How to use SendAsync method of PuppeteerSharp.CDPSession class

Best Puppeteer-sharp code snippet using PuppeteerSharp.CDPSession.SendAsync

Connection.cs

Source:Connection.cs Github

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...71 #region Public Methods72 internal int GetMessageID() => Interlocked.Increment(ref _lastId);73 internal Task RawSendASync(int id, string method, object args, string sessionId = null)74 {75 return Transport.SendAsync(JsonConvert.SerializeObject(76 new ConnectionRequest77 {78 Id = id,79 Method = method,80 Params = args,81 SessionId = sessionId82 },83 JsonHelper.DefaultJsonSerializerSettings));84 }85 internal async Task<JObject> SendAsync(string method, object args = null, bool waitForCallback = true)86 {87 if (IsClosed)88 {89 throw new TargetClosedException($"Protocol error({method}): Target closed.", CloseReason);90 }91 var id = GetMessageID();92 MessageTask callback = null;93 if (waitForCallback)94 {95 callback = new MessageTask96 {97 TaskWrapper = new TaskCompletionSource<JObject>(),98 Method = method99 };100 _callbacks[id] = callback;101 }102 await RawSendASync(id, method, args).ConfigureAwait(false);103 return waitForCallback ? await callback.TaskWrapper.Task.ConfigureAwait(false) : null;104 }105 internal async Task<T> SendAsync<T>(string method, object args = null)106 {107 var response = await SendAsync(method, args).ConfigureAwait(false);108 return response.ToObject<T>(true);109 }110 internal async Task<CDPSession> CreateSessionAsync(TargetInfo targetInfo)111 {112 var sessionId = (await SendAsync<TargetAttachToTargetResponse>("Target.attachToTarget", new TargetAttachToTargetRequest113 {114 TargetId = targetInfo.TargetId,115 Flatten = true116 }).ConfigureAwait(false)).SessionId;117 return await GetSessionAsync(sessionId).ConfigureAwait(false);118 }119 internal bool HasPendingCallbacks() => _callbacks.Count != 0;120 #endregion121 internal void Close(string closeReason)122 {123 if (IsClosed)124 {125 return;126 }...

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CDPSession.cs

Source:CDPSession.cs Github

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...8namespace PuppeteerSharp9{10 /// <summary>11 /// The CDPSession instances are used to talk raw Chrome Devtools Protocol:12 /// * Protocol methods can be called with <see cref="CDPSession.SendAsync(string, object, bool)"/> method.13 /// * Protocol events, using the <see cref="CDPSession.MessageReceived"/> event.14 ///15 /// Documentation on DevTools Protocol can be found here: <see href="https://chromedevtools.github.io/devtools-protocol/"/>.16 ///17 /// <code>18 /// <![CDATA[19 /// var client = await Page.Target.CreateCDPSessionAsync();20 /// await client.SendAsync("Animation.enable");21 /// client.MessageReceived += (sender, e) =>22 /// {23 /// if (e.MessageID == "Animation.animationCreated")24 /// {25 /// Console.WriteLine("Animation created!");26 /// }27 /// };28 /// JObject response = await client.SendAsync("Animation.getPlaybackRate");29 /// Console.WriteLine("playback rate is " + response.playbackRate);30 /// await client.SendAsync("Animation.setPlaybackRate", new31 /// {32 /// playbackRate = Convert.ToInt32(response.playbackRate / 2)33 /// });34 /// ]]></code>35 /// </summary>36 public class CDPSession37 {38 internal CDPSession(Connection connection, TargetType targetType, string sessionId)39 {40 Connection = connection;41 TargetType = targetType;42 SessionId = sessionId;43 _callbacks = new ConcurrentDictionary<int, MessageTask>();44 }45 #region Private Members46 private readonly ConcurrentDictionary<int, MessageTask> _callbacks;47 #endregion48 #region Properties49 /// <summary>50 /// Gets the target type.51 /// </summary>52 /// <value>The target type.</value>53 public TargetType TargetType { get; }54 /// <summary>55 /// Gets the session identifier.56 /// </summary>57 /// <value>The session identifier.</value>58 public string SessionId { get; }59 /// <summary>60 /// Gets the connection.61 /// </summary>62 /// <value>The connection.</value>63 internal Connection Connection { get; private set; }64 /// <summary>65 /// Occurs when message received from Chromium.66 /// </summary>67 public event EventHandler<MessageEventArgs> MessageReceived;68 /// <summary>69 /// Occurs when the connection is closed.70 /// </summary>71 public event EventHandler Disconnected;72 /// <summary>73 /// Gets or sets a value indicating whether this <see cref="CDPSession"/> is closed.74 /// </summary>75 /// <value><c>true</c> if is closed; otherwise, <c>false</c>.</value>76 public bool IsClosed { get; internal set; }77 /// <summary>78 /// Connection close reason.79 /// </summary>80 public string CloseReason { get; private set; }81 /// <summary>82 /// Gets the logger factory.83 /// </summary>84 /// <value>The logger factory.</value>85 #endregion86 #region Public Methods87 internal void Send(string method, object args = null)88 => _ = SendAsync(method, args, false);89 /// <summary>90 /// Protocol methods can be called with this method.91 /// </summary>92 /// <param name="method">The method name</param>93 /// <param name="args">The method args</param>94 /// <typeparam name="T">Return type.</typeparam>95 /// <returns>The task.</returns>96 public async Task<T> SendAsync<T>(string method, object args = null)97 {98 var content = await SendAsync(method, args).ConfigureAwait(false);99 return content.ToObject<T>(true);100 }101 /// <summary>102 /// Protocol methods can be called with this method.103 /// </summary>104 /// <param name="method">The method name</param>105 /// <param name="args">The method args</param>106 /// <param name="waitForCallback">107 /// If <c>true</c> the method will return a task to be completed when the message is confirmed by Chromium.108 /// If <c>false</c> the task will be considered complete after sending the message to Chromium.109 /// </param>110 /// <returns>The task.</returns>111 /// <exception cref="PuppeteerSharp.PuppeteerException"></exception>112 public async Task<JObject> SendAsync(string method, object args = null, bool waitForCallback = true)113 {114 if (Connection == null)115 {116 throw new PuppeteerException(117 $"Protocol error ({method}): Session closed. " +118 $"Most likely the {TargetType} has been closed." +119 $"Close reason: {CloseReason}");120 }121 var id = Connection.GetMessageID();122 MessageTask callback = null;123 if (waitForCallback)124 {125 callback = new MessageTask126 {127 TaskWrapper = new TaskCompletionSource<JObject>(),128 Method = method129 };130 _callbacks[id] = callback;131 }132 try133 {134 await Connection.RawSendASync(id, method, args, SessionId).ConfigureAwait(false);135 }136 catch (Exception ex)137 {138 if (waitForCallback && _callbacks.TryRemove(id, out _))139 {140 callback.TaskWrapper.TrySetException(new MessageException(ex.Message, ex));141 }142 }143 return waitForCallback ? await callback.TaskWrapper.Task.ConfigureAwait(false) : null;144 }145 /// <summary>146 /// Detaches session from target. Once detached, session won't emit any events and can't be used to send messages.147 /// </summary>148 /// <returns></returns>149 /// <exception cref="T:PuppeteerSharp.PuppeteerException"></exception>150 public Task DetachAsync()151 {152 if (Connection == null)153 {154 throw new PuppeteerException($"Session already detached.Most likely the {TargetType} has been closed.");155 }156 return Connection.SendAsync("Target.detachFromTarget", new TargetDetachFromTargetRequest157 {158 SessionId = SessionId159 });160 }161 internal bool HasPendingCallbacks() => _callbacks.Count != 0;162 #endregion163 #region Private Methods164 internal void OnMessage(ConnectionResponse obj)165 {166 var id = obj.Id;167 if (id.HasValue && _callbacks.TryRemove(id.Value, out var callback))168 {169 if (obj.Error != null)170 {...

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JSCoverage.cs

Source:JSCoverage.cs Github

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...34 _scriptURLs.Clear();35 _scriptSources.Clear();36 _client.MessageReceived += client_MessageReceived;37 await Task.WhenAll(38 _client.SendAsync("Profiler.enable"),39 _client.SendAsync("Profiler.startPreciseCoverage", new { callCount = false, detailed = true }),40 _client.SendAsync("Debugger.enable"),41 _client.SendAsync("Debugger.setSkipAllPauses", new { skip = true })42 );43 }44 internal async Task<CoverageEntry[]> StopAsync()45 {46 if (!_enabled)47 {48 throw new InvalidOperationException("JSCoverage is not enabled");49 }50 _enabled = false;51 var profileResponseTask = _client.SendAsync<ProfilerTakePreciseCoverageResponse>("Profiler.takePreciseCoverage");52 await Task.WhenAll(53 profileResponseTask,54 _client.SendAsync("Profiler.stopPreciseCoverage"),55 _client.SendAsync("Profiler.disable"),56 _client.SendAsync("Debugger.disable")57 );58 _client.MessageReceived -= client_MessageReceived;59 var coverage = new List<CoverageEntry>();60 foreach (var entry in profileResponseTask.Result.Result)61 {62 if (!_scriptURLs.TryGetValue(entry.ScriptId, out var url) ||63 !_scriptSources.TryGetValue(entry.ScriptId, out var text))64 {65 continue;66 }67 var flattenRanges = entry.Functions.SelectMany(f => f.Ranges).ToList();68 var ranges = Coverage.ConvertToDisjointRanges(flattenRanges);69 coverage.Add(new CoverageEntry70 {71 Url = url,72 Ranges = ranges,73 Text = text74 });75 }76 return coverage.ToArray();77 }78 private async void client_MessageReceived(object sender, MessageEventArgs e)79 {80 switch (e.MessageID)81 {82 case "Debugger.scriptParsed":83 await OnScriptParsed(e.MessageData.ToObject<DebuggerScriptParsedResponse>());84 break;85 case "Runtime.executionContextsCleared":86 OnExecutionContextsCleared();87 break;88 }89 }90 private async Task OnScriptParsed(DebuggerScriptParsedResponse scriptParseResponse)91 {92 if (string.IsNullOrEmpty(scriptParseResponse.Url))93 {94 return;95 }96 try97 {98 var response = await _client.SendAsync("Debugger.getScriptSource", new { scriptId = scriptParseResponse.ScriptId });99 _scriptURLs.Add(scriptParseResponse.ScriptId, scriptParseResponse.Url);100 _scriptSources.Add(scriptParseResponse.ScriptId, response.scriptSource.ToString());101 }102 catch (Exception ex)103 {104 _logger.LogError(ex.ToString());105 }106 }107 private void OnExecutionContextsCleared()108 {109 if (!_resetOnNavigation)110 {111 return;112 }...

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Tracing.cs

Source:Tracing.cs Github

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...6970 _path = options.Path;71 _recording = true;7273 await _client.SendAsync("Tracing.start", new74 {75 transferMode = "ReturnAsStream",76 categories = string.Join(", ", categories)77 });78 }7980 /// <summary>81 /// Stops tracing82 /// </summary>83 /// <returns>Stop task</returns>84 public async Task StopAsync()85 {86 var taskWrapper = new TaskCompletionSource<bool>();8788 async void EventHandler(object sender, TracingCompleteEventArgs e)89 {90 await ReadStream(e.Stream, _path);91 _client.TracingComplete -= EventHandler;92 taskWrapper.SetResult(true);93 }9495 _client.TracingComplete += EventHandler;9697 await _client.SendAsync("Tracing.end");9899 _recording = false;100101 await taskWrapper.Task;102 }103 private async Task ReadStream(string stream, string path)104 {105 using (var fs = new StreamWriter(path))106 {107 bool eof = false;108109 while (!eof)110 {111 var response = await _client.SendAsync<IOReadResponse>("IO.read", new112 {113 handle = stream114 });115116 eof = response.Eof;117118 await fs.WriteAsync(response.Data);119 }120 }121 await _client.SendAsync("IO.close", new122 {123 handle = stream124 });125 }126 }127}...

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CreateCDPSessionTests.cs

Source:CreateCDPSessionTests.cs Github

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...17 public async Task ShouldWork()18 {19 var client = await Page.Target.CreateCDPSessionAsync();20 await Task.WhenAll(21 client.SendAsync("Runtime.enable"),22 client.SendAsync("Runtime.evaluate", new RuntimeEvaluateRequest { Expression = "window.foo = 'bar'" })23 );24 var foo = await Page.EvaluateExpressionAsync<string>("window.foo");25 Assert.Equal("bar", foo);26 }27 [Fact]28 public async Task ShouldSendEvents()29 {30 var client = await Page.Target.CreateCDPSessionAsync();31 await client.SendAsync("Network.enable");32 var events = new List<object>();33 client.MessageReceived += (sender, e) =>34 {35 if (e.MessageID == "Network.requestWillBeSent")36 {37 events.Add(e.MessageData);38 }39 };40 await Page.GoToAsync(TestConstants.EmptyPage);41 Assert.Single(events);42 }43 [Fact]44 public async Task ShouldEnableAndDisableDomainsIndependently()45 {46 var client = await Page.Target.CreateCDPSessionAsync();47 await client.SendAsync("Runtime.enable");48 await client.SendAsync("Debugger.enable");49 // JS coverage enables and then disables Debugger domain.50 await Page.Coverage.StartJSCoverageAsync();51 await Page.Coverage.StopJSCoverageAsync();52 // generate a script in page and wait for the event.53 var eventTask = WaitEvent(client, "Debugger.scriptParsed");54 await Task.WhenAll(55 eventTask,56 Page.EvaluateExpressionAsync("//# sourceURL=foo.js")57 );58 // expect events to be dispatched.59 Assert.Equal("foo.js", eventTask.Result["url"].Value<string>());60 }61 [Fact]62 public async Task ShouldBeAbleToDetachSession()63 {64 var client = await Page.Target.CreateCDPSessionAsync();65 await client.SendAsync("Runtime.enable");66 var evalResponse = await client.SendAsync("Runtime.evaluate", new RuntimeEvaluateRequest67 {68 Expression = "1 + 2",69 ReturnByValue = true70 });71 Assert.Equal(3, evalResponse["result"]["value"].ToObject<int>());72 await client.DetachAsync();73 var exception = await Assert.ThrowsAnyAsync<Exception>(()74 => client.SendAsync("Runtime.evaluate", new RuntimeEvaluateRequest75 {76 Expression = "3 + 1",77 ReturnByValue = true78 }));79 Assert.Contains("Session closed.", exception.Message);80 }81 [Fact]82 public async Task ShouldThrowNiceErrors()83 {84 var client = await Page.Target.CreateCDPSessionAsync();85 async Task TheSourceOfTheProblems() => await client.SendAsync("ThisCommand.DoesNotExist");86 var exception = await Assert.ThrowsAsync<MessageException>(async () =>87 {88 await TheSourceOfTheProblems();89 });90 Assert.Contains("TheSourceOfTheProblems", exception.StackTrace);91 Assert.Contains("ThisCommand.DoesNotExist", exception.Message);92 }93 }94}...

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ProtocolStreamReader.cs

Source:ProtocolStreamReader.cs Github

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...17 {18 var eof = false;19 while (!eof)20 {21 var response = await client.SendAsync<IOReadResponse>("IO.read", new IOReadRequest22 {23 Handle = handle24 }).ConfigureAwait(false);25 eof = response.Eof;26 result.Append(response.Data);27 if (fs != null)28 {29 var data = Encoding.UTF8.GetBytes(response.Data);30 await fs.WriteAsync(data, 0, data.Length).ConfigureAwait(false);31 }32 }33 await client.SendAsync("IO.close", new IOCloseRequest34 {35 Handle = handle36 }).ConfigureAwait(false);37 return result.ToString();38 }39 finally40 {41 fs?.Dispose();42 }43 }44 internal static async Task<byte[]> ReadProtocolStreamByteAsync(CDPSession client, string handle, string path)45 {46 IEnumerable<byte> result = null;47 var eof = false;48 var fs = !string.IsNullOrEmpty(path) ? AsyncFileHelper.CreateStream(path, FileMode.Create) : null;49 try50 {51 while (!eof)52 {53 var response = await client.SendAsync<IOReadResponse>("IO.read", new IOReadRequest54 {55 Handle = handle56 }).ConfigureAwait(false);57 eof = response.Eof;58 var data = Convert.FromBase64String(response.Data);59 result = result == null ? data : result.Concat(data);60 if (fs != null)61 {62 await fs.WriteAsync(data, 0, data.Length).ConfigureAwait(false);63 }64 }65 await client.SendAsync("IO.close", new IOCloseRequest66 {67 Handle = handle68 }).ConfigureAwait(false);69 return result.ToArray();70 }71 finally72 {73 fs?.Dispose();74 }75 }76 }77}...

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EmulationManager.cs

Source:EmulationManager.cs Github

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...29 Angle = 0,30 Type = ScreenOrientationType.PortraitPrimary31 };32 await Task.WhenAll(new Task[]{33 _client.SendAsync("Emulation.setDeviceMetricsOverride", new34 {35 mobile,36 width,37 height,38 deviceScaleFactor,39 screenOrientation40 }),41 _client.SendAsync("Emulation.setTouchEmulationEnabled", new42 {43 enabled = viewport.HasTouch,44 configuration = viewport.IsMobile ? "mobile" : "desktop"45 })46 });47 var reloadNeeded = false;48 if (viewport.HasTouch && string.IsNullOrEmpty(_injectedTouchScriptId))49 {50 //TODO: It's not clear what to do here51 /*52 var source = $"({ injectedTouchEventsFunction})()";53 this._injectedTouchScriptId = (await this._client.send('Page.addScriptToEvaluateOnNewDocument', { source })).identifier;54 reloadNeeded = true;55 */56 }57 else if (!viewport.HasTouch && !string.IsNullOrEmpty(_injectedTouchScriptId))58 {59 await _client.SendAsync("Page.removeScriptToEvaluateOnNewDocument", new60 {61 identifier = _injectedTouchScriptId62 });63 _injectedTouchScriptId = null;64 reloadNeeded = true;65 }66 if (_emulatingMobile != mobile)67 {68 reloadNeeded = true;69 }70 _emulatingMobile = mobile;71 return reloadNeeded;72 }73 }...

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Touchscreen.cs

Source:Touchscreen.cs Github

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...31 {32 // Touches appear to be lost during the first frame after navigation.33 // This waits a frame before sending the tap.34 // @see https://crbug.com/61321935 await _client.SendAsync("Runtime.evaluate", new RuntimeEvaluateRequest36 {37 Expression = "new Promise(x => requestAnimationFrame(() => requestAnimationFrame(x)))",38 AwaitPromise = true39 }).ConfigureAwait(false);40 var touchPoints = new[] { new TouchPoint { X = Math.Round(x), Y = Math.Round(y) } };41 await _client.SendAsync("Input.dispatchTouchEvent", new InputDispatchTouchEventRequest42 {43 Type = "touchStart",44 TouchPoints = touchPoints,45 Modifiers = _keyboard.Modifiers46 }).ConfigureAwait(false);47 await _client.SendAsync("Input.dispatchTouchEvent", new InputDispatchTouchEventRequest48 {49 Type = "touchEnd",50 TouchPoints = Array.Empty<TouchPoint>(),51 Modifiers = _keyboard.Modifiers52 }).ConfigureAwait(false);53 }54 }55}...

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SendAsync

Using AI Code Generation

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1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions10 {11 Args = new string[] { "--disable-gpu", "--disable-dev-shm-usage" }12 });13 var page = await browser.NewPageAsync();14 var client = page.Target.CreateCDPSessionAsync();15 var response = await client.SendAsync("Network.enable");16 var response2 = await client.SendAsync("Network.getResponseBody", new { requestId = "1" });17 Console.WriteLine(response);18 Console.WriteLine(response2);19 }20 }21}22{result = null, id = 1}23{result = null, id = 2}

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SendAsync

Using AI Code Generation

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1var session = await page.Target.CreateCDPSessionAsync();2var response = await session.SendAsync("Network.enable");3Console.WriteLine(response.ToString());4var session = await page.Target.CreateCDPSessionAsync();5var response = await session.SendAsync("Network.enable");6Console.WriteLine(response.ToString());7var session = await page.Target.CreateCDPSessionAsync();8var response = await session.SendAsync("Network.enable");9Console.WriteLine(response.ToString());10var session = await page.Target.CreateCDPSessionAsync();11var response = await session.SendAsync("Network.enable");12Console.WriteLine(response.ToString());13var session = await page.Target.CreateCDPSessionAsync();14var response = await session.SendAsync("Network.enable");15Console.WriteLine(response.ToString());16var session = await page.Target.CreateCDPSessionAsync();17var response = await session.SendAsync("Network.enable");18Console.WriteLine(response.ToString());19var session = await page.Target.CreateCDPSessionAsync();20var response = await session.SendAsync("Network.enable");21Console.WriteLine(response.ToString());22var session = await page.Target.CreateCDPSessionAsync();23var response = await session.SendAsync("Network.enable");24Console.WriteLine(response.ToString());25var session = await page.Target.CreateCDPSessionAsync();26var response = await session.SendAsync("Network.enable");27Console.WriteLine(response.ToString());28var session = await page.Target.CreateCDPSessionAsync();29var response = await session.SendAsync("Network.enable");30Console.WriteLine(response.ToString());31var session = await page.Target.CreateCDPSessionAsync();32var response = await session.SendAsync("Network.enable");33Console.WriteLine(response.ToString());

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SendAsync

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4using PuppeteerSharp.Input;5using System.Threading;6{7 static void Main(string[] args)8 {9 MainAsync(args).GetAwaiter().GetResult();10 }11 static async Task MainAsync(string[] args)12 {13 {14 };15 using (var browser = await Puppeteer.LaunchAsync(options))16 {17 using (var page = await browser.NewPageAsync())18 {19 await page.WaitForSelectorAsync("input[title='Search']");20 await page.TypeAsync("input[title='Search']", "PuppeteerSharp");21 await page.Keyboard.PressAsync("Enter");22 await page.WaitForSelectorAsync("div.g");23 var searchResults = await page.QuerySelectorAllAsync("div.g");24 foreach (var searchResult in searchResults)25 {26 var title = await searchResult.QuerySelectorAsync("h3");27 if (title != null)28 {29 Console.WriteLine(await title.EvaluateFunctionAsync<string>("node => node.innerText"));30 }31 }32 }33 }34 }35}36using System;37using System.Threading.Tasks;38using PuppeteerSharp;39using PuppeteerSharp.Input;40using System.Threading;41{42 static void Main(string[] args)43 {44 MainAsync(args).GetAwaiter().GetResult();45 }46 static async Task MainAsync(string[] args)47 {48 {49 };50 using (var browser = await Puppeteer.LaunchAsync(options))51 {52 using (var page = await browser.NewPageAsync())53 {54 await page.WaitForSelectorAsync("input[title='Search']");55 await page.TypeAsync("input[title='Search']", "PuppeteerSharp");56 await page.Keyboard.PressAsync("Enter");57 await page.WaitForSelectorAsync("div.g");58 var searchResults = await page.QuerySelectorAllAsync("div.g");59 foreach (var searchResult in searchResults)60 {61 var title = await searchResult.QuerySelectorAsync("h3");62 if (title != null)

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SendAsync

Using AI Code Generation

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1using System.Threading.Tasks;2using PuppeteerSharp;3{4 {5 static async Task Main(string[] args)6 {7 var browser = await Puppeteer.LaunchAsync(new LaunchOptions8 {9 });10 var page = await browser.NewPageAsync();11 var client = page.Target.CreateCDPSessionAsync();12 await client.SendAsync("Emulation.setCPUThrottlingRate", new13 {14 });15 }16 }17}18using System.Threading.Tasks;19using PuppeteerSharp;20{21 {22 static async Task Main(string[] args)23 {24 var browser = await Puppeteer.LaunchAsync(new LaunchOptions25 {26 });27 var client = browser.GetCDPSessionAsync();28 await client.SendAsync("Emulation.setCPUThrottlingRate", new29 {30 });31 }32 }33}34using System.Threading.Tasks;35using PuppeteerSharp;36{37 {38 static async Task Main(string[] args)39 {40 var browser = await Puppeteer.LaunchAsync(new LaunchOptions41 {42 });43 var client = browser.GetCDPSessionAsync();44 await client.SendAsync("Emulation.setCPUThrottlingRate", new45 {46 });47 }48 }49}50using System.Threading.Tasks;51using PuppeteerSharp;52{53 {

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