初始化

WebApplication2/Controllers/WeatherForecastController.cs

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+using Microsoft.AspNetCore.Mvc;
+
+namespace WebApplication2.Controllers
+{
+    [ApiController]
+    [Route("[controller]")]
+    public class WeatherForecastController : ControllerBase
+    {
+        private static readonly string[] Summaries = new[]
+        {
+            "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
+        };
+
+        private readonly ILogger<WeatherForecastController> _logger;
+
+        public WeatherForecastController(ILogger<WeatherForecastController> logger)
+        {
+            _logger = logger;
+        }
+
+        [HttpGet]
+        public IEnumerable<WeatherForecast> Get()
+        {
+            return Enumerable.Range(1, 5).Select(index => new WeatherForecast
+            {
+                Date = DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
+                TemperatureC = Random.Shared.Next(-20, 55),
+                Summary = Summaries[Random.Shared.Next(Summaries.Length)]
+            })
+            .ToArray();
+        }
+    }
+}

WebApplication2/Program.cs

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+namespace WebApplication2
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            var builder = WebApplication.CreateBuilder(args);
+
+            // Add services to the container.
+
+            builder.Services.AddControllers();
+
+            var app = builder.Build();
+
+            // Configure the HTTP request pipeline.
+
+            app.UseAuthorization();
+
+
+            app.MapControllers();
+
+            app.Run();
+        }
+    }
+}

WebApplication2/Properties/launchSettings.json

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+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:58914",
+      "sslPort": 0
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "weatherforecast",
+      "applicationUrl": "http://localhost:5082",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "weatherforecast",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

WebApplication2/WeatherForecast.cs

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+namespace WebApplication2
+{
+    public class WeatherForecast
+    {
+        public DateOnly Date { get; set; }
+
+        public int TemperatureC { get; set; }
+
+        public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+
+        public string? Summary { get; set; }
+    }
+}

WebApplication2/WebApplication2.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Confluent.Kafka" Version="2.11.0" />
+  </ItemGroup>
+
+</Project>

WebApplication2/WebApplication2.http

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+@WebApplication2_HostAddress = http://localhost:5082
+
+GET {{WebApplication2_HostAddress}}/weatherforecast/
+Accept: application/json
+
+###

WebApplication2/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

WebApplication2/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

WebApplication2/services/MQServices.cs

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+
+using Confluent.Kafka;
+
+namespace WebApplication2.services
+{
+    public class MQServices : BackgroundService
+    {
+        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+        {
+            var conf = new ConsumerConfig
+            {
+                GroupId = "test-consumer-group",
+                BootstrapServers = "localhost:9092",
+                // Note: The AutoOffsetReset property determines the start offset in the event
+                // there are not yet any committed offsets for the consumer group for the
+                // topic/partitions of interest. By default, offsets are committed
+                // automatically, so in this example, consumption will only start from the
+                // earliest message in the topic 'my-topic' the first time you run the program.
+                AutoOffsetReset = AutoOffsetReset.Earliest
+            };
+
+            using (var c = new ConsumerBuilder<string, string>(conf).Build())
+            {
+                c.Subscribe("test-topic");
+                try
+                {
+                    while (true)
+                    {
+                        try
+                        {
+                            var cr = c.Consume(stoppingToken);
+                            var v= cr.Message.Value;
+                            var k=cr.Message.Key;
+                            Console.WriteLine($"Consumed message '{k} {v}' at: '{cr.TopicPartitionOffset}'.");
+                        }
+                        catch (ConsumeException e)
+                        {
+                            Console.WriteLine($"Error occured: {e.Error.Reason}");
+                        }
+                    }
+                }
+                catch (OperationCanceledException)
+                {
+                    // Ensure the consumer leaves the group cleanly and final offsets are committed.
+                    c.Close();
+                }
+            }
+            await Task.CompletedTask;
+        }
+    }
+}