public async Task ApplyAsync(HttpContext httpContext, CandidateSet candidates)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (candidates == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
var hasCandidates = false;
var valid = true;
for (int index = 0; index < candidates.Count; index++)
{
var endpoint = candidates[index].Endpoint;
var allMetadata = endpoint?.Metadata
.GetOrderedMetadata <IFeatureFilterMetadata>();
if (allMetadata != null && allMetadata.Any())
{
foreach (var metadata in allMetadata)
{
var featureService = httpContext
.RequestServices
.GetService <IFeatureService>();
_diagnostics.FeatureMatcherPolicyEvaluatingFeatures(endpoint.DisplayName, metadata.Name);
if (!String.IsNullOrWhiteSpace(metadata.Name))
{
if (!await featureService.IsEnabledAsync(metadata.Name.Trim()))
{
_diagnostics.FeatureMatcherPolicyEndpointIsNotValid(endpoint.DisplayName);
valid = false & valid;
break;
}
}
}
}
else
{
_diagnostics.FeatureMatcherPolicyEndpointIsValid(endpoint.DisplayName);
valid = true;
}
hasCandidates |= valid;
candidates.SetValidity(index, value: valid);
}
if (!hasCandidates)
{
var fallbackService = httpContext
.RequestServices
.GetService <EndpointFallbackService>();
if (fallbackService != null)
{
var requestPath = httpContext.Request.Path;
_diagnostics.FeatureMatcherPolicyExecutingFallbackEndpoint(requestPath);
var defaultEndPoint = fallbackService.CreateFallbackEndpoint(requestPath);
httpContext.SetEndpoint(defaultEndPoint);
httpContext.Request.RouteValues = null;
}
}
}
public async Task ApplyAsync(HttpContext httpContext, CandidateSet candidates)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (candidates == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
var hasCandidates = false;
var valid = true;
for (int index = 0; index < candidates.Count; index++)
{
var endpoint = candidates[index].Endpoint;
var allMetadata = endpoint?.Metadata
.GetOrderedMetadata <IFeatureFilterMetadata>();
if (allMetadata != null && allMetadata.Any())
{
foreach (var metadata in allMetadata)
{
_diagnostics.FeatureMatcherPolicyEvaluatingFeatures(endpoint.DisplayName, metadata.Names, metadata.ProductName);
var featureService = httpContext
.RequestServices
.GetService <IFeatureService>();
var tokenizer = new StringTokenizer(metadata.Names, split_characters);
foreach (var token in tokenizer)
{
var featureName = token.Trim();
if (featureName.HasValue && featureName.Length > 0)
{
if (!await featureService.IsEnabledAsync(featureName.Value, metadata.ProductName))
{
_diagnostics.FeatureMatcherPolicyEndpointIsNotValid(endpoint.DisplayName);
valid = false & valid;
break;
}
}
}
}
}
else
{
_diagnostics.FeatureMatcherPolicyEndpointIsValid(endpoint.DisplayName);
valid = true;
}
hasCandidates |= valid;
candidates.SetValidity(index, value: valid);
}
if (!hasCandidates)
{
var fallbackService = httpContext
.RequestServices
.GetService <EndpointFallbackService>();
if (fallbackService != null)
{
_diagnostics.FeatureMatcherPolicyExecutingFallbackEndpoint(httpContext.Request.Path);
httpContext.SetEndpoint(
CreateFallbackEndpoint(fallbackService.RequestDelegate, fallbackService.EndpointDisplayName));
httpContext.Request.RouteValues = null;
}
}
}