How to use StartAsync method of PuppeteerSharp.Tracing class

Best Puppeteer-sharp code snippet using PuppeteerSharp.Tracing.StartAsync

Program.cs

Source:Program.cs Github

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...90 var browser = await Puppeteer.LaunchAsync(options).ConfigureAwait(false);91 92 var page = await browser.NewPageAsync().ConfigureAwait(false);93 94 //await page.Tracing.StartAsync(new TracingOptions { Path = "" }).ConfigureAwait(false);95 //await page.Tracing.StopAsync().ConfigureAwait(false);96 //await page.CloseAsync().ConfigureAwait(false);97 var tryLimit = 30;98 var currentTry = 0;99 while (currentTry < tryLimit)100 {101 while (links.TryDequeue(out var nextUrl))102 {103 currentTry = 0;104 try105 {106 logger.LogInformation("{threadId} Getting url {nextUrl}", threadId, nextUrl);107 Response? pageNav = null;108 var tries = 0;...

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Scrape.cs

Source:Scrape.cs Github

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...49 {50 Width = width,51 Height = height52 });53 await page.Tracing.StartAsync(new TracingOptions54 {55 Categories = new List<string> { "devtools.timeline" }56 });57 var client = await page.Target.CreateCDPSessionAsync();58 await client.SendAsync("Network.clearBrowserCache");59 await page.GoToAsync(url, timeout: 0);60 string rawTrace = await page.Tracing.StopAsync();61 string content = await page.GetContentAsync();62 //Image63 var imageElements = await page.QuerySelectorAllAsync("img");64 if (imageElements != null)65 {66 imageCount = imageElements.Count();67 imageProperties = await new ImageHelper().GetImageData(imageElements);...

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TracingTests.cs

Source:TracingTests.cs Github

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...49 [PuppeteerTest("tracing.spec.ts", "Tracing", "should output a trace")]50 [SkipBrowserFact(skipFirefox: true)]51 public async Task ShouldOutputATrace()52 {53 await Page.Tracing.StartAsync(new TracingOptions54 {55 Screenshots = true,56 Path = _file57 });58 await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");59 await Page.Tracing.StopAsync();60 Assert.True(File.Exists(_file));61 }62 [PuppeteerTest("tracing.spec.ts", "Tracing", "should run with custom categories if provided")]63 [SkipBrowserFact(skipFirefox: true)]64 public async Task ShouldRunWithCustomCategoriesProvided()65 {66 await Page.Tracing.StartAsync(new TracingOptions67 {68 Screenshots = true,69 Path = _file,70 Categories = new List<string>71 {72 "disabled-by-default-v8.cpu_profiler.hires"73 }74 });75 await Page.Tracing.StopAsync();76 using (var file = File.OpenText(_file))77 using (var reader = new JsonTextReader(file))78 {79 var traceJson = JToken.ReadFrom(reader);80 Assert.Contains("disabled-by-default-v8.cpu_profiler.hires", traceJson["metadata"]["trace-config"].ToString());81 }82 }83 [PuppeteerTest("tracing.spec.ts", "Tracing", "should throw if tracing on two pages")]84 [SkipBrowserFact(skipFirefox: true)]85 public async Task ShouldThrowIfTracingOnTwoPages()86 {87 await Page.Tracing.StartAsync(new TracingOptions88 {89 Path = _file90 });91 var newPage = await Browser.NewPageAsync();92 await Assert.ThrowsAsync<InvalidOperationException>(async () =>93 {94 await Page.Tracing.StartAsync(new TracingOptions95 {96 Path = _file97 });98 });99 await newPage.CloseAsync();100 await Page.Tracing.StopAsync();101 }102 [PuppeteerTest("tracing.spec.ts", "Tracing", "should return a buffer")]103 [SkipBrowserFact(skipFirefox: true)]104 public async Task ShouldReturnABuffer()105 {106 await Page.Tracing.StartAsync(new TracingOptions107 {108 Screenshots = true,109 Path = _file110 });111 await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");112 var trace = await Page.Tracing.StopAsync();113 var buf = File.ReadAllText(_file);114 Assert.Equal(trace, buf);115 }116 [PuppeteerTest("tracing.spec.ts", "Tracing", "should work without options")]117 [SkipBrowserFact(skipFirefox: true)]118 public async Task ShouldWorkWithoutOptions()119 {120 await Page.Tracing.StartAsync();121 await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");122 var trace = await Page.Tracing.StopAsync();123 Assert.NotNull(trace);124 }125 [PuppeteerTest("tracing.spec.ts", "Tracing", "should support a buffer without a path")]126 [SkipBrowserFact(skipFirefox: true)]127 public async Task ShouldSupportABufferWithoutAPath()128 {129 await Page.Tracing.StartAsync(new TracingOptions130 {131 Screenshots = true132 });133 await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");134 var trace = await Page.Tracing.StopAsync();135 Assert.Contains("screenshot", trace);136 }137 }138}...

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Tracing.cs

Source:Tracing.cs Github

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...6using PuppeteerSharp.Messaging;7namespace PuppeteerSharp8{9 /// <summary>10 /// You can use <see cref="Tracing.StartAsync(TracingOptions)"/> and <see cref="Tracing.StopAsync"/> to create a trace file which can be opened in Chrome DevTools or timeline viewer.11 /// </summary>12 /// <example>13 /// <code>14 /// await Page.Tracing.StartAsync(new TracingOptions15 /// {16 /// Screenshots = true,17 /// Path = _file18 /// });19 /// await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");20 /// await Page.Tracing.StopAsync();21 /// </code>22 /// </example>23 public class Tracing24 {25 private readonly CDPSession _client;26 private bool _recording;27 private string _path;28 private static readonly List<string> _defaultCategories = new List<string>29 {30 "-*",31 "devtools.timeline",32 "v8.execute",33 "disabled-by-default-devtools.timeline",34 "disabled-by-default-devtools.timeline.frame",35 "toplevel",36 "blink.console",37 "blink.user_timing",38 "latencyInfo",39 "disabled-by-default-devtools.timeline.stack",40 "disabled-by-default-v8.cpu_profiler"41 };42 internal Tracing(CDPSession client)43 {44 _client = client;45 }46 /// <summary>47 /// Starts tracing.48 /// </summary>49 /// <returns>Start task</returns>50 /// <param name="options">Tracing options</param>51 public Task StartAsync(TracingOptions options)52 {53 if (_recording)54 {55 throw new InvalidOperationException("Cannot start recording trace while already recording trace.");56 }57 var categories = options.Categories ?? _defaultCategories;58 if (options.Screenshots)59 {60 categories.Add("disabled-by-default-devtools.screenshot");61 }62 _path = options.Path;63 _recording = true;64 return _client.SendAsync("Tracing.start", new65 {...

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TracingOptions.cs

Source:TracingOptions.cs Github

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1using System.Collections.Generic;2namespace PuppeteerSharp3{4 /// <summary>5 /// Tracing options used on <see cref="Tracing.StartAsync(TracingOptions)"/>.6 /// </summary>7 public class TracingOptions8 {9 /// <summary>10 /// Gets or sets a value indicating whether Tracing should captures screenshots in the trace11 /// </summary>12 /// <value>Screenshots option</value>13 public bool Screenshots { get; set; }14 /// <summary>15 /// A path to write the trace file to16 /// </summary>17 /// <value>The path.</value>18 public string Path { get; set; }19 /// <summary>...

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StartAsync

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var options = new LaunchOptions { Headless = true };10 using (var browser = await Puppeteer.LaunchAsync(options))11 using (var page = await browser.NewPageAsync())12 {13 var tracing = await page.Tracing.StartAsync(new TracingOptions { Path = "trace.json" });14 await tracing.StopAsync();15 }16 }17 }18}19{20 {21 "args": {22 "data": {23 {24 }25 }26 }27 },28 {29 "args": {30 "data": {31 "request": {32 "headers": {33 "User-Agent": "Mozilla/5.0 (Windows NT 10.0;

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StartAsync

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions10 {11 Args = new[] { "--no-sandbox" }12 });13 var page = await browser.NewPageAsync();14 await page.TypeAsync("input[title='Search']", "PuppeteerSharp");15 await page.ClickAsync("input[value='Google Search']");16 await page.WaitForNavigationAsync();17 var trace = await page.Tracing.StartAsync(new TracingOptions18 {19 });20 await page.ClickAsync("a[href='

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StartAsync

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 {9 };10 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);11 var browser = await Puppeteer.LaunchAsync(options);12 var page = await browser.NewPageAsync();13 var tracing = await page.Tracing.StartAsync(new TracingOptions { Path = "trace.json" });14 await tracing.StopAsync();15 await browser.CloseAsync();16 }17 }18}19using System;20using System.Threading.Tasks;21using PuppeteerSharp;22{23 {24 static async Task Main(string[] args)25 {26 {27 };28 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);29 var browser = await Puppeteer.LaunchAsync(options);30 var page = await browser.NewPageAsync();31 var tracing = await page.Tracing.StartAsync(new TracingOptions { Path = "trace.json" });32 await tracing.StopAsync();33 await browser.CloseAsync();34 }35 }36}37using System;38using System.Threading.Tasks;39using PuppeteerSharp;40{41 {42 static async Task Main(string[] args)43 {44 {45 };46 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);47 var browser = await Puppeteer.LaunchAsync(options);48 var page = await browser.NewPageAsync();49 var tracing = await page.Tracing.StartAsync(new TracingOptions { Path = "trace.json

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StartAsync

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 public static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });10 var page = await browser.NewPageAsync();11 await page.Tracing.StartAsync(new TracingOptions12 {13 Categories = new[] { "devtools.timeline" }14 });15 await page.EvaluateFunctionAsync("() => alert('Hello World!')");16 await page.Tracing.StopAsync();17 await browser.CloseAsync();18 }19 }20}21using System;22using System.Threading.Tasks;23using PuppeteerSharp;24{25 {26 public static async Task Main(string[] args)27 {28 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);29 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });30 var page = await browser.NewPageAsync();31 await page.Tracing.StartAsync(new TracingOptions32 {33 Categories = new[] { "devtools.timeline" }34 });35 await page.EvaluateFunctionAsync("() => alert('Hello World!')");36 await page.Tracing.StopAsync();37 await browser.CloseAsync();38 }39 }40}41using System;42using System.Threading.Tasks;43using PuppeteerSharp;44{45 {46 public static async Task Main(string[] args)47 {48 await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);49 var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true });50 var page = await browser.NewPageAsync();51 await page.Tracing.StartAsync(new TracingOptions52 {

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StartAsync

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 {9 };10 using (var browser = await Puppeteer.LaunchAsync(options))11 using (var page = await browser.NewPageAsync())12 {13 await page.WaitForSelectorAsync("input[name=q]");14 await page.TypeAsync("input[name=q]", "PuppeteerSharp");15 await page.ClickAsync("input[name=btnK]");

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StartAsync

Using AI Code Generation

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1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5 {6 static async Task Main(string[] args)7 {8 await new BrowserFetcher().DownloadAsync();9 var options = new LaunchOptions { Headless = false };10 using (var browser = await Puppeteer.LaunchAsync(options))11 using (var page = await browser.NewPageAsync())12 {13 var tracing = await browser.StartTracingAsync(new TraceOptions14 {15 Categories = new string[] { "devtools.timeline" },16 });17 await tracing.StopAsync();18 }19 }20 }21}

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StartAsync

Using AI Code Generation

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1using System;2using System.IO;3using System.Threading.Tasks;4using PuppeteerSharp;5{6 {7 static async Task Main(string[] args)8 {9 var browser = await Puppeteer.LaunchAsync(new LaunchOptions10 {11 Args = new string[] { "--start-maximized" }12 });13 var page = await browser.NewPageAsync();14 var tracing = await page.Tracing.StartAsync(new TracingOptions15 {16 });17 await tracing.StopAsync();18 var trace = await tracing.GetTraceAsync();19 File.WriteAllText("trace.json", trace);20 var traceBuffer = await tracing.GetTraceBufferAsync();21 File.WriteAllText("trace.json", traceBuffer);22 await tracing.DisposeAsync();23 Console.WriteLine("Done");24 }25 }26}27GetTraceAsync() method returns a Task of string type. The

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