BulkPostCollectionHandler.java

/*
 * RESTHeart - the Web API for MongoDB
 * Copyright (C) SoftInstigate Srl
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.restheart.handlers.bulk;

import io.undertow.server.HttpServerExchange;
import org.bson.BsonArray;
import org.bson.BsonValue;
import org.restheart.db.BulkOperationResult;
import org.restheart.db.DocumentDAO;
import org.restheart.handlers.PipedHttpHandler;
import org.restheart.handlers.RequestContext;
import org.restheart.handlers.RequestContext.DOC_ID_TYPE;
import org.restheart.utils.HttpStatus;
import org.restheart.utils.ResponseHelper;

/**
 *
 * @author Andrea Di Cesare {@literal <andrea@softinstigate.com>}
 */
public class BulkPostCollectionHandler extends PipedHttpHandler {

    private final DocumentDAO documentDAO;

    /**
     * Creates a new instance of BulkPostCollectionHandler
     */
    public BulkPostCollectionHandler() {
        this(null, new DocumentDAO());
    }

    /**
     * Creates a new instance of BulkPostCollectionHandler
     *
     * @param documentDAO
     */
    public BulkPostCollectionHandler(DocumentDAO documentDAO) {
        this(null, new DocumentDAO());
    }

    /**
     * Creates a new instance of BulkPostCollectionHandler
     *
     * @param next
     */
    public BulkPostCollectionHandler(PipedHttpHandler next) {
        this(next, new DocumentDAO());
    }

    /**
     * Creates a new instance of BulkPostCollectionHandler
     *
     * @param next
     * @param documentDAO
     */
    public BulkPostCollectionHandler(PipedHttpHandler next, DocumentDAO documentDAO) {
        super(next);
        this.documentDAO = documentDAO;
    }

    /**
     *
     * @param exchange
     * @param context
     * @throws Exception
     */
    @Override
    public void handleRequest(HttpServerExchange exchange, RequestContext context) throws Exception {
        if (context.isInError()) {
            next(exchange, context);
            return;
        }
        
        BsonValue content = context.getContent();

        // expects an an array
        if (content == null || !content.isArray()) {
            throw new RuntimeException("error, this handler expects an array of objects");
        }

        BsonArray documents = content.asArray();

        if (!checkIds(exchange, context, documents)) {
            // if check fails, exchange has been closed
            return;
        }

        BulkOperationResult result = this.documentDAO
                .bulkUpsertDocumentsPost(context.getDBName(),
                        context.getCollectionName(),
                        documents,
                        context.getShardKey());

        context.setDbOperationResult(result);

        // inject the etag
        if (result.getEtag() != null) {
            ResponseHelper.injectEtagHeader(exchange, result.getEtag());
        }

        context.setResponseStatusCode(result.getHttpCode());

        BulkResultRepresentationFactory bprf = new BulkResultRepresentationFactory();

        context.setResponseContent(bprf.getRepresentation(
                exchange, context, result)
                .asBsonDocument());

        next(exchange, context);
    }

    private boolean checkIds(HttpServerExchange exchange, RequestContext context, BsonArray documents) throws Exception {
        boolean ret = true;

        for (BsonValue document : documents) {
            if (!checkId(exchange, context, document)) {
                ret = false;
                break;
            }
        }

        return ret;
    }

    private boolean checkId(HttpServerExchange exchange, RequestContext context, BsonValue document) throws Exception {
        if (document.isDocument()
                && document.asDocument().containsKey("_id")
                && document.asDocument().get("_id").isString()
                && RequestContext.isReservedResourceDocument(
                        context.getType(),
                        document.asDocument()
                                .get("_id").asString().getValue())) {
            ResponseHelper.endExchangeWithMessage(
                    exchange,
                    context,
                    HttpStatus.SC_FORBIDDEN,
                    "id is reserved: " + document.asDocument()
                            .get("_id").asString().getValue());
            next(exchange, context);
            return false;
        }

        if (document.isDocument()
                && document.asDocument().containsKey("_id")) {
            if (!(context.getDocIdType() == DOC_ID_TYPE.OID
                    || context.getDocIdType() == DOC_ID_TYPE.STRING_OID)) {
                ResponseHelper.endExchangeWithMessage(
                        exchange,
                        context,
                        HttpStatus.SC_NOT_ACCEPTABLE,
                        "_id in content body is mandatory for documents with id type " + context.getDocIdType().name());
                next(exchange, context);
                return false;
            }
        }

        return true;
    }
}