001/* ***** BEGIN LICENSE BLOCK *****
002 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
003 *
004 * The contents of this file are subject to the Mozilla Public License Version
005 * 1.1 (the "License"); you may not use this file except in compliance with
006 * the License. You may obtain a copy of the License at
007 * http://www.mozilla.org/MPL/
008 *
009 * Software distributed under the License is distributed on an "AS IS" basis,
010 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
011 * for the specific language governing rights and limitations under the
012 * License.
013 *
014 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
015 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
016 *
017 * The Initial Developer of the Original Code is
018 * Agfa Healthcare.
019 * Portions created by the Initial Developer are Copyright (C) 2011
020 * the Initial Developer. All Rights Reserved.
021 *
022 * Contributor(s):
023 * See @authors listed below
024 *
025 * Alternatively, the contents of this file may be used under the terms of
026 * either the GNU General Public License Version 2 or later (the "GPL"), or
027 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
028 * in which case the provisions of the GPL or the LGPL are applicable instead
029 * of those above. If you wish to allow use of your version of this file only
030 * under the terms of either the GPL or the LGPL, and not to allow others to
031 * use your version of this file under the terms of the MPL, indicate your
032 * decision by deleting the provisions above and replace them with the notice
033 * and other provisions required by the GPL or the LGPL. If you do not delete
034 * the provisions above, a recipient may use your version of this file under
035 * the terms of any one of the MPL, the GPL or the LGPL.
036 *
037 * ***** END LICENSE BLOCK ***** */
038package org.dcm4che3.mime;
039
040import java.io.EOFException;
041import java.io.IOException;
042import java.io.InputStream;
043
044/**
045 * @author Gunter Zeilinger <gunterze@gmail.com>
046 *
047 */
048public class MultipartParser {
049
050    public interface Handler {
051        void bodyPart(int partNumber, MultipartInputStream in) throws IOException;
052    };
053
054    private final String boundary;
055
056    public MultipartParser(String boundary) {
057        this.boundary = boundary;
058    }
059
060    @SuppressWarnings("resource")
061    public void parse(InputStream in, Handler handler) throws IOException {
062        new MultipartInputStream(in, "--" + boundary).skipAll(); // skip preamble
063        for (int i=1;;i++) {
064            int ch1 = in.read();
065            int ch2 = in.read();
066            if ((ch1 | ch2) < 0)
067                throw new EOFException();
068
069            if (ch1 == '-' && ch2 == '-')
070                break;
071
072            if (ch1 != '\r' || ch2 != '\n')
073                throw new IOException("missing CR/LF after boundary");
074
075            MultipartInputStream mis = new MultipartInputStream(in, "\r\n--" + boundary);
076            handler.bodyPart(i, mis);
077            mis.skipAll();
078        }
079    }
080}