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XuanThuLab
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{ | ||
// Use IntelliSense to find out which attributes exist for C# debugging | ||
// Use hover for the description of the existing attributes | ||
// For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md | ||
"version": "0.2.0", | ||
"configurations": [ | ||
{ | ||
"name": ".NET Core Launch (console)", | ||
"type": "coreclr", | ||
"request": "launch", | ||
"preLaunchTask": "build", | ||
// If you have changed target frameworks, make sure to update the program path. | ||
"program": "${workspaceFolder}/bin/Debug/netcoreapp2.1/HttpClientExample.dll", | ||
"args": [], | ||
"cwd": "${workspaceFolder}", | ||
// For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console | ||
"console": "internalConsole", | ||
"stopAtEntry": false | ||
}, | ||
{ | ||
"name": ".NET Core Attach", | ||
"type": "coreclr", | ||
"request": "attach", | ||
"processId": "${command:pickProcess}" | ||
} | ||
] | ||
} |
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{ | ||
"version": "2.0.0", | ||
"tasks": [ | ||
{ | ||
"label": "build", | ||
"command": "dotnet", | ||
"type": "process", | ||
"args": [ | ||
"build", | ||
"${workspaceFolder}/HttpClientExample.csproj", | ||
"/property:GenerateFullPaths=true", | ||
"/consoleloggerparameters:NoSummary" | ||
], | ||
"problemMatcher": "$msCompile" | ||
}, | ||
{ | ||
"label": "publish", | ||
"command": "dotnet", | ||
"type": "process", | ||
"args": [ | ||
"publish", | ||
"${workspaceFolder}/HttpClientExample.csproj", | ||
"/property:GenerateFullPaths=true", | ||
"/consoleloggerparameters:NoSummary" | ||
], | ||
"problemMatcher": "$msCompile" | ||
}, | ||
{ | ||
"label": "watch", | ||
"command": "dotnet", | ||
"type": "process", | ||
"args": [ | ||
"watch", | ||
"run", | ||
"${workspaceFolder}/HttpClientExample.csproj", | ||
"/property:GenerateFullPaths=true", | ||
"/consoleloggerparameters:NoSummary" | ||
], | ||
"problemMatcher": "$msCompile" | ||
} | ||
] | ||
} |
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<Project Sdk="Microsoft.NET.Sdk"> | ||
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<PropertyGroup> | ||
<OutputType>Exe</OutputType> | ||
<TargetFramework>netcoreapp2.1</TargetFramework> | ||
</PropertyGroup> | ||
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<ItemGroup> | ||
<PackageReference Include="Microsoft.AspNetCore.Server.WebListener" Version="1.1.4" /> | ||
<PackageReference Include="System.Text.Encoding.CodePages" Version="4.5.1" /> | ||
</ItemGroup> | ||
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</Project> |
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using System; | ||
using System.Linq; | ||
using System.Net; | ||
using System.Threading.Tasks; | ||
using System.Text; | ||
using System.Net.Sockets; | ||
using System.Net.Http; | ||
using System.IO; | ||
using System.Net.Security; | ||
using System.Security.Cryptography.X509Certificates; | ||
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namespace TCP | ||
{ | ||
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class Program | ||
{ | ||
// Phương thức này gọi bởi RemoteCertificateValidationDelegate trong quá trình xác thức SSL | ||
// chỉ dùng khi kết nối HTTPS | ||
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public static bool ValidateServerCertificate( | ||
object sender, | ||
X509Certificate certificate, | ||
X509Chain chain, | ||
SslPolicyErrors sslPolicyErrors) | ||
{ | ||
Console.WriteLine("ValidateServerCertificate"); | ||
if (sslPolicyErrors == SslPolicyErrors.None) return true; | ||
Console.WriteLine("Certificate error: {0}", sslPolicyErrors); | ||
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// Do not allow this client to communicate with unauthenticated servers. | ||
return false; | ||
} | ||
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// Kết nối đến server Tpc bằng TcpClient, đọc nội dung trả về | ||
public static async Task ReadHtmlAsync(string url) { | ||
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using (var client = new TcpClient()) | ||
{ | ||
Console.WriteLine($"Start get {url}"); | ||
Uri uri = new Uri(url); | ||
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var hostAdress = await Dns.GetHostAddressesAsync(uri.Host); | ||
IPAddress ipaddrress = hostAdress[0]; | ||
Console.WriteLine($"Host: {uri.Host}, IP: {ipaddrress}:{uri.Port}"); | ||
await client.ConnectAsync(ipaddrress.MapToIPv4(), uri.Port); | ||
Console.WriteLine("Connected"); | ||
Console.WriteLine(); | ||
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Stream stream; | ||
if (uri.Scheme == "https") | ||
{ | ||
// SslStream | ||
stream = new SslStream(client.GetStream(),false, | ||
new RemoteCertificateValidationCallback (ValidateServerCertificate), | ||
null); | ||
(stream as SslStream).AuthenticateAsClient(uri.Host); | ||
} | ||
else { | ||
// NetworkStream | ||
stream = client.GetStream(); | ||
} | ||
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Console.WriteLine($"Get Stream OK: {stream.GetType().Name}"); | ||
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// Xem: /psr-7-chuan-giao-dien-thong-diep-http.html#HTTPRequest | ||
StringBuilder header = new StringBuilder(); | ||
header.Append($"GET {uri.PathAndQuery} HTTP/1.1\r\n"); | ||
// header.Append($"GET {uri.PathAndQuery} HTTP/2\r\n"); | ||
header.Append($"Host: {uri.Host}\r\n"); | ||
header.Append($"\r\n"); | ||
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Console.WriteLine("Request:"); | ||
Console.WriteLine(header); | ||
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byte[] bsend = Encoding.UTF8.GetBytes(header.ToString()); | ||
await stream.WriteAsync(bsend, 0, bsend.Length); | ||
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await stream.FlushAsync(); | ||
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Console.WriteLine("Send Message OK"); | ||
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var ms = new MemoryStream(); | ||
byte [] buffer = new byte[255]; | ||
int bytes = -1; | ||
do | ||
{ | ||
bytes = await stream.ReadAsync(buffer, 0, buffer.Length); | ||
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// Lưu dữ liệu tải về vào ms | ||
ms.Write(buffer, 0, bytes); | ||
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Array.Clear(buffer, 0, buffer.Length); | ||
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} while (bytes != 0); | ||
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Console.WriteLine($"Read OK"); | ||
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ms.Seek(0, SeekOrigin.Begin); | ||
var reader = new StreamReader(ms); | ||
string html = reader.ReadToEnd(); | ||
Console.WriteLine("Response:"); | ||
Console.WriteLine(html); | ||
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} | ||
} | ||
static async Task Main(string[] args) | ||
{ | ||
string url = "https://google.com.vn"; | ||
await ReadHtmlAsync(url); | ||
} | ||
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} | ||
} |