001package ca.uhn.fhir.jpa.subscription.module.subscriber.websocket;
002
003/*-
004 * #%L
005 * HAPI FHIR Subscription Server
006 * %%
007 * Copyright (C) 2014 - 2020 University Health Network
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import ca.uhn.fhir.jpa.subscription.module.CanonicalSubscriptionChannelType;
024import ca.uhn.fhir.jpa.subscription.module.cache.ActiveSubscription;
025import ca.uhn.fhir.jpa.subscription.module.cache.SubscriptionRegistry;
026import com.sun.istack.NotNull;
027import org.hl7.fhir.r4.model.IdType;
028import org.slf4j.Logger;
029import org.slf4j.LoggerFactory;
030import org.springframework.beans.factory.annotation.Autowired;
031import org.springframework.stereotype.Service;
032
033@Service
034public class WebsocketConnectionValidator {
035        private static Logger ourLog = LoggerFactory.getLogger(WebsocketConnectionValidator.class);
036
037        @Autowired
038        SubscriptionRegistry mySubscriptionRegistry;
039
040
041        public WebsocketValidationResponse validate(@NotNull IdType id) {
042                if (!id.hasIdPart() || !id.isIdPartValid()) {
043                        return WebsocketValidationResponse.INVALID_RESPONSE("Invalid bind request - No ID included: " + id.getValue());
044                }
045
046                if (!id.hasResourceType()) {
047                        id = id.withResourceType("Subscription");
048                }
049
050                ActiveSubscription activeSubscription = mySubscriptionRegistry.get(id.getIdPart());
051
052                if (activeSubscription == null) {
053                        return WebsocketValidationResponse.INVALID_RESPONSE("Invalid bind request - Unknown subscription: " + id.getValue());
054                }
055
056                if (activeSubscription.getSubscription().getChannelType() != CanonicalSubscriptionChannelType.WEBSOCKET) {
057                        return WebsocketValidationResponse.INVALID_RESPONSE("Subscription " + id.getValue() + " is not a " + CanonicalSubscriptionChannelType.WEBSOCKET + " subscription");
058                }
059
060                return WebsocketValidationResponse.VALID_RESPONSE(activeSubscription);
061        }
062}