/// <summary>
/// Selects and endpoint (aka "listener") from a presented <paramref name="endpoints"/> collection
/// that satisfies all constraints of <paramref name="fabricServiceEndpoint"/>.
/// </summary>
/// <param name="fabricServiceEndpoint">User-defined info and constraints for the selecting an endpoint from <paramref name="fabricServiceEndpoint"/>.</param>
/// <param name="endpoints">Collection of endpoints to choose from.</param>
/// <param name="endpointUri">The endpoint URI to extract.</param>
/// <returns>Boolean indicating whether an endpoint URI was successfully retrieved.</returns>
public static bool TryGetEndpoint(
FabricServiceEndpoint fabricServiceEndpoint,
ServiceEndpointCollection endpoints,
out Uri endpointUri)
{
_ = fabricServiceEndpoint ?? throw new ArgumentNullException(nameof(fabricServiceEndpoint));
_ = endpoints ?? throw new ArgumentNullException(nameof(endpoints));
endpointUri = null;
string endpointAddress = null;
foreach (var listenerName in fabricServiceEndpoint.ListenerNames)
{
// SF Reverse Proxy endpoint selection logic: https://msazure.visualstudio.com/One/_git/WindowsFabric?path=%2Fsrc%2Fprod%2Fsrc%2FManagement%2FApplicationGateway%2FHttp%2FServiceEndpointsList.cpp&version=GBrelease_6.5&line=52&lineStyle=plain&lineEnd=53&lineStartColumn=1&lineEndColumn=1
if (listenerName == string.Empty && fabricServiceEndpoint.EmptyStringMatchesAnyListener)
{
endpointUri = endpoints.ToReadOnlyDictionary()
// NOTE: Ordinal comparison used to match sort order of Service Fabric Reverse Proxy
.OrderBy(listenerAddressPair => listenerAddressPair.Key, StringComparer.Ordinal)
// From the endpoints above, select endpoints with valid URIs
.Select(listenerAddressPair =>
{
if (Uri.TryCreate(listenerAddressPair.Value, UriKind.Absolute, out var uri))
{
return(uri);
}
return(null);
})
.Where(replicaAddress => replicaAddress != null)
// Pick first endpoint that matches scheme predicate.
.FirstOrDefault(replicaAddress =>
{
if (fabricServiceEndpoint.AllowedSchemePredicate(replicaAddress.Scheme))
{
return(true);
}
return(false);
});
// Bail as soon as first valid endpoint is found.
if (endpointUri != null)
{
// CoreFrameworkFabricTrace.Instance.TraceVerbose("Located endpoint URI is '{0}'", endpointUri);
return(true);
}
}
else
{
// Pick named listener endpoint
if (endpoints.TryGetEndpointAddress(listenerName: listenerName, endpointAddress: out endpointAddress))
{
if (!Uri.TryCreate(endpointAddress, UriKind.Absolute, out var endpointUri_))
{
continue;
}
// Match the Uri against allowed scheme predicate.
if (!fabricServiceEndpoint.AllowedSchemePredicate(endpointUri_.Scheme))
{
continue;
}
endpointUri = endpointUri_;
// CoreFrameworkFabricTrace.Instance.TraceVerbose("Located endpoint URI is '{0}'", endpointUri);
return(true);
}
}
}
return(false);
}
/// <summary>
/// Selects and endpoint (aka "listener") from a presented <paramref name="endpoints"/> collection
/// that satisfies all constraints of <paramref name="fabricServiceEndpoint"/>.
/// </summary>
/// <param name="fabricServiceEndpoint">User-defined info and constraints for the selecting an endpoint from <paramref name="fabricServiceEndpoint"/>.</param>
/// <param name="endpoints">Collection of endpoints to choose from.</param>
/// <param name="endpointUri">The endpoint URI to extract.</param>
/// <returns>Boolean indicating whether an endpoint URI was successfully retrieved.</returns>
public static bool TryGetEndpoint(
FabricServiceEndpoint fabricServiceEndpoint,
ServiceEndpointCollection endpoints,
out Uri endpointUri)
{
_ = fabricServiceEndpoint ?? throw new ArgumentNullException(nameof(fabricServiceEndpoint));
_ = endpoints ?? throw new ArgumentNullException(nameof(endpoints));
endpointUri = null;
string endpointAddress = null;
foreach (var listenerName in fabricServiceEndpoint.ListenerNames)
{
// SF Reverse Proxy endpoint selection logic: https://github.com/microsoft/service-fabric/blob/1e118f02294c99b61e676c07ac97283ee12197d4/src/prod/src/Management/ApplicationGateway/Http/ServiceEndpointsList.cpp#L52
if (listenerName == string.Empty && fabricServiceEndpoint.EmptyStringMatchesAnyListener)
{
endpointUri = endpoints.ToReadOnlyDictionary()
// NOTE: Ordinal comparison used to match sort order of Service Fabric Reverse Proxy
.OrderBy(listenerAddressPair => listenerAddressPair.Key, StringComparer.Ordinal)
// From the endpoints above, select endpoints with valid URIs
.Select(listenerAddressPair =>
{
if (Uri.TryCreate(listenerAddressPair.Value, UriKind.Absolute, out var uri))
{
return(uri);
}
return(null);
})
.Where(replicaAddress => replicaAddress != null)
// Pick first endpoint that matches scheme predicate.
.FirstOrDefault(replicaAddress =>
{
if (fabricServiceEndpoint.AllowedSchemePredicate(replicaAddress.Scheme))
{
return(true);
}
return(false);
});
// Bail as soon as first valid endpoint is found.
if (endpointUri != null)
{
// CoreFrameworkFabricTrace.Instance.TraceVerbose("Located endpoint URI is '{0}'", endpointUri);
return(true);
}
}
else
{
// Pick named listener endpoint
if (endpoints.TryGetEndpointAddress(listenerName: listenerName, endpointAddress: out endpointAddress))
{
if (!Uri.TryCreate(endpointAddress, UriKind.Absolute, out var endpointUri_))
{
continue;
}
// Match the Uri against allowed scheme predicate.
if (!fabricServiceEndpoint.AllowedSchemePredicate(endpointUri_.Scheme))
{
continue;
}
endpointUri = endpointUri_;
// CoreFrameworkFabricTrace.Instance.TraceVerbose("Located endpoint URI is '{0}'", endpointUri);
return(true);
}
}
}
return(false);
}
