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 */
016 package org.opengion.hayabusa.servlet.multipart;
017
018 import org.opengion.fukurou.util.Closer ;
019
020 import java.io.IOException;
021
022 import java.util.List;
023 import java.util.ArrayList;
024 import java.util.Locale ;
025
026 import javax.servlet.http.HttpServletRequest;
027 import javax.servlet.ServletInputStream;
028
029 /**
030 * ファイルア??ロード時のマルチパート???パ?サーです?
031 *
032 * @og.group そ?他機?
033 *
034 * @version 4.0
035 * @author Kazuhiko Hasegawa
036 * @since JDK5.0,
037 */
038 public 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???パ?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) ?容量オーバ?時?エラーメ?ージ変更
050 * @og.rev 5.5.2.6 (2012/05/25) maxSize で?,また?マイナスで無制?
051 *
052 * @param req HttpServletRequestオブジェク?
053 * @param maxSize ?容?0,また?マイナスで無制?
054 * @throws IOException 入出力エラーが発生したと?
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();
060
061 if(type1 == null && type2 != null) {
062 type = type2;
063 }
064 else if(type2 == null && type1 != null) {
065 type = type1;
066 }
067
068 else if(type1 != null && type2 != null) {
069 type = (type1.length() > type2.length() ? type1 : type2);
070 }
071
072 if(type == null ||
073 !type.toLowerCase(Locale.JAPAN).startsWith("multipart/form-data")) {
074 throw new IOException("Posted content type isn't multipart/form-data");
075 }
076
077 int length = req.getContentLength();
078 // 5.5.2.6 (2012/05/25) maxSize で?,また?マイナスで無制?
079 // if(length > maxSize) {
080 if( maxSize > 0 && length > maxSize ) {
081 // throw new IOException("Posted content length of " + length +
082 // " exceeds limit of " + maxSize);
083 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?す?"
084 + " 登録ファイル=" + ( length / 1024 / 1024 ) + "MB" ); // 5.3.7.0 (2011/07/01)
085 }
086
087 // 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
088 String bound = extractBoundary(type);
089 if(bound == null) {
090 throw new IOException("Separation boundary was not specified");
091 }
092
093 this.in = req.getInputStream();
094 this.boundary = bound;
095
096 String line = readLine();
097 if(line == null) {
098 throw new IOException("Corrupt form data: premature ending");
099 }
100
101 if(!line.startsWith(boundary)) {
102 throw new IOException("Corrupt form data: no leading boundary: " +
103 line + " != " + boundary);
104 }
105 }
106
107 /**
108 * エンコードを設定します?
109 *
110 * @param encoding エンコー?
111 */
112 public void setEncoding( final String encoding ) {
113 this.encoding = encoding;
114 }
115
116 /**
117 * 次のパ?トを読み取ります?
118 *
119 * @og.rev 3.5.6.2 (2004/07/05) ??の連結にStringBuilderを使用します?
120 *
121 * @return 次のパ??
122 * @throws IOException 入出力エラーが発生したと?
123 */
124 public Part readNextPart() throws IOException {
125 if(lastFilePart != null) {
126 Closer.ioClose( lastFilePart.getInputStream() ); // 4.0.0 (2006/01/31) close 処?の IOException を無?
127 lastFilePart = null;
128 }
129
130 List<String> headers = new ArrayList<String>();
131
132 String line = readLine();
133 if(line == null) {
134 return null;
135 }
136 else if(line.length() == 0) {
137 return null;
138 }
139
140 while (line != null && line.length() > 0) {
141 String nextLine = null;
142 boolean getNextLine = true;
143 StringBuilder buf = new StringBuilder( 100 );
144 buf.append( line );
145 while (getNextLine) {
146 nextLine = readLine();
147 if(nextLine != null
148 && (nextLine.startsWith(" ")
149 || nextLine.startsWith("\t"))) {
150 buf.append( nextLine );
151 }
152 else {
153 getNextLine = false;
154 }
155 }
156
157 headers.add(buf.toString());
158 line = nextLine;
159 }
160
161 if(line == null) {
162 return null;
163 }
164
165 String name = null;
166 String filename = null;
167 String origname = null;
168 String contentType = "text/plain";
169
170 for( String headerline : headers ) {
171 if(headerline.toLowerCase(Locale.JAPAN).startsWith("content-disposition:")) {
172 String[] dispInfo = extractDispositionInfo(headerline);
173
174 name = dispInfo[1];
175 filename = dispInfo[2];
176 origname = dispInfo[3];
177 }
178 else if(headerline.toLowerCase(Locale.JAPAN).startsWith("content-type:")) {
179 String type = extractContentType(headerline);
180 if(type != null) {
181 contentType = type;
182 }
183 }
184 }
185
186 if(filename == null) {
187 return new ParamPart(name, in, boundary, encoding);
188 }
189 else {
190 if( "".equals( filename ) ) {
191 filename = null;
192 }
193 lastFilePart = new FilePart(name,in,boundary,contentType,filename,origname);
194 return lastFilePart;
195 }
196 }
197
198 /**
199 * ローカル変数「?」アクセス可能なフィールドを返します?
200 *
201 * @param line ??
202 *
203 * @return ???
204 * @see org.opengion.hayabusa.servlet.multipart.MultipartParser
205 */
206 private String extractBoundary( final String line ) {
207 // 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
208 int index = line.lastIndexOf("boundary=");
209 if(index == -1) {
210 return null;
211 }
212 String bound = line.substring(index + 9);
213 if(bound.charAt(0) == '"') {
214 index = bound.lastIndexOf('"');
215 bound = bound.substring(1, index);
216 }
217
218 bound = "--" + bound;
219
220 return bound;
221 }
222
223 /**
224 * コン?????を返します?
225 *
226 * @param origline ???
227 *
228 * @return コン?????配?
229 * @throws IOException 入出力エラーが発生したと?
230 */
231 private String[] extractDispositionInfo( final String origline ) throws IOException {
232 String[] retval = new String[4];
233
234 String line = origline.toLowerCase(Locale.JAPAN);
235
236 int start = line.indexOf("content-disposition: ");
237 int end = line.indexOf(';');
238 if(start == -1 || end == -1) {
239 throw new IOException("Content disposition corrupt: " + origline);
240 }
241 String disposition = line.substring(start + 21, end);
242 if(!"form-data".equals(disposition)) {
243 throw new IOException("Invalid content disposition: " + disposition);
244 }
245
246 start = line.indexOf("name=\"", end); // start at last semicolon
247 end = line.indexOf("\"", start + 7); // skip name=\"
248 if(start == -1 || end == -1) {
249 throw new IOException("Content disposition corrupt: " + origline);
250 }
251 String name = origline.substring(start + 6, end);
252
253 String filename = null;
254 String origname = null;
255 start = line.indexOf("filename=\"", end + 2); // start after name
256 end = line.indexOf("\"", start + 10); // skip filename=\"
257 if(start != -1 && end != -1) { // note the !=
258 filename = origline.substring(start + 10, end);
259 origname = filename;
260 int slash =
261 Math.max(filename.lastIndexOf('/'), filename.lastIndexOf('\\'));
262 if(slash > -1) {
263 filename = filename.substring(slash + 1); // past last slash
264 }
265 }
266
267 retval[0] = disposition;
268 retval[1] = name;
269 retval[2] = filename;
270 retval[3] = origname;
271 return retval;
272 }
273
274 /**
275 * コン??イプ???を返します?
276 *
277 * @param origline ???
278 *
279 * @return コン??イプ???
280 * @throws IOException 入出力エラーが発生したと?
281 */
282 private String extractContentType( final String origline ) throws IOException {
283 String contentType = null;
284
285 String line = origline.toLowerCase(Locale.JAPAN);
286
287 if(line.startsWith("content-type")) {
288 int start = line.indexOf(' ');
289 if(start == -1) {
290 throw new IOException("Content type corrupt: " + origline);
291 }
292 contentType = line.substring(start + 1);
293 }
294 else if(line.length() > 0) { // no content type, so should be empty
295 throw new IOException("Malformed line after disposition: " + origline);
296 }
297
298 return contentType;
299 }
300
301 /**
302 * 行を読み取ります?
303 *
304 * @return 読み取られた?行?
305 * @throws IOException 入出力エラーが発生したと?
306 */
307 private String readLine() throws IOException {
308 StringBuilder sbuf = new StringBuilder();
309 int result;
310
311 do {
312 result = in.readLine(buf, 0, buf.length);
313 if(result != -1) {
314 sbuf.append(new String(buf, 0, result, encoding));
315 }
316 } while (result == buf.length);
317
318 if(sbuf.length() == 0) {
319 return null;
320 }
321
322 // 4.0.0 (2005/01/31) The method StringBuilder.setLength() should be avoided in favor of creating a new StringBuilder.
323 String rtn = sbuf.toString();
324 int len = sbuf.length();
325 if(len >= 2 && sbuf.charAt(len - 2) == '\r') {
326 rtn = rtn.substring(0,len - 2);
327 }
328 else if(len >= 1 && sbuf.charAt(len - 1) == '\n') {
329 rtn = rtn.substring(0,len - 1);
330 }
331 return rtn ;
332 }
333 }