private void SetTarget(DependencyTelemetry telemetry, WebHeaderCollection responseHeaders)
{
if (responseHeaders != null)
{
string targetAppId = null;
try
{
targetAppId = responseHeaders.GetNameValueHeaderValue(
RequestResponseHeaders.RequestContextHeader,
RequestResponseHeaders.RequestContextCorrelationTargetKey);
}
catch (Exception ex)
{
AppMapCorrelationEventSource.Log.GetCrossComponentCorrelationHeaderFailed(ex.ToInvariantString());
}
string currentComponentAppId = null;
if (this.configuration.ApplicationIdProvider?.TryGetApplicationId(telemetry.Context.InstrumentationKey, out currentComponentAppId) ?? false)
{
// We only add the cross component correlation key if the key does not remain the current component.
if (!string.IsNullOrEmpty(targetAppId) && targetAppId != currentComponentAppId)
{
telemetry.Type = RemoteDependencyConstants.AI;
telemetry.Target += " | " + targetAppId;
}
}
}
}
public void GetNameValueHeaderWorksCorrectly()
{
WebHeaderCollection headers = new WebHeaderCollection();
// header collection empty
Assert.IsNull(headers.GetNameValueHeaderValue("someName", "someKey"));
headers.Add("header-one", "value1");
headers.Add("header-two", "value2");
// header not found
Assert.IsNull(headers.GetNameValueHeaderValue("myheader", "key1"));
// header key not found
Assert.IsNull(headers.GetNameValueHeaderValue("header-two", "key1"));
// header should be found. We test cases were there are spaces around delimeters.
headers.Add("headerThree", "key1=value1, key2=value2");
headers.Add("Header-Four", "key1=value1,key2=value2,key3=value3");
headers.Add("Header-Five", "key1=value1,key2 = value2,key3=value3");
Assert.AreEqual("value2", headers.GetNameValueHeaderValue("headerThree", "key2"));
Assert.AreEqual("value2", headers.GetNameValueHeaderValue("Header-Four", "key2"));
Assert.AreEqual("value2", headers.GetNameValueHeaderValue("Header-Five", "key2"));
// header with key value format but missing key
Assert.IsNull(headers.GetNameValueHeaderValue("headerThree", "keyX"));
}
