Csharp 如何创建ASP.NET Core主机并在同一进程中运行请求

发布于04月08日

如何承载ASP.NET Core Web应用程序并对其运行请求？我试过了，但显然Thread.Sleep(1000);不是一条路要走.

var builder = WebApplication.CreateBuilder();
builder.Services.AddControllers();

var app = builder.Build();

app.Urls.Add(BaseAddress);
app.UseRouting();

app.MapControllers().AddApplicationPart(assemblyUnderTest);

Task.Run(() => app.Run());

Thread.Sleep(1000); // better solution needed.

var client = new HttpClient();
var response = client.GetAsync(BaseAddress + "/subpath/key").Result;
Console.WriteLine(response);
Console.WriteLine(response.Content.ReadAsStringAsync().Result);

推荐答案

正如我在 comments 部分指出的，有一个叫做ApplicationStarted的钩子，它通过IHostApplicationLifetimeexpose 出来.这个钩子是一个CancellationToken，所以，你可以使用Register function来执行一个自定义代码，当它发出信号时.不幸的是，它不支持异步代码.

下面是一个工作示例，如何在应用程序启动后向其发出请求:

using Microsoft.AspNetCore.Hosting.Server;
using Microsoft.AspNetCore.Hosting.Server.Features;

var builder = WebApplication.CreateBuilder();
var app = builder.Build();
app.MapGet("/test", () => "Test");

Task.Run(() => app.Run());

IHostApplicationLifetime lifetime = app.Lifetime;
lifetime.ApplicationStarted.Register(() =>
{
    var server = app.Services.GetService<IServer>();
    var addressesFeature = server?.Features.Get<IServerAddressesFeature>();
    var baseAddress = addressesFeature?.Addresses.FirstOrDefault(); 
    
    var client = new HttpClient();
    var response = client.GetAsync($"{baseAddress}/test").Result;
    Console.WriteLine(response.Content.ReadAsStringAsync().Result); //Test
});

Console.ReadLine();

这是一个工作dotnet fiddle.请注意This is only required in dotnet fiddle comments