fix handling no match access selected path #467 (#468)

* fix handling no match access selected path

* remove obsolete field

request.go

@@ -13,11 +13,10 @@ var defaultRequestContentType string
 
 // Request is a wrapper for a http Request that provides convenience methods
 type Request struct {
-	Request           *http.Request
-	pathParameters    map[string]string
-	attributes        map[string]interface{} // for storing request-scoped values
-	selectedRoutePath string                 // root path + route path that matched the request, e.g. /meetings/{id}/attendees
-	selectedRoute     *Route
+	Request        *http.Request
+	pathParameters map[string]string
+	attributes     map[string]interface{} // for storing request-scoped values
+	selectedRoute  *Route                 // is nil when no route was matched
 }
 
 func NewRequest(httpRequest *http.Request) *Request {
@@ -114,11 +113,20 @@ func (r Request) Attribute(name string) interface{} {
 }
 
 // SelectedRoutePath root path + route path that matched the request, e.g. /meetings/{id}/attendees
+// If no route was matched then return an empty string.
 func (r Request) SelectedRoutePath() string {
+	if r.selectedRoute == nil {
+		return ""
+	}
+	// skip creating an accessor
 	return r.selectedRoute.Path
 }
 
 // SelectedRoute returns a reader to access the selected Route by the container
+// Returns nil if no route was matched.
 func (r Request) SelectedRoute() RouteReader {
+	if r.selectedRoute == nil {
+		return nil
+	}
 	return routeAccessor{route: r.selectedRoute}
 }

web_service_test.go

@@ -383,6 +383,10 @@ func newSelectedRouteTestingService() *WebService {
 }
 
 func selectedRouteChecker(req *Request, resp *Response) {
+	if req.SelectedRoute() == nil {
+		resp.InternalServerError()
+		return
+	}
 	if req.SelectedRoutePath() != pathGetFriends {
 		resp.InternalServerError()
 	}