diff --git a/FastGithub/GithubHostedService.cs b/FastGithub/GithubHostedService.cs
index 7067d44..79cb597 100644
--- a/FastGithub/GithubHostedService.cs
+++ b/FastGithub/GithubHostedService.cs
@@ -1,74 +1,29 @@
-using FastGithub.Middlewares;
-using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 
 namespace FastGithub
 {
-    sealed class GithubHostedService : BackgroundService
+    sealed class GithubHostedService : IHostedService
     {
-        private readonly GithubDelegate githubDelegate;
         private readonly IServiceScopeFactory serviceScopeFactory;
-        private readonly ILogger<GithubHostedService> logger;
 
-        public GithubHostedService(
-            IServiceProvider appServiceProvider,
-            IServiceScopeFactory serviceScopeFactory,
-            ILogger<GithubHostedService> logger)
+        public GithubHostedService(IServiceScopeFactory serviceScopeFactory)
         {
-            this.githubDelegate = new GithubBuilder(appServiceProvider, ctx => Task.CompletedTask)
-                .Use<ConcurrentMiddleware>()
-                .Use<PortScanMiddleware>()
-                .Use<HttpTestMiddleware>()
-                .Build();
-
             this.serviceScopeFactory = serviceScopeFactory;
-            this.logger = logger;
         }
 
-        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+        public Task StartAsync(CancellationToken cancellationToken)
         {
-            using var scope = this.serviceScopeFactory.CreateScope();
-            var metaService = scope.ServiceProvider.GetRequiredService<MetaService>();
+            var scope = this.serviceScopeFactory.CreateScope();
+            var service = scope.ServiceProvider.GetRequiredService<GithubService>();
+            return service.ScanAddressAsync(cancellationToken);
+        }
 
-            var meta = await metaService.GetMetaAsync();
-
-            if (meta != null)
-            {
-                var contexts = new List<GithubContext>();
-                var tasks = this.GetScanTasks(meta, contexts);
-                await Task.WhenAll(tasks);
-
-                var orderByContexts = contexts
-                    .Where(item => item.HttpElapsed != null)
-                    .OrderBy(item => item.HttpElapsed);
-
-                foreach (var context in orderByContexts)
-                {
-                    this.logger.LogInformation($"{context.Address} {context.HttpElapsed}");
-                }
-            }
-
-            this.logger.LogInformation("扫描结束");
-        } 
-
-
-        private IEnumerable<Task> GetScanTasks(Meta meta, IList<GithubContext> contexts)
+        public Task StopAsync(CancellationToken cancellationToken)
         {
-            foreach (var address in meta.ToIPv4Address())
-            {
-                var context = new GithubContext
-                {
-                    Address = address,
-                };
-                contexts.Add(context);
-                yield return this.githubDelegate(context);
-            }
+            return Task.CompletedTask;
         }
     }
 }
diff --git a/FastGithub/MetaService.cs b/FastGithub/GithubMetaService.cs
similarity index 73%
rename from FastGithub/MetaService.cs
rename to FastGithub/GithubMetaService.cs
index 646dcd0..fd7911c 100644
--- a/FastGithub/MetaService.cs
+++ b/FastGithub/GithubMetaService.cs
@@ -3,32 +3,33 @@ using Microsoft.Extensions.Options;
 using System;
 using System.Net.Http;
 using System.Net.Http.Json;
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace FastGithub
 {
-    sealed class MetaService
+    sealed class GithubMetaService
     {
         private readonly IHttpClientFactory httpClientFactory;
         private readonly IOptionsMonitor<GithubOptions> options;
-        private readonly ILogger<MetaService> logger;
+        private readonly ILogger<GithubMetaService> logger;
 
-        public MetaService(
+        public GithubMetaService(
             IHttpClientFactory httpClientFactory,
             IOptionsMonitor<GithubOptions> options,
-            ILogger<MetaService> logger)
+            ILogger<GithubMetaService> logger)
         {
             this.httpClientFactory = httpClientFactory;
             this.options = options;
             this.logger = logger;
         }
 
-        public async Task<Meta?> GetMetaAsync()
+        public async Task<Meta?> GetMetaAsync(CancellationToken cancellationToken = default)
         {
             try
             {
                 var httpClient = this.httpClientFactory.CreateClient();
-                return await httpClient.GetFromJsonAsync<Meta>(this.options.CurrentValue.MetaUri);
+                return await httpClient.GetFromJsonAsync<Meta>(this.options.CurrentValue.MetaUri, cancellationToken);
             }
             catch (Exception ex)
             {
diff --git a/FastGithub/GithubService.cs b/FastGithub/GithubService.cs
new file mode 100644
index 0000000..fbad549
--- /dev/null
+++ b/FastGithub/GithubService.cs
@@ -0,0 +1,61 @@
+using Microsoft.Extensions.Logging;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FastGithub
+{
+    sealed class GithubService
+    {
+        private readonly GithubMetaService githubMetaService;
+        private readonly GithubDelegate githubDelegate;
+        private readonly ILogger<GithubService> logger;
+
+        public GithubService(
+            GithubMetaService githubMetaService,
+            GithubDelegate githubDelegate,
+            ILogger<GithubService> logger)
+        {
+            this.githubMetaService = githubMetaService;
+            this.githubDelegate = githubDelegate;
+            this.logger = logger;
+        }
+
+        public async Task ScanAddressAsync(CancellationToken cancellationToken = default)
+        {
+            var meta = await this.githubMetaService.GetMetaAsync(cancellationToken);
+            if (meta != null)
+            {
+                var contexts = new List<GithubContext>();
+                var scanTasks = this.GetMetaScanTasks(meta, contexts);
+                await Task.WhenAll(scanTasks);
+
+                var sortedContexts = contexts
+                    .Where(item => item.HttpElapsed != null)
+                    .OrderBy(item => item.HttpElapsed);
+
+                foreach (var context in sortedContexts)
+                {
+                    this.logger.LogInformation($"{context.Address} {context.HttpElapsed}");
+                }
+            }
+
+            this.logger.LogInformation("扫描结束");
+        }
+
+
+        private IEnumerable<Task> GetMetaScanTasks(Meta meta, IList<GithubContext> contexts)
+        {
+            foreach (var address in meta.ToIPv4Address())
+            {
+                var context = new GithubContext
+                {
+                    Address = address,
+                };
+                contexts.Add(context);
+                yield return this.githubDelegate(context);
+            }
+        }
+    }
+}
diff --git a/FastGithub/Program.cs b/FastGithub/Program.cs
index 0f821fa..9c08ae8 100644
--- a/FastGithub/Program.cs
+++ b/FastGithub/Program.cs
@@ -1,6 +1,7 @@
 using FastGithub.Middlewares;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
+using System.Threading.Tasks;
 
 namespace FastGithub
 {
@@ -29,10 +30,20 @@ namespace FastGithub
                     services
                         .Configure<GithubOptions>(ctx.Configuration.GetSection("Github"))
                         .AddHttpClient()
-                        .AddTransient<MetaService>()
+                        .AddTransient<GithubMetaService>()
+                        .AddTransient<GithubService>()
+
                         .AddSingleton<PortScanMiddleware>()
                         .AddSingleton<HttpTestMiddleware>()
                         .AddSingleton<ConcurrentMiddleware>()
+                        .AddSingleton(serviceProvider =>
+                        {
+                            return new GithubBuilder(serviceProvider, ctx => Task.CompletedTask)
+                                .Use<ConcurrentMiddleware>()
+                                .Use<PortScanMiddleware>()
+                                .Use<HttpTestMiddleware>()
+                                .Build();
+                        })
                         .AddHostedService<GithubHostedService>()
                         ;
                 });