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/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.servicecomb.foundation.vertx;

import javax.ws.rs.core.Response.Status;

import org.apache.http.HttpHeaders;

import io.vertx.ext.web.RoutingContext;
import io.vertx.ext.web.handler.impl.BodyHandlerImpl;

/**
 * 扩展的BodyHandler
 * 只支持指定ContentType格式的body数据，关闭了文件上传能力
 */
public abstract class SimpleBodyHandler extends BodyHandlerImpl {

    @Override
    public void handle(RoutingContext context) {
        if (this.checkContentType(context)) {
            super.handle(context);
        }
    }

    protected boolean checkContentType(RoutingContext context) {
        String contentType = context.request().getHeader(HttpHeaders.CONTENT_TYPE);
        if (contentTypeSupported(contentType)) {
            return true;
        }
        Status status = Status.UNSUPPORTED_MEDIA_TYPE;
        context.response().setStatusCode(status.getStatusCode()).setStatusMessage(status.getReasonPhrase());
        context.response().end(String.format("Content-Type %s is not supported", contentType));
        return false;
    }

    protected abstract boolean contentTypeSupported(String contentType);

}