    001/*
    002 * Copyright (c) 2009 The openGion Project.
    003 *
    004 * Licensed under the Apache License, Version 2.0 (the "License");
    005 * you may not use this file except in compliance with the License.
    006 * You may obtain a copy of the License at
    007 *
    008 *     http://www.apache.org/licenses/LICENSE-2.0
    009 *
    010 * Unless required by applicable law or agreed to in writing, software
    011 * distributed under the License is distributed on an "AS IS" BASIS,
    012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
    013 * either express or implied. See the License for the specific language
    014 * governing permissions and limitations under the License.
    015 */
    016package org.opengion.hayabusa.servlet.multipart;
    017
    018import org.opengion.fukurou.util.Closer ;
    019
    020import java.io.IOException;
    021
    022import java.util.List;
    023import java.util.ArrayList;
    024import java.util.Locale ;
    025
    026import javax.servlet.http.HttpServletRequest;
    027import javax.servlet.ServletInputStream;
    028
    029/**
    030 * ファイルアップロード時のマルチパート処理のパーサーです。
    031 *
    032 * @og.group その他機能
    033 *
    034 * @version  4.0
    035 * @author   Kazuhiko Hasegawa
    036 * @since    JDK5.0,
    037 */
    038public class MultipartParser {
    039        private final ServletInputStream in;
    040        private final String boundary;
    041        private FilePart lastFilePart;
    042        private final byte[] buf = new byte[8 * 1024];
    043        private static final String DEFAULT_ENCODING = "MS932";
    044        private String encoding = DEFAULT_ENCODING;
    045
    046        /**
    047         * マルチパート処理のパーサーオブジェクトを構築する、コンストラクター
    048         *
    049         * @og.rev 5.3.7.0 (2011/07/01) 最大容量オーバー時のエラーメッセージ変更
    050         * @og.rev 5.5.2.6 (2012/05/25) maxSize で、0,またはマイナスで無制限
    051         *
    052         * @param       req             HttpServletRequestオブジェクト
    053         * @param       maxSize 最大容量(0,またはマイナスで無制限)
    054         * @throws IOException 入出力エラーが発生したとき
    055         */
    056        public MultipartParser( final HttpServletRequest req, final int maxSize ) throws IOException {
    057                String type = null;
    058                String type1 = req.getHeader("Content-Type");
    059                String type2 = req.getContentType();
    060System.out.println(type1);
    061System.out.println(type2);
    062                if(type1 == null && type2 != null) {
    063                        type = type2;
    064                }
    065                else if(type2 == null && type1 != null) {
    066                        type = type1;
    067                }
    068
    069                else if(type1 != null && type2 != null) {
    070                        type = (type1.length() > type2.length() ? type1 : type2);
    071                }
    072
    073                if(type == null ||
    074                                !type.toLowerCase(Locale.JAPAN).startsWith("multipart/form-data")) {
    075                        throw new IOException("Posted content type isn't multipart/form-data");
    076                }
    077
    078                int length = req.getContentLength();
    079                // 5.5.2.6 (2012/05/25) maxSize で、0,またはマイナスで無制限
    080//              if(length > maxSize) {
    081                if( maxSize > 0 && length > maxSize ) {
    082//                      throw new IOException("Posted content length of " + length +
    083//                                                                      " exceeds limit of " + maxSize);
    084                        throw new IOException("登録したファイルサイズが上限(" + ( maxSize / 1024 / 1024 ) + "MB)を越えています。"
    085                                                                        + " 登録ファイル=" + ( length / 1024 / 1024 ) + "MB" ); // 5.3.7.0 (2011/07/01)
    086                }
    087
    088                // 4.0.0 (2005/01/31) The local variable "boundary" shadows an accessible field with the same name and compatible type in class org.opengion.hayabusa.servlet.multipart.MultipartParser
    089                String bound = extractBoundary(type);
    090                if(bound == null) {
    091                        throw new IOException("Separation boundary was not specified");
    092                }
    093
    094                this.in = req.getInputStream();
    095                this.boundary = bound;
    096
    097                String line = readLine();
    098                if(line == null) {
    099                        throw new IOException("Corrupt form data: premature ending");
    100                }
    101
    102                if(!line.startsWith(boundary)) {
    103                        throw new IOException("Corrupt form data: no leading boundary: " +
    104                                                                                                                line + " != " + boundary);
    105                }
    106        }
    107
    108        /**
    109         * エンコードを設定します。
    110         *
    111         * @param  encoding エンコード
    112         */
    113        public void setEncoding( final String encoding ) {
    114                 this.encoding = encoding;
    115         }
    116
    117        /**
    118         * 次のパートを読み取ります。
    119         *
    120         * @og.rev 3.5.6.2 (2004/07/05) 文字列の連結にStringBuilderを使用します。
    121         *
    122         * @return      次のパート
    123         * @throws IOException 入出力エラーが発生したとき
    124         */
    125        public Part readNextPart() throws IOException {
    126                if(lastFilePart != null) {
    127                        Closer.ioClose( lastFilePart.getInputStream() );                // 4.0.0 (2006/01/31) close 処理時の IOException を無視
    128                        lastFilePart = null;
    129                }
    130
    131                List<String> headers = new ArrayList<String>();
    132
    133                String line = readLine();
    134                if(line == null) {
    135                        return null;
    136                }
    137                else if(line.length() == 0) {
    138                        return null;
    139                }
    140
    141                while (line != null && line.length() > 0) {
    142                        String nextLine = null;
    143                        boolean getNextLine = true;
    144                        StringBuilder buf = new StringBuilder( 100 );
    145                        buf.append( line );
    146                        while (getNextLine) {
    147                                nextLine = readLine();
    148                                if(nextLine != null
    149                                                && (nextLine.startsWith(" ")
    150                                                || nextLine.startsWith("\t"))) {
    151                                        buf.append( nextLine );
    152                                }
    153                                else {
    154                                        getNextLine = false;
    155                                }
    156                        }
    157
    158                        headers.add(buf.toString());
    159                        line = nextLine;
    160                }
    161
    162                if(line == null) {
    163                        return null;
    164                }
    165
    166                String name = null;
    167                String filename = null;
    168                String origname = null;
    169                String contentType = "text/plain";
    170
    171                for( String headerline : headers ) {
    172                        if(headerline.toLowerCase(Locale.JAPAN).startsWith("content-disposition:")) {
    173                                String[] dispInfo = extractDispositionInfo(headerline);
    174
    175                                name = dispInfo[1];
    176                                filename = dispInfo[2];
    177                                origname = dispInfo[3];
    178                        }
    179                        else if(headerline.toLowerCase(Locale.JAPAN).startsWith("content-type:")) {
    180                                String type = extractContentType(headerline);
    181                                if(type != null) {
    182                                        contentType = type;
    183                                }
    184                        }
    185                }
    186
    187                if(filename == null) {
    188                        return new ParamPart(name, in, boundary, encoding);
    189                }
    190                else {
    191                        if( "".equals( filename ) ) {
    192                                filename = null;
    193                        }
    194                        lastFilePart = new FilePart(name,in,boundary,contentType,filename,origname);
    195                        return lastFilePart;
    196                }
    197        }
    198
    199        /**
    200         * ローカル変数「境界」アクセス可能なフィールドを返します。
    201         *
    202         * @param       line    １行
    203         *
    204         * @return      境界文字列
    205         * @see         org.opengion.hayabusa.servlet.multipart.MultipartParser
    206         */
    207        private String extractBoundary( final String line ) {
    208                // 4.0.0 (2005/01/31) The local variable "boundary" shadows an accessible field with the same name and compatible type in class org.opengion.hayabusa.servlet.multipart.MultipartParser
    209                int index = line.lastIndexOf("boundary=");
    210                if(index == -1) {
    211                        return null;
    212                }
    213                String bound = line.substring(index + 9);
    214                if(bound.charAt(0) == '"') {
    215                        index = bound.lastIndexOf('"');
    216                        bound = bound.substring(1, index);
    217                }
    218
    219                bound = "--" + bound;
    220
    221                return bound;
    222        }
    223
    224        /**
    225         * コンテンツの情報を返します。
    226         *
    227         * @param       origline        元の行
    228         *
    229         * @return      コンテンツの情報配列
    230         * @throws IOException 入出力エラーが発生したとき
    231         */
    232        private String[] extractDispositionInfo( final String origline ) throws IOException {
    233                String[] retval = new String[4];
    234
    235                String line = origline.toLowerCase(Locale.JAPAN);
    236
    237                int start = line.indexOf("content-disposition: ");
    238                int end = line.indexOf(';');
    239                if(start == -1 || end == -1) {
    240                        throw new IOException("Content disposition corrupt: " + origline);
    241                }
    242                String disposition = line.substring(start + 21, end);
    243                if(!"form-data".equals(disposition)) {
    244                        throw new IOException("Invalid content disposition: " + disposition);
    245                }
    246
    247                start = line.indexOf("name=\"", end);   // start at last semicolon
    248                end = line.indexOf("\"", start + 7);     // skip name=\"
    249                if(start == -1 || end == -1) {
    250                        throw new IOException("Content disposition corrupt: " + origline);
    251                }
    252                String name = origline.substring(start + 6, end);
    253
    254                String filename = null;
    255                String origname = null;
    256                start = line.indexOf("filename=\"", end + 2);   // start after name
    257                end = line.indexOf("\"", start + 10);                                   // skip filename=\"
    258                if(start != -1 && end != -1) {                                                          // note the !=
    259                        filename = origline.substring(start + 10, end);
    260                        origname = filename;
    261                        int slash =
    262                                Math.max(filename.lastIndexOf('/'), filename.lastIndexOf('\\'));
    263                        if(slash > -1) {
    264                                filename = filename.substring(slash + 1);       // past last slash
    265                        }
    266                }
    267
    268                retval[0] = disposition;
    269                retval[1] = name;
    270                retval[2] = filename;
    271                retval[3] = origname;
    272                return retval;
    273        }
    274
    275        /**
    276         * コンテンツタイプの情報を返します。
    277         *
    278         * @param       origline        元の行
    279         *
    280         * @return      コンテンツタイプの情報
    281         * @throws IOException 入出力エラーが発生したとき
    282         */
    283        private String extractContentType( final String origline ) throws IOException {
    284                String contentType = null;
    285
    286                String line = origline.toLowerCase(Locale.JAPAN);
    287
    288                if(line.startsWith("content-type")) {
    289                        int start = line.indexOf(' ');
    290                        if(start == -1) {
    291                                throw new IOException("Content type corrupt: " + origline);
    292                        }
    293                        contentType = line.substring(start + 1);
    294                }
    295                else if(line.length() > 0) { // no content type, so should be empty
    296                        throw new IOException("Malformed line after disposition: " + origline);
    297                }
    298
    299                return contentType;
    300        }
    301
    302        /**
    303         * 行を読み取ります。
    304         *
    305         * @return      読み取られた１行分
    306         * @throws IOException 入出力エラーが発生したとき
    307         */
    308        private String readLine() throws IOException {
    309                StringBuilder sbuf = new StringBuilder();
    310                int result;
    311
    312                do {
    313                        result = in.readLine(buf, 0, buf.length);
    314                        if(result != -1) {
    315                                sbuf.append(new String(buf, 0, result, encoding));
    316                        }
    317                } while (result == buf.length);
    318
    319                if(sbuf.length() == 0) {
    320                        return null;
    321                }
    322
    323                // 4.0.0 (2005/01/31) The method StringBuilder.setLength() should be avoided in favor of creating a new StringBuilder.
    324                String rtn = sbuf.toString();
    325                int len = sbuf.length();
    326                if(len >= 2 && sbuf.charAt(len - 2) == '\r') {
    327                        rtn = rtn.substring(0,len - 2);
    328                }
    329                else if(len >= 1 && sbuf.charAt(len - 1) == '\n') {
    330                        rtn = rtn.substring(0,len - 1);
    331                }
    332                return rtn ;
    333        }
    334}