private static bool TryExpandUriParameters(IHttpRoute route, string routeTemplate, ICollection <ApiParameterDescription> parameterDescriptions, out string expandedRouteTemplate)
{
HttpParsedRoute parsedRoute = HttpRouteParser.Parse(routeTemplate);
Dictionary <string, object> parameterValuesForRoute = new Dictionary <string, object>();
foreach (ApiParameterDescription parameterDescriptor in parameterDescriptions)
{
Type parameterType = parameterDescriptor.ParameterDescriptor.ParameterType;
if (parameterDescriptor.Source == ApiParameterSource.FromUri && TypeHelper.IsSimpleUnderlyingType(parameterType))
{
parameterValuesForRoute.Add(parameterDescriptor.Name, "{" + parameterDescriptor.Name + "}");
}
}
BoundRouteTemplate boundRouteTemplate = parsedRoute.Bind(null, parameterValuesForRoute, new HttpRouteValueDictionary(route.Defaults), new HttpRouteValueDictionary(route.Constraints));
if (boundRouteTemplate == null)
{
expandedRouteTemplate = null;
return(false);
}
expandedRouteTemplate = Uri.UnescapeDataString(boundRouteTemplate.BoundTemplate);
return(true);
}
private void PopulateActionDescriptions(HttpActionDescriptor actionDescriptor, IHttpRoute route, string localPath, Collection <ApiDescription> apiDescriptions)
{
string apiDocumentation = GetApiDocumentation(actionDescriptor);
HttpParsedRoute parsedRoute = HttpRouteParser.Parse(localPath);
// parameters
IList <ApiParameterDescription> parameterDescriptions = CreateParameterDescriptions(actionDescriptor, parsedRoute, route.Defaults);
// expand all parameter variables
string finalPath;
if (!TryExpandUriParameters(route, parsedRoute, parameterDescriptions, out finalPath))
{
// the action cannot be reached due to parameter mismatch, e.g. routeTemplate = "/users/{name}" and GetUsers(id)
return;
}
// request formatters
ApiParameterDescription bodyParameter = parameterDescriptions.FirstOrDefault(description => description.Source == ApiParameterSource.FromBody);
IEnumerable <MediaTypeFormatter> supportedRequestBodyFormatters = bodyParameter != null?
actionDescriptor.Configuration.Formatters.Where(f => f.CanReadType(bodyParameter.ParameterDescriptor.ParameterType)) :
Enumerable.Empty <MediaTypeFormatter>();
// response formatters
ResponseDescription responseDescription = CreateResponseDescription(actionDescriptor);
Type returnType = responseDescription.ResponseType ?? responseDescription.DeclaredType;
IEnumerable <MediaTypeFormatter> supportedResponseFormatters = returnType != null?
actionDescriptor.Configuration.Formatters.Where(f => f.CanWriteType(returnType)) :
Enumerable.Empty <MediaTypeFormatter>();
// Replacing the formatter tracers with formatters if tracers are present.
supportedRequestBodyFormatters = GetInnerFormatters(supportedRequestBodyFormatters);
supportedResponseFormatters = GetInnerFormatters(supportedResponseFormatters);
// get HttpMethods supported by an action. Usually there is one HttpMethod per action but we allow multiple of them per action as well.
IList <HttpMethod> supportedMethods = GetHttpMethodsSupportedByAction(route, actionDescriptor);
foreach (HttpMethod method in supportedMethods)
{
apiDescriptions.Add(new ApiDescription
{
Documentation = apiDocumentation,
HttpMethod = method,
RelativePath = finalPath,
ActionDescriptor = actionDescriptor,
Route = route,
SupportedResponseFormatters = new Collection <MediaTypeFormatter>(supportedResponseFormatters.ToList()),
SupportedRequestBodyFormatters = new Collection <MediaTypeFormatter>(supportedRequestBodyFormatters.ToList()),
ParameterDescriptions = new Collection <ApiParameterDescription>(parameterDescriptions),
ResponseDescription = responseDescription
});
}
}
private static decimal Compute(string template)
{
DefaultInlineConstraintResolver resolver = new DefaultInlineConstraintResolver();
HttpRouteValueDictionary defaults = new HttpRouteValueDictionary();
HttpRouteValueDictionary constraints = new HttpRouteValueDictionary();
string standardRouteTemplate = InlineRouteTemplateParser.ParseRouteTemplate(template,
defaults, constraints, new DefaultInlineConstraintResolver());
HttpParsedRoute parsedRoute = HttpRouteParser.Parse(standardRouteTemplate);
return(RoutePrecedence.Compute(parsedRoute, constraints));
}