HttpListener

CS029_Networking/7.WebListener/.vscode/launch.json

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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": "${workspaceFolder}/bin/Debug/netcoreapp3.1/HttpClientExample.dll",
+            "args": [],
+            "cwd": "${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}"
+        }
+    ]
+}

CS029_Networking/7.WebListener/.vscode/tasks.json

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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"
+        }
+    ]
+}

CS029_Networking/7.WebListener/HttpClientExample.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Server.WebListener" Version="1.1.4" />
+    <PackageReference Include="System.Text.Encoding.CodePages" Version="4.5.1" />
+  </ItemGroup>
+
+</Project>

CS029_Networking/7.WebListener/Program.cs

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+using System;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace HttpListenerExample {
+
+    class Program {
+
+
+        // Chạy một HTTP Server, prefixes example: new string[] { "http://*:8080/" }
+        public static async Task RunWebserverAsync (params string[] prefixes) {
+
+            if (!HttpListener.IsSupported)
+                throw new Exception ("Máy không hỗ trợ HttpListener.");
+
+            if (prefixes == null || prefixes.Length == 0)
+                throw new ArgumentException ("prefixes");
+
+            // Khởi tạo HttpListener
+            HttpListener listener = new HttpListener ();
+
+            foreach (string s in prefixes) {
+                listener.Prefixes.Add (s);
+            }
+            Console.WriteLine ("Server start ...");
+            // Http bắt đầu lắng nghe truy vấn gửi đến
+            listener.Start();
+
+            do {
+
+
+                HttpListenerContext  context = await listener.GetContextAsync();
+                HttpListenerRequest  request  = context.Request;
+                HttpListenerResponse response = context.Response;
+
+                // Refuse connect
+                if (response.StatusCode != 200) 
+                {
+                    Console.WriteLine($"{request.HttpMethod} {request.RawUrl} LỖI {response.StatusCode}");
+                    continue;
+                }
+
+
+                Console.WriteLine($"{request.HttpMethod} {request.RawUrl} from IP {context.Request.RemoteEndPoint.ToString()}");
+
+
+                // Gửi thông tin về cho Client
+                context.Response.Headers.Add ("content-type", "text/html");
+                context.Response.StatusCode = (int) HttpStatusCode.OK;
+                byte[] buffer = GenerateHTMP(context.Request);
+                response.ContentLength64 = buffer.Length;
+                System.IO.Stream output = response.OutputStream;
+                await output.WriteAsync (buffer, 0, buffer.Length);
+
+
+            } while (listener.IsListening);
+
+
+            //  listener.Stop();    
+
+        }
+
+        // Tạo nội dung HTML trả về cho Client (HTML chứa thông tin về Request)
+        public static byte[] GenerateHTMP (HttpListenerRequest request) {
+            string format = @"<!DOCTYPE html>
+                                <html lang=""en""> 
+                                    <head><meta charset=""UTF-8"">{0}</head> 
+                                    <body>{1}</body> 
+                                </html>";
+            string head = "<title>Test WebServer</title>";
+            var body = new StringBuilder ();
+            body.Append ("<h1>Request Info</h1>");
+            body.Append ("<h2>Request Header:</h2>");
+
+            // Header infomation
+            var headers = from key in request.Headers.AllKeys
+            select $"<div>{key} : {string.Join(",", request.Headers.GetValues(key))}</div>";
+            body.Append (string.Join ("", headers));
+
+            //Extract request properties
+            body.Append ("<h2>Request properties:</h2>");
+            var properties = request.GetType ().GetProperties ();
+            foreach (var property in properties) {
+                var name_pro = property.Name;
+                string value_pro;
+                try {
+                    value_pro = property.GetValue (request).ToString ();
+                } catch (Exception e) {
+                    value_pro = e.Message;
+                }
+                body.Append ($"<div>{name_pro} : {value_pro}</div>");
+
+            };
+            string html = string.Format (format, head, body.ToString ());
+            return Encoding.UTF8.GetBytes(html);
+        }
+
+        static async Task Main (string[] args) {
+            await RunWebserverAsync (new string[] { "http://*:8080/" });
+            Console.ReadKey();
+            Console.WriteLine("End");
+        }
+
+    }
+}

CS029_Networking/7.WebListener/test.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+</head>
+<body>
+</body>
+</html>