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How to use StopAsync method of PuppeteerSharp.Tracing class

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

Program.cs

Source:Program.cs

...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;109                            do...

Scrape.cs

Source:Scrape.cs

...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);68                }69                await browser.CloseAsync();70                //Trace71                traces = new TraceHelper().GetTraceData(rawTrace);72                Uri requestUri = new Uri(url);73                string host = requestUri.Host;74                HtmlDocument doc = new HtmlDocument();...

TracingTests.cs

Source:TracingTests.cs

...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}...

Tracing.cs

Source:Tracing.cs

...5using PuppeteerSharp.Messaging;6namespace PuppeteerSharp7{8    /// <summary>9    /// 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.10    /// </summary>11    /// <example>12    /// <code>13    /// await Page.Tracing.StartAsync(new TracingOptions14    /// {15    ///     Screenshots = true,16    ///     Path = _file17    /// });18    /// await Page.GoToAsync(TestConstants.ServerUrl + "/grid.html");19    /// await Page.Tracing.StopAsync();20    /// </code>21    /// </example>22    public class Tracing23    {24        private readonly CDPSession _client;25        private bool _recording;26        private string _path;27        private static readonly List<string> _defaultCategories = new List<string>()28        {29            "-*",30            "devtools.timeline",31            "v8.execute",32            "disabled-by-default-devtools.timeline",33            "disabled-by-default-devtools.timeline.frame",34            "toplevel",35            "blink.console",36            "blink.user_timing",37            "latencyInfo",38            "disabled-by-default-devtools.timeline.stack",39            "disabled-by-default-v8.cpu_profiler"40        };41        internal Tracing(CDPSession client)42        {43            _client = client;44        }45        /// <summary>46        /// Starts tracing.47        /// </summary>48        /// <returns>Start task</returns>49        /// <param name="options">Tracing options</param>50        public async Task StartAsync(TracingOptions options)51        {52            if (_recording)53            {54                throw new InvalidOperationException("Cannot start recording trace while already recording trace.");55            }5657            if (string.IsNullOrEmpty(options.Path))58            {59                throw new ArgumentException("Must specify a path to write trace file to.");60            }616263            var categories = options.Categories ?? _defaultCategories;6465            if (options.Screenshots)66            {67                categories.Add("disabled-by-default-devtools.screenshot");68            }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");98
...

StopAsync

Using AI Code Generation

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            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false }))10            using (var page = await browser.NewPageAsync())11            {12                var client = await page.Target.CreateCDPSessionAsync();13                var tracing = await Tracing.CreateAsync(client);14                await tracing.StartAsync(new TracingOptions { screenshots = true, categories = new string[] { "devtools.timeline" } });15                await tracing.StopAsync(new TracingOptions { path = "trace.json" });16            }17        }18    }19}20Recommended Posts: PuppeteerSharp | PuppeteerSharp.Page.ScreenshotStreamAsync()21PuppeteerSharp | PuppeteerSharp.Page.ScreenshotDataAsync()22PuppeteerSharp | PuppeteerSharp.Page.ScreenshotAsync()23PuppeteerSharp | PuppeteerSharp.Page.ScreenshotAsync()24PuppeteerSharp | PuppeteerSharp.Page.PdfStreamAsync()25PuppeteerSharp | PuppeteerSharp.Page.PdfDataAsync()26PuppeteerSharp | PuppeteerSharp.Page.PdfAsync()27PuppeteerSharp | PuppeteerSharp.Page.PdfAsync()28PuppeteerSharp | PuppeteerSharp.Page.AddScriptTagAsync()29PuppeteerSharp | PuppeteerSharp.Page.AddStyleTagAsync()30PuppeteerSharp | PuppeteerSharp.Page.BringToFrontAsync()31PuppeteerSharp | PuppeteerSharp.Page.ClickAsync()32PuppeteerSharp | PuppeteerSharp.Page.CloseAsync()33PuppeteerSharp | PuppeteerSharp.Page.EvaluateExpressionAsync()34PuppeteerSharp | PuppeteerSharp.Page.EvaluateFunctionAsync()35PuppeteerSharp | PuppeteerSharp.Page.EvaluateFunctionHandleAsync()36PuppeteerSharp | PuppeteerSharp.Page.EvaluateHandleAsync()37PuppeteerSharp | PuppeteerSharp.Page.EvaluateOnNewDocumentAsync()38PuppeteerSharp | PuppeteerSharp.Page.EvaluateOnSelectorAsync()39PuppeteerSharp | PuppeteerSharp.Page.EvaluateOnSelectorAllAsync()40PuppeteerSharp | PuppeteerSharp.Page.FocusAsync()

StopAsync

Using AI Code Generation

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 LaunchOptions { Headless = false });10            var page = await browser.NewPageAsync();11            var client = await page.Target.CreateCDPSessionAsync();12            var tracing = await client.SendAsync("Tracing.start", new { });13            await Task.Delay(5000);14            var result = await client.SendAsync("Tracing.end", new { });15            var trace = result.As<TracingResult>();16            await File.WriteAllBytesAsync("trace.json", trace.Data);17            await browser.CloseAsync();18        }19    }20}21using System;22using System.Threading.Tasks;23using PuppeteerSharp;24{25    {26        static async Task Main(string[] args)27        {28            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);29            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });30            var page = await browser.NewPageAsync();31            var tracing = await page.Tracing.StartAsync(new TracingOptions { Categories = new[] { "devtools.timeline" } });32            await Task.Delay(5000);33            await page.Tracing.StopAsync(new TracingResultOptions { Path = "trace.json" });34            await browser.CloseAsync();35        }36    }37}38using System;39using System.Threading.Tasks;40using PuppeteerSharp;41{42    {43        static async Task Main(string[] args)44        {45            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);46            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });47            var page = await browser.NewPageAsync();48            var tracing = await page.Tracing.StartAsync(new TracingOptions { Categories = new

StopAsync

Using AI Code Generation

1using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions2{3}))4{5    var page = await browser.NewPageAsync();6    var client = await page.Target.CreateCDPSessionAsync();7    await client.SendAsync("Page.startScreencast", new { format = "png", everyNthFrame = 1 });8    await client.SendAsync("Page.enable");9    await client.SendAsync("Page.startScreencast", new { format = "png", everyNthFrame = 1 });10    await page.WaitForSelectorAsync("input[name='q']");11    await page.TypeAsync("input[name='q']", "Puppeteer");12    await page.WaitForTimeoutAsync(5000);13    var tracing = await page.Tracing.StartAsync(new TracingOptions14    {15        Categories = new string[] { "devtools.timeline" }16    });17    await page.ClickAsync("input[name='btnK']");18    await page.WaitForTimeoutAsync(5000);19    await tracing.StopAsync();20    await browser.CloseAsync();21}

StopAsync

Using AI Code Generation

1using System;2using System.Threading.Tasks;3using PuppeteerSharp;4{5    {6        static void Main(string[] args)7        {8            MainAsync().GetAwaiter().GetResult();9        }10        static async Task MainAsync()11        {12            var options = new LaunchOptions { Headless = false };13            using (var browser = await Puppeteer.LaunchAsync(options))14            using (var page = await browser.NewPageAsync())15            {16                var tracing = await page.Tracing.StartAsync(new TracingOptions17                {18                });19                await tracing.StopAsync();20            }21        }22    }23}

StopAsync

Using AI Code Generation

1using PuppeteerSharp;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            Console.WriteLine("Hello World!");9            var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = false });10            var page = await browser.NewPageAsync();11            var tracing = await page.Tracing.StartAsync(new TracingOptions { Path = "trace.json" });12            await tracing.StopAsync();13            await browser.CloseAsync();14            Console.WriteLine("Done");15        }16    }17}

StopAsync

Using AI Code Generation

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            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions10            {11                Args = new string[] { "--no-sandbox" }12            }))13            {14                using (var page = await browser.NewPageAsync())15                {16                    await page.ScreenshotAsync("google.png");17                }18            }19            await Tracing.StopAsync("trace.json");20        }21    }22}23using System;24using System.Threading.Tasks;25using PuppeteerSharp;26{27    {28        static async Task Main(string[] args)29        {30            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);31            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions32            {33                Args = new string[] { "--no-sandbox" }34            }))35            {36                using (var page = await browser.NewPageAsync())37                {38                    await Tracing.StartAsync(new TracingOptions39                    {40                    });41                    await page.ScreenshotAsync("google.png");42                }43            }44            await Tracing.StopAsync();45        }46    }47}48using System;49using System.Threading.Tasks;50using PuppeteerSharp;51{52    {53        static async Task Main(string[] args)54        {55            await new BrowserFetcher().DownloadAsync(BrowserFetcher.DefaultRevision);56            using (var browser = await Puppeteer.LaunchAsync(new LaunchOptions57            {58                Args = new string[] { "--no-sandbox" }59            }))

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