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在C#中,我們可以使用中間件來處理超時請求。以下是一個簡單的示例,展示了如何優(yōu)雅地處理超時請求:
TimeoutMiddleware
的類,該類將包含我們的超時處理邏輯。using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
public class TimeoutMiddleware
{
private readonly RequestDelegate _next;
private readonly TimeSpan _timeout;
public TimeoutMiddleware(RequestDelegate next, TimeSpan timeout)
{
_next = next;
_timeout = timeout;
}
public async Task InvokeAsync(HttpContext context)
{
using var cts = new CancellationTokenSource();
var task = _next(context);
if (await Task.WhenAny(task, Task.Delay(_timeout, cts.Token)) == task)
{
// The request completed within the timeout period.
cts.Cancel();
await task;
}
else
{
// The request timed out.
context.Response.StatusCode = 408; // Request Timeout
await context.Response.WriteAsync("Request timed out.");
}
}
}
Startup
類中配置中間件。using Microsoft.AspNetCore.Builder;
using System;
public static class TimeoutMiddlewareExtensions
{
public static IApplicationBuilder UseTimeoutMiddleware(this IApplicationBuilder builder, TimeSpan timeout)
{
return builder.UseMiddleware<TimeoutMiddleware>(timeout);
}
}
Startup
類的Configure
方法中配置中間件。using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
// Add your services here...
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
// Configure the timeout middleware with a 5-second timeout.
app.UseTimeoutMiddleware(TimeSpan.FromSeconds(5));
// Add your other middleware and endpoints here...
}
}
現(xiàn)在,當(dāng)請求超過5秒未完成時,中間件將返回一個408 Request Timeout狀態(tài)碼。你可以根據(jù)需要調(diào)整超時時間。
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