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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Net.Http.Formatting;
using System.Net.Http.Headers;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using Xunit;
using Xunit.Extensions;
namespace System.Web.Http.ExceptionHandling
{
public class HttpResponseExceptionTest
{
[Theory]
[InlineData("DoNotThrow")]
[InlineData("ActionMethod")]
// TODO : 332683 - HttpResponseExceptions in message handlers
//[InlineData("RequestMessageHandler")]
//[InlineData("ResponseMessageHandler")]
[InlineData("RequestAuthorization")]
[InlineData("BeforeActionExecuted")]
[InlineData("AfterActionExecuted")]
[InlineData("ContentNegotiatorNegotiate")]
[InlineData("ActionMethodAndExceptionFilter")]
[InlineData("MediaTypeFormatterReadFromStreamAsync")]
public void HttpResponseExceptionWithExplicitStatusCode(string throwAt)
{
HttpRequestMessage request = new HttpRequestMessage();
request.RequestUri = new Uri(ScenarioHelper.BaseAddress + "/ExceptionTests/ReturnString");
request.Method = HttpMethod.Post;
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
request.Content = new StringContent("\"" + throwAt + "\"", Encoding.UTF8, "application/json");
ScenarioHelper.RunTest(
"ExceptionTests",
"/{action}",
request,
response =>
{
Assert.NotNull(response.Content);
Assert.NotNull(response.Content.Headers.ContentType);
Assert.Equal(response.Content.Headers.ContentType.MediaType, "application/json");
if (throwAt == "DoNotThrow")
{
Assert.Equal(HttpStatusCode.OK, response.StatusCode);
Assert.Equal("Hello World!", response.Content.ReadAsAsync<string>(new List<MediaTypeFormatter>() { new JsonMediaTypeFormatter() }).Result);
}
else
{
Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
Assert.Equal(String.Format("Error at {0}", throwAt),
response.Content.ReadAsAsync<string>(new List<MediaTypeFormatter>() { new JsonMediaTypeFormatter() }).Result);
}
},
config =>
{
config.Services.Replace(typeof(IContentNegotiator), new CustomContentNegotiator(throwAt));
config.MessageHandlers.Add(new CustomMessageHandler(throwAt));
config.Filters.Add(new CustomActionFilterAttribute(throwAt));
config.Filters.Add(new CustomAuthorizationFilterAttribute(throwAt));
config.Filters.Add(new CustomExceptionFilterAttribute(throwAt));
config.Formatters.Clear();
config.Formatters.Add(new CustomJsonMediaTypeFormatter(throwAt));
}
);
}
}
public class CustomMessageHandler : DelegatingHandler
{
private string _throwAt;
public CustomMessageHandler(string throwAt)
{
_throwAt = throwAt;
}
protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "RequestMessageHandler");
return base.SendAsync(request, cancellationToken).ContinueWith<HttpResponseMessage>((tsk) =>
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "ResponseMessageHandler");
HttpResponseMessage response = tsk.Result;
return response;
});
}
}
public class ExceptionTestsController : ApiController
{
[HttpPost]
public string ReturnString([FromBody] string throwAt)
{
string message = "Hello World!";
// check if the test wants to throw from here
ExceptionTestsUtility.CheckForThrow(throwAt, "ActionMethod");
// NOTE: this indicates that we want to throw from here & after this gets intercepted
// by the ExceptionFilter, we want to throw from there too
ExceptionTestsUtility.CheckForThrow(throwAt, "ActionMethodAndExceptionFilter");
return message;
}
}
public class CustomAuthorizationFilterAttribute : AuthorizationFilterAttribute
{
private string _throwAt;
public CustomAuthorizationFilterAttribute(string throwAt)
{
_throwAt = throwAt;
}
public override void OnAuthorization(HttpActionContext context)
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "RequestAuthorization");
}
}
public class CustomActionFilterAttribute : ActionFilterAttribute
{
private string _throwAt;
public CustomActionFilterAttribute(string throwAt)
{
_throwAt = throwAt;
}
public override void OnActionExecuting(HttpActionContext context)
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "BeforeActionExecuted");
}
public override void OnActionExecuted(HttpActionExecutedContext context)
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "AfterActionExecuted");
}
}
public class CustomExceptionFilterAttribute : ExceptionFilterAttribute
{
private string _throwAt;
public CustomExceptionFilterAttribute(string throwAt)
{
_throwAt = throwAt;
}
public override void OnException(HttpActionExecutedContext context)
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "ActionMethodAndExceptionFilter");
}
}
public class CustomContentNegotiator : System.Net.Http.Formatting.DefaultContentNegotiator
{
private string _throwAt;
public CustomContentNegotiator(string throwAt)
{
_throwAt = throwAt;
}
public override ContentNegotiationResult Negotiate(Type type, HttpRequestMessage request, IEnumerable<MediaTypeFormatter> formatters)
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "ContentNegotiatorNegotiate");
return base.Negotiate(type, request, formatters);
}
}
public class CustomJsonMediaTypeFormatter : JsonMediaTypeFormatter
{
private string _throwAt;
public CustomJsonMediaTypeFormatter(string throwAt)
{
_throwAt = throwAt;
}
public override Task<object> ReadFromStreamAsync(Type type, Stream stream, HttpContentHeaders contentHeaders, IFormatterLogger formatterLogger)
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "MediaTypeFormatterReadFromStreamAsync");
return base.ReadFromStreamAsync(type, stream, contentHeaders, formatterLogger);
}
public override Task WriteToStreamAsync(Type type, object value, Stream stream, HttpContentHeaders contentHeaders, TransportContext transportContext)
{
ExceptionTestsUtility.CheckForThrow(_throwAt, "MediaTypeFormatterWriteToStreamAsync");
return base.WriteToStreamAsync(type, value, stream, contentHeaders, transportContext);
}
}
public static class ExceptionTestsUtility
{
public static void CheckForThrow(string throwAt, string stage)
{
if (throwAt == stage)
{
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.NotFound)
{
Content = new ObjectContent<string>(String.Format("Error at {0}", stage), new JsonMediaTypeFormatter())
};
throw new HttpResponseException(response);
}
}
}
}
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