How to use MetricEventArgs class of PuppeteerSharp package

Best Puppeteer-sharp code snippet using PuppeteerSharp.MetricEventArgs

Page.cs

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...83 public event EventHandler<ErrorEventArgs> Error;84 /// <summary>85 /// Raised when the JavaScript code makes a call to <c>console.timeStamp</c>. For the list of metrics see <see cref="Page.MetricsAsync"/>.86 /// </summary>87 public event EventHandler<MetricEventArgs> Metrics;88 /// <summary>89 /// Raised when a JavaScript dialog appears, such as <c>alert</c>, <c>prompt</c>, <c>confirm</c> or <c>beforeunload</c>. Puppeteer can respond to the dialog via <see cref="Dialog"/>'s <see cref="Dialog.Accept(string)"/> or <see cref="Dialog.Dismiss"/> methods.90 /// </summary>91 public event EventHandler<DialogEventArgs> Dialog;92 /// <summary>93 /// Raised when JavaScript within the page calls one of console API methods, e.g. <c>console.log</c> or <c>console.dir</c>. Also emitted if the page throws an error or a warning.94 /// The arguments passed into <c>console.log</c> appear as arguments on the event handler.95 /// </summary>96 /// <example>97 /// An example of handling <see cref="Console"/> event:98 /// <code>99 /// <![CDATA[100 /// page.Console += (sender, e) => 101 /// {102 /// for (var i = 0; i < e.Message.Args.Count; ++i)103 /// {104 /// System.Console.WriteLine($"{i}: {e.Message.Args[i]}");105 /// }106 /// }107 /// ]]>108 /// </code>109 /// </example>110 public event EventHandler<ConsoleEventArgs> Console;111 /// <summary>112 /// Raised when a frame is attached.113 /// </summary>114 public event EventHandler<FrameEventArgs> FrameAttached;115 /// <summary>116 /// Raised when a frame is detached.117 /// </summary>118 public event EventHandler<FrameEventArgs> FrameDetached;119 /// <summary>120 /// Raised when a frame is navigated to a new url.121 /// </summary>122 public event EventHandler<FrameEventArgs> FrameNavigated;123 /// <summary>124 /// Raised when a <see cref="Response"/> is received.125 /// </summary>126 public event EventHandler<ResponseCreatedEventArgs> Response;127 /// <summary>128 /// Raised when a page issues a request. The <see cref="Request"/> object is read-only.129 /// In order to intercept and mutate requests, see <see cref="SetRequestInterceptionAsync(bool)"/>130 /// </summary>131 public event EventHandler<RequestEventArgs> Request;132 /// <summary>133 /// Raised when a request finishes successfully.134 /// </summary>135 public event EventHandler<RequestEventArgs> RequestFinished;136 /// <summary>137 /// Raised when a request fails, for example by timing out.138 /// </summary>139 public event EventHandler<RequestEventArgs> RequestFailed;140 /// <summary>141 /// Raised when an uncaught exception happens within the page.142 /// </summary>143 public event EventHandler<PageErrorEventArgs> PageError;144 /// <summary>145 /// This setting will change the default maximum navigation time of 30 seconds for the following methods:146 /// - <see cref="GoToAsync(string, NavigationOptions)"/>147 /// - <see cref="GoBackAsync(NavigationOptions)"/>148 /// - <see cref="GoForwardAsync(NavigationOptions)"/>149 /// - <see cref="ReloadAsync(NavigationOptions)"/>150 /// - <see cref="WaitForNavigationAsync(NavigationOptions)"/>151 /// </summary>152 public int DefaultNavigationTimeout { get; set; } = 30000;153 /// <summary>154 /// Gets page's main frame155 /// </summary>156 /// <remarks>157 /// Page is guaranteed to have a main frame which persists during navigations.158 /// </remarks>159 public Frame MainFrame => _frameManager.MainFrame;160 /// <summary>161 /// Gets all frames attached to the page.162 /// </summary>163 /// <value>An array of all frames attached to the page.</value>164 public Frame[] Frames => _frameManager.Frames.Values.ToArray();165 /// <summary>166 /// Shortcut for <c>page.MainFrame.Url</c>167 /// </summary>168 public string Url => MainFrame.Url;169 /// <summary>170 /// Gets that target this page was created from.171 /// </summary>172 public Target Target { get; }173 /// <summary>174 /// Gets this page's keyboard175 /// </summary>176 public Keyboard Keyboard { get; }177 /// <summary>178 /// Gets this page's touchscreen179 /// </summary>180 public Touchscreen Touchscreen { get; }181 /// <summary>182 /// Gets this page's coverage183 /// </summary>184 public Coverage Coverage { get; }185 /// <summary>186 /// Gets this page's tracing187 /// </summary>188 public Tracing Tracing { get; }189 /// <summary>190 /// Gets this page's mouse191 /// </summary>192 public Mouse Mouse { get; }193 /// <summary>194 /// Gets this page's viewport195 /// </summary>196 public ViewPortOptions Viewport { get; private set; }197 /// <summary>198 /// List of suported metrics provided by the <see cref="Metrics"/> event.199 /// </summary>200 public static readonly IEnumerable<string> SupportedMetrics = new List<string>201 {202 "Timestamp",203 "Documents",204 "Frames",205 "JSEventListeners",206 "Nodes",207 "LayoutCount",208 "RecalcStyleCount",209 "LayoutDuration",210 "RecalcStyleDuration",211 "ScriptDuration",212 "TaskDuration",213 "JSHeapUsedSize",214 "JSHeapTotalSize"215 };216 #endregion217 #region Public Methods218 /// <summary>219 /// Returns metrics220 /// </summary>221 /// <returns>Task which resolves into a list of metrics</returns>222 /// <remarks>223 /// All timestamps are in monotonic time: monotonically increasing time in seconds since an arbitrary point in the past.224 /// </remarks>225 public async Task<Dictionary<string, decimal>> MetricsAsync()226 {227 var response = await Client.SendAsync<PerformanceGetMetricsResponse>("Performance.getMetrics");228 return BuildMetricsObject(response.Metrics);229 }230 /// <summary>231 /// Fetches an element with <paramref name="selector"/>, scrolls it into view if needed, and then uses <see cref="Touchscreen"/> to tap in the center of the element.232 /// </summary>233 /// <param name="selector">A selector to search for element to tap. If there are multiple elements satisfying the selector, the first will be clicked.</param>234 /// <exception cref="SelectorException">If there's no element matching <paramref name="selector"/></exception>235 /// <returns>Task which resolves when the element matching <paramref name="selector"/> is successfully tapped</returns>236 public async Task TapAsync(string selector)237 {238 var handle = await QuerySelectorAsync(selector);239 if (handle == null)240 {241 throw new SelectorException($"No node found for selector: {selector}", selector);242 }243 await handle.TapAsync();244 await handle.DisposeAsync();245 }246 /// <summary>247 /// The method runs <c>document.querySelector</c> within the page. If no element matches the selector, the return value resolve to <c>null</c>.248 /// </summary>249 /// <param name="selector">A selector to query page for</param>250 /// <returns>Task which resolves to <see cref="ElementHandle"/> pointing to the frame element</returns>251 /// <remarks>252 /// Shortcut for <c>page.MainFrame.QuerySelectorAsync(selector)</c>253 /// </remarks>254 /// <seealso cref="Frame.QuerySelectorAsync(string)"/>255 public Task<ElementHandle> QuerySelectorAsync(string selector)256 => MainFrame.QuerySelectorAsync(selector);257 /// <summary>258 /// Runs <c>document.querySelectorAll</c> within the page. If no elements match the selector, the return value resolve to <see cref="Array.Empty{T}"/>.259 /// </summary>260 /// <param name="selector">A selector to query page for</param>261 /// <returns>Task which resolves to ElementHandles pointing to the frame elements</returns>262 /// <seealso cref="Frame.QuerySelectorAllAsync(string)"/>263 public Task<ElementHandle[]> QuerySelectorAllAsync(string selector)264 => MainFrame.QuerySelectorAllAsync(selector);265 /// <summary>266 /// A utility function to be used with <see cref="Extensions.EvaluateFunctionAsync{T}(Task{JSHandle}, string, object[])"/>267 /// </summary>268 /// <param name="selector">A selector to query page for</param>269 /// <returns>Task which resolves to a <see cref="JSHandle"/> of <c>document.querySelectorAll</c> result</returns>270 public Task<JSHandle> QuerySelectorAllHandleAsync(string selector)271 => EvaluateFunctionHandleAsync("selector => Array.from(document.querySelectorAll(selector))", selector);272 /// <summary>273 /// Evaluates the XPath expression274 /// </summary>275 /// <param name="expression">Expression to evaluate <see href="https://developer.mozilla.org/en-US/docs/Web/API/Document/evaluate"/></param>276 /// <returns>Task which resolves to an array of <see cref="ElementHandle"/></returns>277 /// <remarks>278 /// Shortcut for <c>page.MainFrame.XPathAsync(expression)</c>279 /// </remarks>280 /// <seealso cref="Frame.XPathAsync(string)"/>281 public Task<ElementHandle[]> XPathAsync(string expression) => MainFrame.XPathAsync(expression);282 /// <summary>283 /// Executes a script in browser context284 /// </summary>285 /// <param name="script">Script to be evaluated in browser context</param>286 /// <remarks>287 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.288 /// </remarks>289 /// <returns>Task which resolves to script return value</returns>290 public async Task<JSHandle> EvaluateExpressionHandleAsync(string script)291 {292 var context = await MainFrame.GetExecutionContextAsync();293 return await context.EvaluateExpressionHandleAsync(script);294 }295 /// <summary>296 /// Executes a script in browser context297 /// </summary>298 /// <param name="pageFunction">Script to be evaluated in browser context</param>299 /// <param name="args">Function arguments</param>300 /// <remarks>301 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.302 /// <see cref="JSHandle"/> instances can be passed as arguments303 /// </remarks>304 /// <returns>Task which resolves to script return value</returns>305 public async Task<JSHandle> EvaluateFunctionHandleAsync(string pageFunction, params object[] args)306 {307 var context = await MainFrame.GetExecutionContextAsync();308 return await context.EvaluateFunctionHandleAsync(pageFunction, args);309 }310 /// <summary>311 /// Adds a function which would be invoked in one of the following scenarios:312 /// - whenever the page is navigated313 /// - whenever the child frame is attached or navigated. In this case, the function is invoked in the context of the newly attached frame314 /// </summary>315 /// <param name="pageFunction">Function to be evaluated in browser context</param>316 /// <param name="args">Arguments to pass to <c>pageFunction</c></param>317 /// <remarks>318 /// The function is invoked after the document was created but before any of its scripts were run. This is useful to amend JavaScript environment, e.g. to seed <c>Math.random</c>.319 /// </remarks>320 /// <example>321 /// An example of overriding the navigator.languages property before the page loads:322 /// <code>323 /// var overrideNavigatorLanguages = @"Object.defineProperty(navigator, 'languages', {324 /// get: function() {325 /// return ['en-US', 'en', 'bn'];326 /// };327 /// });";328 /// await page.EvaluateOnNewDocumentAsync(overrideNavigatorLanguages);329 /// </code>330 /// </example>331 /// <returns>Task</returns>332 public Task EvaluateOnNewDocumentAsync(string pageFunction, params object[] args)333 {334 var source = EvaluationString(pageFunction, args);335 return Client.SendAsync("Page.addScriptToEvaluateOnNewDocument", new { source });336 }337 /// <summary>338 /// The method iterates JavaScript heap and finds all the objects with the given prototype.339 /// Shortcut for <c>page.MainFrame.GetExecutionContextAsync().QueryObjectsAsync(prototypeHandle)</c>.340 /// </summary>341 /// <returns>A task which resolves to a handle to an array of objects with this prototype.</returns>342 /// <param name="prototypeHandle">A handle to the object prototype.</param>343 public async Task<JSHandle> QueryObjectsAsync(JSHandle prototypeHandle)344 {345 var context = await MainFrame.GetExecutionContextAsync();346 return await context.QueryObjectsAsync(prototypeHandle);347 }348 /// <summary>349 /// Activating request interception enables <see cref="Request.AbortAsync(RequestAbortErrorCode)">request.AbortAsync</see>, 350 /// <see cref="Request.ContinueAsync(Payload)">request.ContinueAsync</see> and <see cref="Request.RespondAsync(ResponseData)">request.RespondAsync</see> methods.351 /// </summary>352 /// <returns>The request interception task.</returns>353 /// <param name="value">Whether to enable request interception..</param>354 public Task SetRequestInterceptionAsync(bool value)355 => _networkManager.SetRequestInterceptionAsync(value);356 /// <summary>357 /// Set offline mode for the page.358 /// </summary>359 /// <returns>Result task</returns>360 /// <param name="value">When <c>true</c> enables offline mode for the page.</param>361 public Task SetOfflineModeAsync(bool value) => _networkManager.SetOfflineModeAsync(value);362 /// <summary>363 /// Returns the page's cookies364 /// </summary>365 /// <param name="urls">Url's to return cookies for</param>366 /// <returns>Array of cookies</returns>367 /// <remarks>368 /// If no URLs are specified, this method returns cookies for the current page URL.369 /// If URLs are specified, only cookies for those URLs are returned.370 /// </remarks>371 public async Task<CookieParam[]> GetCookiesAsync(params string[] urls)372 {373 var response = await Client.SendAsync("Network.getCookies", new Dictionary<string, object>374 {375 { "urls", urls.Length > 0 ? urls : new string[] { Url } }376 });377 return response.cookies.ToObject<CookieParam[]>();378 }379 /// <summary>380 /// Clears all of the current cookies and then sets the cookies for the page381 /// </summary>382 /// <param name="cookies">Cookies to set</param>383 /// <returns>Task</returns>384 public async Task SetCookieAsync(params CookieParam[] cookies)385 {386 foreach (var cookie in cookies)387 {388 if (string.IsNullOrEmpty(cookie.Url) && Url.StartsWith("http", StringComparison.Ordinal))389 {390 cookie.Url = Url;391 }392 if (cookie.Url == "about:blank")393 {394 throw new PuppeteerException($"Blank page can not have cookie \"{cookie.Name}\"");395 }396 }397 await DeleteCookieAsync(cookies);398 if (cookies.Length > 0)399 {400 await Client.SendAsync("Network.setCookies", new Dictionary<string, object>401 {402 { "cookies", cookies}403 });404 }405 }406 /// <summary>407 /// Deletes cookies from the page408 /// </summary>409 /// <param name="cookies">Cookies to delete</param>410 /// <returns>Task</returns>411 public async Task DeleteCookieAsync(params CookieParam[] cookies)412 {413 var pageURL = Url;414 foreach (var cookie in cookies)415 {416 if (string.IsNullOrEmpty(cookie.Url) && pageURL.StartsWith("http", StringComparison.Ordinal))417 {418 cookie.Url = pageURL;419 }420 await Client.SendAsync("Network.deleteCookies", cookie);421 }422 }423 /// <summary>424 /// Adds a <c><![CDATA[<script>]]></c> tag into the page with the desired url or content425 /// </summary>426 /// <param name="options">add script tag options</param>427 /// <remarks>428 /// Shortcut for <c>page.MainFrame.AddScriptTagAsync(options)</c>429 /// </remarks>430 /// <returns>Task which resolves to the added tag when the script's onload fires or when the script content was injected into frame</returns>431 /// <seealso cref="Frame.AddScriptTag(AddTagOptions)"/>432 public Task<ElementHandle> AddScriptTagAsync(AddTagOptions options) => MainFrame.AddScriptTag(options);433 /// <summary>434 /// Adds a <c><![CDATA[<script>]]></c> tag into the page with the desired url or content435 /// </summary>436 /// <param name="url">script url</param>437 /// <remarks>438 /// Shortcut for <c>page.MainFrame.AddScriptTagAsync(new AddTagOptions { Url = url })</c>439 /// </remarks>440 /// <returns>Task which resolves to the added tag when the script's onload fires or when the script content was injected into frame</returns>441 public Task<ElementHandle> AddScriptTagAsync(string url) => AddScriptTagAsync(new AddTagOptions { Url = url });442 /// <summary>443 /// 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 content444 /// </summary>445 /// <param name="options">add style tag options</param>446 /// <remarks>447 /// Shortcut for <c>page.MainFrame.AddStyleTagAsync(options)</c>448 /// </remarks>449 /// <returns>Task which resolves to the added tag when the stylesheet's onload fires or when the CSS content was injected into frame</returns>450 /// <seealso cref="Frame.AddStyleTag(AddTagOptions)"/>451 public Task<ElementHandle> AddStyleTagAsync(AddTagOptions options) => MainFrame.AddStyleTag(options);452 /// <summary>453 /// 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 content454 /// </summary>455 /// <param name="url">stylesheel url</param>456 /// <remarks>457 /// Shortcut for <c>page.MainFrame.AddStyleTagAsync(new AddTagOptions { Url = url })</c>458 /// </remarks>459 /// <returns>Task which resolves to the added tag when the stylesheet's onload fires or when the CSS content was injected into frame</returns>460 public Task<ElementHandle> AddStyleTagAsync(string url) => AddStyleTagAsync(new AddTagOptions { Url = url });461 /// <summary>462 /// Adds a function called <c>name</c> on the page's <c>window</c> object.463 /// When called, the function executes <paramref name="puppeteerFunction"/> in C# and returns a <see cref="Task"/> which resolves when <paramref name="puppeteerFunction"/> completes.464 /// </summary>465 /// <param name="name">Name of the function on the window object</param>466 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>467 /// <remarks>468 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.469 /// Functions installed via <see cref="ExposeFunctionAsync(string, Action)"/> survive navigations470 /// </remarks>471 /// <returns>Task</returns>472 public Task ExposeFunctionAsync(string name, Action puppeteerFunction)473 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);474 /// <summary>475 /// Adds a function called <c>name</c> on the page's <c>window</c> object.476 /// 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"/>.477 /// </summary>478 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>479 /// <param name="name">Name of the function on the window object</param>480 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>481 /// <remarks>482 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.483 /// Functions installed via <see cref="ExposeFunctionAsync{TResult}(string, Func{TResult})"/> survive navigations484 /// </remarks>485 /// <returns>Task</returns>486 public Task ExposeFunctionAsync<TResult>(string name, Func<TResult> puppeteerFunction)487 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);488 /// <summary>489 /// Adds a function called <c>name</c> on the page's <c>window</c> object.490 /// 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"/>.491 /// </summary>492 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>493 /// <typeparam name="T">The parameter of <paramref name="puppeteerFunction"/></typeparam>494 /// <param name="name">Name of the function on the window object</param>495 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>496 /// <remarks>497 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.498 /// Functions installed via <see cref="ExposeFunctionAsync{T, TResult}(string, Func{T, TResult})"/> survive navigations499 /// </remarks>500 /// <returns>Task</returns>501 public Task ExposeFunctionAsync<T, TResult>(string name, Func<T, TResult> puppeteerFunction)502 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);503 /// <summary>504 /// Adds a function called <c>name</c> on the page's <c>window</c> object.505 /// 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"/>.506 /// </summary>507 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>508 /// <typeparam name="T1">The first parameter of <paramref name="puppeteerFunction"/></typeparam>509 /// <typeparam name="T2">The second parameter of <paramref name="puppeteerFunction"/></typeparam>510 /// <param name="name">Name of the function on the window object</param>511 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>512 /// <remarks>513 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.514 /// Functions installed via <see cref="ExposeFunctionAsync{T1, T2, TResult}(string, Func{T1, T2, TResult})"/> survive navigations515 /// </remarks>516 /// <returns>Task</returns>517 public Task ExposeFunctionAsync<T1, T2, TResult>(string name, Func<T1, T2, TResult> puppeteerFunction)518 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);519 /// <summary>520 /// Adds a function called <c>name</c> on the page's <c>window</c> object.521 /// 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"/>.522 /// </summary>523 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>524 /// <typeparam name="T1">The first parameter of <paramref name="puppeteerFunction"/></typeparam>525 /// <typeparam name="T2">The second parameter of <paramref name="puppeteerFunction"/></typeparam>526 /// <typeparam name="T3">The third parameter of <paramref name="puppeteerFunction"/></typeparam>527 /// <param name="name">Name of the function on the window object</param>528 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>529 /// <remarks>530 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.531 /// Functions installed via <see cref="ExposeFunctionAsync{T1, T2, T3, TResult}(string, Func{TResult})"/> survive navigations532 /// </remarks>533 /// <returns>Task</returns>534 public Task ExposeFunctionAsync<T1, T2, T3, TResult>(string name, Func<TResult> puppeteerFunction)535 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);536 /// <summary>537 /// Adds a function called <c>name</c> on the page's <c>window</c> object.538 /// 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"/>.539 /// </summary>540 /// <typeparam name="TResult">The result of <paramref name="puppeteerFunction"/></typeparam>541 /// <typeparam name="T1">The first parameter of <paramref name="puppeteerFunction"/></typeparam>542 /// <typeparam name="T2">The second parameter of <paramref name="puppeteerFunction"/></typeparam>543 /// <typeparam name="T3">The third parameter of <paramref name="puppeteerFunction"/></typeparam>544 /// <typeparam name="T4">The fourth parameter of <paramref name="puppeteerFunction"/></typeparam>545 /// <param name="name">Name of the function on the window object</param>546 /// <param name="puppeteerFunction">Callback function which will be called in Puppeteer's context.</param>547 /// <remarks>548 /// If the <paramref name="puppeteerFunction"/> returns a <see cref="Task"/>, it will be awaited.549 /// Functions installed via <see cref="ExposeFunctionAsync{T1, T2, T3, T4, TResult}(string, Func{T1, T2, T3, T4, TResult})"/> survive navigations550 /// </remarks>551 /// <returns>Task</returns>552 public Task ExposeFunctionAsync<T1, T2, T3, T4, TResult>(string name, Func<T1, T2, T3, T4, TResult> puppeteerFunction)553 => ExposeFunctionAsync(name, (Delegate)puppeteerFunction);554 /// <summary>555 /// Gets the full HTML contents of the page, including the doctype.556 /// </summary>557 /// <returns>Task which resolves to the HTML content.</returns>558 /// <seealso cref="Frame.GetContentAsync"/>559 public Task<string> GetContentAsync() => _frameManager.MainFrame.GetContentAsync();560 /// <summary>561 /// Sets the HTML markup to the page562 /// </summary>563 /// <param name="html">HTML markup to assign to the page.</param>564 /// <returns>Task.</returns>565 /// <seealso cref="Frame.SetContentAsync(string)"/>566 public Task SetContentAsync(string html) => _frameManager.MainFrame.SetContentAsync(html);567 /// <summary>568 /// Navigates to an url569 /// </summary>570 /// <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>571 /// <param name="url">URL to navigate page to. The url should include scheme, e.g. https://.</param>572 /// <param name="options">Navigation parameters.</param>573 public async Task<Response> GoToAsync(string url, NavigationOptions options = null)574 {575 var referrer = _networkManager.ExtraHTTPHeaders?.GetValueOrDefault("referer");576 var requests = new Dictionary<string, Request>();577 EventHandler<RequestEventArgs> createRequestEventListener = (object sender, RequestEventArgs e) =>578 {579 if (!requests.ContainsKey(e.Request.Url))580 {581 requests.Add(e.Request.Url, e.Request);582 }583 };584 _networkManager.Request += createRequestEventListener;585 var mainFrame = _frameManager.MainFrame;586 var timeout = options?.Timeout ?? DefaultNavigationTimeout;587 var watcher = new NavigatorWatcher(_frameManager, mainFrame, timeout, options);588 var navigateTask = Navigate(Client, url, referrer);589 await Task.WhenAny(590 watcher.NavigationTask,591 navigateTask);592 AggregateException exception = null;593 if (navigateTask.IsFaulted)594 {595 exception = navigateTask.Exception;596 }597 else if (watcher.NavigationTask.IsCompleted &&598 watcher.NavigationTask.Result.IsFaulted)599 {600 exception = watcher.NavigationTask.Result?.Exception;601 }602 if (exception == null)603 {604 await Task.WhenAll(605 watcher.NavigationTask,606 navigateTask);607 exception = navigateTask.Exception ?? watcher.NavigationTask.Result.Exception;608 }609 watcher.Cancel();610 _networkManager.Request -= createRequestEventListener;611 if (exception != null)612 {613 throw new NavigationException(exception.InnerException.Message, exception.InnerException);614 }615 requests.TryGetValue(MainFrame.Url, out var request);616 return request?.Response;617 }618 /// <summary>619 /// 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"/>620 /// </summary>621 /// <param name="file">The file path to save the PDF to. paths are resolved using <see cref="Path.GetFullPath(string)"/></param>622 /// <returns></returns>623 /// <remarks>624 /// Generating a pdf is currently only supported in Chrome headless625 /// </remarks>626 public Task PdfAsync(string file) => PdfAsync(file, new PdfOptions());627 /// <summary>628 /// 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"/>629 /// </summary>630 /// <param name="file">The file path to save the PDF to. paths are resolved using <see cref="Path.GetFullPath(string)"/></param>631 /// <param name="options">pdf options</param>632 /// <returns></returns>633 /// <remarks>634 /// Generating a pdf is currently only supported in Chrome headless635 /// </remarks>636 public async Task PdfAsync(string file, PdfOptions options)637 {638 var data = await PdfDataAsync(options);639 using (var fs = File.OpenWrite(file))640 {641 await fs.WriteAsync(data, 0, data.Length);642 }643 }644 /// <summary>645 /// 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"/>646 /// </summary>647 /// <returns>Task which resolves to a <see cref="Stream"/> containing the PDF data.</returns>648 /// <remarks>649 /// Generating a pdf is currently only supported in Chrome headless650 /// </remarks>651 public Task<Stream> PdfStreamAsync() => PdfStreamAsync(new PdfOptions());652 /// <summary>653 /// 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"/>654 /// </summary>655 /// <param name="options">pdf options</param>656 /// <returns>Task which resolves to a <see cref="Stream"/> containing the PDF data.</returns>657 /// <remarks>658 /// Generating a pdf is currently only supported in Chrome headless659 /// </remarks>660 public async Task<Stream> PdfStreamAsync(PdfOptions options)661 => new MemoryStream(await PdfDataAsync(options));662 /// <summary>663 /// 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"/>664 /// </summary>665 /// <returns>Task which resolves to a <see cref="byte"/>[] containing the PDF data.</returns>666 /// <remarks>667 /// Generating a pdf is currently only supported in Chrome headless668 /// </remarks>669 public Task<byte[]> PdfDataAsync() => PdfDataAsync(new PdfOptions());670 /// <summary>671 /// 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"/>672 /// </summary>673 /// <param name="options">pdf options</param>674 /// <returns>Task which resolves to a <see cref="byte"/>[] containing the PDF data.</returns>675 /// <remarks>676 /// Generating a pdf is currently only supported in Chrome headless677 /// </remarks>678 public async Task<byte[]> PdfDataAsync(PdfOptions options)679 {680 var paperWidth = PaperFormat.Letter.Width;681 var paperHeight = PaperFormat.Letter.Height;682 if (options.Format != null)683 {684 paperWidth = options.Format.Width;685 paperHeight = options.Format.Height;686 }687 else688 {689 if (options.Width != null)690 {691 paperWidth = ConvertPrintParameterToInches(options.Width);692 }693 if (options.Height != null)694 {695 paperHeight = ConvertPrintParameterToInches(options.Height);696 }697 }698 var marginTop = ConvertPrintParameterToInches(options.MarginOptions.Top);699 var marginLeft = ConvertPrintParameterToInches(options.MarginOptions.Left);700 var marginBottom = ConvertPrintParameterToInches(options.MarginOptions.Bottom);701 var marginRight = ConvertPrintParameterToInches(options.MarginOptions.Right);702 JObject result = await Client.SendAsync("Page.printToPDF", new703 {704 landscape = options.Landscape,705 displayHeaderFooter = options.DisplayHeaderFooter,706 headerTemplate = options.HeaderTemplate,707 footerTemplate = options.FooterTemplate,708 printBackground = options.PrintBackground,709 scale = options.Scale,710 paperWidth,711 paperHeight,712 marginTop,713 marginBottom,714 marginLeft,715 marginRight,716 pageRanges = options.PageRanges717 });718 var buffer = Convert.FromBase64String(result.GetValue("data").Value<string>());719 return buffer;720 }721 /// <summary>722 /// Enables/Disables Javascript on the page723 /// </summary>724 /// <returns>Task.</returns>725 /// <param name="enabled">Whether or not to enable JavaScript on the page.</param>726 public Task SetJavaScriptEnabledAsync(bool enabled)727 => Client.SendAsync("Emulation.setScriptExecutionDisabled", new { value = !enabled });728 /// <summary>729 /// Emulates a media such as screen or print.730 /// </summary>731 /// <returns>Task.</returns>732 /// <param name="media">Media to set.</param>733 public Task EmulateMediaAsync(MediaType media)734 => Client.SendAsync("Emulation.setEmulatedMedia", new { media });735 /// <summary>736 /// Sets the viewport.737 /// In the case of multiple pages in a single browser, each page can have its own viewport size.738 /// NOTE in certain cases, setting viewport will reload the page in order to set the isMobile or hasTouch properties.739 /// </summary>740 /// <returns>The viewport task.</returns>741 /// <param name="viewport">Viewport options.</param>742 public async Task SetViewportAsync(ViewPortOptions viewport)743 {744 var needsReload = await _emulationManager.EmulateViewport(Client, viewport);745 Viewport = viewport;746 if (needsReload)747 {748 await ReloadAsync();749 }750 }751 /// <summary>752 /// Emulates given device metrics and user agent. 753 /// </summary>754 /// <remarks>755 /// This method is a shortcut for calling two methods:756 /// page.SetViewportAsync(userAgent)757 /// page.SetUserAgentAsync(viewport)758 /// </remarks>759 /// <returns>Task.</returns>760 /// <param name="options">Emulation options.</param>761 public Task EmulateAsync(DeviceDescriptor options) => Task.WhenAll(762 SetViewportAsync(options.ViewPort),763 SetUserAgentAsync(options.UserAgent)764 );765 /// <summary>766 /// Takes a screenshot of the page767 /// </summary>768 /// <returns>The screenshot task.</returns>769 /// <param name="file">The file path to save the image to. The screenshot type will be inferred from file extension. 770 /// If path is a relative path, then it is resolved relative to current working directory. If no path is provided, 771 /// the image won't be saved to the disk.</param>772 public Task ScreenshotAsync(string file) => ScreenshotAsync(file, new ScreenshotOptions());773 /// <summary>774 /// Takes a screenshot of the page775 /// </summary>776 /// <returns>The screenshot task.</returns>777 /// <param name="file">The file path to save the image to. The screenshot type will be inferred from file extension. 778 /// If path is a relative path, then it is resolved relative to current working directory. If no path is provided, 779 /// the image won't be saved to the disk.</param>780 /// <param name="options">Screenshot options.</param>781 public async Task ScreenshotAsync(string file, ScreenshotOptions options)782 {783 var fileInfo = new FileInfo(file);784 options.Type = fileInfo.Extension.Replace(".", string.Empty);785 var data = await ScreenshotDataAsync(options);786 using (var fs = new FileStream(file, FileMode.Create, FileAccess.Write))787 {788 await fs.WriteAsync(data, 0, data.Length);789 }790 }791 /// <summary>792 /// Takes a screenshot of the page793 /// </summary>794 /// <returns>Task which resolves to a <see cref="Stream"/> containing the image data.</returns>795 public Task<Stream> ScreenshotStreamAsync() => ScreenshotStreamAsync(new ScreenshotOptions());796 /// <summary>797 /// Takes a screenshot of the page798 /// </summary>799 /// <returns>Task which resolves to a <see cref="Stream"/> containing the image data.</returns>800 /// <param name="options">Screenshot options.</param>801 public async Task<Stream> ScreenshotStreamAsync(ScreenshotOptions options)802 => new MemoryStream(await ScreenshotDataAsync(options));803 /// <summary>804 /// Takes a screenshot of the page805 /// </summary>806 /// <returns>Task which resolves to a <see cref="byte"/>[] containing the image data.</returns>807 public Task<byte[]> ScreenshotDataAsync() => ScreenshotDataAsync(new ScreenshotOptions());808 /// <summary>809 /// Takes a screenshot of the page810 /// </summary>811 /// <returns>Task which resolves to a <see cref="byte"/>[] containing the image data.</returns>812 /// <param name="options">Screenshot options.</param>813 public async Task<byte[]> ScreenshotDataAsync(ScreenshotOptions options)814 {815 string screenshotType = null;816 if (!string.IsNullOrEmpty(options.Type))817 {818 if (options.Type != "png" && options.Type != "jpeg")819 {820 throw new ArgumentException($"Unknown options.type {options.Type}");821 }822 screenshotType = options.Type;823 }824 if (string.IsNullOrEmpty(screenshotType))825 {826 screenshotType = "png";827 }828 if (options.Quality.HasValue)829 {830 if (screenshotType == "jpeg")831 {832 throw new ArgumentException($"options.Quality is unsupported for the {screenshotType} screenshots");833 }834 if (options.Quality < 0 || options.Quality > 100)835 {836 throw new ArgumentException($"Expected options.quality to be between 0 and 100 (inclusive), got {options.Quality}");837 }838 }839 if (options.Clip != null && options.FullPage)840 {841 throw new ArgumentException("options.clip and options.fullPage are exclusive");842 }843 return await _screenshotTaskQueue.Enqueue(() => PerformScreenshot(screenshotType, options));844 }845 /// <summary>846 /// Returns page's title847 /// </summary>848 /// <returns>page's title</returns>849 /// <see cref="Frame.GetTitleAsync"/>850 public Task<string> GetTitleAsync() => MainFrame.GetTitleAsync();851 /// <summary>852 /// Closes the page.853 /// </summary>854 /// <returns>Task.</returns>855 public Task CloseAsync()856 {857 if (!(Client?.Connection?.IsClosed ?? true))858 {859 return Client.Connection.SendAsync("Target.closeTarget", new860 {861 targetId = Target.TargetId862 });863 }864 return Task.CompletedTask;865 }866 /// <summary>867 /// Fetches an element with <paramref name="selector"/>, scrolls it into view if needed, and then uses <see cref="Page.Mouse"/> to click in the center of the element.868 /// </summary>869 /// <param name="selector">A selector to search for element to click. If there are multiple elements satisfying the selector, the first will be clicked.</param>870 /// <param name="options">click options</param>871 /// <exception cref="SelectorException">If there's no element matching <paramref name="selector"/></exception>872 /// <returns>Task which resolves when the element matching <paramref name="selector"/> is successfully clicked</returns>873 public async Task ClickAsync(string selector, ClickOptions options = null)874 {875 var handle = await QuerySelectorAsync(selector);876 if (handle == null)877 {878 throw new SelectorException($"No node found for selector: {selector}", selector);879 }880 await handle.ClickAsync(options);881 await handle.DisposeAsync();882 }883 /// <summary>884 /// Fetches an element with <paramref name="selector"/>, scrolls it into view if needed, and then uses <see cref="Page.Mouse"/> to hover over the center of the element.885 /// </summary>886 /// <param name="selector">A selector to search for element to hover. If there are multiple elements satisfying the selector, the first will be hovered.</param>887 /// <exception cref="SelectorException">If there's no element matching <paramref name="selector"/></exception>888 /// <returns>Task which resolves when the element matching <paramref name="selector"/> is successfully hovered</returns>889 public async Task HoverAsync(string selector)890 {891 var handle = await QuerySelectorAsync(selector);892 if (handle == null)893 {894 throw new SelectorException($"No node found for selector: {selector}", selector);895 }896 await handle.HoverAsync();897 await handle.DisposeAsync();898 }899 /// <summary>900 /// Fetches an element with <paramref name="selector"/> and focuses it901 /// </summary>902 /// <param name="selector">A selector to search for element to focus. If there are multiple elements satisfying the selector, the first will be focused.</param>903 /// <exception cref="SelectorException">If there's no element matching <paramref name="selector"/></exception>904 /// <returns>Task which resolves when the element matching <paramref name="selector"/> is successfully focused</returns>905 public async Task FocusAsync(string selector)906 {907 var handle = await QuerySelectorAsync(selector);908 if (handle == null)909 {910 throw new SelectorException($"No node found for selector: {selector}", selector);911 }912 await handle.FocusAsync();913 await handle.DisposeAsync();914 }915 /// <summary>916 /// Executes a script in browser context917 /// </summary>918 /// <param name="script">Script to be evaluated in browser context</param>919 /// <remarks>920 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.921 /// </remarks>922 /// <seealso cref="EvaluateFunctionAsync(string, object[])"/>923 /// <returns>Task which resolves to script return value</returns>924 public Task<dynamic> EvaluateExpressionAsync(string script)925 => _frameManager.MainFrame.EvaluateExpressionAsync(script);926 /// <summary>927 /// Executes a script in browser context928 /// </summary>929 /// <typeparam name="T">The type to deserialize the result to</typeparam>930 /// <param name="script">Script to be evaluated in browser context</param>931 /// <remarks>932 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.933 /// </remarks>934 /// <seealso cref="EvaluateFunctionAsync{T}(string, object[])"/>935 /// <returns>Task which resolves to script return value</returns>936 public Task<T> EvaluateExpressionAsync<T>(string script)937 => _frameManager.MainFrame.EvaluateExpressionAsync<T>(script);938 /// <summary>939 /// Executes a function in browser context940 /// </summary>941 /// <param name="script">Script to be evaluated in browser context</param>942 /// <param name="args">Arguments to pass to script</param>943 /// <remarks>944 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.945 /// <see cref="JSHandle"/> instances can be passed as arguments946 /// </remarks>947 /// <seealso cref="EvaluateExpressionAsync(string)"/>948 /// <returns>Task which resolves to script return value</returns>949 public Task<dynamic> EvaluateFunctionAsync(string script, params object[] args)950 => _frameManager.MainFrame.EvaluateFunctionAsync(script, args);951 /// <summary>952 /// Executes a function in browser context953 /// </summary>954 /// <typeparam name="T">The type to deserialize the result to</typeparam>955 /// <param name="script">Script to be evaluated in browser context</param>956 /// <param name="args">Arguments to pass to script</param>957 /// <remarks>958 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.959 /// <see cref="JSHandle"/> instances can be passed as arguments960 /// </remarks>961 /// <seealso cref="EvaluateExpressionAsync{T}(string)"/>962 /// <returns>Task which resolves to script return value</returns>963 public Task<T> EvaluateFunctionAsync<T>(string script, params object[] args)964 => _frameManager.MainFrame.EvaluateFunctionAsync<T>(script, args);965 /// <summary>966 /// Sets the user agent to be used in this page967 /// </summary>968 /// <param name="userAgent">Specific user agent to use in this page</param>969 /// <returns>Task</returns>970 public Task SetUserAgentAsync(string userAgent)971 => _networkManager.SetUserAgentAsync(userAgent);972 /// <summary>973 /// Sets extra HTTP headers that will be sent with every request the page initiates974 /// </summary>975 /// <param name="headers">Additional http headers to be sent with every request</param>976 /// <returns>Task</returns>977 public Task SetExtraHttpHeadersAsync(Dictionary<string, string> headers)978 => _networkManager.SetExtraHTTPHeadersAsync(headers);979 /// <summary>980 /// Provide credentials for http authentication <see href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Authentication"/>981 /// </summary>982 /// <param name="credentials">The credentials</param>983 /// <returns></returns>984 /// <remarks>985 /// To disable authentication, pass <c>null</c>986 /// </remarks>987 public Task AuthenticateAsync(Credentials credentials) => _networkManager.AuthenticateAsync(credentials);988 /// <summary>989 /// Reloads the page990 /// </summary>991 /// <param name="options">Navigation options</param>992 /// <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>993 public async Task<Response> ReloadAsync(NavigationOptions options = null)994 {995 var navigationTask = WaitForNavigationAsync(options);996 await Task.WhenAll(997 navigationTask,998 Client.SendAsync("Page.reload")999 );1000 return navigationTask.Result;1001 }1002 /// <summary>1003 /// Triggers a change and input event once all the provided options have been selected. 1004 /// If there's no <![CDATA[<select>]]> element matching selector, the method throws an error.1005 /// </summary>1006 /// <exception cref="SelectorException">If there's no element matching <paramref name="selector"/></exception>1007 /// <param name="selector">A selector to query page for</param>1008 /// <param name="values">Values of options to select. If the <![CDATA[<select>]]> has the multiple attribute, 1009 /// all values are considered, otherwise only the first one is taken into account.</param>1010 /// <returns>Returns an array of option values that have been successfully selected.</returns>1011 /// <seealso cref="Frame.SelectAsync(string, string[])"/>1012 public Task<string[]> SelectAsync(string selector, params string[] values)1013 => MainFrame.SelectAsync(selector, values);1014 /// <summary>1015 /// Sends a <c>keydown</c>, <c>keypress</c>/<c>input</c>, and <c>keyup</c> event for each character in the text.1016 /// </summary>1017 /// <param name="selector">A selector of an element to type into. If there are multiple elements satisfying the selector, the first will be used.</param>1018 /// <param name="text">A text to type into a focused element</param>1019 /// <param name="options"></param>1020 /// <exception cref="SelectorException">If there's no element matching <paramref name="selector"/></exception>1021 /// <remarks>1022 /// To press a special key, like <c>Control</c> or <c>ArrowDown</c> use <see cref="Keyboard.PressAsync(string, PressOptions)"/>1023 /// </remarks>1024 /// <example>1025 /// <code>1026 /// page.TypeAsync("#mytextarea", "Hello"); // Types instantly1027 /// page.TypeAsync("#mytextarea", "World", new TypeOptions { Delay = 100 }); // Types slower, like a user1028 /// </code>1029 /// </example>1030 /// <returns>Task</returns>1031 public async Task TypeAsync(string selector, string text, TypeOptions options = null)1032 {1033 var handle = await QuerySelectorAsync(selector);1034 if (handle == null)1035 {1036 throw new SelectorException($"No node found for selector: {selector}", selector);1037 }1038 await handle.TypeAsync(text, options);1039 await handle.DisposeAsync();1040 }1041 /// <summary>1042 /// Waits for a timeout1043 /// </summary>1044 /// <param name="milliseconds"></param>1045 /// <returns>A task that resolves when after the timeout</returns>1046 /// <seealso cref="Frame.WaitForTimeoutAsync(int)"/>1047 public Task WaitForTimeoutAsync(int milliseconds)1048 => MainFrame.WaitForTimeoutAsync(milliseconds);1049 /// <summary>1050 /// Waits for a script to be evaluated to a truthy value1051 /// </summary>1052 /// <param name="script">Function to be evaluated in browser context</param>1053 /// <param name="options">Optional waiting parameters</param>1054 /// <param name="args">Arguments to pass to <c>script</c></param>1055 /// <returns>A task that resolves when the <c>script</c> returns a truthy value</returns>1056 /// <seealso cref="Frame.WaitForFunctionAsync(string, WaitForFunctionOptions, object[])"/>1057 public Task<JSHandle> WaitForFunctionAsync(string script, WaitForFunctionOptions options = null, params object[] args)1058 => MainFrame.WaitForFunctionAsync(script, options ?? new WaitForFunctionOptions(), args);1059 /// <summary>1060 /// Waits for a script to be evaluated to a truthy value1061 /// </summary>1062 /// <param name="script">Function to be evaluated in browser context</param>1063 /// <param name="args">Arguments to pass to <c>script</c></param>1064 /// <returns>A task that resolves when the <c>script</c> returns a truthy value</returns>1065 public Task<JSHandle> WaitForFunctionAsync(string script, params object[] args) => WaitForFunctionAsync(script, null, args);1066 /// <summary>1067 /// Waits for a selector to be added to the DOM1068 /// </summary>1069 /// <param name="selector">A selector of an element to wait for</param>1070 /// <param name="options">Optional waiting parameters</param>1071 /// <returns>A task that resolves when element specified by selector string is added to DOM</returns>1072 public Task<ElementHandle> WaitForSelectorAsync(string selector, WaitForSelectorOptions options = null)1073 => MainFrame.WaitForSelectorAsync(selector, options ?? new WaitForSelectorOptions());1074 /// <summary>1075 /// Waits for navigation1076 /// </summary>1077 /// <param name="options">navigation options</param>1078 /// <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>1079 public async Task<Response> WaitForNavigationAsync(NavigationOptions options = null)1080 {1081 var mainFrame = _frameManager.MainFrame;1082 var timeout = options?.Timeout ?? DefaultNavigationTimeout;1083 var watcher = new NavigatorWatcher(_frameManager, mainFrame, timeout, options);1084 var responses = new Dictionary<string, Response>();1085 EventHandler<ResponseCreatedEventArgs> createResponseEventListener = (object sender, ResponseCreatedEventArgs e) =>1086 responses.Add(e.Response.Url, e.Response);1087 _networkManager.Response += createResponseEventListener;1088 await watcher.NavigationTask;1089 _networkManager.Response -= createResponseEventListener;1090 var exception = watcher.NavigationTask.Exception;1091 if (exception != null)1092 {1093 throw new NavigationException(exception.Message, exception);1094 }1095 return responses.GetValueOrDefault(_frameManager.MainFrame.Url);1096 }1097 /// <summary>1098 /// Navigate to the previous page in history.1099 /// </summary>1100 /// <returns>Task which which resolves to the main resource response. In case of multiple redirects, 1101 /// the navigation will resolve with the response of the last redirect. If can not go back, resolves to null.</returns>1102 /// <param name="options">Navigation parameters.</param>1103 public Task<Response> GoBackAsync(NavigationOptions options = null) => GoAsync(-1, null);1104 /// <summary>1105 /// Navigate to the next page in history.1106 /// </summary>1107 /// <returns>Task which which resolves to the main resource response. In case of multiple redirects, 1108 /// the navigation will resolve with the response of the last redirect. If can not go forward, resolves to null.</returns>1109 /// <param name="options">Navigation parameters.</param>1110 public Task<Response> GoForwardAsync(NavigationOptions options = null) => GoAsync(1, null);1111 #endregion1112 #region Private Method1113 internal static async Task<Page> CreateAsync(CDPSession client, Target target, bool ignoreHTTPSErrors, bool appMode,1114 TaskQueue screenshotTaskQueue)1115 {1116 await client.SendAsync("Page.enable", null);1117 dynamic result = await client.SendAsync("Page.getFrameTree");1118 var page = new Page(client, target, new FrameTree(result.frameTree), ignoreHTTPSErrors, screenshotTaskQueue);1119 await Task.WhenAll(1120 client.SendAsync("Page.setLifecycleEventsEnabled", new Dictionary<string, object>1121 {1122 {"enabled", true }1123 }),1124 client.SendAsync("Network.enable", null),1125 client.SendAsync("Runtime.enable", null),1126 client.SendAsync("Security.enable", null),1127 client.SendAsync("Performance.enable", null)1128 );1129 if (ignoreHTTPSErrors)1130 {1131 await client.SendAsync("Security.setOverrideCertificateErrors", new Dictionary<string, object>1132 {1133 {"override", true}1134 });1135 }1136 // Initialize default page size.1137 if (!appMode)1138 {1139 await page.SetViewportAsync(new ViewPortOptions1140 {1141 Width = 800,1142 Height = 6001143 });1144 }1145 return page;1146 }1147 private async Task<Response> GoAsync(int delta, NavigationOptions options)1148 {1149 var history = await Client.SendAsync<PageGetNavigationHistoryResponse>("Page.getNavigationHistory");1150 if (history.Entries.Count <= history.CurrentIndex + delta)1151 {1152 return null;1153 }1154 var entry = history.Entries[history.CurrentIndex + delta];1155 var waitTask = WaitForNavigationAsync(options);1156 await Task.WhenAll(1157 waitTask,1158 Client.SendAsync("Page.navigateToHistoryEntry", new1159 {1160 entryId = entry.Id1161 })1162 );1163 return waitTask.Result;1164 }1165 private Dictionary<string, decimal> BuildMetricsObject(List<Metric> metrics)1166 {1167 var result = new Dictionary<string, decimal>();1168 foreach (var item in metrics)1169 {1170 if (SupportedMetrics.Contains(item.Name))1171 {1172 result.Add(item.Name, item.Value);1173 }1174 }1175 return result;1176 }1177 private async Task<byte[]> PerformScreenshot(string format, ScreenshotOptions options)1178 {1179 await Client.SendAsync("Target.activateTarget", new1180 {1181 targetId = Target.TargetId1182 });1183 var clip = options.Clip != null ? options.Clip.Clone() : null;1184 if (clip != null)1185 {1186 clip.Scale = 1;1187 }1188 if (options != null && options.FullPage)1189 {1190 dynamic metrics = await Client.SendAsync("Page.getLayoutMetrics");1191 var width = Convert.ToInt32(Math.Ceiling(Convert.ToDecimal(metrics.contentSize.width.Value)));1192 var height = Convert.ToInt32(Math.Ceiling(Convert.ToDecimal(metrics.contentSize.height.Value)));1193 // Overwrite clip for full page at all times.1194 clip = new Clip1195 {1196 X = 0,1197 Y = 0,1198 Width = width,1199 Height = height,1200 Scale = 11201 };1202 var mobile = Viewport.IsMobile;1203 var deviceScaleFactor = Viewport.DeviceScaleFactor;1204 var landscape = Viewport.IsLandscape;1205 var screenOrientation = landscape ?1206 new ScreenOrientation1207 {1208 Angle = 90,1209 Type = ScreenOrientationType.LandscapePrimary1210 } :1211 new ScreenOrientation1212 {1213 Angle = 0,1214 Type = ScreenOrientationType.PortraitPrimary1215 };1216 await Client.SendAsync("Emulation.setDeviceMetricsOverride", new1217 {1218 mobile,1219 width,1220 height,1221 deviceScaleFactor,1222 screenOrientation1223 });1224 }1225 if (options != null && options.OmitBackground)1226 {1227 await Client.SendAsync("Emulation.setDefaultBackgroundColorOverride", new1228 {1229 color = new1230 {1231 r = 0,1232 g = 0,1233 b = 0,1234 a = 01235 }1236 });1237 }1238 dynamic screenMessage = new ExpandoObject();1239 screenMessage.format = format;1240 if (options.Quality.HasValue)1241 {1242 screenMessage.quality = options.Quality.Value;1243 }1244 if (clip != null)1245 {1246 screenMessage.clip = clip;1247 }1248 JObject result = await Client.SendAsync("Page.captureScreenshot", screenMessage);1249 if (options != null && options.OmitBackground)1250 {1251 await Client.SendAsync("Emulation.setDefaultBackgroundColorOverride");1252 }1253 if (options != null && options.FullPage)1254 {1255 await SetViewportAsync(Viewport);1256 }1257 var buffer = Convert.FromBase64String(result.GetValue("data").Value<string>());1258 return buffer;1259 }1260 private decimal ConvertPrintParameterToInches(object parameter)1261 {1262 if (parameter == null)1263 {1264 return 0;1265 }1266 var pixels = 0m;1267 if (parameter is decimal || parameter is int)1268 {1269 pixels = Convert.ToDecimal(parameter);1270 }1271 else1272 {1273 var text = parameter.ToString();1274 var unit = text.Substring(text.Length - 2).ToLower();1275 var valueText = "";1276 if (_unitToPixels.ContainsKey(unit))1277 {1278 valueText = text.Substring(0, text.Length - 2);1279 }1280 else1281 {1282 // In case of unknown unit try to parse the whole parameter as number of pixels.1283 // This is consistent with phantom's paperSize behavior.1284 unit = "px";1285 valueText = text;1286 }1287 if (Decimal.TryParse(valueText, NumberStyles.Any, CultureInfo.InvariantCulture.NumberFormat, out var number))1288 {1289 pixels = number * _unitToPixels[unit];1290 }1291 else1292 {1293 throw new ArgumentException($"Failed to parse parameter value: '{text}'", nameof(parameter));1294 }1295 }1296 return pixels / 96;1297 }1298 private async void client_MessageReceived(object sender, MessageEventArgs e)1299 {1300 switch (e.MessageID)1301 {1302 case "Page.loadEventFired":1303 Load?.Invoke(this, new EventArgs());1304 break;1305 case "Runtime.consoleAPICalled":1306 await OnConsoleAPI(e.MessageData.ToObject<PageConsoleResponse>());1307 break;1308 case "Page.javascriptDialogOpening":1309 OnDialog(e.MessageData.ToObject<PageJavascriptDialogOpeningResponse>());1310 break;1311 case "Runtime.exceptionThrown":1312 HandleException(e.MessageData.exceptionDetails);1313 break;1314 case "Security.certificateError":1315 await OnCertificateError(e);1316 break;1317 case "Inspector.targetCrashed":1318 OnTargetCrashed();1319 break;1320 case "Performance.metrics":1321 EmitMetrics(e.MessageData.ToObject<PerformanceMetricsResponse>());1322 break;1323 }1324 }1325 private void OnTargetCrashed()1326 {1327 if (Error == null)1328 {1329 throw new TargetCrashedException();1330 }1331 Error.Invoke(this, new ErrorEventArgs("Page crashed!"));1332 }1333 private void EmitMetrics(PerformanceMetricsResponse metrics)1334 => Metrics?.Invoke(this, new MetricEventArgs(metrics.Title, BuildMetricsObject(metrics.Metrics)));1335 private async Task OnCertificateError(MessageEventArgs e)1336 {1337 if (_ignoreHTTPSErrors)1338 {1339 try1340 {1341 await Client.SendAsync("Security.handleCertificateError", new Dictionary<string, object>1342 {1343 {"eventId", e.MessageData.eventId },1344 {"action", "continue"}1345 });1346 }1347 catch (PuppeteerException ex)1348 {...

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BrowserContext.cs

Source:BrowserContext.cs Github

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...212 {213 Console.WriteLine("Page_Load");214 }215 }216 private void Page_Metrics(object sender, MetricEventArgs e)217 {218 if (DebugInfo)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)...

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MetricsTests.cs

Source:MetricsTests.cs Github

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...21 }22 [Fact]23 public async Task MetricsEventFiredOnConsoleTimespan()24 {25 var metricsTaskWrapper = new TaskCompletionSource<MetricEventArgs>();26 Page.Metrics += (sender, e) => metricsTaskWrapper.SetResult(e);27 await Page.EvaluateExpressionAsync("console.timeStamp('test42')");28 var result = await metricsTaskWrapper.Task;29 Assert.Equal("test42", result.Title);30 CheckMetrics(result.Metrics);31 }32 private void CheckMetrics(Dictionary<string, decimal> metrics)33 {34 var metricsToCheck = Page.SupportedMetrics.ToList();35 foreach (var name in metrics.Keys)36 {37 Assert.Contains(name, metricsToCheck);38 Assert.True(metrics[name] >= 0);39 metricsToCheck.Remove(name);...

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MetricEventArgs.cs

Source:MetricEventArgs.cs Github

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...4{5 /// <summary>6 /// <seealso cref="Page.Metrics"/> arguments.7 /// </summary>8 public class MetricEventArgs : EventArgs9 {10 /// <summary>11 /// Gets the title.12 /// </summary>13 /// <value>The title.</value>14 public string Title { get; }15 /// <summary>16 /// Gets the metrics.17 /// </summary>18 /// <value>The metrics.</value>19 public Dictionary<string, decimal> Metrics { get; }20 /// <summary>21 /// Initializes a new instance of the <see cref="MetricEventArgs"/> class.22 /// </summary>23 /// <param name="title">Title.</param>24 /// <param name="metrics">Metrics.</param>25 public MetricEventArgs(string title, Dictionary<string, decimal> metrics)26 {27 Title = title;28 Metrics = metrics;29 }30 }31}...

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MetricEventArgs

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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 Args = new string[] { "--window-size=800,600" }12 });13 var page = await browser.NewPageAsync();14 await page.SetViewportAsync(new ViewPortOptions { Width = 800, Height = 600 });15 page.MetricsChanged += Page_MetricsChanged;16 Console.ReadLine();17 }18 private static void Page_MetricsChanged(object sender, MetricEventArgs e)19 {20 Console.WriteLine(e.Metrics);21 }22 }23}24{ Timestamp = 1610035789835, Documents = 11, Frames = 2, JSEventListeners = 2, Nodes = 12, LayoutCount = 1, RecalcStyleCount = 1, LayoutDuration = 0.000000, RecalcStyleDuration = 0.000000, ScriptDuration = 0.000000, TaskDuration = 0.000000, JSHeapUsedSize = 0, JSHeapTotalSize = 0 }25{ Timestamp = 1610035790012, Documents = 11, Frames = 2, JSEventListeners = 2, Nodes = 12, LayoutCount = 1, RecalcStyleCount = 1, LayoutDuration = 0.000000, RecalcStyleDuration = 0.000000, ScriptDuration = 0.000000, TaskDuration = 0.000000, JSHeapUsedSize = 0, JSHeapTotalSize = 0 }26{ Timestamp = 1610035790185, Documents = 11, Frames = 2, JSEventListeners = 2, Nodes = 12, LayoutCount = 1, RecalcStyleCount = 1, LayoutDuration = 0.000000, RecalcStyleDuration = 0.000000, ScriptDuration = 0.000000, TaskDuration = 0.000000, JSHeapUsedSize = 0, JSHeapTotalSize = 0 }27{ Timestamp = 161003

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MetricEventArgs

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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 options = new LaunchOptions { Headless = false };10 using (var browser = await Puppeteer.LaunchAsync(options))11 using (var page = await browser.NewPageAsync())12 {13 page.Metrics += (sender, e) =>14 {15 Console.WriteLine("Metrics event fired");16 Console.WriteLine("Timestamp: " + e.Timestamp);17 Console.WriteLine("Title: " + e.Title);18 Console.WriteLine("URL: " + e.Url);19 Console.WriteLine("Frames: " + e.Frames);20 Console.WriteLine("JSEventListeners: " + e.JSEventListeners);21 Console.WriteLine("Documents: " + e.Documents);22 Console.WriteLine("Nodes: " + e.Nodes);23 Console.WriteLine("LayoutCount: " + e.LayoutCount);24 Console.WriteLine("RecalcStyleCount: " + e.RecalcStyleCount);25 Console.WriteLine("LayoutDuration: " + e.LayoutDuration);26 Console.WriteLine("RecalcStyleDuration: " + e.RecalcStyleDuration);27 Console.WriteLine("ScriptDuration: " + e.ScriptDuration);28 Console.WriteLine("TaskDuration: " + e.TaskDuration);29 Console.WriteLine("JSHeapUsedSize: " + e.JSHeapUsedSize);30 Console.WriteLine("JSHeapTotalSize: " + e.JSHeapTotalSize);31 };32 }33 }34 }35}

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MetricEventArgs

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 static void Main(string[] args)7 {8 MainAsync().GetAwaiter().GetResult();9 }10 static async Task MainAsync()11 {12 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions13 {14 }))15 {16 var page = await browser.NewPageAsync();17 await page.SetViewportAsync(new ViewPortOptions18 {19 });20 await page.ScreenshotAsync("screenshot.png");21 await page.WaitForSelectorAsync(".gLFyf");22 await page.TypeAsync(".gLFyf", "PuppeteerSharp");23 await page.ClickAsync(".FPdoLc > center > input[type=submit]:nth-child(1)");24 await page.WaitForSelectorAsync(".LC20lb");25 await page.ClickAsync(".LC20lb");26 await page.WaitForSelectorAsync("#firstHeading");27 var title = await page.GetTitleAsync();28 Console.WriteLine(title);29 await page.WaitForSelectorAsync("#firstHeading");30 var title = await page.GetTitleAsync();31 Console.WriteLine(title);32 }33 }34 }35}36using PuppeteerSharp;37using System;38using System.Threading.Tasks;39{40 {41 static void Main(string[] args)42 {43 MainAsync().GetAwaiter().GetResult();44 }45 static async Task MainAsync()46 {

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MetricEventArgs

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 var options = new LaunchOptions { Headless = false };9 using (var browser = await Puppeteer.LaunchAsync(options))10 using (var page = await browser.NewPageAsync())11 {12 page.Metrics += Page_Metrics;13 }14 }15 private static void Page_Metrics(object sender, MetricEventArgs e)16 {17 Console.WriteLine(e.Metrics);18 }19 }20}21{Timestamp=1594155736644, Documents=2, Frames=2, JSEventListeners=0, Nodes=9, LayoutCount=1, RecalcStyleCount=0, LayoutDuration=0.16199999999999998, RecalcStyleDuration=0, ScriptDuration=0.002, TaskDuration=0.001, JSHeapUsedSize=2705928, JSHeapTotalSize=4276736}

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MetricEventArgs

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 var browserFetcher = new BrowserFetcher();9 var revisionInfo = await browserFetcher.DownloadAsync(BrowserFetcher.DefaultRevision);10 var browser = await Puppeteer.LaunchAsync(new LaunchOptions11 {12 });13 var page = await browser.NewPageAsync();14 await page.GoToAsync("ht

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MetricEventArgs

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1using PuppeteerSharp;2using System;3using System.IO;4using System.Threading.Tasks;5{6 {7 static void Main(string[] args)8 {9 Console.WriteLine("Hello World!");10 MainAsync().GetAwaiter().GetResult();11 }12 static async Task MainAsync()13 {14 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });15 var page = await browser.NewPageAsync();16 page.Metrics += Page_Metrics;17 await page.PdfAsync("google.pdf");18 await browser.CloseAsync();19 }20 private static void Page_Metrics(object sender, MetricEventArgs e)21 {22 Console.WriteLine(e.Metrics.Title);23 }24 }25}

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MetricEventArgs

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 public string Title { get; set; }7 public string Metric { get; set; }8 public double Value { get; set; }9 }10}11using PuppeteerSharp;12using System;13using System.Threading.Tasks;14{15 {16 public async Task Run()17 {18 var browser = await Puppeteer.LaunchAsync(new LaunchOptions19 {20 Args = new string[] { "--disable-infobars" }21 });22 var page = await browser.NewPageAsync();23 page.Metrics += Page_Metrics;24 await browser.CloseAsync();25 }26 private void Page_Metrics(object sender, MetricEventArgs e)27 {28 Console.WriteLine($"{e.Title} {e.Metric} {e.Value}");29 }30 }31}32using PuppeteerSharp;33using System;34using System.Threading.Tasks;35{36 {37 public static async Task Main(string[] args)38 {39 var puppeteerSharp = new PuppeteerSharp();40 await puppeteerSharp.Run();41 }42 }43}44using PuppeteerSharp;45using System;46using System.Threading.Tasks;47{48 {49 public async Task Run()50 {51 var browser = await Puppeteer.LaunchAsync(new LaunchOptions52 {53 Args = new string[] { "--disable-infobars" }54 });55 var page = await browser.NewPageAsync();56 page.Metrics += Page_Metrics;57 await browser.CloseAsync();58 }59 private void Page_Metrics(object sender, MetricEventArgs e)60 {61 Console.WriteLine($"{e.Title} {e.Metric} {e.Value}");62 }63 }64}65using PuppeteerSharp;66using System;

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