private void ParseResponse(HttpResponseMessage response, DependencyTelemetry telemetry)
{
try
{
string targetApplicationId = HttpHeadersUtilities.GetRequestContextKeyValue(response.Headers, RequestResponseHeaders.RequestContextCorrelationTargetKey);
if (!string.IsNullOrEmpty(targetApplicationId) && !string.IsNullOrEmpty(telemetry.Context.InstrumentationKey))
{
// We only add the cross component correlation key if the key does not represent the current component.
string sourceApplicationId;
if (this.correlationIdLookupHelper.TryGetXComponentCorrelationId(telemetry.Context.InstrumentationKey, out sourceApplicationId) &&
targetApplicationId != sourceApplicationId)
{
telemetry.Type = RemoteDependencyConstants.AI;
telemetry.Target += " | " + targetApplicationId;
}
}
}
catch (Exception e)
{
AppMapCorrelationEventSource.Log.UnknownError(ExceptionUtilities.GetExceptionDetailString(e));
}
int statusCode = (int)response.StatusCode;
telemetry.ResultCode = (statusCode > 0) ? statusCode.ToString(CultureInfo.InvariantCulture) : string.Empty;
telemetry.Success = (statusCode > 0) && (statusCode < 400);
}
private void InjectRequestHeaders(HttpRequestMessage request, string instrumentationKey)
{
try
{
HttpRequestHeaders requestHeaders = request.Headers;
if (requestHeaders != null && this.setComponentCorrelationHttpHeaders && !this.correlationDomainExclusionList.Contains(request.RequestUri.Host))
{
string sourceApplicationId = null;
try
{
if (!string.IsNullOrEmpty(instrumentationKey) &&
!HttpHeadersUtilities.ContainsRequestContextKeyValue(requestHeaders, RequestResponseHeaders.RequestContextCorrelationSourceKey) &&
(this.configuration.ApplicationIdProvider?.TryGetApplicationId(instrumentationKey, out sourceApplicationId) ?? false))
{
HttpHeadersUtilities.SetRequestContextKeyValue(requestHeaders, RequestResponseHeaders.RequestContextCorrelationSourceKey, sourceApplicationId);
}
}
catch (Exception e)
{
AppMapCorrelationEventSource.Log.UnknownError(ExceptionUtilities.GetExceptionDetailString(e));
}
var currentActivity = Activity.Current;
switch (this.httpInstrumentationVersion)
{
case HttpInstrumentationVersion.V1:
// HttpClient does not add any headers
// add W3C or Request-Id depending on Activity format
// add correlation-context anyway
if (currentActivity.IdFormat == ActivityIdFormat.W3C)
{
InjectW3CHeaders(currentActivity, requestHeaders);
if (this.injectRequestIdInW3CMode)
{
InjectBackCompatibleRequestId(currentActivity, requestHeaders);
}
}
else
{
if (!requestHeaders.Contains(RequestResponseHeaders.RequestIdHeader))
{
requestHeaders.Add(RequestResponseHeaders.RequestIdHeader, currentActivity.Id);
}
}
InjectCorrelationContext(requestHeaders, currentActivity);
break;
case HttpInstrumentationVersion.V2:
// On V2, HttpClient adds Request-Id and Correlation-Context
// but not W3C
if (currentActivity.IdFormat == ActivityIdFormat.W3C)
{
// we are going to add W3C and Request-Id (in W3C-compatible format)
// as a result HttpClient will not add Request-Id AND Correlation-Context
InjectW3CHeaders(currentActivity, requestHeaders);
if (this.injectRequestIdInW3CMode)
{
InjectBackCompatibleRequestId(currentActivity, requestHeaders);
}
InjectCorrelationContext(requestHeaders, currentActivity);
}
break;
case HttpInstrumentationVersion.V3:
// on V3, HttpClient adds either W3C or Request-Id depending on Activity format
// and adds Correlation-Context
if (currentActivity.IdFormat == ActivityIdFormat.W3C && this.injectRequestIdInW3CMode)
{
// we are going to override Request-Id to be in W3C compatible mode
InjectBackCompatibleRequestId(currentActivity, requestHeaders);
}
break;
}
if (this.injectLegacyHeaders)
{
// Add the root ID (Activity.RootId works with W3C and Hierarchical format)
string rootId = currentActivity.RootId;
if (!string.IsNullOrEmpty(rootId) && !requestHeaders.Contains(RequestResponseHeaders.StandardRootIdHeader))
{
requestHeaders.Add(RequestResponseHeaders.StandardRootIdHeader, rootId);
}
// Add the parent ID
string parentId = currentActivity.IdFormat == ActivityIdFormat.W3C ?
W3CUtilities.FormatTelemetryId(rootId, currentActivity.SpanId.ToHexString()) :
currentActivity.Id;
if (!string.IsNullOrEmpty(parentId) && !requestHeaders.Contains(RequestResponseHeaders.StandardParentIdHeader))
{
requestHeaders.Add(RequestResponseHeaders.StandardParentIdHeader, parentId);
}
}
}
}
catch (Exception e)
{
AppMapCorrelationEventSource.Log.UnknownError(ExceptionUtilities.GetExceptionDetailString(e));
}
}
private void InjectRequestHeaders(HttpRequestMessage request, string instrumentationKey, bool isLegacyEvent = false)
{
try
{
var currentActivity = Activity.Current;
HttpRequestHeaders requestHeaders = request.Headers;
if (requestHeaders != null && this.setComponentCorrelationHttpHeaders && !this.correlationDomainExclusionList.Contains(request.RequestUri.Host))
{
try
{
if (!string.IsNullOrEmpty(instrumentationKey) && !HttpHeadersUtilities.ContainsRequestContextKeyValue(requestHeaders, RequestResponseHeaders.RequestContextCorrelationSourceKey))
{
string sourceApplicationId;
if (this.correlationIdLookupHelper.TryGetXComponentCorrelationId(instrumentationKey, out sourceApplicationId))
{
HttpHeadersUtilities.SetRequestContextKeyValue(requestHeaders, RequestResponseHeaders.RequestContextCorrelationSourceKey, sourceApplicationId);
}
}
}
catch (Exception e)
{
AppMapCorrelationEventSource.Log.UnknownError(ExceptionUtilities.GetExceptionDetailString(e));
}
// Add the root ID
string rootId = currentActivity.RootId;
if (!string.IsNullOrEmpty(rootId) &&
!requestHeaders.Contains(RequestResponseHeaders.StandardRootIdHeader))
{
requestHeaders.Add(RequestResponseHeaders.StandardRootIdHeader, rootId);
}
// Add the parent ID
string parentId = currentActivity.Id;
if (!string.IsNullOrEmpty(parentId) &&
!requestHeaders.Contains(RequestResponseHeaders.StandardParentIdHeader))
{
requestHeaders.Add(RequestResponseHeaders.StandardParentIdHeader, parentId);
if (isLegacyEvent)
{
requestHeaders.Add(RequestResponseHeaders.RequestIdHeader, parentId);
}
}
if (isLegacyEvent)
{
// we expect baggage to be empty or contain a few items
using (IEnumerator <KeyValuePair <string, string> > e = currentActivity.Baggage.GetEnumerator())
{
if (e.MoveNext())
{
var baggage = new List <string>();
do
{
KeyValuePair <string, string> item = e.Current;
baggage.Add(new NameValueHeaderValue(item.Key, item.Value).ToString());
}while (e.MoveNext());
request.Headers.Add(RequestResponseHeaders.CorrelationContextHeader, baggage);
}
}
}
}
}
catch (Exception e)
{
AppMapCorrelationEventSource.Log.UnknownError(ExceptionUtilities.GetExceptionDetailString(e));
}
}
#pragma warning disable 612, 618
private void InjectRequestHeaders(HttpRequestMessage request, string instrumentationKey, bool isLegacyEvent = false)
{
try
{
HttpRequestHeaders requestHeaders = request.Headers;
if (requestHeaders != null && this.setComponentCorrelationHttpHeaders && !this.correlationDomainExclusionList.Contains(request.RequestUri.Host))
{
string sourceApplicationId = null;
try
{
if (!string.IsNullOrEmpty(instrumentationKey) &&
!HttpHeadersUtilities.ContainsRequestContextKeyValue(requestHeaders, RequestResponseHeaders.RequestContextCorrelationSourceKey) &&
(this.configuration.ApplicationIdProvider?.TryGetApplicationId(instrumentationKey, out sourceApplicationId) ?? false))
{
HttpHeadersUtilities.SetRequestContextKeyValue(requestHeaders, RequestResponseHeaders.RequestContextCorrelationSourceKey, sourceApplicationId);
}
}
catch (Exception e)
{
AppMapCorrelationEventSource.Log.UnknownError(ExceptionUtilities.GetExceptionDetailString(e));
}
var currentActivity = Activity.Current;
if (isLegacyEvent)
{
if (!requestHeaders.Contains(RequestResponseHeaders.RequestIdHeader))
{
requestHeaders.Add(RequestResponseHeaders.RequestIdHeader, currentActivity.Id);
}
InjectCorrelationContext(requestHeaders, currentActivity);
}
if (this.injectLegacyHeaders)
{
// Add the root ID
string rootId = currentActivity.RootId;
if (!string.IsNullOrEmpty(rootId) && !requestHeaders.Contains(RequestResponseHeaders.StandardRootIdHeader))
{
requestHeaders.Add(RequestResponseHeaders.StandardRootIdHeader, rootId);
}
// Add the parent ID
string parentId = currentActivity.Id;
if (!string.IsNullOrEmpty(parentId) && !requestHeaders.Contains(RequestResponseHeaders.StandardParentIdHeader))
{
requestHeaders.Add(RequestResponseHeaders.StandardParentIdHeader, parentId);
}
}
if (this.injectW3CHeaders)
{
currentActivity.UpdateContextOnActivity();
string traceParent = currentActivity.GetTraceparent();
if (traceParent != null && !requestHeaders.Contains(W3CConstants.TraceParentHeader))
{
requestHeaders.Add(W3CConstants.TraceParentHeader, traceParent);
}
string traceState = currentActivity.GetTracestate();
if (!requestHeaders.Contains(W3CConstants.TraceStateHeader))
{
if (sourceApplicationId != null)
{
// TODO: there could be another az in the state.
// last updated state should appear first in the tracestate
string appIdPair = StringUtilities.FormatAzureTracestate(sourceApplicationId);
if (traceState == null)
{
traceState = appIdPair;
}
else
{
traceState = appIdPair + "," + traceState;
}
}
if (traceState != null)
{
requestHeaders.Add(W3CConstants.TraceStateHeader, traceState);
}
}
}
}
}
catch (Exception e)
{
AppMapCorrelationEventSource.Log.UnknownError(ExceptionUtilities.GetExceptionDetailString(e));
}
}