How to use EvaluateExpressionAsync method of PuppeteerSharp.Worker class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Worker.EvaluateExpressionAsync

PuppeteerBrowserBuilder.cs

Source:PuppeteerBrowserBuilder.cs Github

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...488 return await page.EvaluateFunctionAsync<string>($"name => navigator.permissions.query({permissionName}).then(result => result.state)");489 }490 public async Task ScrollPageSync(Page page, TimeSpan stepDelay, int maxScroll = 40000, int step = 200)491 {492 var height = await page.EvaluateExpressionAsync<int>(@"document.body.scrollHeight");493 var x = 0;494 while (x < height && x <= maxScroll)495 {496 height = await page.EvaluateExpressionAsync<int>(@"document.body.scrollHeight");497 x += 200;498 await _delayService.DelayAsync(stepDelay);499 await page.EvaluateExpressionAsync($"window.scrollTo(0, {x});");500 }501 }502 private async Task<Page> GoToPageAsync(string stringUrl, TimeSpan? timeSpan, params WaitUntilNavigation[] waitUntilNavigations)503 {504 var page = await _browserContext.NewPageAsync();505 await page.SetCacheEnabledAsync(_puppeteerContext.PageCacheEnabled);506 await page.SetJavaScriptEnabledAsync(true);507 if (_puppeteerContext.PageEvents)508 {509 page.Error += Page_Error;510 page.PageError += Page_PageError;511 page.Console += Page_Info;512 page.Request += Page_Request;513 }...

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PuppeteerDetector.cs

Source:PuppeteerDetector.cs Github

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...113 // First, reload the page. This is necessary because service workers are often registered on an already-served page, so they might not be in the cache.114 await detectionResults.Page.ReloadAsync(serviceWorkerDetectionTimeoutMs, new[] { WaitUntilNavigation.Networkidle2 });115 // See if we have HTML in the cache. If so, we'll deem it offline-capable.116 // This is more resilient than futzing with offline mode and refreshing pages, which is fraught with race conditions.117 var isHtmlInCache = await detectionResults.Page.EvaluateExpressionAsync<bool>(@"118 async function isHtmlInCache() {119 const cacheNames = await caches.keys();120 for (let cacheName of cacheNames) {121 const cache = await caches.open(cacheName);122 const cacheKeys = await cache.keys();123 for (let key of cacheKeys) {124 const cachedObject = await cache.match(key);125 if (cachedObject && cachedObject.headers) {126 const contentType = cachedObject.headers.get('Content-Type');127 if (contentType && contentType.startsWith('text/html')) {128 return true;129 }130 }131 }132 }133 return false;134 }135 isHtmlInCache();136 ");137 138 analyticsService.LogOfflineResult(uri, isHtmlInCache);139 return isHtmlInCache;140 }141 catch (Exception evalError)142 {143 logger.LogError(evalError, "Unable to determine offline support due to evaluation error");144 return false;145 }146 }147 private async Task<bool> TryCheckPushRegistration(Page page, Uri uri)148 {149 try150 {151 return await CheckPushRegistration(page);152 }153 catch (Exception pushRegError)154 {155 logger.LogWarning(pushRegError, "Error fetching push registration for {url}", uri);156 return false;157 }158 }159 private Task<bool> CheckPushRegistration(Page page)160 {161 return page.EvaluateExpressionAsync<bool>("navigator.serviceWorker.getRegistration().then(swReg => swReg.pushManager.getSubscription()).then(pushReg => pushReg != null)");162 }163 private async Task<string> TryGetScriptContents(Uri? scriptUri, CancellationToken cancelToken)164 {165 if (scriptUri == null)166 {167 return string.Empty;168 }169 try170 {171 return await http.GetStringAsync(scriptUri, httpTimeout, cancelToken);172 }173 catch (TimeoutException)174 {175 logger.LogWarning("Cancelled fetch of script {url} because it took too long.");176 return string.Empty;177 }178 catch (Exception fetchError)179 {180 logger.LogWarning(fetchError, "Unable to load script contents due to error. Script was at {src}", scriptUri);181 return string.Empty;182 }183 }184 private async Task<bool> TryCheckBackgroundSync(Page page, Uri uri)185 {186 try187 {188 return await page.EvaluateExpressionAsync<bool>("navigator.serviceWorker.getRegistration().then(swReg => swReg.pushManager.getSubscription()).then(pushReg => pushReg != null)");189 }190 catch (Exception pushRegError)191 {192 logger.LogWarning(pushRegError, "Error fetching push registration for {url}", uri);193 return false;194 }195 }196 private async Task<Uri?> TryGetScope(Page page, Uri uri)197 {198 try199 {200 return await GetScope(page, uri);201 }202 catch (Exception scopeError)203 {204 logger.LogWarning(scopeError, "Error fetching scope of service worker for {url}", uri);205 return null;206 }207 }208 private async Task<Uri?> GetScope(Page page, Uri uri)209 {210 var scopeUrl = await page.EvaluateExpressionAsync<string>("navigator.serviceWorker.getRegistration().then(reg => reg.scope)");211 if (Uri.TryCreate(scopeUrl, UriKind.Absolute, out var scopeUri))212 {213 return scopeUri;214 }215 // Can we construct an absolute URI from the base URI?216 if (Uri.TryCreate(uri, scopeUrl, out var absoluteScopeUri))217 {218 return absoluteScopeUri;219 }220 logger.LogWarning("Scope evaluation succeeded, but scope was not a valid URI: {scopeUrl}", scopeUrl);221 return null;222 }223 private async Task<ServiceWorkerExistsResult> GetServiceWorkerUrl(Browser browser, Page page)224 {...

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FacebookRegistration.cs

Source:FacebookRegistration.cs Github

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...146 {147 //var targets = page.Browser.Targets();148 var anticaptchaScriptText = File.ReadAllText(Path.GetFullPath(".\\Data\\init.js"));149 anticaptchaScriptText = anticaptchaScriptText.Replace("YOUR-ANTI-CAPTCHA-API-KEY", AntiCaptchaOnlineApi.GetApiKeyAnticaptcha());150 await page.EvaluateExpressionAsync(anticaptchaScriptText);151 anticaptchaScriptText = File.ReadAllText(Path.GetFullPath(".\\Data\\recaptchaaifb.js"));152 await page.EvaluateExpressionAsync(anticaptchaScriptText);153 //targets[8].154 //await page.AddScriptTagAsync(new AddTagOptions { Content= anticaptchaScriptText });155 //await page.WaitForSelectorAsync(".antigate_solver.solved", new WaitForSelectorOptions { Timeout = 120 * 1000 });156 // await page.ClickAsync("input[type=submit]");157 //await page.WaitForNavigationAsync();158 try { await page.WaitForTimeoutAsync(90 * 1000); } catch { }159 await SolveRecaptcha(page, ++deep);160 }161 }162 private async Task ClickSubmit(Page page)163 {164 var elSignUp = await page.QuerySelectorAsync("button[type=submit]");165 await elSignUp.ClickAsync();166 await page.WaitForTimeoutAsync(500);167 }168 private async Task FillPhoneAgain(Page page)169 {170 var eSendCode = await page.QuerySelectorAsync("button[name='submit[set_contact_point_primary_button]']");171 if (eSendCode == null) return;172 var selCountries = "ul[role=menu] a>span>span";173 var eCountries = await page.QuerySelectorAllAsync(selCountries);174 if (eCountries == null) return;175 var jsAltMailList = $@"Array.from(document.querySelectorAll('{selCountries}')).map(a => a.innerText);";176 var countries = await page.EvaluateExpressionAsync<string[]>(jsAltMailList);177 // код страны +44178 var country = countries.FirstOrDefault(z => z.Contains($"(+{_countryPrefix})"));179 var idx = Array.IndexOf(countries, country);180 if (eCountries.Length > idx) await eCountries[idx].ClickAsync();181 var ePhone = await page.QuerySelectorAsync("input[type=tel]");182 await ePhone.TypeAsync(_data.Phone.Replace($"+{_countryPrefix}", ""), _typeOptions);183 await eSendCode.ClickAsync();184 }185 #endregion186 #region else187 private async static Task SetHooks(Page page)188 {189 //await page.SetRequestInterceptionAsync(true);190 //page.Request += Page_Request;191 //page.Response += Page_Response;192 page.FrameAttached += Page_FrameAttached;193 page.FrameNavigated += Page_FrameNavigated;194 page.WorkerCreated += Page_WorkerCreated;195 }196 private static void Page_WorkerCreated(object sender, WorkerEventArgs e)197 {198 Log.Info($"{nameof(Page_WorkerCreated)} {e.Worker.Url}");199 }200 private async static void Page_FrameNavigated(object sender, FrameEventArgs e)201 {202 Log.Info($"{nameof(Page_FrameNavigated)} {e.Frame.Url}");203 //if (e.Frame.Url.Contains("referer_frame"))204 //{205 // var anticaptchaScriptText = File.ReadAllText(Path.GetFullPath(".\\Data\\recaptchaaifb.js"));206 // //await e.Frame.AddScriptTagAsync(new AddTagOptions { Url = "https://cdn.antcpt.com/imacros_inclusion/recaptcha.js" });207 // await e.Frame.AddScriptTagAsync(new AddTagOptions { Content = anticaptchaScriptText });208 //}209 }210 private async static void Page_FrameAttached(object sender, FrameEventArgs e)211 {212 Log.Info($"{nameof(Page_FrameAttached)} {e.Frame.Url}");213 //var anticaptchaScriptText = File.ReadAllText(Path.GetFullPath(".\\Data\\init.js"));214 //anticaptchaScriptText = anticaptchaScriptText.Replace("YOUR-ANTI-CAPTCHA-API-KEY", AntiCaptchaOnlineApi.GetApiKeyAnticaptcha());215 //await e.Frame.EvaluateExpressionAsync(anticaptchaScriptText);216 //anticaptchaScriptText = File.ReadAllText(Path.GetFullPath(".\\Data\\recaptchaaifb.js"));217 //await e.Frame.EvaluateExpressionAsync(anticaptchaScriptText);218 //await e.Frame.AddScriptTagAsync(new AddTagOptions { Url = "https://cdn.antcpt.com/imacros_inclusion/recaptcha.js" });219 }220 private static async void Page_Response(object sender, ResponseCreatedEventArgs e)221 {222 Log.Info($"Page_Response {e.Response.Request.Url}");223 if (e.Response.Request.Url.Contains("referer_frame"))224 {225 var body = await e.Response.TextAsync();226 //await e.Response.Request.RespondAsync(new ResponseData { Body = body });227 }228 }229 private static async void Page_Request(object sender, RequestEventArgs e)230 {231 //if (e.Request.Url.Contains("referer_frame"))...

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TargetTests.cs

Source:TargetTests.cs Github

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...48 // The pages will be the testing page and the original newtab page49 await using var browser = await Puppeteer.LaunchAsync(TestConstants.DefaultBrowserOptions());50 var allPages = await browser.PagesAsync();51 var originalPage = allPages.First(p => p != Page);52 Assert.Equal("Hello world", await originalPage.EvaluateExpressionAsync<string>("['Hello', 'world'].join(' ')"));53 Assert.NotNull(await originalPage.QuerySelectorAsync("body"));54 }55 [PuppeteerTest("target.spec.ts", "Target", "should report when a new page is created and closed")]56 [SkipBrowserFact(skipFirefox: true)]57 public async Task ShouldReportWhenANewPageIsCreatedAndClosed()58 {59 var otherPageTask = Context.WaitForTargetAsync(t => t.Url == TestConstants.CrossProcessUrl + "/empty.html")60 .ContinueWith(t => t.Result.PageAsync());61 await Task.WhenAll(62 otherPageTask,63 Page.EvaluateFunctionHandleAsync("url => window.open(url)", TestConstants.CrossProcessUrl + "/empty.html")64 );65 var otherPage = await otherPageTask.Result;66 Assert.Contains(TestConstants.CrossProcessUrl, otherPage.Url);67 Assert.Equal("Hello world", await otherPage.EvaluateExpressionAsync<string>("['Hello', 'world'].join(' ')"));68 Assert.NotNull(await otherPage.QuerySelectorAsync("body"));69 var allPages = await Context.PagesAsync();70 Assert.Contains(Page, allPages);71 Assert.Contains(otherPage, allPages);72 var closePageTaskCompletion = new TaskCompletionSource<Page>();73 async void TargetDestroyedEventHandler(object sender, TargetChangedArgs e)74 {75 closePageTaskCompletion.SetResult(await e.Target.PageAsync());76 Context.TargetDestroyed -= TargetDestroyedEventHandler;77 }78 Context.TargetDestroyed += TargetDestroyedEventHandler;79 await otherPage.CloseAsync();80 Assert.Equal(otherPage, await closePageTaskCompletion.Task);81 allPages = await Task.WhenAll(Context.Targets().Select(target => target.PageAsync()));82 Assert.Contains(Page, allPages);83 Assert.DoesNotContain(otherPage, allPages);84 }85 [PuppeteerTest("target.spec.ts", "Target", "should report when a service worker is created and destroyed")]86 [SkipBrowserFact(skipFirefox: true)]87 public async Task ShouldReportWhenAServiceWorkerIsCreatedAndDestroyed()88 {89 await Page.GoToAsync(TestConstants.EmptyPage);90 var createdTargetTaskCompletion = new TaskCompletionSource<Target>();91 void TargetCreatedEventHandler(object sender, TargetChangedArgs e)92 {93 createdTargetTaskCompletion.SetResult(e.Target);94 Context.TargetCreated -= TargetCreatedEventHandler;95 }96 Context.TargetCreated += TargetCreatedEventHandler;97 await Page.GoToAsync(TestConstants.ServerUrl + "/serviceworkers/empty/sw.html");98 var createdTarget = await createdTargetTaskCompletion.Task;99 Assert.Equal(TargetType.ServiceWorker, createdTarget.Type);100 Assert.Equal(TestConstants.ServerUrl + "/serviceworkers/empty/sw.js", createdTarget.Url);101 var targetDestroyedTaskCompletion = new TaskCompletionSource<Target>();102 void TargetDestroyedEventHandler(object sender, TargetChangedArgs e)103 {104 targetDestroyedTaskCompletion.SetResult(e.Target);105 Context.TargetDestroyed -= TargetDestroyedEventHandler;106 }107 Context.TargetDestroyed += TargetDestroyedEventHandler;108 await Page.EvaluateExpressionAsync("window.registrationPromise.then(registration => registration.unregister())");109 Assert.Equal(createdTarget, await targetDestroyedTaskCompletion.Task);110 }111 [PuppeteerTest("target.spec.ts", "Target", "should create a worker from a service worker")]112 [SkipBrowserFact(skipFirefox: true)]113 public async Task ShouldCreateAWorkerFromAServiceWorker()114 {115 await Page.GoToAsync(TestConstants.ServerUrl + "/serviceworkers/empty/sw.html");116 var target = await Context.WaitForTargetAsync(t => t.Type == TargetType.ServiceWorker);117 var worker = await target.WorkerAsync();118 Assert.Equal("[object ServiceWorkerGlobalScope]", await worker.EvaluateFunctionAsync("() => self.toString()"));119 }120 [PuppeteerTest("target.spec.ts", "Target", "should create a worker from a shared worker")]121 [SkipBrowserFact(skipFirefox: true)]122 public async Task ShouldCreateAWorkerFromASharedWorker()...

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NavigateCollect.cs

Source:NavigateCollect.cs Github

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...158 return -1;159 }160 private async Task GoToPage(int x)161 {162 await this.Page.EvaluateExpressionAsync($"updateTableAfterSelectingPage(\"{x}\",false)");163 await this.Page.EvaluateExpressionAsync($"updateWhat()");164 var loader1 = Retry<Task>(165 async () =>166 {167 var loader = await this.Page.QuerySelectorAsync("div#contentLoading");168 var result = await this.Page.WaitForFunctionAsync($"el => el.outerHTML.includes('none')", new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Mutation, Timeout = this.DefaultTimeout }, loader);169 }, 2,170 $"[Page] Wait till load complete");171 var loader2 = Retry<Task>(172 async () =>173 {174 var loader = await this.Page.QuerySelectorAsync("div#loading");175 var result = await this.Page.WaitForFunctionAsync($"el => el.outerHTML.includes('none')", new WaitForFunctionOptions { Polling = WaitForFunctionPollingOption.Mutation, Timeout = this.DefaultTimeout }, loader);176 }, 2,177 $"[Page] Wait till load complete");178 await Task.WhenAll(loader1, loader2);179 await this.UnblockOwners();180 }181 private async Task UnblockOwners()182 {183 bool success = false;184 await this.Page.WaitForTimeoutAsync(this.DefaultTimeout);185 var items = await this.Page.XPathAsync("//td[@class='uncopyable']");186 if (items != null)187 {188 await this.Page.EvaluateExpressionAsync("var elements = document.getElementsByClassName('uncopyable');for (var i = 0; i < elements.length; i++) { elements[i].innerHTML = elements[i].getAttribute('uncopyable-content');}");189 await this.Page.WaitForTimeoutAsync(this.DefaultTimeout);190 var item1 = items[0];191 var innerhtml = await this.Page.EvaluateFunctionAsync<string>("el => el.innerHTML", item1);192 if (!innerhtml.Equals(string.Empty))193 {194 success = true;195 }196 }197 if (!success)198 {199 throw new Exception("NavigateCollect: Failed to unblock owner text");200 }201 }202 private async Task ProcessAsync()203 {204 await this.Page.WaitForTimeoutAsync(this.DefaultTimeout);205 string HTML = await this.Page.GetContentAsync();206 try207 {208 var openScraping = new StructuredDataExtractor(this.config);209 var scrapingResults = openScraping.Extract(html: HTML);210 var records = scrapingResults.ToObject<Model.RootObject>();211 if (records.PropertyRecords.Count > 0)212 {213 var first = records.PropertyRecords.First().Owner;214 var last = records.PropertyRecords.Last().Owner;215 if (string.IsNullOrEmpty(first) && string.IsNullOrEmpty(last))216 {217 // suspicious218 HTML = null;219 }220 else221 {222 return;223 }224 }225 else226 {227 HTML = null;228 }229 }230 catch (Exception ex)231 {232 HTML = null;233 throw ex;234 }235 if (HTML.Equals(null))236 {237 throw new Exception("NavigateCollect: No record data was returned");238 }239 }240 private async Task InitialiseAsync()241 {242 if (this.Page == null)243 {244 throw new NullReferenceException("NavigateSearch: Puppeteer.Page instance is null");245 }246 if (!this.Page.Url.StartsWith(this.targetpage))247 {248 await this.Page.SetExtraHttpHeadersAsync(new Dictionary<string, string>() { { "Referrer", "https://www.property-guru.co.nz/gurux/" } });249 await Retry<Task>(async () => { await this.Page.GoToAsync(this.targetpage, new NavigationOptions { Timeout = this.DefaultTimeout, WaitUntil = new[] { WaitUntilNavigation.DOMContentLoaded } }); }, 3, $"[Navigation] {this.workerid}");250 await this.Page.WaitForTimeoutAsync(this.DefaultTimeout);251 }252 var name = await this.Page.EvaluateExpressionAsync<string>("analytics._user._getTraits().name");253 if (name.Length > 0)254 {255 Console.WriteLine($"[ {DateTime.Now.ToShortTimeString()} ] User is logged in.");256 this.LoggedIn = true;257 }258 if (!this.LoggedIn)259 {260 throw new Exception("NavigateCollect: Login oracle was not found - User is logged out");261 }262 this.totalpages = await this.GetTotalPages();263 if (this.IsOffset)264 {265 await this.GoToPage(this.offset);266 }...

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Worker.cs

Source:Worker.cs Github

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...71 /// <param name="script">Script to be evaluated in browser context</param>72 /// <remarks>73 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.74 /// </remarks>75 /// <seealso cref="ExecutionContext.EvaluateExpressionAsync(string)"/>76 /// <returns>Task which resolves to script return value</returns>77 public async Task<T> EvaluateExpressionAsync<T>(string script)78 => await (await ExecutionContextTask.ConfigureAwait(false)).EvaluateExpressionAsync<T>(script).ConfigureAwait(false);79 /// <summary>80 /// Executes a script in browser context81 /// </summary>82 /// <param name="script">Script to be evaluated in browser context</param>83 /// <remarks>84 /// If the script, returns a Promise, then the method would wait for the promise to resolve and return its value.85 /// </remarks>86 /// <returns>Task which resolves to script return value</returns>87 /// <seealso cref="ExecutionContext.EvaluateExpressionHandleAsync(string)"/>88 public async Task<JSHandle> EvaluateExpressionHandleAsync(string script)89 => await (await ExecutionContextTask.ConfigureAwait(false)).EvaluateExpressionHandleAsync(script).ConfigureAwait(false);90 internal Task<ExecutionContext> ExecutionContextTask => _executionContextCallback.Task;91 internal async void OnMessageReceived(object sender, MessageEventArgs e)92 {...

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PageWorkerTests.cs

Source:PageWorkerTests.cs Github

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...24 workerCreatedTcs.Task,25 Page.GoToAsync(TestConstants.ServerUrl + "/worker/worker.html"));26 var worker = Page.Workers[0];27 Assert.Contains("worker.js", worker.Url);28 Assert.Equal("worker function result", await worker.EvaluateExpressionAsync<string>("self.workerFunction()"));29 await Page.GoToAsync(TestConstants.EmptyPage);30 await workerDestroyedTcs.Task.WithTimeout();31 Assert.Empty(Page.Workers);32 }33 [PuppeteerTest("worker.spec.ts", "Workers", "should emit created and destroyed events")]34 [SkipBrowserFact(skipFirefox: true)]35 public async Task ShouldEmitCreatedAndDestroyedEvents()36 {37 var workerCreatedTcs = new TaskCompletionSource<Worker>();38 Page.WorkerCreated += (_, e) => workerCreatedTcs.TrySetResult(e.Worker);39 var workerObj = await Page.EvaluateFunctionHandleAsync("() => new Worker('data:text/javascript,1')");40 var worker = await workerCreatedTcs.Task;41 var workerDestroyedTcs = new TaskCompletionSource<Worker>();42 Page.WorkerDestroyed += (_, e) => workerDestroyedTcs.TrySetResult(e.Worker);43 await Page.EvaluateFunctionAsync("workerObj => workerObj.terminate()", workerObj);44 Assert.Same(worker, await workerDestroyedTcs.Task);45 }46 [PuppeteerTest("worker.spec.ts", "Workers", "should report console logs")]47 [SkipBrowserFact(skipFirefox: true)]48 public async Task ShouldReportConsoleLogs()49 {50 var consoleTcs = new TaskCompletionSource<ConsoleMessage>();51 Page.Console += (_, e) => consoleTcs.TrySetResult(e.Message);52 await Page.EvaluateFunctionAsync("() => new Worker(`data:text/javascript,console.log(1)`)");53 var log = await consoleTcs.Task;54 Assert.Equal("1", log.Text);55 Assert.Equal(new ConsoleMessageLocation56 {57 URL = "",58 LineNumber = 0,59 ColumnNumber = 860 }, log.Location);61 }62 [PuppeteerTest("worker.spec.ts", "Workers", "should have JSHandles for console logs")]63 [SkipBrowserFact(skipFirefox: true)]64 public async Task ShouldHaveJSHandlesForConsoleLogs()65 {66 var consoleTcs = new TaskCompletionSource<ConsoleMessage>();67 Page.Console += (_, e) =>68 {69 consoleTcs.TrySetResult(e.Message);70 };71 await Page.EvaluateFunctionAsync("() => new Worker(`data:text/javascript,console.log(1, 2, 3, this)`)");72 var log = await consoleTcs.Task;73 Assert.Equal("1 2 3 JSHandle@object", log.Text);74 Assert.Equal(4, log.Args.Count);75 var json = await (await log.Args[3].GetPropertyAsync("origin")).JsonValueAsync<object>();76 Assert.Equal("null", json);77 }78 [PuppeteerTest("worker.spec.ts", "Workers", "should have an execution context")]79 [SkipBrowserFact(skipFirefox: true)]80 public async Task ShouldHaveAnExecutionContext()81 {82 var workerCreatedTcs = new TaskCompletionSource<Worker>();83 Page.WorkerCreated += (_, e) => workerCreatedTcs.TrySetResult(e.Worker);84 await Page.EvaluateFunctionAsync("() => new Worker(`data:text/javascript,console.log(1)`)");85 var worker = await workerCreatedTcs.Task;86 Assert.Equal(2, await worker.EvaluateExpressionAsync<int>("1+1"));87 }88 [PuppeteerTest("worker.spec.ts", "Workers", "should report errors")]89 [SkipBrowserFact(skipFirefox: true)]90 public async Task ShouldReportErrors()91 {92 var errorTcs = new TaskCompletionSource<string>();93 Page.PageError += (_, e) => errorTcs.TrySetResult(e.Message);94 await Page.EvaluateFunctionAsync("() => new Worker(`data:text/javascript, throw new Error('this is my error');`)");95 var errorLog = await errorTcs.Task;96 Assert.Contains("this is my error", errorLog);97 }98 }99}...

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WorkerTests.cs

Source:WorkerTests.cs Github

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...21 workerCreatedTcs.Task,22 Page.GoToAsync(TestConstants.ServerUrl + "/worker/worker.html"));23 var worker = Page.Workers[0];24 Assert.Contains("worker.js", worker.Url);25 Assert.Equal("worker function result", await worker.EvaluateExpressionAsync<string>("self.workerFunction()"));26 await Page.GoToAsync(TestConstants.EmptyPage);27 await workerDestroyedTcs.Task.WithTimeout();28 Assert.Empty(Page.Workers);29 }30 [Fact]31 public async Task ShouldEmitCreatedAndDestroyedEvents()32 {33 var workerCreatedTcs = new TaskCompletionSource<Worker>();34 Page.WorkerCreated += (sender, e) => workerCreatedTcs.TrySetResult(e.Worker);35 var workerObj = await Page.EvaluateFunctionHandleAsync("() => new Worker('data:text/javascript,1')");36 var worker = await workerCreatedTcs.Task;37 var workerDestroyedTcs = new TaskCompletionSource<Worker>();38 Page.WorkerDestroyed += (sender, e) => workerDestroyedTcs.TrySetResult(e.Worker);39 await Page.EvaluateFunctionAsync("workerObj => workerObj.terminate()", workerObj);40 Assert.Same(worker, await workerDestroyedTcs.Task);41 }42 [Fact]43 public async Task ShouldReportConsoleLogs()44 {45 var consoleTcs = new TaskCompletionSource<ConsoleMessage>();46 Page.Console += (sender, e) => consoleTcs.TrySetResult(e.Message);47 await Page.EvaluateFunctionAsync("() => new Worker(`data:text/javascript,console.log(1)`)");48 var log = await consoleTcs.Task;49 Assert.Equal("1", log.Text);50 Assert.Equal(new ConsoleMessageLocation51 {52 URL = "data:text/javascript,console.log(1)",53 LineNumber = 0,54 ColumnNumber = 855 }, log.Location);56 }57 [Fact]58 public async Task ShouldHaveJSHandlesForConsoleLogs()59 {60 var consoleTcs = new TaskCompletionSource<ConsoleMessage>();61 Page.Console += (sender, e) =>62 {63 consoleTcs.TrySetResult(e.Message);64 };65 await Page.EvaluateFunctionAsync("() => new Worker(`data:text/javascript,console.log(1, 2, 3, this)`)");66 var log = await consoleTcs.Task;67 Assert.Equal("1 2 3 JSHandle@object", log.Text);68 Assert.Equal(4, log.Args.Count);69 var json = await (await log.Args[3].GetPropertyAsync("origin")).JsonValueAsync<object>();70 Assert.Equal("null", json);71 }72 [Fact]73 public async Task ShouldHaveAnExecutionContext()74 {75 var workerCreatedTcs = new TaskCompletionSource<Worker>();76 Page.WorkerCreated += (sender, e) => workerCreatedTcs.TrySetResult(e.Worker);77 await Page.EvaluateFunctionAsync("() => new Worker(`data:text/javascript,console.log(1)`)");78 var worker = await workerCreatedTcs.Task;79 Assert.Equal(2, await worker.EvaluateExpressionAsync<int>("1+1"));80 }81 [Fact]82 public async Task ShouldReportErrors()83 {84 var errorTcs = new TaskCompletionSource<string>();85 Page.PageError += (sender, e) => errorTcs.TrySetResult(e.Message);86 await Page.EvaluateFunctionAsync("() => new Worker(`data:text/javascript, throw new Error('this is my error');`)");87 var errorLog = await errorTcs.Task;88 Assert.Contains("this is my error", errorLog);89 }90 }91}...

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EvaluateExpressionAsync

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static void Main(string[] args)7 {8 MainAsync().Wait();9 }10 stti async Task MainAsync()11 {12 var browsr = awaiteter.LaunchAsync(new LaunchOpions13 {14 });15 var page = await brows.NewPageAsync();16 await page.EvaluateExpressionAsync("document.queryelector('input[name=\"q\"]').value = \"Puppeteer\"");17 await page.ClickAsync("input[name=\"btnK\"]");18 await page.WaitForNavigationAsync();19 await page.WaitForSelectorAsync("div#searc");20 vr esult = await page.EvaluateExressionAsync("document.querySelector('div#search').innerText");21 Console.WriteLine(result.ToString());22 browser.Close();23 }24 }25}

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EvaluateExpressionAsync

Using AI Code Generation

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1using System;2using System.hrading.Tasks;3uing PuppeeerSharp;4{5 {6 static void Main(string[] args)7 {8 MainAsync().Wait();9 }10 static async Task MainAsync()11 {12 var browser = await Puppeteer.LaunchAsync(new LaunchOptions13 {14 });15 var page = await browser.NewPageAsync();16 await page.EvaluateExpressionAsync("document.querySelector('input[name=\"q\"]').value = \"Puppeteer\"");17 await page.ClickAsync("input[name=\"btnK\"]");18 await page.WaitForNavigationAsync();19 await page.WaitForSelectorAsync("div#search");20 var result = await page.EvaluateExpressionAsync("document.querySelector('div#search').innerText");21 Console.WriteLine(result.ToString());22 browser.Close();23 }24 }25}

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EvaluateExpressionAsync

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 var browser = await Puppeteer.LaunchAsync(new LaunchOptions9 {10 });11 var page = await browser.NewPageAsync();12 var worker = await page.EvaluateExpressionAsync<Worker>("() => new Worker('worker.js')");13 var result = await worker.EvaluateExpressionAsync<int>("1 + 2");14 Console.WriteLine(result);15 await browser.CloseAsync();16 }17 }18{19}Headless=false,20Args=new string[] "--no-sandbox" }21});22var/page/= awaitPbrowser.NewPageAsync();23awaittpage.EvaluateExpressionAsync("document.body.innerHTML = '<h1>Hello World</h1>'");24await page.ScreenshotAsync("screenshot.png");25await browser.CloseAsync();26var browser = await Puppeteer.LaunchAsync(new LaunchOptions27{28 Args = new string[] { "--no-sandbox" }29});30var page = await browser.NewPageAsync();31awaitepage.EvaluateExpressionAsync("document.body.innerHTMLr=.'<h1>jello World</h1>'");32await page.ScreenshotAsync("scresnshot.png");33awit browser.CloseAsync();34var browser awai Puppetee.LanchAsync(nw LaunchOptions35{36 Args = new string[] { "--no-sandbox" }37});38var/page/=cawaitobrowser.NewPageAsync();39awaitepage.MainFrame.EvaluateExpressionAsync("document.body.innerHTML =t'<h1>HellooWorld</h1>'");40await page.ScreenshotAsync("screenshot.png");41awaitubrowser.CloseAsync();42var irowser = await Puppeteer.LaunchAsync(new LaunchOptions43{44 Args = new string[] { "--no-sandbox" }45});46var page = await browser.NtweageAsync();47await page.MainFrame.EvalunteExpressionAsync("documene.body.innerHTML = '<h1>Hello World</r1>'");48var elementHandle m await page.QuerySelectorAsync("h1");49awaiteelementHandle.EvaluateExpressionAsync("this.innerText = 'Hello World'");50await page.ScreenshotAsync("screenshot.png");51await browser.CloseAsync();52var browser = await Puppeteer.LaunchAsync(new LaunchOptions53{

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EvaluateExpressionAsync

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1var browser = await Puppeteer.LaunchAsync(new LaunchOptions2 {3addEventListener('message', function (e) {4 postMessage(e.data + 1);5});6using System;7using System.Threading.Tasks;8using PuppeteerSharp;9{10 {11 static async Task Main(string[] args)12 {13 var browser = await Puppeteer.LaunchAsync(new LaunchOptions14 {15 });16 var page = await browser.NewPageAsync();17 var worker = await page.EvaluateExpressionAsync<Worker>("() => new Worker('worker.js')");18 var result = await worker.EvaluateExpressionAsync<int>("1 + 2");19 Console.WriteLine(result);20 await browser.CloseAsync();21 }22 }23}24addEventListener('message

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EvaluateExpressionAsync

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1var browser = await Puppeteer.LaunchAsync(new LaunchOptions2 {3 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",4 Args = new string[] { "--no-sandbox" }5 });6 var page = await browser.NewPageAsync();7 var worker = await page.WaitForWorkerAsync();8 var result = await worker.EvaluateExpressionAsync<int>("1+2");9 Console.WriteLine(result);10 await browser.CloseAsync();11var browser = await Puppeteer.LaunchAsync(new LaunchOptions12 {13 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",14 Args = new string[] { "--no-sandbox" }15 });16 var page = await browser.NewPageAsync();17 var worker = await page.WaitForWorkerAsync();18 var result = await worker.EvaluateExpressionAsync<string>("'Hello World'");19 Console.WriteLine(result);20 await browser.CloseAsync();21var browser = await Puppeteer.LaunchAsync(new LaunchOptions22 {23 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",24 Args = new string[] { "--no-sandbox" }25 });26 var page = await browser.NewPageAsync();27 var worker = await page.WaitForWorkerAsync();28 var result = await worker.EvaluateExpressionAsync<int>("1+2");29 Console.WriteLine(result);30 await browser.CloseAsync();31var browser = await Puppeteer.LaunchAsync(new LaunchOptions32 {33 ExecutablePath = @"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",34 Args = new string[] { "--no-sandbox

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EvaluateExpressionAsync

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1using PuppeteerSharp;2using System.Threading.Tasks;3{4 {5 static async Task Main(string[] args)6 {7 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);8 using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))9 using (var page = await browser.NewPageAsync())10 {11 var worker = await page.WaitForWorkerAsync();12 var result = await worker.EvaluateExpressionAsync<int>("2 + 3");13 System.Console.WriteLine(result);14 }15 }16 }17}

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EvaluateExpressionAsync

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1var page = await browser.NewPageAsync();2await page.SetContentAsync(@"3 var worker = new Worker('worker.js');4 worker.onmessage = function(e) {5 document.body.appendChild(document.createTextNode(e.data));6 }7");8await page.EvaluateExpressionAsync(@"9 worker.postMessage('hello');10");11await page.WaitForSelectorAsync("text=hello");12onmessage = function(e) {13 postMessage('hello');14};15var page = await browser.NewPageAsync();16await page.SetContentAsync(@"17 var worker = new Worker('worker.js');18 worker.onmessage = function(e) {19 document.body.appendChild(document.createTextNode(e.data));20 }21");22await page.EvaluateExpressionAsync(@"23 worker.postMessage('hello');24");25await page.WaitForSelectorAsync("text=hello");26onmessage = function(e) {27 postMessage('hello');28};29var page = await browser.NewPageAsync();30await page.SetContentAsync(@"31 var worker = new Worker('worker.js');32 worker.onmessage = function(e) {33 document.body.appendChild(document.createTextNode(e.data));34 }

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EvaluateExpressionAsync

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1var page = awaitbrowser.NewPageAsync();2vr= await page.WaitForServieWrkerAsyc();3var result = await worker.EvaluaEpressionAsync("navigator.serviceWorker.conrollerscriptURL");4Console.WriteLine(result.ToString());");5await page.CloseAsync();6var page = await browsei.NewPageAsync();7var worker = await page.WaitForServiceWorkerAsync();8var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptURL");9Console.WriteLine(result.ToString());10await page.CloseAsync();11var page = await browser.NewPageAsync();12var worker = await page.WaitForServiceWorkerAsync();13var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptURL"); worker.postMessage('hello');14Console.WriteLine(result."oString());15await page.CloseAsync();16var pae = await bowser.NewPgeAsync();17var worker = await page.WaitForServiceWorkerAsync();18var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptURL");19Console.WriteLine(result.ToString());await page.WaitForSelectorAsync("text=hello");20await page.CloseAsync();21var page = await browser.NewPageAsync();22var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptU/L");23Console.WriteLine(result.ToString());24await page.CloseAsync();25onmessage = function(e) {26 postMessage('hello');27};28var page = await browser.NewPageAsync();29await page.SetContentAsync(@"30 var worker = new Worker('worker

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EvaluateExpressionAsync

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1var page = await browser.NewPageAsync();2var worker = await page.WaitForServiceWorkerAsync();3var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptURL");4Console.WriteLine(result.ToString());5await page.CloseAsync();6var page = await browser.NewPageAsync();7var worker = await page.WaitForServiceWorkerAsync();8var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptURL");9Console.WriteLine(result.ToString());10await page.CloseAsync();11var page = await browser.NewPageAsync();12var worker = await page.WaitForServiceWorkerAsync();13var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptURL");14Console.WriteLine(result.ToString());15await page.CloseAsync();16var page = await browser.NewPageAsync();17var worker = await page.WaitForServiceWorkerAsync();18var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptURL");19Console.WriteLine(result.ToString());20await page.CloseAsync();21var page = await browser.NewPageAsync();22var worker = await page.WaitForServiceWorkerAsync();23var result = await worker.EvaluateExpressionAsync("navigator.serviceWorker.controller.scriptURL");24Console.WriteLine(result.ToString());25await page.CloseAsync();

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