///<summary>
/// Gets http request url from activity tag objects.
///</summary>
internal static string GetRequestUrl(this AzMonList tagObjects)
{
// From spec: one of the following combinations is required in case of server spans:
// https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/http.md#http-server-semantic-conventions
// http.url
// http.scheme, http.host, http.target
// http.scheme, http.server_name, net.host.port, http.target
// http.scheme, net.host.name, net.host.port, http.target
string url = null;
url = tagObjects.GetUrlUsingHttpUrl();
if (url != null)
{
return(url);
}
var httpScheme = AzMonList.GetTagValue(ref tagObjects, SemanticConventions.AttributeHttpScheme)?.ToString();
if (!string.IsNullOrWhiteSpace(httpScheme))
{
var httpTarget = AzMonList.GetTagValue(ref tagObjects, SemanticConventions.AttributeHttpTarget)?.ToString();
// http.target is required in other three possible combinations
// If not available then do not proceed.
if (string.IsNullOrWhiteSpace(httpTarget))
{
return(null);
}
string defaultPort = GetDefaultHttpPort(httpScheme);
url = tagObjects.GetUrlUsingHttpHost(httpScheme, defaultPort, httpTarget);
if (url != null)
{
return(url);
}
var httpServerName = AzMonList.GetTagValue(ref tagObjects, SemanticConventions.AttributeHttpServerName)?.ToString();
string host;
if (!string.IsNullOrWhiteSpace(httpServerName))
{
host = httpServerName;
}
else
{
host = AzMonList.GetTagValue(ref tagObjects, SemanticConventions.AttributeNetHostName)?.ToString();
}
if (!string.IsNullOrWhiteSpace(host))
{
var netHostPort = AzMonList.GetTagValue(ref tagObjects, SemanticConventions.AttributeNetHostPort)?.ToString();
if (!string.IsNullOrWhiteSpace(netHostPort))
{
url = tagObjects.GetUrlUsingHostAndPort(httpScheme, host, netHostPort, defaultPort, httpTarget);
return(url);
}
}
}
return(url);
}