org.hdiv.web.multipart.HdivCommonsMultipartResolver.java Source code

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Here is the source code for org.hdiv.web.multipart.HdivCommonsMultipartResolver.java

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/**
 * Copyright 2005-2011 hdiv.org
 *
 * 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 org.hdiv.web.multipart;

import javax.servlet.http.HttpServletRequest;

import org.hdiv.config.multipart.IMultipartConfig;
import org.hdiv.config.multipart.exception.HdivMultipartException;
import org.hdiv.filter.RequestWrapper;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.util.WebUtils;

/**
 * MultipartResolver to use instead of CommonsMultipartResolver.
 * 
 * @author Gotzon Illarramendi
 */
public class HdivCommonsMultipartResolver extends CommonsMultipartResolver {

    /*
     * (non-Javadoc)
     * 
     * @see org.springframework.web.multipart.commons.CommonsMultipartResolver#
     * resolveMultipart(javax.servlet.http.HttpServletRequest)
     */
    @Override
    public MultipartHttpServletRequest resolveMultipart(HttpServletRequest request) throws MultipartException {

        HdivMultipartException multipartException = (HdivMultipartException) request
                .getAttribute(IMultipartConfig.FILEUPLOAD_EXCEPTION);
        if (multipartException != null) {
            Exception orig = multipartException.getOriginal();
            if (orig instanceof MultipartException) {
                throw (MultipartException) orig;
            } else {
                throw new MultipartException("Could not parse multipart servlet request", orig);
            }
        }

        // If MultipartHttpServletRequest instance is present in request wrappers path, don't call to MultipartResolver
        MultipartHttpServletRequest original = WebUtils.getNativeRequest(request,
                MultipartHttpServletRequest.class);
        if (original != null) {

            // Use MultipartHttpServletRequestWrapper to maintain MultipartHttpServletRequest in first place
            // and obtains parameter values from RequestWrapper, with real values with confidentiality activated
            RequestWrapper requestWrapper = WebUtils.getNativeRequest(request, RequestWrapper.class);
            return new MultipartHttpServletRequestWrapper(request, requestWrapper, original);
        }

        // If MultipartHttpServletRequest instance is not present, parse multipart request
        return super.resolveMultipart(request);
    }

}