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