79 lines
3.5 KiB
C#
79 lines
3.5 KiB
C#
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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using Microsoft.AspNet.Builder;
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using Microsoft.AspNet.Diagnostics;
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using Microsoft.AspNet.Http;
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namespace StatusCodePagesSample
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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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app.UseErrorPage(ErrorPageOptions.ShowAll);
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app.UseStatusCodePages(new StatusCodePagesOptions() // There is a default response but any of the following can be used to change the behavior.
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// .WithHandler(context => context.HttpContext.Response.SendAsync("Handler, status code: " + context.HttpContext.Response.StatusCode, "text/plain"))
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// .WithResponse("text/plain", "Response, status code: {0}")
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// .WithRedirect("~/errors/{0}") // PathBase relative
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// .WithRedirect("/base/errors/{0}") // Absolute
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// .WithTangent(builder => builder.UseWelcomePage())
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// .WithReExecute("/errors/{0}")
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);
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// "/[?statuscode=400]"
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app.Use((context, next) =>
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{
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if (context.Request.Path.HasValue && !context.Request.Path.Equals(new PathString("/")))
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{
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return next();
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}
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// Check for ?statuscode=400
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var requestedStatusCode = context.Request.Query["statuscode"];
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if (!string.IsNullOrEmpty(requestedStatusCode))
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{
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context.Response.StatusCode = int.Parse(requestedStatusCode);
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return Task.FromResult(0);
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}
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var builder = new StringBuilder();
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builder.AppendLine("<html><body>");
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builder.AppendLine("<a href=\"" +
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WebUtility.HtmlEncode(context.Request.PathBase.ToString()) + "/missingpage/\">" +
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WebUtility.HtmlEncode(context.Request.PathBase.ToString()) + "/missingpage/</a><br>");
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for (int statusCode = 400; statusCode < 600; statusCode++)
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{
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builder.AppendLine("<a href=\"?statuscode=" + statusCode + "\">" + statusCode + "</a><br>");
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}
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builder.AppendLine("</body></html>");
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return context.Response.SendAsync(builder.ToString(), "text/html");
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});
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// "/errors/400"
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app.Use((context, next) =>
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{
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PathString remainder;
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if (context.Request.Path.StartsWithSegments(new PathString("/errors"), out remainder))
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{
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var builder = new StringBuilder();
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builder.AppendLine("<html><body>");
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builder.AppendLine("An error occurred, Status Code: " + WebUtility.HtmlEncode(remainder.ToString().Substring(1)) + "<br>");
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var referrer = context.Request.Headers["referer"];
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if (!string.IsNullOrEmpty(referrer))
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{
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builder.AppendLine("<a href=\"" + WebUtility.HtmlEncode(referrer) + "\">Retry " + WebUtility.HtmlEncode(referrer) + "</a><br>");
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}
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builder.AppendLine("</body></html>");
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return context.Response.SendAsync(builder.ToString(), "text/html");
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}
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return next();
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});
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}
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}
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}
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