public async Task RequestWithException_ShouldWrapWithUnhandledException()
{
_testinghost.Instance.When(a => a.DoSomething()).Throw(x => new ArgumentException("MyEx"));
var request = await GetRequestFor<IDemoService>(p => p.DoSomething());
var responseJson = await (await new HttpClient().SendAsync(request)).Content.ReadAsStringAsync();
var responseException = _exceptionSerializer.Deserialize(responseJson);
responseException.ShouldBeOfType<UnhandledException>();
}
public async Task RequestWithException_ShouldNotWrap(Type exceptionType)
{
_testinghost.Instance.When(a => a.DoSomething()).Throw(i => (Exception)Activator.CreateInstance(exceptionType, "MyEx", null, null, null));
var request = await GetRequestFor <IDemoService>(p => p.DoSomething());
var responseJson = await(await new HttpClient().SendAsync(request)).Content.ReadAsStringAsync();
var responseException = JsonExceptionSerializer.Deserialize(responseJson);
responseException.ShouldBeOfType(exceptionType);
}
public void RequestException_RoundTrip_IsIdentical()
{
var expected = new RequestException("message").ThrowAndCatch();
var json = JsonExceptionSerializer.Serialize(expected);
var actual = JsonExceptionSerializer.Deserialize(json);
actual.ShouldBeOfType <RequestException>();
actual.Message.ShouldBe(expected.Message);
actual.StackTrace.ShouldBe(expected.StackTrace);
}
public void HttpRequestException_RoundTrip_ReturnsSubstitue()
{
var ex = new HttpRequestException("message").ThrowAndCatch();
var json = JsonExceptionSerializer.Serialize(ex);
var actual = JsonExceptionSerializer.Deserialize(json);
var envException = actual.ShouldBeOfType <EnvironmentException>();
envException.RawMessage().ShouldEndWith(ex.RawMessage());
envException.UnencryptedTags["originalStackTrace"].ShouldBe(ex.StackTrace);
}
public void InnerHttpRequestException_RoundTrip_IsStripped()
{
var webEx = new WebException("Web exception").ThrowAndCatch();
var httpEx = new HttpRequestException("HTTP request exception", webEx).ThrowAndCatch();
var ex = new RemoteServiceException("Remote service exception", "http://foo/bar", httpEx).ThrowAndCatch();
string json = JsonExceptionSerializer.Serialize(ex);
var actual = JsonExceptionSerializer.Deserialize(json);
actual.ShouldBeOfType <RemoteServiceException>();
actual.Message.ShouldBe(ex.Message);
actual.StackTrace.ShouldBe(ex.StackTrace);
actual.InnerException.ShouldBeOfType <WebException>();
actual.InnerException.Message.ShouldBe(webEx.Message);
actual.InnerException.StackTrace.ShouldBe(webEx.StackTrace);
}
public void ExceptionTypeNotAvailable_RoundTrip_FallsBackToAvailableType()
{
var expected = new MyException(30000, "message")
{
MyNumber = 42
}.ThrowAndCatch();
var json = JsonExceptionSerializer.Serialize(expected);
json = json.Replace("MyException", "MyNonexistentException");
var actual = (RequestException)JsonExceptionSerializer.Deserialize(json);
actual.ShouldBeOfType <RequestException>();
actual.Message.ShouldBe(expected.Message);
actual.ErrorCode.ShouldBe(30000);
actual.ExtendedProperties.Count.ShouldBe(1);
actual.ExtendedProperties.Single().ShouldBe(new KeyValuePair <string, object>("MyNumber", 42L));
actual.StackTrace.ShouldBe(expected.StackTrace);
}
private async Task <object> InvokeCore(HttpServiceRequest request, Type resultReturnType, JsonSerializerSettings jsonSettings)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
request.Overrides = TracingContext.TryGetOverrides();
request.TracingData = new TracingData
{
HostName = CurrentApplicationInfo.HostName?.ToUpperInvariant(),
ServiceName = CurrentApplicationInfo.Name,
RequestID = TracingContext.TryGetRequestID(),
SpanID = Guid.NewGuid().ToString("N"), //Each call is new span
ParentSpanID = TracingContext.TryGetSpanID()
};
PrepareRequest?.Invoke(request);
var requestContent = _serializationTime.Time(() => JsonConvert.SerializeObject(request, jsonSettings));
var serviceEvent = EventPublisher.CreateEvent();
serviceEvent.TargetService = ServiceName;
serviceEvent.TargetMethod = request.Target.MethodName;
serviceEvent.RequestId = request.TracingData?.RequestID;
serviceEvent.SpanId = request.TracingData?.SpanID;
serviceEvent.ParentSpanId = request.TracingData?.ParentSpanID;
var config = GetConfig();
while (true)
{
string responseContent;
HttpResponseMessage response;
IEndPointHandle endPoint = await ServiceDiscovery.GetNextHost(serviceEvent.RequestId).ConfigureAwait(false);
// The URL is only for a nice experience in Fiddler, it's never parsed/used for anything.
var uri = string.Format(BuildUri(endPoint, config) + ServiceName);
if (request.Target.MethodName != null)
{
uri += $".{request.Target.MethodName}";
}
if (request.Target.Endpoint != null)
{
uri += $"/{request.Target.Endpoint}";
}
try
{
Log.Debug(_ => _("ServiceProxy: Calling remote service. See tags for details.",
unencryptedTags: new
{
remoteEndpoint = endPoint.HostName,
remotePort = endPoint.Port ?? DefaultPort,
remoteServiceName = ServiceName,
remoteMethodName = request.Target.MethodName
}));
serviceEvent.TargetHostName = endPoint.HostName;
var httpContent = new StringContent(requestContent, Encoding.UTF8, "application/json");
httpContent.Headers.Add(GigyaHttpHeaders.Version, HttpServiceRequest.Version);
serviceEvent.RequestStartTimestamp = Stopwatch.GetTimestamp();
try
{
response = await GetHttpClient(config).PostAsync(uri, httpContent).ConfigureAwait(false);
responseContent = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
}
finally
{
serviceEvent.ResponseEndTimestamp = Stopwatch.GetTimestamp();
}
IEnumerable <string> values;
if (response.Headers.TryGetValues(GigyaHttpHeaders.ExecutionTime, out values))
{
var time = values.FirstOrDefault();
TimeSpan executionTime;
if (TimeSpan.TryParse(time, out executionTime))
{
serviceEvent.ServerTimeMs = executionTime.TotalMilliseconds;
}
}
}
catch (HttpRequestException ex)
{
Log.Error("The remote service failed to return a valid HTTP response. Continuing to next " +
"host. See tags for URL and exception for details.",
exception: ex,
unencryptedTags: new { uri });
endPoint.ReportFailure(ex);
_hostFailureCounter.Increment("RequestFailure");
serviceEvent.Exception = ex;
EventPublisher.TryPublish(serviceEvent); // fire and forget!
continue;
}
catch (TaskCanceledException ex)
{
_failureCounter.Increment("RequestTimeout");
Exception rex = new RemoteServiceException("The request to the remote service exceeded the " +
"allotted timeout. See the 'RequestUri' property on this exception for the URL that was " +
"called and the tag 'requestTimeout' for the configured timeout.",
uri,
ex,
unencrypted: new Tags
{
{ "requestTimeout", LastHttpClient?.Timeout.ToString() },
{ "requestUri", uri }
});
serviceEvent.Exception = rex;
EventPublisher.TryPublish(serviceEvent); // fire and forget!
throw rex;
}
if (response.Headers.Contains(GigyaHttpHeaders.ServerHostname) || response.Headers.Contains(GigyaHttpHeaders.Version))
{
try
{
endPoint.ReportSuccess();
if (response.IsSuccessStatusCode)
{
var returnObj = _deserializationTime.Time(() => JsonConvert.DeserializeObject(responseContent, resultReturnType, jsonSettings));
serviceEvent.ErrCode = 0;
EventPublisher.TryPublish(serviceEvent); // fire and forget!
_successCounter.Increment();
return(returnObj);
}
else
{
Exception remoteException;
try
{
remoteException = _deserializationTime.Time(() => JsonExceptionSerializer.Deserialize(responseContent));
}
catch (Exception ex)
{
_applicationExceptionCounter.Increment("ExceptionDeserializationFailure");
throw new RemoteServiceException("The remote service returned a failure response " +
"that failed to deserialize. See the 'RequestUri' property on this exception " +
"for the URL that was called, the inner exception for the exact error and the " +
"'responseContent' encrypted tag for the original response content.",
uri,
ex,
unencrypted: new Tags {
{ "requestUri", uri }
},
encrypted: new Tags {
{ "responseContent", responseContent }
});
}
_applicationExceptionCounter.Increment();
serviceEvent.Exception = remoteException;
EventPublisher.TryPublish(serviceEvent); // fire and forget!
if (remoteException is RequestException || remoteException is EnvironmentException)
{
ExceptionDispatchInfo.Capture(remoteException).Throw();
}
if (remoteException is UnhandledException)
{
remoteException = remoteException.InnerException;
}
throw new RemoteServiceException("The remote service returned a failure response. See " +
"the 'RequestUri' property on this exception for the URL that was called, and the " +
"inner exception for details.",
uri,
remoteException,
unencrypted: new Tags {
{ "requestUri", uri }
});
}
}
catch (JsonException ex)
{
_failureCounter.Increment("Serialization");
Log.Error(_ => _("The remote service returned a response with JSON that failed " +
"deserialization. See the 'uri' tag for the URL that was called, the exception for the " +
"exact error and the 'responseContent' encrypted tag for the original response content.",
exception: ex,
unencryptedTags: new { uri },
encryptedTags: new { responseContent }));
serviceEvent.Exception = ex;
EventPublisher.TryPublish(serviceEvent); // fire and forget!
throw new RemoteServiceException("The remote service returned a response with JSON that " +
"failed deserialization. See the 'RequestUri' property on this exception for the URL " +
"that was called, the inner exception for the exact error and the 'responseContent' " +
"encrypted tag for the original response content.",
uri,
ex,
new Tags {
{ "responseContent", responseContent }
},
new Tags {
{ "requestUri", uri }
});
}
}
else
{
var exception = response.StatusCode == HttpStatusCode.ServiceUnavailable ?
new Exception($"The remote service is unavailable (503) and is not recognized as a Gigya host at uri: {uri}"):
new Exception($"The remote service returned a response but is not recognized as a Gigya host at uri: {uri}");
endPoint.ReportFailure(exception);
_hostFailureCounter.Increment("NotGigyaHost");
if (response.StatusCode == HttpStatusCode.ServiceUnavailable)
{
Log.Error(_ => _("The remote service is unavailable (503) and is not recognized as a Gigya host. Continuing to next host.", unencryptedTags: new { uri }));
}
else
{
Log.Error(_ => _("The remote service returned a response but is not recognized as a Gigya host. Continuing to next host.", unencryptedTags: new { uri, statusCode = response.StatusCode }, encryptedTags: new { responseContent }));
}
serviceEvent.ErrCode = 500001; //(int)GSErrors.General_Server_Error;
EventPublisher.TryPublish(serviceEvent); // fire and forget!
}
}
}
