org.apereo.openlrs.XAPIRequestValidationFilter.java Source code

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Here is the source code for org.apereo.openlrs.XAPIRequestValidationFilter.java

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/**
 * Copyright 2014 Unicon (R) Licensed under the
 * Educational Community 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.osedu.org/licenses/ECL-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 org.apereo.openlrs;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.OncePerRequestFilter;

/**
 * @author ggilbert
 *
 */
@Component
public class XAPIRequestValidationFilter extends OncePerRequestFilter {

    private Logger log = Logger.getLogger(XAPIRequestValidationFilter.class);

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response,
            FilterChain filterChain) throws ServletException, IOException {
        String versionHeader = request.getHeader(Constants.XAPI_VERSION_HEADER);

        if (StringUtils.isNotBlank(versionHeader)) {
            // for now we are just checking for the header
            // in the future we'll deal with specific versioning checking
            filterChain.doFilter(request, response);
        } else {
            log.warn("Request missing XAPI VERSION HEADER");
            response.sendError(400, "Missing " + Constants.XAPI_VERSION_HEADER + " Header");
        }

    }

}