/// <summary>Gets the template information.</summary>
/// <param name="context">The context.</param>
/// <param name="resolver">The resolver.</param>
/// <param name="routes">The routes.</param>
/// <returns></returns>
private static async Task <ApiRoutingTemplate> GetRoutingTemplate(
this ApiRequestContext context,
IUriRouteResolver resolver,
IApiRoutingTable routes)
{
RouteMatch result;
ApiRoutingTemplate template = null;
foreach (var route in routes.GetRoutes())
{
result = await resolver.ResolveRoute(route.Template, context.Request.Path).ConfigureAwait(false);
if (result?.IsMatch ?? false)
{
if (template == null)
{
template = new ApiRoutingTemplate(route.Template);
}
template.Locations.Add(new ApiEndpointLocation(
controller: route.Location.Controller,
methodInfo: route.Location.MethodInfo,
httpMethod: route.Location.HttpMethod,
bodyParameterType: route.Location.BodyParameterType,
uriParameterType: route.Location.UriParameterType,
simpleParameters: route.Location.SimpleParameters,
methodReturnType: route.Location.MethodReturnType));
}
}
return(template);
}
/// <summary>Processes the HTTP request method.</summary>
/// <param name="context">The context.</param>
/// <param name="routes">The routes.</param>
/// <param name="resolver">The resolver.</param>
/// <param name="defaultRequestConfiguration">The default request configuration.</param>
/// <returns></returns>
internal static async Task <bool> ProcessHttpRequestMethod(this ApiRequestContext context,
IApiRoutingTable routes,
IUriRouteResolver resolver,
IDeepSleepRequestConfiguration defaultRequestConfiguration)
{
if (!context.RequestAborted.IsCancellationRequested)
{
// Templates exist for thies route
if ((context.Routing?.Template?.Locations?.Count ?? 0) > 0)
{
// A route was not found for the template
if (context.Routing.Route == null)
{
var methods = context.Routing.Template.Locations
.Where(e => !string.IsNullOrWhiteSpace(e?.HttpMethod))
.Select(e => e.HttpMethod.ToUpper())
.Distinct()
.ToList();
if (methods.Contains("GET") && !methods.Contains("HEAD"))
{
if (resolver != null)
{
var match = await resolver.MatchRoute(
routes,
"GET",
context.Request.Path).ConfigureAwait(false);
if (match != null)
{
var enableHeadForGetRequests = match.Configuration?.EnableHeadForGetRequests
?? defaultRequestConfiguration?.EnableHeadForGetRequests
?? ApiRequestContext.GetDefaultRequestConfiguration().EnableHeadForGetRequests
?? true;
if (enableHeadForGetRequests)
{
methods.Add("HEAD");
}
}
}
}
context.Runtime.Internals.IsMethodNotFound = true;
context.Response.AddHeader("Allow", string.Join(", ", methods));
context.Response.StatusCode = 405;
return(false);
}
}
return(true);
}
return(false);
}
/// <summary>Processes the HTTP request routing.</summary>
/// <param name="context">The context.</param>
/// <param name="routes">The routes.</param>
/// <param name="resolver">The resolver.</param>
/// <param name="defaultRequestConfig">The default request configuration.</param>
/// <returns></returns>
internal static async Task <bool> ProcessHttpRequestRouting(this ApiRequestContext context,
IApiRoutingTable routes,
IUriRouteResolver resolver,
IDeepSleepRequestConfiguration defaultRequestConfig)
{
if (!context.RequestAborted.IsCancellationRequested)
{
if (routes != null && resolver != null)
{
context.Routing.Route = await context.GetRoutingItem(resolver, routes, defaultRequestConfig).ConfigureAwait(false);
context.Routing.Template = await context.GetRoutingTemplate(resolver, routes).ConfigureAwait(false);
}
context.Configuration = MergeConfigurations(
serviceProvider: context?.RequestServices,
defaultConfig: defaultRequestConfig,
endpointConfig: context.Routing?.Route?.Configuration);
if (context.Routing.Route?.Location?.MethodInfo != null)
{
var attributes = context.Routing.Route.Location.MethodInfo.GetCustomAttributes();
// Find any attribute request pipeline components
// and add the to the final configuration of the request.
attributes
.Where(a => a as IRequestPipelineComponent != null)
.Select(a => a as IRequestPipelineComponent)
.ToList()
.ForEach(p => context.Configuration.PipelineComponents.Add(p));
// Find any attribute validator components
// and add the to the final configuration of the request.
attributes
.Where(a => a as IEndpointValidatorComponent != null)
.Select(a => a as IEndpointValidatorComponent)
.ToList()
.ForEach(v => context.Configuration.Validators.Add(v));
// Find any authentication components
// and add the to the final configuration of the request.
var authenticationComponents = attributes
.Where(a => a as IAuthenticationComponent != null)
.Select(a => a as IAuthenticationComponent)
.ToList();
if (authenticationComponents.Count > 0)
{
context.Configuration.AuthenticationProviders = authenticationComponents;
}
// Find any authorization components
// and add the to the final configuration of the request.
var authorizationComponents = attributes
.Where(a => a as IAuthorizationComponent != null)
.Select(a => a as IAuthorizationComponent)
.ToList();
if (authorizationComponents.Count > 0)
{
context.Configuration.AuthorizationProviders = authorizationComponents;
}
}
if (context.Configuration?.RequestValidation?.MaxRequestLength != null && context.ConfigureMaxRequestLength != null)
{
try
{
context.ConfigureMaxRequestLength(context.Configuration.RequestValidation.MaxRequestLength.Value);
}
catch { }
}
return(true);
}
return(false);
}
/// <summary>Gets the route information.</summary>
/// <param name="context">The context.</param>
/// <param name="resolver">The resolver.</param>
/// <param name="routes">The routes.</param>
/// <param name="defaultRequestConfiguration">The default request configuration.</param>
/// <returns></returns>
private static async Task <ApiRoutingItem> GetRoutingItem(this ApiRequestContext context,
IUriRouteResolver resolver,
IApiRoutingTable routes,
IDeepSleepRequestConfiguration defaultRequestConfiguration)
{
// -----------------------------------------------------------------
// We want to trick the routing engine to treat HEAD requests as GET
// http://tools.ietf.org/html/rfc7231#section-4.3.2
// -----------------------------------------------------------------
ApiRoutingItem routeInfo;
if (context.Request.Method.In(StringComparison.InvariantCultureIgnoreCase, "HEAD"))
{
routeInfo = await resolver.MatchRoute(
routes,
"HEAD",
context.Request.Path).ConfigureAwait(false);
if (routeInfo == null)
{
routeInfo = await resolver.MatchRoute(
routes,
"GET",
context.Request.Path).ConfigureAwait(false);
if (routeInfo != null)
{
var enableHeadForGetRequests = routeInfo.Configuration?.EnableHeadForGetRequests
?? defaultRequestConfiguration?.EnableHeadForGetRequests
?? ApiRequestContext.GetDefaultRequestConfiguration().EnableHeadForGetRequests
?? true;
if (!enableHeadForGetRequests)
{
routeInfo = null;
}
}
}
}
else if (context.Request.IsCorsPreflightRequest())
{
if (context.Request.CrossOriginRequest.AccessControlRequestMethod.In(StringComparison.InvariantCultureIgnoreCase, "HEAD"))
{
routeInfo = await resolver.MatchRoute(
routes,
context.Request.CrossOriginRequest.AccessControlRequestMethod,
context.Request.Path).ConfigureAwait(false);
if (routeInfo == null)
{
routeInfo = await resolver.MatchRoute(
routes,
"GET",
context.Request.Path).ConfigureAwait(false);
if (routeInfo != null)
{
var enableHeadForGetRequests = routeInfo.Configuration?.EnableHeadForGetRequests
?? defaultRequestConfiguration?.EnableHeadForGetRequests
?? ApiRequestContext.GetDefaultRequestConfiguration().EnableHeadForGetRequests
?? true;
if (!enableHeadForGetRequests)
{
routeInfo = null;
}
}
}
}
else
{
routeInfo = await resolver.MatchRoute(
routes,
context.Request.CrossOriginRequest.AccessControlRequestMethod,
context.Request.Path).ConfigureAwait(false);
}
}
else
{
routeInfo = await resolver.MatchRoute(
routes,
context.Request.Method,
context.Request.Path).ConfigureAwait(false);
}
return(routeInfo);
}
/// <summary>Processes the HTTP request cross origin resource sharing preflight.</summary>
/// <param name="context">The context.</param>
/// <param name="routes">The routes.</param>
/// <param name="resolver">The resolver.</param>
/// <param name="defaultRequestConfiguration">The default request configuration.</param>
/// <returns></returns>
internal static async Task <bool> ProcessHttpRequestCrossOriginResourceSharingPreflight(
this ApiRequestContext context,
IApiRoutingTable routes,
IUriRouteResolver resolver,
IDeepSleepRequestConfiguration defaultRequestConfiguration)
{
if (!context.RequestAborted.IsCancellationRequested)
{
if (context.Request?.IsCorsPreflightRequest() ?? false)
{
var methods = (context.Routing?.Template?.Locations ?? new List <ApiEndpointLocation>())
.Where(r => !string.IsNullOrWhiteSpace(r.HttpMethod))
.Select(r => r.HttpMethod.ToUpper())
.Distinct()
.ToList();
// Need to include the auto-enabled HEAD method if configured on the get endpoint (if available)
var hasGet = methods.FirstOrDefault(m => m.Equals("GET", StringComparison.InvariantCultureIgnoreCase)) != null;
if (hasGet)
{
var hasHead = methods.FirstOrDefault(m => m.Equals("HEAD", StringComparison.InvariantCultureIgnoreCase)) != null;
if (!hasHead)
{
if (resolver != null)
{
var getMatch = await resolver.MatchRoute(
routes,
"GET",
context.Request.Path).ConfigureAwait(false);
if (getMatch != null)
{
var enableHeadForGetRequests = getMatch.Configuration?.EnableHeadForGetRequests
?? defaultRequestConfiguration?.EnableHeadForGetRequests
?? ApiRequestContext.GetDefaultRequestConfiguration().EnableHeadForGetRequests
?? true;
if (enableHeadForGetRequests)
{
methods.Add("HEAD");
}
}
}
}
}
context.Response.StatusCode = 200;
context.Response.AddHeader("Access-Control-Allow-Methods", string.Join(", ", methods).Trim());
if (!string.IsNullOrWhiteSpace(context.Request?.CrossOriginRequest?.AccessControlRequestHeaders))
{
var allowHeaders = (context.Configuration?.CrossOriginConfig?.AllowedHeaders ?? new string[] { })
.Distinct()
.Where(i => !string.IsNullOrWhiteSpace(i))
.Select(i => i.Trim())
.ToList();
if (allowHeaders.Count > 0 && allowHeaders.Contains("*"))
{
context.Response.AddHeader("Access-Control-Allow-Headers", context.Request.CrossOriginRequest.AccessControlRequestHeaders);
}
else
{
context.Response.AddHeader("Access-Control-Allow-Headers", string.Join(", ", allowHeaders));
}
}
if (context.Configuration?.CrossOriginConfig?.MaxAgeSeconds.HasValue ?? false)
{
context.Response.AddHeader("Access-Control-Max-Age", $"{context.Configuration.CrossOriginConfig.MaxAgeSeconds.Value}");
}
return(false);
}
return(true);
}
return(false);
}
