public void AddEndpoints(
List <Endpoint> endpoints,
HashSet <string> routeNames,
ActionDescriptor action,
IReadOnlyList <ConventionalRouteEntry> routes,
IReadOnlyList <Action <EndpointBuilder> > conventions,
bool createInertEndpoints)
{
if (endpoints == null)
{
throw new ArgumentNullException(nameof(endpoints));
}
if (routeNames == null)
{
throw new ArgumentNullException(nameof(routeNames));
}
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
if (routes == null)
{
throw new ArgumentNullException(nameof(routes));
}
if (conventions == null)
{
throw new ArgumentNullException(nameof(conventions));
}
if (createInertEndpoints)
{
var builder = new InertEndpointBuilder()
{
DisplayName = action.DisplayName,
RequestDelegate = _requestDelegate,
};
AddActionDataToBuilder(
builder,
routeNames,
action,
routeName: null,
dataTokens: null,
suppressLinkGeneration: false,
suppressPathMatching: false,
conventions,
Array.Empty <Action <EndpointBuilder> >());
endpoints.Add(builder.Build());
}
if (action.AttributeRouteInfo?.Template == null)
{
// Check each of the conventional patterns to see if the action would be reachable.
// If the action and pattern are compatible then create an endpoint with action
// route values on the pattern.
foreach (var route in routes)
{
// A route is applicable if:
// 1. It has a parameter (or default value) for 'required' non-null route value
// 2. It does not have a parameter (or default value) for 'required' null route value
var updatedRoutePattern = _routePatternTransformer.SubstituteRequiredValues(route.Pattern, action.RouteValues);
if (updatedRoutePattern == null)
{
continue;
}
var requestDelegate = CreateRequestDelegate(action, route.DataTokens) ?? _requestDelegate;
// We suppress link generation for each conventionally routed endpoint. We generate a single endpoint per-route
// to handle link generation.
var builder = new RouteEndpointBuilder(requestDelegate, updatedRoutePattern, route.Order)
{
DisplayName = action.DisplayName,
};
AddActionDataToBuilder(
builder,
routeNames,
action,
route.RouteName,
route.DataTokens,
suppressLinkGeneration: true,
suppressPathMatching: false,
conventions,
route.Conventions);
endpoints.Add(builder.Build());
}
}
else
{
var requestDelegate = CreateRequestDelegate(action) ?? _requestDelegate;
var attributeRoutePattern = RoutePatternFactory.Parse(action.AttributeRouteInfo.Template);
// Modify the route and required values to ensure required values can be successfully subsituted.
// Subsitituting required values into an attribute route pattern should always succeed.
var(resolvedRoutePattern, resolvedRouteValues) = ResolveDefaultsAndRequiredValues(action, attributeRoutePattern);
var updatedRoutePattern = _routePatternTransformer.SubstituteRequiredValues(resolvedRoutePattern, resolvedRouteValues);
if (updatedRoutePattern == null)
{
// This kind of thing can happen when a route pattern uses a *reserved* route value such as `action`.
// See: https://github.com/dotnet/aspnetcore/issues/14789
var formattedRouteKeys = string.Join(", ", resolvedRouteValues.Keys.Select(k => $"'{k}'"));
throw new InvalidOperationException(
$"Failed to update the route pattern '{resolvedRoutePattern.RawText}' with required route values. " +
$"This can occur when the route pattern contains parameters with reserved names such as: {formattedRouteKeys} " +
$"and also uses route constraints such as '{{action:int}}'. " +
"To fix this error, choose a different parameter name.");
}
var builder = new RouteEndpointBuilder(requestDelegate, updatedRoutePattern, action.AttributeRouteInfo.Order)
{
DisplayName = action.DisplayName,
};
AddActionDataToBuilder(
builder,
routeNames,
action,
action.AttributeRouteInfo.Name,
dataTokens: null,
action.AttributeRouteInfo.SuppressLinkGeneration,
action.AttributeRouteInfo.SuppressPathMatching,
conventions,
perRouteConventions: Array.Empty <Action <EndpointBuilder> >());
endpoints.Add(builder.Build());
}
}
public void AddEndpoints(
List <Endpoint> endpoints,
HashSet <string> routeNames,
ActionDescriptor action,
IReadOnlyList <ConventionalRouteEntry> routes,
IReadOnlyList <Action <EndpointBuilder> > conventions,
bool createInertEndpoints)
{
if (endpoints == null)
{
throw new ArgumentNullException(nameof(endpoints));
}
if (routeNames == null)
{
throw new ArgumentNullException(nameof(routeNames));
}
if (action == null)
{
throw new ArgumentNullException(nameof(action));
}
if (routes == null)
{
throw new ArgumentNullException(nameof(routes));
}
if (conventions == null)
{
throw new ArgumentNullException(nameof(conventions));
}
if (createInertEndpoints)
{
var builder = new InertEndpointBuilder()
{
DisplayName = action.DisplayName,
RequestDelegate = _requestDelegate,
};
AddActionDataToBuilder(
builder,
routeNames,
action,
routeName: null,
dataTokens: null,
suppressLinkGeneration: false,
suppressPathMatching: false,
conventions,
Array.Empty <Action <EndpointBuilder> >());
endpoints.Add(builder.Build());
}
if (action.AttributeRouteInfo == null)
{
// Check each of the conventional patterns to see if the action would be reachable.
// If the action and pattern are compatible then create an endpoint with action
// route values on the pattern.
foreach (var route in routes)
{
// A route is applicable if:
// 1. It has a parameter (or default value) for 'required' non-null route value
// 2. It does not have a parameter (or default value) for 'required' null route value
var updatedRoutePattern = _routePatternTransformer.SubstituteRequiredValues(route.Pattern, action.RouteValues);
if (updatedRoutePattern == null)
{
continue;
}
// We suppress link generation for each conventionally routed endpoint. We generate a single endpoint per-route
// to handle link generation.
var builder = new RouteEndpointBuilder(_requestDelegate, updatedRoutePattern, route.Order)
{
DisplayName = action.DisplayName,
};
AddActionDataToBuilder(
builder,
routeNames,
action,
route.RouteName,
route.DataTokens,
suppressLinkGeneration: true,
suppressPathMatching: false,
conventions,
route.Conventions);
endpoints.Add(builder.Build());
}
}
else
{
var attributeRoutePattern = RoutePatternFactory.Parse(action.AttributeRouteInfo.Template);
// Modify the route and required values to ensure required values can be successfully subsituted.
// Subsitituting required values into an attribute route pattern should always succeed.
var(resolvedRoutePattern, resolvedRouteValues) = ResolveDefaultsAndRequiredValues(action, attributeRoutePattern);
var updatedRoutePattern = _routePatternTransformer.SubstituteRequiredValues(resolvedRoutePattern, resolvedRouteValues);
if (updatedRoutePattern == null)
{
throw new InvalidOperationException("Failed to update route pattern with required values.");
}
var builder = new RouteEndpointBuilder(_requestDelegate, updatedRoutePattern, action.AttributeRouteInfo.Order)
{
DisplayName = action.DisplayName,
};
AddActionDataToBuilder(
builder,
routeNames,
action,
action.AttributeRouteInfo.Name,
dataTokens: null,
action.AttributeRouteInfo.SuppressLinkGeneration,
action.AttributeRouteInfo.SuppressPathMatching,
conventions,
perRouteConventions: Array.Empty <Action <EndpointBuilder> >());
endpoints.Add(builder.Build());
}
}
