public override void OnException(HttpActionExecutedContext context)
{
var exception = context.Exception as MorpherException ?? new ServerException(context.Exception);
var format = context.Request.GetQueryString("format");
if (format == null)
{
format = context.Request.GetHeader("ContentType");
if (format == null)
{
format = "xml";
}
else if (format.Contains("application/json"))
{
format = "json";
}
else if (format.Contains("application/xml"))
{
format = "xml";
}
}
var response = new ServiceErrorMessage(exception);
context.Response = new HttpResponseMessage(HttpStatusCode.BadRequest);
if (!context.Response.Headers.Contains("Error-Code"))
{
context.Response.Headers.Add("Error-Code", new[] { response.Code.ToString() });
context.Response.StatusCode = exception.ResponseCode;
}
switch (format)
{
case "json":
context.Response.Content =
new StringContent(
JsonConvert.SerializeObject(response, Formatting.Indented));
break;
case "xml":
default:
DataContractSerializer contractSerializer = new DataContractSerializer(typeof(ServiceErrorMessage));
// Если писать поток в StreamContent ничего не выводит
// Если из ByteArray то кривая кодировка.
using (StringWriter stringWriter = new StringWriter())
{
using (XmlTextWriter textWriter =
new XmlTextWriter(stringWriter))
{
textWriter.Formatting = System.Xml.Formatting.Indented;
contractSerializer.WriteObject(textWriter, response);
context.Response.Content = new StringContent(stringWriter.GetStringBuilder().ToString());
}
}
break;
}
}
public override async Task Invoke(IOwinContext context)
{
string method = $"{context.Request.Method.ToLowerInvariant()}:{context.Request.Path.ToString().ToLowerInvariant()}";
if (_attributeUrls.Urls.TryGetValue(method, out _throttleThisAttribute))
{
ApiThrottlingResult result;
switch (_throttleThisAttribute.Mode)
{
case TarificationMode.PerRequest:
result = _apiThrottler.Throttle(context.Request, _throttleThisAttribute.Cost);
break;
case TarificationMode.PerSymbol:
result = PerSymbol(context.Request);
break;
case TarificationMode.PerWord:
result = PerWord(context.Request);
break;
default:
throw new ArgumentOutOfRangeException();
}
if (result != ApiThrottlingResult.Success)
{
var exception = result.GenerateMorpherException();
var response = new ServiceErrorMessage(exception);
context.Response.StatusCode = (int)exception.ResponseCode;
var format = context.Request.Query.Get("format") ?? context.Request.Headers.Get("Accept");
if (format == null)
{
format = "xml";
}
else if (format.Contains("application/json"))
{
format = "json";
}
else if (format.Contains("application/xml"))
{
format = "xml";
}
switch (format)
{
case "json":
context.Response.ContentType = "application/json; charset=utf-8";
context.Response.Write(JsonConvert.SerializeObject(response, Formatting.Indented));
break;
case "xml":
default:
context.Response.ContentType = "application/xml; charset=utf-8";
DataContractSerializer contractSerializer = new DataContractSerializer(typeof(ServiceErrorMessage));
using (MemoryStream memoryStream = new MemoryStream())
{
contractSerializer.WriteObject(memoryStream, response);
context.Response.Write(memoryStream.ToArray());
}
break;
}
if (!context.Response.Headers.ContainsKey("Error-Code"))
{
context.Response.Headers.Add("Error-Code", new[] { response.Code.ToString() });
}
await Next.Invoke(context);
return;
}
}
await Next.Invoke(context);
}