public void TestEndpoint(RoutingEndpoint endpoint)
{
if (endpoint.Instances?.Instance == null)
{
return;
}
foreach (var instance in endpoint.Instances.Instance)
{
this.TestServiceInstance(endpoint, instance);
}
}
private void TestServiceInstance(RoutingEndpoint endpoint, Instance instance)
{
var healthCheck = endpoint.HealthCheck;
if (healthCheck == null)
{
return;
}
Uri u = new Uri(instance.Url);
string host = u.Host;
string monitoringUri = u.Scheme + "://" + host + ":" + u.Port + (healthCheck.MonitoringPath.StartsWith("/") ? "" : "/") + healthCheck.MonitoringPath;
HttpClient httpClient;
if (this.httpClientMessageHandler == null)
{
httpClient = new HttpClient();
}
else
{
httpClient = new HttpClient(this.httpClientMessageHandler, disposeHandler: true);
}
try
{
using (var request = new HttpRequestMessage(new HttpMethod("get"), monitoringUri))
{
var responseTask = httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
responseTask.Wait(TimeoutMilliseconds);
if (responseTask.IsCanceled || responseTask.IsFaulted)
{
// timeout occured or an error
instance.Status = InstanceStatuses.Down;
return;
}
var response = responseTask.Result;
if (!response.IsSuccessStatusCode)
{
instance.Status = InstanceStatuses.Down;
return;
}
if (response.IsSuccessStatusCode && string.IsNullOrEmpty(healthCheck.ResponseShouldContainString))
{
instance.Status = InstanceStatuses.Up;
return;
}
var readResponseStreamTask = response.Content.ReadAsStreamAsync();
readResponseStreamTask.Wait(TimeoutMilliseconds);
var responseStream = readResponseStreamTask.Result;
if (readResponseStreamTask.IsCanceled || readResponseStreamTask.IsFaulted)
{
instance.Status = InstanceStatuses.Down;
return;
}
using (var sr = new StreamReader(responseStream))
{
string responseString = sr.ReadToEnd();
if (responseString.Contains(healthCheck.ResponseShouldContainString))
{
instance.Status = InstanceStatuses.Up;
return;
}
else
{
instance.Status = InstanceStatuses.Down;
return;
}
}
}
}
catch (Exception)
{
instance.Status = InstanceStatuses.Down;
}
finally
{
if (httpClient != null)
{
httpClient.Dispose();
}
}
} // TestServiceInstance
