>573 /// Generating a pdf is currently only supported in Chrome headless574 /// </remarks>575 public async Task PdfAsync(string file, PdfOptions options)576 => await PdfInternalAsync(file, options).ConfigureAwait(false);577 /// <summary>578 /// generates a pdf of the page with <see cref="MediaType.Print"/> css media. To generate a pdf with <see cref="MediaType.Screen"/> media call <see cref="EmulateMediaAsync(MediaType)"/> with <see cref="MediaType.Screen"/>579 /// </summary>580 /// <returns>Task which resolves to a <see cref="Stream"/> containing the PDF data.</returns>581 /// <remarks>582 /// Generating a pdf is currently only supported in Chrome headless583 /// </remarks>584 public Task<Stream> PdfStreamAsync() => PdfStreamAsync(new PdfOptions());585 /// <summary>586 /// Generates a pdf of the page with <see cref="MediaType.Print"/> css media. To generate a pdf with <see cref="MediaType.Screen"/> media call <see cref="EmulateMediaAsync(MediaType)"/> with <see cref="MediaType.Screen"/>587 /// </summary>588 /// <param name="options">pdf options</param>589 /// <returns>Task which resolves to a <see cref="Stream"/> containing the PDF data.</returns>590 /// <remarks>591 /// Generating a pdf is currently only supported in Chrome headless592 /// </remarks>593 public async Task<Stream> PdfStreamAsync(PdfOptions options)594 => new MemoryStream(await PdfDataAsync(options).ConfigureAwait(false));595 /// <summary>596 /// Generates a pdf of the page with <see cref="MediaType.Print"/> css media. To generate a pdf with <see cref="MediaType.Screen"/> media call <see cref="EmulateMediaAsync(MediaType)"/> with <see cref="MediaType.Screen"/>597 /// </summary>598 /// <returns>Task which resolves to a <see cref="byte"/>[] containing the PDF data.</returns>599 /// <remarks>600 /// Generating a pdf is currently only supported in Chrome headless601 /// </remarks>602 public Task<byte[]> PdfDataAsync() => PdfDataAsync(new PdfOptions());603 /// <summary>604 /// Generates a pdf of the page with <see cref="MediaType.Print"/> css media. To generate a pdf with <see cref="MediaType.Screen"/> media call <see cref="EmulateMediaAsync(MediaType)"/> with <see cref="MediaType.Screen"/>605 /// </summary>606 /// <param name="options">pdf options</param>607 /// <returns>Task which resolves to a <see cref="byte"/>[] containing the PDF data.</returns>608 /// <remarks>609 /// Generating a pdf is currently only supported in Chrome headless610 /// </remarks>611 public Task<byte[]> PdfDataAsync(PdfOptions options) => PdfInternalAsync(null, options);612 internal async Task<byte[]> PdfInternalAsync(string file, PdfOptions options)613 {614 var paperWidth = PaperFormat.Letter.Width;615 var paperHeight = PaperFormat.Letter.Height;616 if (options.Format != null)617 {618 paperWidth = options.Format.Width;619 paperHeight = options.Format.Height;620 }621 else622 {623 if (options.Width != null)624 {625 paperWidth = ConvertPrintParameterToInches(options.Width);626 }627 if (options.Height != null)628 {629 paperHeight = ConvertPrintParameterToInches(options.Height);630 }631 }632 var marginTop = ConvertPrintParameterToInches(options.MarginOptions.Top);633 var marginLeft = ConvertPrintParameterToInches(options.MarginOptions.Left);634 var marginBottom = ConvertPrintParameterToInches(options.MarginOptions.Bottom);635 var marginRight = ConvertPrintParameterToInches(options.MarginOptions.Right);636 var result = await Client.SendAsync<PagePrintToPDFResponse>("Page.printToPDF", new PagePrintToPDFRequest637 {638 TransferMode = "ReturnAsStream",639 Landscape = options.Landscape,640 DisplayHeaderFooter = options.DisplayHeaderFooter,641 HeaderTemplate = options.HeaderTemplate,642 FooterTemplate = options.FooterTemplate,643 PrintBackground = options.PrintBackground,644 Scale = options.Scale,645 PaperWidth = paperWidth,646 PaperHeight = paperHeight,647 MarginTop = marginTop,648 MarginBottom = marginBottom,649 MarginLeft = marginLeft,650 MarginRight = marginRight,651 PageRanges = options.PageRanges,652 PreferCSSPageSize = options.PreferCSSPageSize653 }).ConfigureAwait(false);654 return await ProtocolStreamReader.ReadProtocolStreamByteAsync(Client, result.Stream, file).ConfigureAwait(false);655 }656 /// <summary>657 /// Enables/Disables Javascript on the page658 /// </summary>659 /// <returns>Task.</returns>660 /// <param name="enabled">Whether or not to enable JavaScript on the page.</param>661 public Task SetJavaScriptEnabledAsync(bool enabled)662 {663 if (enabled == JavascriptEnabled)664 {665 return Task.CompletedTask;666 }667 JavascriptEnabled = enabled;668 return Client.SendAsync("Emulation.setScriptExecutionDisabled", new EmulationSetScriptExecutionDisabledRequest669 {670 Value = !enabled671 });672 }673 /// <summary>674 /// Toggles bypassing page's Content-Security-Policy.675 /// </summary>676 /// <param name="enabled">sets bypassing of page's Content-Security-Policy.</param>677 /// <returns></returns>678 /// <remarks>679 /// CSP bypassing happens at the moment of CSP initialization rather then evaluation.680 /// Usually this means that <see cref="SetBypassCSPAsync(bool)"/> should be called before navigating to the domain.681 /// </remarks>682 public Task SetBypassCSPAsync(bool enabled) => Client.SendAsync("Page.setBypassCSP", new PageSetBypassCSPRequest683 {684 Enabled = enabled685 });686 /// <summary>687 /// Emulates a media such as screen or print.688 /// </summary>689 /// <returns>Task.</returns>690 /// <param name="media">Media to set.</param>691 [Obsolete("User EmulateMediaTypeAsync instead")]692 public Task EmulateMediaAsync(MediaType media) => EmulateMediaTypeAsync(media);693 /// <summary>694 /// Emulates a media such as screen or print.695 /// </summary>696 /// <param name="type">Media to set.</param>697 /// <example>698 /// <code>699 /// <![CDATA[700 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('screen').matches)");701 /// // → true702 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('print').matches)");703 /// // → true704 /// await page.EmulateMediaTypeAsync(MediaType.Print);705 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('screen').matches)");706 /// // → false707 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('print').matches)");708 /// // → true709 /// await page.EmulateMediaTypeAsync(MediaType.None);710 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('screen').matches)");711 /// // → true712 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('print').matches)");713 /// // → true714 /// ]]>715 /// </code>716 /// </example>717 /// <returns>Emulate media type task.</returns>718 public Task EmulateMediaTypeAsync(MediaType type)719 => Client.SendAsync("Emulation.setEmulatedMedia", new EmulationSetEmulatedMediaTypeRequest { Media = type });720 /// <summary>721 /// Given an array of media feature objects, emulates CSS media features on the page.722 /// </summary>723 /// <param name="features">Features to apply</param>724 /// <example>725 /// <code>726 /// <![CDATA[727 /// await page.EmulateMediaFeaturesAsync(new MediaFeature[]{ new MediaFeature { MediaFeature = MediaFeature.PrefersColorScheme, Value = "dark" }});728 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-color-scheme: dark)').matches)");729 /// // → true730 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-color-scheme: light)').matches)");731 /// // → false732 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-color-scheme: no-preference)').matches)");733 /// // → false734 /// await page.EmulateMediaFeaturesAsync(new MediaFeature[]{ new MediaFeature { MediaFeature = MediaFeature.PrefersReducedMotion, Value = "reduce" }});735 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-reduced-motion: reduce)').matches)");736 /// // → true737 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-color-scheme: no-preference)').matches)");738 /// // → false739 /// await page.EmulateMediaFeaturesAsync(new MediaFeature[]740 /// { 741 /// new MediaFeature { MediaFeature = MediaFeature.PrefersColorScheme, Value = "dark" },742 /// new MediaFeature { MediaFeature = MediaFeature.PrefersReducedMotion, Value = "reduce" },743 /// });744 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-color-scheme: dark)').matches)");745 /// // → true746 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-color-scheme: light)').matches)");747 /// // → false748 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-color-scheme: no-preference)').matches)");749 /// // → false750 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-reduced-motion: reduce)').matches)");751 /// // → true752 /// await page.EvaluateFunctionAsync<bool>("() => matchMedia('(prefers-color-scheme: no-preference)').matches)");753 /// // → false754 /// ]]>755 /// </code>756 /// </example>757 /// <returns>Emulate features task</returns>758 public Task EmulateMediaFeaturesAsync(IEnumerable<MediaFeatureValue> features)759 => Client.SendAsync("Emulation.setEmulatedMedia", new EmulationSetEmulatedMediaFeatureRequest { Features = features });760 /// <summary>761 /// Sets the viewport.762 /// In the case of multiple pages in a single browser, each page can have its own viewport size.763 /// <see cref="SetViewportAsync(ViewPortOptions)"/> will resize the page. A lot of websites don't expect phones to change size, so you should set the viewport before navigating to the page.764 /// </summary>765 /// <example>766 ///<![CDATA[767 /// using(var page = await browser.NewPageAsync())768 /// {769 /// await page.SetViewPortAsync(new ViewPortOptions770 /// {771 /// Width = 640, 772 /// Height = 480, 773 /// DeviceScaleFactor = 1774 /// });775 /// await page.goto('https://www.example.com');776 /// }777 /// ]]>778 /// </example>779 /// <returns>The viewport task.</returns>780 /// <param name="viewport">Viewport options.</param>781 public async Task SetViewportAsync(ViewPortOptions viewport)782 {783 var needsReload = await _emulationManager.EmulateViewport(viewport).ConfigureAwait(false);784 Viewport = viewport;785 if (needsReload)786 {787 await ReloadAsync().ConfigureAwait(false);788 }789 }790 /// <summary>791 /// Closes the page.792 /// </summary>793 /// <param name="options">Close options.</param>794 /// <returns>Task.</returns>795 public Task CloseAsync(PageCloseOptions options = null)796 {797 if (!(Client?.Connection?.IsClosed ?? true))798 {799 var runBeforeUnload = options?.RunBeforeUnload ?? false;800 if (runBeforeUnload)801 {802 return Client.SendAsync("Page.close");803 }804 return Client.Connection.SendAsync("Target.closeTarget", new TargetCloseTargetRequest805 {806 TargetId = Target.TargetId807 }).ContinueWith(task => Target.CloseTask);808 }809 return _closeCompletedTcs.Task;810 }811 /// <summary>812 /// Reloads the page813 /// </summary>814 /// <param name="options">Navigation options</param>815 /// <returns>Task which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect</returns>816 /// <seealso cref="ReloadAsync(int?, WaitUntilNavigation[])"/>817 public async Task<Response> ReloadAsync(NavigationOptions options)818 {819 var navigationTask = WaitForNavigationAsync(options);820 await Task.WhenAll(821 navigationTask,822 Client.SendAsync("Page.reload")823 ).ConfigureAwait(false);824 return navigationTask.Result;825 }826 /// <summary>827 /// Reloads the page828 /// </summary>829 /// <param name="timeout">Maximum navigation time in milliseconds, defaults to 30 seconds, pass <c>0</c> to disable timeout. </param>830 /// <param name="waitUntil">When to consider navigation succeeded, defaults to <see cref="WaitUntilNavigation.Load"/>. Given an array of <see cref="WaitUntilNavigation"/>, navigation is considered to be successful after all events have been fired</param>831 /// <returns>Task which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect</returns>832 /// <seealso cref="ReloadAsync(NavigationOptions)"/>833 public Task<Response> ReloadAsync(int? timeout = null, WaitUntilNavigation[] waitUntil = null)834 => ReloadAsync(new NavigationOptions { Timeout = timeout, WaitUntil = waitUntil });835 /// <summary>836 /// Waits for a function to be evaluated to a truthy value837 /// </summary>838 /// <param name="script">Function to be evaluated in browser context</param>839 /// <param name="options">Optional waiting parameters</param>840 /// <param name="args">Arguments to pass to <c>script</c></param>841 /// <returns>A task that resolves when the <c>script</c> returns a truthy value</returns>842 /// <seealso cref="Frame.WaitForFunctionAsync(string, WaitForFunctionOptions, object[])"/>843 public Task<JSHandle> WaitForFunctionAsync(string script, WaitForFunctionOptions options = null, params object[] args)844 => MainFrame.WaitForFunctionAsync(script, options ?? new WaitForFunctionOptions(), args);845 /// <summary>846 /// Waits for an expression to be evaluated to a truthy value847 /// </summary>848 /// <param name="script">Expression to be evaluated in browser context</param>849 /// <param name="options">Optional waiting parameters</param>850 /// <returns>A task that resolves when the <c>script</c> returns a truthy value</returns>851 /// <seealso cref="Frame.WaitForExpressionAsync(string, WaitForFunctionOptions)"/>852 public Task<JSHandle> WaitForExpressionAsync(string script, WaitForFunctionOptions options = null)853 => MainFrame.WaitForExpressionAsync(script, options ?? new WaitForFunctionOptions());854 /// <summary>855 /// Waits for a selector to be added to the DOM856 /// </summary>857 /// <param name="selector">A selector of an element to wait for</param>858 /// <param name="options">Optional waiting parameters</param>859 /// <returns>A task that resolves when element specified by selector string is added to DOM.860 /// Resolves to `null` if waiting for `hidden: true` and selector is not found in DOM.</returns>861 /// <seealso cref="WaitForXPathAsync(string, WaitForSelectorOptions)"/>862 /// <seealso cref="Frame.WaitForSelectorAsync(string, WaitForSelectorOptions)"/>863 public Task<ElementHandle> WaitForSelectorAsync(string selector, WaitForSelectorOptions options = null)864 => MainFrame.WaitForSelectorAsync(selector, options ?? new WaitForSelectorOptions());865 /// <summary>866 /// Waits for a xpath selector to be added to the DOM867 /// </summary>868 /// <param name="xpath">A xpath selector of an element to wait for</param>869 /// <param name="options">Optional waiting parameters</param>870 /// <returns>A task which resolves when element specified by xpath string is added to DOM. 871 /// Resolves to `null` if waiting for `hidden: true` and xpath is not found in DOM.</returns>872 /// <example>873 /// <code>874 /// <![CDATA[875 /// var browser = await Puppeteer.LaunchAsync(new LaunchOptions());876 /// var page = await browser.NewPageAsync();877 /// string currentURL = null;878 /// page879 /// .WaitForXPathAsync("//img")880 /// .ContinueWith(_ => Console.WriteLine("First URL with image: " + currentURL));881 /// foreach (var current in new[] { "https://example.com", "https://google.com", "https://bbc.com" })882 /// {883 /// currentURL = current;884 /// await page.GoToAsync(currentURL);885 /// }886 /// await browser.CloseAsync();887 /// ]]>888 /// </code>889 /// </example>890 /// <seealso cref="WaitForSelectorAsync(string, WaitForSelectorOptions)"/>891 /// <seealso cref="Frame.WaitForXPathAsync(string, WaitForSelectorOptions)"/>892 public Task<ElementHandle> WaitForXPathAsync(string xpath, WaitForSelectorOptions options = null)893 => MainFrame.WaitForXPathAsync(xpath, options ?? new WaitForSelectorOptions());894 /// <summary>895 /// This resolves when the page navigates to a new URL or reloads.896 /// It is useful for when you run code which will indirectly cause the page to navigate.897 /// </summary>898 /// <param name="options">navigation options</param>899 /// <returns>Task which resolves to the main resource response. 900 /// In case of multiple redirects, the navigation will resolve with the response of the last redirect.901 /// In case of navigation to a different anchor or navigation due to History API usage, the navigation will resolve with `null`.902 /// </returns>903 /// <remarks>904 /// Usage of the <c>History API</c> <see href="https://developer.mozilla.org/en-US/docs/Web/API/History_API"/> to change the URL is considered a navigation905 /// </remarks>906 /// <example>907 /// <code>908 /// <![CDATA[909 /// var navigationTask = page.WaitForNavigationAsync();910 /// await page.ClickAsync("a.my-link");911 /// await navigationTask;912 /// ]]>913 /// </code>914 /// </example>915 public Task<Response> WaitForNavigationAsync(NavigationOptions options = null) => FrameManager.WaitForFrameNavigationAsync(FrameManager.MainFrame, options);916 /// <summary>917 /// Waits for a request.918 /// </summary>919 /// <example>920 /// <code>921 /// <![CDATA[922 /// var firstRequest = await page.WaitForRequestAsync("http://example.com/resource");923 /// return firstRequest.Url;924 /// ]]>925 /// </code>926 /// </example>927 /// <returns>A task which resolves when a matching request was made.</returns>928 /// <param name="url">URL to wait for.</param>929 /// <param name="options">Options.</param>930 public Task<Request> WaitForRequestAsync(string url, WaitForOptions options = null)931 => WaitForRequestAsync(request => request.Url == url, options);932 /// <summary>933 /// Waits for a request.934 /// </summary>935 /// <example>936 /// <code>937 /// <![CDATA[938 /// var request = await page.WaitForRequestAsync(request => request.Url === "http://example.com" && request.Method === HttpMethod.Get;939 /// return request.Url;940 /// ]]>941 /// </code>942 /// </example>943 /// <returns>A task which resolves when a matching request was made.</returns>944 /// <param name="predicate">Function which looks for a matching request.</param>945 /// <param name="options">Options.</param>946 public async Task<Request> WaitForRequestAsync(Func<Request, bool> predicate, WaitForOptions options = null)947 {948 var timeout = options?.Timeout ?? DefaultTimeout;949 var requestTcs = new TaskCompletionSource<Request>(TaskCreationOptions.RunContinuationsAsynchronously);950 void requestEventListener(object sender, RequestEventArgs e)951 {952 if (predicate(e.Request))953 {954 requestTcs.TrySetResult(e.Request);955 FrameManager.NetworkManager.Request -= requestEventListener;956 }957 }958 FrameManager.NetworkManager.Request += requestEventListener;959 await Task.WhenAny(requestTcs.Task, SessionClosedTask).WithTimeout(timeout, t =>960 {961 FrameManager.NetworkManager.Request -= requestEventListener;962 return new TimeoutException($"Timeout of {t.TotalMilliseconds} ms exceeded");963 }).ConfigureAwait(false);964 if (SessionClosedTask.IsFaulted)965 {966 await SessionClosedTask.ConfigureAwait(false);967 }968 return await requestTcs.Task.ConfigureAwait(false);969 }970 /// <summary>971 /// Waits for a response.972 /// </summary>973 /// <example>974 /// <code>975 /// <![CDATA[976 /// var firstResponse = await page.WaitForResponseAsync("http://example.com/resource");977 /// return firstResponse.Url;978 /// ]]>979 /// </code>980 /// </example>981 /// <returns>A task which resolves when a matching response is received.</returns>982 /// <param name="url">URL to wait for.</param>983 /// <param name="options">Options.</param>984 public Task<Response> WaitForResponseAsync(string url, WaitForOptions options = null)985 => WaitForResponseAsync(response => response.Url == url, options);986 /// <summary>987 /// Waits for a response.988 /// </summary>989 /// <example>990 /// <code>991 /// <![CDATA[992 /// var response = await page.WaitForResponseAsync(response => response.Url === "http://example.com" && response.Status === HttpStatus.Ok;993 /// return response.Url;994 /// ]]>995 /// </code>996 /// </example>997 /// <returns>A task which resolves when a matching response is received.</returns>998 /// <param name="predicate">Function which looks for a matching response.</param>999 /// <param name="options">Options.</param>1000 public async Task<Response> WaitForResponseAsync(Func<Response, bool> predicate, WaitForOptions options = null)1001 {1002 var timeout = options?.Timeout ?? DefaultTimeout;1003 var responseTcs = new TaskCompletionSource<Response>(TaskCreationOptions.RunContinuationsAsynchronously);1004 void responseEventListener(object sender, ResponseCreatedEventArgs e)1005 {1006 if (predicate(e.Response))1007 {1008 responseTcs.TrySetResult(e.Response);1009 FrameManager.NetworkManager.Response -= responseEventListener;1010 }1011 }1012 FrameManager.NetworkManager.Response += responseEventListener;1013 await Task.WhenAny(responseTcs.Task, SessionClosedTask).WithTimeout(timeout).ConfigureAwait(false);1014 if (SessionClosedTask.IsFaulted)1015 {1016 await SessionClosedTask.ConfigureAwait(false);1017 }1018 return await responseTcs.Task.ConfigureAwait(false);1019 }1020 /// <summary>1021 /// Navigate to the previous page in history.1022 /// </summary>1023 /// <returns>Task that resolves to the main resource response. In case of multiple redirects, 1024 /// the navigation will resolve with the response of the last redirect. If can not go back, resolves to null.</returns>1025 /// <param name="options">Navigation parameters.</param>1026 public Task<Response> GoBackAsync(NavigationOptions options = null) => GoAsync(-1, options);1027 /// <summary>1028 /// Navigate to the next page in history.1029 /// </summary>1030 /// <returns>Task that resolves to the main resource response. In case of multiple redirects, 1031 /// the navigation will resolve with the response of the last redirect. If can not go forward, resolves to null.</returns>1032 /// <param name="options">Navigation parameters.</param>1033 public Task<Response> GoForwardAsync(NavigationOptions options = null) => GoAsync(1, options);1034 /// <summary>1035 /// Resets the background color and Viewport after taking Screenshots using BurstMode.1036 /// </summary>1037 /// <returns>The burst mode off.</returns>1038 public Task SetBurstModeOffAsync()1039 {1040 return Task.CompletedTask;1041 }1042 #endregion1043 internal void OnPopup(Page popupPage) => Popup?.Invoke(this, new PopupEventArgs { PopupPage = popupPage });1044 #region Private Method1045 internal static async Task<Page> CreateAsync(1046 CDPSession client,1047 Target target,1048 bool ignoreHTTPSErrors,1049 ViewPortOptions defaultViewPort,1050 TaskQueue screenshotTaskQueue)1051 {1052 var page = new Page(client, target, screenshotTaskQueue);1053 await page.InitializeAsync(ignoreHTTPSErrors).ConfigureAwait(false);1054 if (defaultViewPort != null)1055 {1056 await page.SetViewportAsync(defaultViewPort).ConfigureAwait(false);1057 }1058 return page;1059 }1060 private async Task InitializeAsync(bool ignoreHTTPSErrors)1061 {1062 FrameManager = await FrameManager.CreateFrameManagerAsync(Client, this, ignoreHTTPSErrors, _timeoutSettings).ConfigureAwait(false);1063 var networkManager = FrameManager.NetworkManager;1064 Client.MessageReceived += Client_MessageReceived;1065 FrameManager.FrameAttached += (sender, e) => FrameAttached?.Invoke(this, e);1066 FrameManager.FrameDetached += (sender, e) => FrameDetached?.Invoke(this, e);1067 FrameManager.FrameNavigated += (sender, e) => FrameNavigated?.Invoke(this, e);1068 networkManager.Request += (sender, e) => Request?.Invoke(this, e);1069 networkManager.RequestFailed += (sender, e) => RequestFailed?.Invoke(this, e);1070 networkManager.Response += (sender, e) => Response?.Invoke(this, e);1071 networkManager.RequestFinished += (sender, e) => RequestFinished?.Invoke(this, e);1072 await Task.WhenAll(1073 Client.SendAsync("Target.setAutoAttach", new TargetSetAutoAttachRequest1074 {1075 AutoAttach = true,1076 WaitForDebuggerOnStart = false,1077 Flatten = true1078 }),1079 Client.SendAsync("Performance.enable", null),1080 Client.SendAsync("Log.enable", null)1081 ).ConfigureAwait(false);1082 try1083 {1084 await Client.SendAsync("Page.setInterceptFileChooserDialog", new PageSetInterceptFileChooserDialog1085 {1086 Enabled = true1087 }).ConfigureAwait(false);1088 }1089 catch1090 {1091 }1092 }1093 private async Task<Response> GoAsync(int delta, NavigationOptions options)1094 {1095 var history = await Client.SendAsync<PageGetNavigationHistoryResponse>("Page.getNavigationHistory").ConfigureAwait(false);1096 if (history.Entries.Count <= history.CurrentIndex + delta)1097 {1098 return null;1099 }1100 var entry = history.Entries[history.CurrentIndex + delta];1101 var waitTask = WaitForNavigationAsync(options);1102 await Task.WhenAll(1103 waitTask,1104 Client.SendAsync("Page.navigateToHistoryEntry", new PageNavigateToHistoryEntryRequest1105 {1106 EntryId = entry.Id1107 })1108 ).ConfigureAwait(false);1109 return waitTask.Result;1110 }1111 private decimal ConvertPrintParameterToInches(object parameter)1112 {1113 if (parameter == null)1114 {1115 return 0;1116 }1117 decimal pixels;1118 if (parameter is decimal || parameter is int)1119 {1120 pixels = Convert.ToDecimal(parameter);1121 }1122 else1123 {1124 var text = parameter.ToString();1125 var unit = text.Substring(text.Length - 2).ToLower();1126 string valueText;1127 if (_unitToPixels.ContainsKey(unit))1128 {1129 valueText = text.Substring(0, text.Length - 2);1130 }1131 else1132 {1133 // In case of unknown unit try to parse the whole parameter as number of pixels.1134 // This is consistent with phantom's paperSize behavior.1135 unit = "px";1136 valueText = text;1137 }1138 if (decimal.TryParse(valueText, NumberStyles.Any, CultureInfo.InvariantCulture.NumberFormat, out var number))1139 {1140 pixels = number * _unitToPixels[unit];1141 }1142 else1143 {1144 throw new ArgumentException($"Failed to parse parameter value: '{text}'", nameof(parameter));1145 }1146 }1147 return pixels / 96;1148 }1149 private async void Client_MessageReceived(object sender, MessageEventArgs e)1150 {1151 try1152 {1153 switch (e.MessageID)1154 {1155 case "Page.domContentEventFired":1156 DOMContentLoaded?.Invoke(this, EventArgs.Empty);1157 break;1158 case "Page.loadEventFired":1159 Load?.Invoke(this, EventArgs.Empty);1160 break;1161 case "Runtime.exceptionThrown":1162 HandleException(e.MessageData.ToObject<RuntimeExceptionThrownResponse>(true).ExceptionDetails);1163 break;1164 case "Inspector.targetCrashed":1165 OnTargetCrashed();1166 break;1167 case "Target.attachedToTarget":1168 await OnAttachedToTargetAsync(e.MessageData.ToObject<TargetAttachedToTargetResponse>(true)).ConfigureAwait(false);1169 break;1170 case "Runtime.bindingCalled":1171 await OnBindingCalled(e.MessageData.ToObject<BindingCalledResponse>(true)).ConfigureAwait(false);1172 break;1173 }1174 }1175 catch (Exception ex)1176 {1177 var message = $"Page failed to process {e.MessageID}. {ex.Message}. {ex.StackTrace}";1178 Client.Close(message);1179 }1180 }1181 private async Task OnBindingCalled(BindingCalledResponse e)1182 {1183 string expression;1184 try1185 {1186 var result = await ExecuteBinding(e).ConfigureAwait(false);1187 expression = EvaluationString(1188 @"function deliverResult(name, seq, result) {1189 window[name]['callbacks'].get(seq).resolve(result);1190 window[name]['callbacks'].delete(seq);1191 }",1192 e.BindingPayload.Name,1193 e.BindingPayload.Seq,1194 result);1195 }1196 catch (Exception ex)1197 {1198 if (ex is TargetInvocationException)1199 {1200 ex = ex.InnerException;1201 }1202 expression = EvaluationString(1203 @"function deliverError(name, seq, message, stack) {1204 const error = new Error(message);1205 error.stack = stack;1206 window[name]['callbacks'].get(seq).reject(error);1207 window[name]['callbacks'].delete(seq);1208 }",1209 e.BindingPayload.Name,1210 e.BindingPayload.Seq,1211 ex.Message,1212 ex.StackTrace);1213 }1214 Client.Send("Runtime.evaluate", new1215 {1216 expression,1217 contextId = e.ExecutionContextId1218 });1219 }1220 private async Task<object> ExecuteBinding(BindingCalledResponse e)1221 {1222 const string taskResultPropertyName = "Result";1223 object result;1224 var binding = _pageBindings[e.BindingPayload.Name];1225 var methodParams = binding.Method.GetParameters().Select(parameter => parameter.ParameterType).ToArray();1226 var args = e.BindingPayload.Args.Select((token, i) => token.ToObject(methodParams[i])).ToArray();1227 result = binding.DynamicInvoke(args);1228 if (result is Task taskResult)1229 {1230 await taskResult.ConfigureAwait(false);1231 if (taskResult.GetType().IsGenericType)1232 {1233 // the task is already awaited and therefore the call to property Result will not deadlock1234 result = taskResult.GetType().GetProperty(taskResultPropertyName).GetValue(taskResult);1235 }1236 }1237 return result;1238 }1239 private async Task OnAttachedToTargetAsync(TargetAttachedToTargetResponse e)1240 {1241 var targetInfo = e.TargetInfo;1242 var sessionId = e.SessionId;1243 if (targetInfo.Type != TargetType.Worker)1244 {1245 try1246 {1247 await Client.SendAsync("Target.detachFromTarget", new TargetDetachFromTargetRequest1248 {1249 SessionId = sessionId1250 }).ConfigureAwait(false);1251 }1252 catch { }1253 return;1254 }1255 }1256 private void OnTargetCrashed()1257 {1258 if (Error == null)1259 {1260 throw new TargetCrashedException();1261 }1262 Error.Invoke(this, new ErrorEventArgs("Page crashed!"));1263 }1264 private void HandleException(EvaluateExceptionResponseDetails exceptionDetails)1265 => PageError?.Invoke(this, new PageErrorEventArgs(GetExceptionMessage(exceptionDetails)));1266 private string GetExceptionMessage(EvaluateExceptionResponseDetails exceptionDetails)1267 {1268 if (exceptionDetails.Exception != null)1269 {1270 return exceptionDetails.Exception.Description;1271 }1272 var message = exceptionDetails.Text;1273 if (exceptionDetails.StackTrace != null)1274 {1275 foreach (var callframe in exceptionDetails.StackTrace.CallFrames)1276 {1277 var location = $"{callframe.Url}:{callframe.LineNumber}:{callframe.ColumnNumber}";1278 var functionName = callframe.FunctionName ?? "<anonymous>";1279 message += $"\n at {functionName} ({location})";...

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PuppeteerBrowserBuilder.cs

Source:PuppeteerBrowserBuilder.cs Github

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...520 Convert.ToInt32((timeSpan ?? TimeSpan.FromSeconds(30)).Milliseconds), waitUntilNavigations);521 LogGoToResponse(stringUrl, resp);522 return page;523 }524 private void Page_PageError(object sender, PageErrorEventArgs e)525 {526 _logger.Error(e.Message);527 }528 private void Page_Request(object sender, RequestEventArgs e)529 {530 _logger.Debug($"{e.Request?.Method}:{e.Request?.ResourceType.ToString()}:{e.Request?.Url}");531 }532 private void LogGoToResponse(string stringUrl, Response resp)533 {534 if (resp != null)535 {536 var respLogEvent = new LogEventInfo(LogLevel.Info, string.Empty, $"goto response to {stringUrl}");537 respLogEvent.Properties["FromCache"] = resp.FromCache;538 respLogEvent.Properties["Url"] = resp.Url;...

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BrowserContext.cs

Source:BrowserContext.cs Github

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...219 {220 Console.WriteLine($"Page_Metrics: {e.Title}, {e.Metrics.Count}");221 }222 }223 private void Page_PageError(object sender, PageErrorEventArgs e)224 {225 if (DebugInfo)226 {227 Console.WriteLine($"Page_PageError: {e.Message}");228 }229 }230 private void Page_Popup(object sender, PopupEventArgs e)231 {232 if (DebugInfo)233 {234 Console.WriteLine($"Page_Popup: {e.PopupPage.Url}");235 }236 }237 private void Page_Request(object sender, RequestEventArgs e)...

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BrowserInstance.cs

Source:BrowserInstance.cs Github

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...150 private void OnCurrentBrowserInstanceOnClosed(object? sender, EventArgs args) =>151 App.PuppeteerLogger.Information($"Browser closed.");152 private void OnCurrentPageInstanceOnDialog(object? sender, DialogEventArgs args) =>153 App.PuppeteerLogger.Information($"{args.Dialog.DialogType} {args.Dialog.Message}");154 private void OnCurrentPageInstanceOnPageInstanceError(object? sender, PageErrorEventArgs args) =>155 App.PuppeteerLogger.Error($"PageError {args.Message}");156 private void OnCurrentPageInstanceOnClose(object? sender, EventArgs args) =>157 App.PuppeteerLogger.Information($"Page closed.");158 private void OnCurrentPageInstanceOnRequestFailed(object? sender, RequestEventArgs args) =>159 App.PuppeteerLogger.Error($"{args.Request.Method.Method} {args.Request.Url}");160 private void OnCurrentPageInstanceOnDomContentLoaded(object? sender, EventArgs args) =>161 App.PuppeteerLogger.Information($"DOMLoaded {CurrentPageInstance.Url}");162 private void OnCurrentPageInstanceOnError(object? sender, ErrorEventArgs args) =>163 App.PuppeteerLogger.Error($"{args.Error}");164 private void OnCurrentPageInstanceOnLoad(object? sender, EventArgs args) =>165 App.PuppeteerLogger.Information($"OnLoaded {CurrentPageInstance.Url}");166 private void OnCurrentPageInstanceOnFrameNavigated(object? sender, FrameEventArgs args) =>167 App.PuppeteerLogger.Information($"Navigated to {args.Frame.Url}");168 public void DeleteUserData()...

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PageEventsPageErrorTests.cs

Source:PageEventsPageErrorTests.cs Github

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...15 [SkipBrowserFact(skipFirefox: true)]16 public async Task ShouldFire()17 {18 string error = null;19 void EventHandler(object sender, PageErrorEventArgs e)20 {21 error = e.Message;22 Page.PageError -= EventHandler;23 }24 Page.PageError += EventHandler;25 await Task.WhenAll(26 Page.GoToAsync(TestConstants.ServerUrl + "/error.html"),27 WaitEvent(Page.Client, "Runtime.exceptionThrown")28 );29 Assert.Contains("Fancy", error);30 }31 }32}...

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PageErrorTests.cs

Source:PageErrorTests.cs Github

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...12 [Fact]13 public async Task ShouldFire()14 {15 string error = null;16 void EventHandler(object sender, PageErrorEventArgs e)17 {18 error = e.Message;19 Page.PageError -= EventHandler;20 }21 Page.PageError += EventHandler;22 await Task.WhenAll(23 Page.GoToAsync(TestConstants.ServerUrl + "/error.html"),24 WaitForEvents(Page.Client, "Runtime.exceptionThrown")25 );26 Assert.Contains("Fancy", error);27 }28 }29}...

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PageErrorEventArgs.cs

Source:PageErrorEventArgs.cs Github

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...3{4 /// <summary>5 /// Page error event arguments.6 /// </summary>7 public class PageErrorEventArgs : EventArgs8 {9 /// <summary>10 /// Error Message11 /// </summary>12 /// <value>The message.</value>13 public string Message { get; set; }14 /// <summary>15 /// Initializes a new instance of the <see cref="PageErrorEventArgs"/> class.16 /// </summary>17 /// <param name="message">Message.</param>18 public PageErrorEventArgs(string message) => Message = message;19 }20}...

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PageErrorEventArgs

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 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions10 {11 Args = new string[] { "--enable-automation" }12 });13 var page = await browser.NewPageAsync();14 page.PageError += (sender, e) =>15 {16 Console.WriteLine(e.Message);17 };18 await page.EvaluateExpressionAsync("not.existing.object.property");19 await browser.CloseAsync();20 }21 }22}23 at ExecutionContext._evaluateInternal (C:\Users\Karthik\source\repos\PuppeteerSharpExample\PuppeteerSharpExample\node_modules\puppeteer\lib\ExecutionContext.js:122:19)24 at ExecutionContext.evaluate (C:\Users\Karthik\source\repos\PuppeteerSharpExample\PuppeteerSharpExample\node_modules\puppeteer\lib\ExecutionContext.js:48:16)25 at Frame.evaluate (C:\Users\Karthik\source\repos\PuppeteerSharpExample\PuppeteerSharpExample\node_modules\puppeteer\lib\FrameManager.js:1023:20)26 at Page.evaluate (C:\Users\Karthik\source\repos\PuppeteerSharpExample\PuppeteerSharpExample\node_modules\puppeteer\lib\Page.js:1241:33)27 at Program.Main (C:\Users\Karthik\source\repos\PuppeteerSharpExample\PuppeteerSharpExample\1.cs:24:43)28 at ExecutionContext._evaluateInternal (C:\Users\Karthik\source\repos\PuppeteerSharpExample\PuppeteerSharpExample\node_modules\puppeteer\lib\ExecutionContext.js:122:19)29 at ExecutionContext.evaluate (C:\Users\Karthik\source\repos\PuppeteerSharpExample

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PageErrorEventArgs

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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[] { "--no-sandbox" }11 });12 var page = await browser.NewPageAsync();13 page.PageError += Page_PageError;14 await page.ScreenshotAsync("google.png");15 Console.WriteLine("Hello World!");16 await browser.CloseAsync();17 }18 private static void Page_PageError(object sender, PageErrorEventArgs e)19 {20 Console.WriteLine(e.Message);21 }22 }23}24 at Object.handleInterceptedRequest (/home/abhishek/Downloads/PuppeteerTest/node_modules/puppeteer/lib/NetworkManager.js:186:15)25 at CDPSession.Page.client.on.event (/home/abhishek/Downloads/PuppeteerTest/node_modules/puppeteer/lib/NetworkManager.js:86:50)26 at CDPSession.emit (events.js:315:20)27 at CDPSession.EventEmitter.emit (domain.js:483:12)28 at CDPSession._onMessage (/home/abhishek/Downloads/PuppeteerTest/node_modules/puppeteer/lib/Connection.js:200:12)29 at Connection._onMessage (/home/abhishek/Downloads/PuppeteerTest/node_modules/puppeteer/lib/Connection.js:112:17)30 at WebSocketTransport._ws.addEventListener.event (/home/abhishek/Downloads/PuppeteerTest/node_modules/puppeteer/lib/WebSocketTransport.js:44:24)31 at WebSocket.onMessage (/home/abhishek/Downloads/PuppeteerTest/node_modules/ws/lib/event-target.js:132:16)32 at WebSocket.emit (events.js:315:20)33 at WebSocket.EventEmitter.emit (domain.js:483:12)34 at Receiver.receiverOnMessage (/home/abhishek/Downloads/PuppeteerTest/node_modules/ws/lib/websocket.js:789:20)35 at Receiver.emit (events.js:315:20)36 at Receiver.EventEmitter.emit (domain.js:483:12)37 at Receiver.dataMessage (/home/

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PageErrorEventArgs

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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 LaunchOptions { Headless = false });9 var page = await browser.NewPageAsync();10 await page.ScreenshotAsync("google.png");11 await browser.CloseAsync();12 }13 private static void Page_PageError(object sender, PageErrorEventArgs e)14 {15 Console.WriteLine(e.Message);16 }17 }18}

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PageErrorEventArgs

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 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions10 {11 });12 var page = await browser.NewPageAsync();13 page.PageError += Page_PageError;14 await page.ScreenshotAsync("1.png");15 await browser.CloseAsync();16 }17 private static void Page_PageError(object sender, PageErrorEventArgs e)18 {19 Console.WriteLine(e.Message);20 }21 }22}23using PuppeteerSharp;24using System;25using System.Threading.Tasks;26{27 {28 static async Task Main(string[] args)29 {30 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);31 var browser = await Puppeteer.LaunchAsync(new LaunchOptions32 {33 });34 var page = await browser.NewPageAsync();35 page.PageError += Page_PageError;36 await page.ScreenshotAsync("1.png");37 await browser.CloseAsync();38 }39 private static void Page_PageError(object sender, PageErrorEventArgs e)40 {41 Console.WriteLine(e.Message);42 }43 }44}45using PuppeteerSharp;46using System;

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PageErrorEventArgs

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1var browser = await Puppeteer.LaunchAsync(new LaunchOptions2{3 Args = new[] { "--no-sandbox" }4});5var page = await browser.NewPageAsync();6await page.SetRequestInterceptionAsync(true);7page.Request += async (sender, e) =>8{9 await e.Request.ContinueAsync();10};11page.PageError += (sender, e) =>12{13 Console.WriteLine(e.Message);14};15await page.ScreenshotAsync("google.png");16await browser.CloseAsync();17var browser = await Puppeteer.LaunchAsync(new LaunchOptions18{19 Args = new[] { "--no-sandbox" }20});21var page = await browser.NewPageAsync();22await page.SetRequestInterceptionAsync(true);23page.Request += async (sender, e) =>24{25 await e.Request.ContinueAsync();26};27page.PageError += (sender, e) =>28{29 Console.WriteLine(e.Message);30};31await page.ScreenshotAsync("google.png");32await browser.CloseAsync();33var browser = await Puppeteer.LaunchAsync(new LaunchOptions34{35 Args = new[] { "--no-sandbox" }36});37var page = await browser.NewPageAsync();38await page.SetRequestInterceptionAsync(true);39page.Request += async (sender, e) =>40{41 await e.Request.ContinueAsync();42};43page.PageError += (sender, e) =>44{45 Console.WriteLine(e.Message);46};

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PageErrorEventArgs

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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 page.PageError += Page_PageError;13 await page.EvaluateExpressionAsync("notExistingFunction()");14 }15 private static void Page_PageError(object sender, PageErrorEventArgs e)16 {17 Console.WriteLine("Page error: " + e.Message);18 }19 }20}21PuppeteerSharp - Wait for Navigation using WaitUntilNavigationAsync()

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PageErrorEventArgs

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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 page.PageError += Page_PageError;13 await Task.Delay(30000);14 await browser.CloseAsync();15 }16 private static void Page_PageError(object sender, PageErrorEventArgs e)17 {18 Console.WriteLine(e.Message);19 }20 }21}

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PageErrorEventArgs

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions10 {11 });12 var page = await browser.NewPageAsync();13 page.PageError += Page_PageError;14 await page.EvaluateExpressionAsync("not_existing_function()");15 await browser.CloseAsync();16 }17 private static void Page_PageError(object sender, PageErrorEventArgs e)18 {19 Console.WriteLine(e.Message);20 }21 }22}23 at ExecutionContext._evaluateInternal (/Users/kblok/code/puppeteer-sharp/lib/ExecutionContext.js:122:13)24 at process._tickCallback (internal/process/next_tick.js:68:7)

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