Tomcat example source code file (DiskFileUpload.java)

This example Tomcat source code file (DiskFileUpload.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

defaultfileitemfactory, defaultfileitemfactory, diskfileupload, diskfileupload, file, file, fileitem, fileitemfactory, fileuploadbase, fileuploadexception, http, io, list, request, response, servlet, string, string, util

The Tomcat DiskFileUpload.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.tomcat.util.http.fileupload;


import java.io.File;
import java.util.List;
import javax.servlet.http.HttpServletRequest;


/**
 * <p>High level API for processing file uploads.

 *
 * <p>This class handles multiple files per single HTML widget, sent using
 * <code>multipart/mixed encoding type, as specified by
 * <a href="http://www.ietf.org/rfc/rfc1867.txt">RFC 1867.  Use {@link
 * #parseRequest(HttpServletRequest)} to acquire a list of {@link
 * org.apache.tomcat.util.http.fileupload.FileItem}s associated with a given HTML
 * widget.</p>
 *
 * <p>Individual parts will be stored in temporary disk storage or in memory,
 * depending on their size, and will be available as {@link
 * org.apache.tomcat.util.http.fileupload.FileItem}s.</p>
 *
 * @author <a href="mailto:Rafal.Krzewski@e-point.pl">Rafal Krzewski
 * @author <a href="mailto:dlr@collab.net">Daniel Rall
 * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl
 * @author <a href="mailto:jmcnally@collab.net">John McNally
 * @author <a href="mailto:martinc@apache.org">Martin Cooper
 * @author Sean C. Sullivan
 *
 * @version $Id: DiskFileUpload.java 467222 2006-10-24 03:17:11Z markt $
 */
public class DiskFileUpload
    extends FileUploadBase
 {

    // ----------------------------------------------------------- Data members


    /**
     * The factory to use to create new form items.
     */
    private DefaultFileItemFactory fileItemFactory;


    // ----------------------------------------------------------- Constructors


    /**
     * Constructs an instance of this class which uses the default factory to
     * create <code>FileItem instances.
     *
     * @see #DiskFileUpload(DefaultFileItemFactory fileItemFactory)
     */
    public DiskFileUpload()
    {
        super();
        this.fileItemFactory = new DefaultFileItemFactory();
    }


    /**
     * Constructs an instance of this class which uses the supplied factory to
     * create <code>FileItem instances.
     *
     * @see #DiskFileUpload()
     */
    public DiskFileUpload(DefaultFileItemFactory fileItemFactory)
    {
        super();
        this.fileItemFactory = fileItemFactory;
    }


    // ----------------------------------------------------- Property accessors


    /**
     * Returns the factory class used when creating file items.
     *
     * @return The factory class for new file items.
     */
    public FileItemFactory getFileItemFactory()
    {
        return fileItemFactory;
    }


    /**
     * Sets the factory class to use when creating file items. The factory must
     * be an instance of <code>DefaultFileItemFactory or a subclass
     * thereof, or else a <code>ClassCastException will be thrown.
     *
     * @param factory The factory class for new file items.
     */
    public void setFileItemFactory(FileItemFactory factory)
    {
        this.fileItemFactory = (DefaultFileItemFactory) factory;
    }


    /**
     * Returns the size threshold beyond which files are written directly to
     * disk.
     *
     * @return The size threshold, in bytes.
     *
     * @see #setSizeThreshold(int)
     */
    public int getSizeThreshold()
    {
        return fileItemFactory.getSizeThreshold();
    }


    /**
     * Sets the size threshold beyond which files are written directly to disk.
     *
     * @param sizeThreshold The size threshold, in bytes.
     *
     * @see #getSizeThreshold()
     */
    public void setSizeThreshold(int sizeThreshold)
    {
        fileItemFactory.setSizeThreshold(sizeThreshold);
    }


    /**
     * Returns the location used to temporarily store files that are larger
     * than the configured size threshold.
     *
     * @return The path to the temporary file location.
     *
     * @see #setRepositoryPath(String)
     */
    public String getRepositoryPath()
    {
        return fileItemFactory.getRepository().getPath();
    }


    /**
     * Sets the location used to temporarily store files that are larger
     * than the configured size threshold.
     *
     * @param repositoryPath The path to the temporary file location.
     *
     * @see #getRepositoryPath()
     */
    public void setRepositoryPath(String repositoryPath)
    {
        fileItemFactory.setRepository(new File(repositoryPath));
    }


    // --------------------------------------------------------- Public methods


    /**
     * Processes an <a href="http://www.ietf.org/rfc/rfc1867.txt">RFC 1867
     * compliant <code>multipart/form-data stream. If files are stored
     * on disk, the path is given by <code>getRepository().
     *
     * @param req           The servlet request to be parsed. Must be non-null.
     * @param sizeThreshold The max size in bytes to be stored in memory.
     * @param sizeMax       The maximum allowed upload size, in bytes.
     * @param path          The location where the files should be stored.
     *
     * @return A list of <code>FileItem instances parsed from the
     *         request, in the order that they were transmitted.
     *
     * @exception FileUploadException if there are problems reading/parsing
     *                                the request or storing files.
     */
    public List /* FileItem */ parseRequest(HttpServletRequest req,
                                            int sizeThreshold,
                                            long sizeMax, String path)
        throws FileUploadException
    {
        setSizeThreshold(sizeThreshold);
        setSizeMax(sizeMax);
        setRepositoryPath(path);
        return parseRequest(req);
    }

}