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How to use ReadAsync method of Microsoft.Playwright.Transport.Channels.StreamChannel class

Best Playwright-dotnet code snippet using Microsoft.Playwright.Transport.Channels.StreamChannel.ReadAsync

Stream.cs

Source:Stream.cs

...38        ChannelBase IChannelOwner.Channel => Channel;39        IChannel<Stream> IChannelOwner<Stream>.Channel => Channel;40        public StreamChannel Channel { get; }41        public StreamImpl StreamImpl => new(this);42        public Task<byte[]> ReadAsync(int size) => Channel.ReadAsync(size);43        public ValueTask DisposeAsync() => new ValueTask(CloseAsync());44        public Task CloseAsync() => Channel.CloseAsync();45    }46    internal class StreamImpl : System.IO.Stream47    {48        private readonly Stream _stream;49        internal StreamImpl(Stream stream)50        {51            _stream = stream;52        }53        public override bool CanRead => true;54        public override bool CanSeek => false;55        public override bool CanWrite => throw new NotImplementedException();56        public override long Length => throw new NotImplementedException();57        public override long Position { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }58        public override void Flush() => throw new NotImplementedException();59        public override int Read(byte[] buffer, int offset, int count) => throw new NotImplementedException();60        public override async Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)61        {62            var result = await _stream.ReadAsync(count).ConfigureAwait(false);63            result.CopyTo(buffer, offset);64            return result.Length;65        }66        public override void Close() => _stream.CloseAsync().ConfigureAwait(false);67        public override long Seek(long offset, SeekOrigin origin) => throw new NotImplementedException();68        public override void SetLength(long value) => throw new NotImplementedException();69        public override void Write(byte[] buffer, int offset, int count) => throw new NotImplementedException();70    }71}...

StreamChannel.cs

Source:StreamChannel.cs

...30    {31        public StreamChannel(string guid, Connection connection, Stream owner) : base(guid, connection, owner)32        {33        }34        internal async Task<byte[]> ReadAsync(int size)35        {36            var response = await Connection.SendMessageToServerAsync(37                Guid,38                "read",39                new Dictionary<string, object>40                {41                    ["size"] = size,42                }).ConfigureAwait(false);43            return response.Value.GetProperty("binary").GetBytesFromBase64();44        }45        internal Task CloseAsync() => Connection.SendMessageToServerAsync(Guid, "close", null);46    }47}...

ReadAsync

Using AI Code Generation

1using System;2using System.IO;3using System.Threading.Tasks;4using Microsoft.Playwright;5{6    {7        static async Task Main(string[] args)8        {9            using var playwright = await Playwright.CreateAsync();10            var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions11            {12            });13            var context = await browser.NewContextAsync();14            var page = await context.NewPageAsync();15            var stream = await response.BodyAsync();16            var buffer = new byte[1024];17            using var file = File.Create("test.txt");18            while (true)19            {20                var bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);21                if (bytesRead == 0)22                    break;23                await file.WriteAsync(buffer, 0, bytesRead);24            }25            await file.FlushAsync();26            Console.WriteLine("Done");27        }28    }29}

ReadAsync

Using AI Code Generation

1using System;2using System.IO;3using System.Threading.Tasks;4using Microsoft.Playwright;5{6    {7        static async Task Main(string[] args)8        {9            await using var playwright = await Playwright.CreateAsync();10            await using var browser = await playwright.Chromium.LaunchAsync();11            var page = await browser.NewPageAsync();12            var stream = await response.BodyAsync();13            var buffer = new byte[1000];14            var count = await stream.ReadAsync(buffer, 0, 1000);15            Console.WriteLine($"Read {count} bytes");16            Console.WriteLine($"Data: {System.Text.Encoding.UTF8.GetString(buffer)}");17        }18    }19}20          var dataLayer = [];21          dataLayer.push({'gtm.start':22                          new Date().getTime(),event:'gtm.js'});23        })();24      </script><script nonce="q3e/4Z4iQsUHc6U4Q9iK8g==">(function(){

ReadAsync

Using AI Code Generation

1using Microsoft.Playwright;2using System;3using System.Threading.Tasks;4{5    {6        static async Task Main(string[] args)7        {8            using var playwright = await Playwright.CreateAsync();9            using var browser = await playwright.Chromium.LaunchAsync();10            var context = await browser.NewContextAsync();11            var page = await context.NewPageAsync();12            var element = await page.QuerySelectorAsync("input[name=q]");13            await element.FocusAsync();14            await element.TypeAsync("Hello World");15            await page.Keyboard.PressAsync("Enter");16            await page.WaitForSelectorAsync("div#result-stats");17            var resultStats = await page.QuerySelectorAsync("div#result-stats");18            var resultText = await resultStats.TextContentAsync();19            Console.WriteLine(resultText);20        }21    }22}23About 10,000,000 results (0.58 seconds)24using Microsoft.Playwright;25using System;26using System.Threading.Tasks;27{28    {29        static async Task Main(string[] args)30        {31            using var playwright = await Playwright.CreateAsync();32            using var browser = await playwright.Chromium.LaunchAsync();33            var context = await browser.NewContextAsync();34            var page = await context.NewPageAsync();35            var element = await page.QuerySelectorAsync("input[name=q]");36            await element.FocusAsync();37            await element.TypeAsync("Hello World");38            await page.Keyboard.PressAsync("Enter");39            await page.WaitForSelectorAsync("div#result-stats");40            var resultStats = await page.QuerySelectorAsync("div#result-stats");41            var resultText = await resultStats.TextContentAsync();42            Console.WriteLine(resultText);43            var screenshot = await page.ScreenshotAsync();44            using var stream = screenshot.CreateReadStream();45            var buffer = new byte[stream.Length];46            await stream.ReadAsync(buffer, 0, (int)stream.Length);

ReadAsync

Using AI Code Generation

1using System;2using System.IO;3using System.Threading.Tasks;4using Microsoft.Playwright;5using Microsoft.Playwright.Transport.Channels;6{7    {8        static async Task Main(string[] args)9        {10            using var playwright = await Playwright.CreateAsync();11            var browser = await playwright.Chromium.LaunchAsync();12            var page = await browser.NewPageAsync();13            var request = await page.WaitForRequestAsync("**/*");14            var response = request.Response;15            var stream = await response.BodyAsync();16            var streamChannel = stream as StreamChannel;17            var streamReader = new StreamReader(streamChannel.ReadAsync());18            var content = await streamReader.ReadToEndAsync();19            Console.WriteLine(content);20        }21    }22}23using System;24using System.IO;25using System.Threading.Tasks;26using Microsoft.Playwright;27using Microsoft.Playwright.Transport.Channels;28{29    {30        static async Task Main(string[] args)31        {32            using var playwright = await Playwright.CreateAsync();33            var browser = await playwright.Chromium.LaunchAsync();34            var page = await browser.NewPageAsync();35            var request = await page.WaitForRequestAsync("**/*");36            var response = request.Response;37            var stream = await response.BodyAsync();38            var streamChannel = stream as StreamChannel;39            var streamReader = new StreamReader(streamChannel.ReadAsync());40            var content = await streamReader.ReadToEndAsync();41            Console.WriteLine(content);42        }43    }44}45using System;46using System.IO;47using System.Threading.Tasks;48using Microsoft.Playwright;49using Microsoft.Playwright.Transport.Channels;50{51    {52        static async Task Main(string[] args)53        {54            using var playwright = await Playwright.CreateAsync();55            var browser = await playwright.Chromium.LaunchAsync();56            var page = await browser.NewPageAsync();57            var request = await page.WaitForRequestAsync("**/*");58            var response = request.Response;

ReadAsync

Using AI Code Generation

1using System;2using System.IO;3using System.Threading;4using System.Threading.Tasks;5{6    {7        static async Task Main(string[] args)8        {9            var playwright = await Microsoft.Playwright.Playwright.CreateAsync();10            var browser = await playwright.Chromium.LaunchAsync();11            var context = await browser.NewContextAsync();12            var page = await context.NewPageAsync();13            var element = await page.QuerySelectorAsync("input[name=q]");14            await element.TypeAsync("Hello World");15            var stream = await element.ScreenshotStreamAsync();16            await stream.ReadAsync(new byte[1000], 0, 1000);17            await browser.CloseAsync();18            await playwright.StopAsync();19        }20    }21}22   at System.IO.Strategies.FileStreamHelpers.ValidateFileHandle(SafeFileHandle fileHandle, String path, Boolean useAsyncIO)23   at System.IO.Strategies.WindowsFileStreamStrategy.SeekCore(SafeFileHandle fileHandle, Int64 offset, SeekOrigin origin, Boolean useAsyncIO)24   at System.IO.Strategies.WindowsFileStreamStrategy.SeekCore(Int64 offset, SeekOrigin origin)25   at System.IO.Strategies.Net5CompatFileStreamStrategy.SeekCore(Int64 offset, SeekOrigin origin)26   at System.IO.Strategies.FileStreamHelpers.SeekHelper(Stream stream, Int64 offset, SeekOrigin origin, Boolean checkArguments)27   at System.IO.Stream.ReadAsync(Byte[] buffer, Int32 offset, Int32 count, CancellationToken cancellationToken)28   at ConsoleApp1.Program.Main(String[] args) in C:\Users\user1\source\repos\ConsoleApp1\ConsoleApp1\Program.cs:line 2629var stream = await element.ScreenshotStreamAsync();30using (var fileStream = new FileStream(@"C:\Temp\test.png", FileMode.OpenOrCreate))31{32    await stream.CopyToAsync(fileStream);33}34.NET SDK (reflecting any global.json):

ReadAsync

Using AI Code Generation

1var stream = await page.EvaluateAsync<Microsoft.Playwright.Transport.Channels.StreamChannel>(@"() => {2}");3var readResult = await stream.ReadAsync();4var buffer = readResult.Buffer;5var isEOF = readResult.EOF;6var stream = await page.EvaluateAsync<Microsoft.Playwright.Transport.Channels.StreamChannel>(@"() => {7}");8var readResult = await stream.ReadAsync();9var buffer = readResult.Buffer;10var isEOF = readResult.EOF;11var stream = await page.EvaluateAsync<Microsoft.Playwright.Transport.Channels.StreamChannel>(@"() => {12}");13var readResult = await stream.ReadAsync();14var buffer = readResult.Buffer;15var isEOF = readResult.EOF;16var stream = await page.EvaluateAsync<Microsoft.Playwright.Transport.Channels.StreamChannel>(@"() => {17}");18var readResult = await stream.ReadAsync();19var buffer = readResult.Buffer;20var isEOF = readResult.EOF;21var stream = await page.EvaluateAsync<Microsoft.Playwright.Transport.Channels.StreamChannel>(@"() => {22}");23var readResult = await stream.ReadAsync();24var buffer = readResult.Buffer;25var isEOF = readResult.EOF;26var stream = await page.EvaluateAsync<Microsoft.Playwright.Transport.Channels.StreamChannel>(@"() => {27}");28var readResult = await stream.ReadAsync();29var buffer = readResult.Buffer;30var isEOF = readResult.EOF;

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
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What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
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