/// <summary>
/// intercepts the http request that was about to hit a downstream server and return a stub instead
/// </summary>
/// <param name="request"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
protected async override Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
var session = ContextRepo.GetSession();
if (session == null)
{
throw new ApplicationException("No session found");
}
var requestWrapper = new HttpRequestMessageWrapper(request);
ContextRepo.OutgoingRequests[session].Add(requestWrapper);
// there could be more than one stub for the same endpoint, perhaps returning different responses, we grab the first
var match = ContextRepo.StubbedEndpoints[session].FirstOrDefault(c => c.IsMatch(requestWrapper));
if (match == null)
{
throw new ApplicationException($"No stubs found for [{requestWrapper.GetEndpoint()}], please make sure you called 'AppendHttpCallStub'");
}
ContextRepo.StubbedEndpoints[session].Remove(match);
if (match.Exception != null)
{
throw match.Exception;
}
return(match.Response);
}
public bool IsMatch(HttpRequestMessageWrapper request)
{
if (endpoint != request.GetEndpoint())
{
return(false);
}
if (headerMatches == null)
{
return(true); // nothing else to match, endpoint already matches
}
foreach (var key in headerMatches.Keys)
{
if (!request.Request.Headers.Contains(key))
{
return(false); // mandatory header doesn't exist
}
if (request.Request.Headers.GetValues(key).FirstOrDefault() != headerMatches[key])
{
return(false); // mandatory header doesn't exist
}
}
return(true); // all headers match
}