gt: 		StringBuilder sb = new StringBuilder();
context: /**
   * OpenKM, Open Document Management System (http://www.openkm.com)
   * Copyright (c) 2006-2017  Paco Avila & Josep Llort
   * <p>
   * No bytes were intentionally harmed during the development of this application.
   * <p>
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   * <p>
   * 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 General Public License for more details.
   * <p>
   * You should have received a copy of the GNU General Public License along
   * with this program; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   */
  
  package com.openkm.webdav.resource;
  
  import com.bradmcevoy.http.*;
  import com.bradmcevoy.http.Request.Method;
  import com.bradmcevoy.http.exceptions.BadRequestException;
  import com.bradmcevoy.http.exceptions.ConflictException;
  import com.bradmcevoy.http.exceptions.NotAuthorizedException;
  import com.bradmcevoy.http.webdav.PropPatchHandler.Fields;
  import com.openkm.api.OKMMail;
  import com.openkm.bean.Mail;
  import com.openkm.core.AccessDeniedException;
  import com.openkm.core.DatabaseException;
  import com.openkm.core.PathNotFoundException;
  import com.openkm.core.RepositoryException;
  import com.openkm.util.MailUtils;
  import com.openkm.util.PathUtils;
  import org.apache.commons.io.IOUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import javax.mail.MessagingException;
  import javax.mail.internet.MimeMessage;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.Date;
  import java.util.Map;
  
  public class MailResource implements CopyableResource, DeletableResource, GetableResource, MoveableResource,
  		PropFindableResource, PropPatchableResource, QuotaResource {
  	private static final Logger log = LoggerFactory.getLogger(MailResource.class);
  	private Mail mail;
  
  	public MailResource(Mail mail) {
  		this.mail = ResourceUtils.fixResourcePath(mail);
  	}
  
  	@Override
  	public String getUniqueId() {
  		return mail.getUuid();
  	}
  
  	@Override
  	public String getName() {
  		return PathUtils.getName(mail.getPath());
  	}
  
  	@Override
  	public Object authenticate(String user, String password) {
  		// log.debug("authenticate({}, {})", new Object[] { user, password });
  		return "OpenKM";
  	}
  
  	@Override
  	public boolean authorise(Request request, Method method, Auth auth) {
  		// log.debug("authorise({}, {}, {})", new Object[] { request.getAbsolutePath(), method.toString(),
  		// auth.getUser() });
  		return true;
  	}
  
  	@Override
  	public String getRealm() {
  		return ResourceFactoryImpl.REALM;
  	}
  
  	@Override
  	public Date getCreateDate() {
  		return mail.getCreated().getTime();
  	}
  
  	@Override
  	public Date getModifiedDate() {
  		return mail.getCreated().getTime();
  	}
  
  	@Override
  	public String checkRedirect(Request request) {
  		return null;
  	}
  
  	@Override
  	public Long getMaxAgeSeconds(Auth auth) {
  		return null;
  	}
  
  	@Override
  	public String getContentType(String accepts) {
  		if (mail.getAttachments().isEmpty()) {
  			return mail.getMimeType();
  		} else {
  			return "message/rfc822";
  		}
  	}
  
  	@Override
  	public Long getContentLength() {
  		return null;
  	}
  
  	@Override
  	public void sendContent(OutputStream out, Range range, Map<String, String> params, String contentType)
  			throws IOException, NotAuthorizedException, BadRequestException {
  		log.debug("sendContent({}, {})", params, contentType);
  
  		try {
  			String fixedMailPath = ResourceUtils.fixRepositoryPath(mail.getPath());
  			Mail mail = OKMMail.getInstance().getProperties(null, fixedMailPath);
  
  			if (mail.getAttachments().isEmpty()) {
  				IOUtils.write(mail.getContent(), out);
  			} else {
  				MimeMessage m = MailUtils.create(null, mail);
  				m.writeTo(out);
  				out.flush();
  			}
  		} catch (PathNotFoundException e) {
  			log.error("PathNotFoundException: " + e.getMessage(), e);
  			throw new RuntimeException("Failed to update content: " + mail.getPath());
  		} catch (AccessDeniedException e) {
  			log.error("AccessDeniedException: " + e.getMessage(), e);
  			throw new RuntimeException("Failed to update content: " + mail.getPath());
  		} catch (RepositoryException e) {
  			log.error("RepositoryException: " + e.getMessage(), e);
  			throw new RuntimeException("Failed to update content: " + mail.getPath());
  		} catch (DatabaseException e) {
  			log.error("DatabaseException: " + e.getMessage(), e);
  			throw new RuntimeException("Failed to update content: " + mail.getPath());
  		} catch (MessagingException e) {
  			log.error("MessagingException: " + e.getMessage(), e);
  			throw new RuntimeException("Failed to update content: " + mail.getPath());
  		}
  	}
  
  	@Override
  	public void delete() throws NotAuthorizedException, ConflictException, BadRequestException {
  		log.debug("delete()");
  
  		try {
  			String fixedMailPath = ResourceUtils.fixRepositoryPath(mail.getPath());
  			OKMMail.getInstance().delete(null, fixedMailPath);
  		} catch (Exception e) {
  			throw new ConflictException(this);
  		}
  	}
  
  	@Override
  	public void setProperties(Fields fields) {
  		// MIL-50: not implemented. Just to keep MS Office sweet
  	}
  
  	@Override
  	public void moveTo(CollectionResource newParent, String newName) throws ConflictException, NotAuthorizedException,
  			BadRequestException {
  		log.debug("moveTo({}, {})", newParent, newName);
  
  		if (newParent instanceof FolderResource) {
  			FolderResource newFldParent = (FolderResource) newParent;
  			String dstFolder = newFldParent.getFolder().getPath();
  			String srcFolder = PathUtils.getParent(mail.getPath());
  			String fixedMailPath = ResourceUtils.fixRepositoryPath(mail.getPath());
  
  			if (dstFolder.equals(srcFolder)) {
  				log.debug("moveTo - RENAME {} to {}", fixedMailPath, newName);
  
  				try {
  					mail = OKMMail.getInstance().rename(null, fixedMailPath, newName);
  				} catch (Exception e) {
  					throw new RuntimeException("Failed to rename to: " + newName);
  				}
  			} else {
  				String dstPath = newFldParent.getFolder().getPath();
  				String fixedDstPath = ResourceUtils.fixRepositoryPath(dstPath);
  				log.debug("moveTo - MOVE from {} to {}", fixedMailPath, fixedDstPath);
  
  				try {
  					OKMMail.getInstance().move(null, fixedMailPath, fixedDstPath);
  					mail.setPath(dstPath);
  				} catch (Exception e) {
  					throw new RuntimeException("Failed to move to: " + dstPath);
  				}
  			}
  		} else {
  			throw new RuntimeException("Destination is an unknown type. Must be a FsDirectoryResource, is a: "
  					+ newParent.getClass());
  		}
  	}
  
  	@Override
  	public void copyTo(CollectionResource newParent, String newName) throws NotAuthorizedException,
  			BadRequestException, ConflictException {
  		log.debug("copyTo({}, {})", newParent, newName);
  
  		if (newParent instanceof FolderResource) {
  			FolderResource newFldParent = (FolderResource) newParent;
  			String dstPath = newFldParent.getFolder().getPath() + "/" + newName;
  
  			try {
  				String fixedMailPath = ResourceUtils.fixRepositoryPath(mail.getPath());
  				OKMMail.getInstance().copy(null, fixedMailPath, dstPath);
  			} catch (Exception e) {
  				throw new RuntimeException("Failed to copy to:" + dstPath, e);
  			}
  		} else {
  			throw new RuntimeException("Destination is an unknown type. Must be a FolderResource, is a: "
  					+ newParent.getClass());
  		}
  	}
  
  	@Override
  	public Long getQuotaUsed() {
  		return new Long(0);
  	}
  
  	@Override
  	public Long getQuotaAvailable() {
  		return Long.MAX_VALUE;
  	}
  
  	@Override
  	public String toString() {
  