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 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 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 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 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 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 }