70 lines
2.8 KiB
C#
70 lines
2.8 KiB
C#
using System;
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using System.Text.Encodings.Web;
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using Microsoft.AspNet.Builder;
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using Microsoft.AspNet.Diagnostics;
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using Microsoft.AspNet.Hosting;
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using Microsoft.AspNet.Http;
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using Microsoft.AspNet.Http.Features;
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namespace ExceptionHandlerSample
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{
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public class Startup
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{
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public void Configure(IApplicationBuilder app)
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{
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// Configure the error handler to show an error page.
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app.UseExceptionHandler(errorApp =>
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{
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// Normally you'd use MVC or similar to render a nice page.
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errorApp.Run(async context =>
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{
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context.Response.StatusCode = 500;
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context.Response.ContentType = "text/html";
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await context.Response.WriteAsync("<html><body>\r\n");
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await context.Response.WriteAsync("We're sorry, we encountered an un-expected issue with your application.<br>\r\n");
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var error = context.Features.Get<IExceptionHandlerFeature>();
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if (error != null)
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{
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// This error would not normally be exposed to the client
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await context.Response.WriteAsync("<br>Error: " + HtmlEncoder.Default.Encode(error.Error.Message) + "<br>\r\n");
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}
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await context.Response.WriteAsync("<br><a href=\"/\">Home</a><br>\r\n");
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await context.Response.WriteAsync("</body></html>\r\n");
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await context.Response.WriteAsync(new string(' ', 512)); // Padding for IE
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});
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});
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// We could also configure it to re-execute the request on the normal pipeline with a different path.
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// app.UseExceptionHandler("/error.html");
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// The broken section of our application.
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app.Map("/throw", throwApp =>
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{
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throwApp.Run(context => { throw new Exception("Application Exception"); });
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});
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app.UseStaticFiles();
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// The home page.
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app.Run(async context =>
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{
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context.Response.ContentType = "text/html";
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await context.Response.WriteAsync("<html><body>Welcome to the sample<br><br>\r\n");
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await context.Response.WriteAsync("Click here to throw an exception: <a href=\"/throw\">throw</a>\r\n");
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await context.Response.WriteAsync("</body></html>\r\n");
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});
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}
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public static void Main(string[] args)
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{
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var application = new WebApplicationBuilder()
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.UseConfiguration(WebApplicationConfiguration.GetDefault(args))
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.UseStartup<Startup>()
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.Build();
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application.Run();
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}
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}
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}
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