J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.net.www.protocol.jar; |
| 27 | |
| 28 | import java.io.InputStream; |
| 29 | import java.io.IOException; |
| 30 | import java.io.FileNotFoundException; |
| 31 | import java.io.BufferedInputStream; |
| 32 | import java.net.URL; |
| 33 | import java.net.URLConnection; |
| 34 | import java.net.MalformedURLException; |
| 35 | import java.net.UnknownServiceException; |
| 36 | import java.util.Enumeration; |
| 37 | import java.util.Map; |
| 38 | import java.util.List; |
| 39 | import java.util.jar.JarEntry; |
| 40 | import java.util.jar.JarFile; |
| 41 | import java.util.jar.Manifest; |
| 42 | import java.security.Permission; |
| 43 | |
| 44 | /** |
| 45 | * @author Benjamin Renaud |
| 46 | * @since 1.2 |
| 47 | */ |
| 48 | public class JarURLConnection extends java.net.JarURLConnection { |
| 49 | |
| 50 | private static final boolean debug = false; |
| 51 | |
| 52 | /* the Jar file factory. It handles both retrieval and caching. |
| 53 | */ |
| 54 | private static JarFileFactory factory = new JarFileFactory(); |
| 55 | |
| 56 | /* the url for the Jar file */ |
| 57 | private URL jarFileURL; |
| 58 | |
| 59 | /* the permission to get this JAR file. This is the actual, ultimate, |
| 60 | * permission, returned by the jar file factory. |
| 61 | */ |
| 62 | private Permission permission; |
| 63 | |
| 64 | /* the url connection for the JAR file */ |
| 65 | private URLConnection jarFileURLConnection; |
| 66 | |
| 67 | /* the entry name, if any */ |
| 68 | private String entryName; |
| 69 | |
| 70 | /* the JarEntry */ |
| 71 | private JarEntry jarEntry; |
| 72 | |
| 73 | /* the jar file corresponding to this connection */ |
| 74 | private JarFile jarFile; |
| 75 | |
| 76 | /* the content type for this connection */ |
| 77 | private String contentType; |
| 78 | |
| 79 | public JarURLConnection(URL url, Handler handler) |
| 80 | throws MalformedURLException, IOException { |
| 81 | super(url); |
| 82 | |
| 83 | jarFileURL = getJarFileURL(); |
| 84 | jarFileURLConnection = jarFileURL.openConnection(); |
| 85 | entryName = getEntryName(); |
| 86 | } |
| 87 | |
| 88 | public JarFile getJarFile() throws IOException { |
| 89 | connect(); |
| 90 | return jarFile; |
| 91 | } |
| 92 | |
| 93 | public JarEntry getJarEntry() throws IOException { |
| 94 | connect(); |
| 95 | return jarEntry; |
| 96 | } |
| 97 | |
| 98 | public Permission getPermission() throws IOException { |
| 99 | return jarFileURLConnection.getPermission(); |
| 100 | } |
| 101 | |
| 102 | class JarURLInputStream extends java.io.FilterInputStream { |
| 103 | JarURLInputStream (InputStream src) { |
| 104 | super (src); |
| 105 | } |
| 106 | public void close () throws IOException { |
| 107 | try { |
| 108 | super.close(); |
| 109 | } finally { |
| 110 | if (!getUseCaches()) { |
| 111 | jarFile.close(); |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | |
| 118 | |
| 119 | public void connect() throws IOException { |
| 120 | if (!connected) { |
| 121 | /* the factory call will do the security checks */ |
| 122 | jarFile = factory.get(getJarFileURL(), getUseCaches()); |
| 123 | |
| 124 | /* we also ask the factory the permission that was required |
| 125 | * to get the jarFile, and set it as our permission. |
| 126 | */ |
| 127 | if (getUseCaches()) { |
| 128 | jarFileURLConnection = factory.getConnection(jarFile); |
| 129 | } |
| 130 | |
| 131 | if ((entryName != null)) { |
| 132 | jarEntry = (JarEntry)jarFile.getEntry(entryName); |
| 133 | if (jarEntry == null) { |
| 134 | try { |
| 135 | if (!getUseCaches()) { |
| 136 | jarFile.close(); |
| 137 | } |
| 138 | } catch (Exception e) { |
| 139 | } |
| 140 | throw new FileNotFoundException("JAR entry " + entryName + |
| 141 | " not found in " + |
| 142 | jarFile.getName()); |
| 143 | } |
| 144 | } |
| 145 | connected = true; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | public InputStream getInputStream() throws IOException { |
| 150 | connect(); |
| 151 | |
| 152 | InputStream result = null; |
| 153 | |
| 154 | if (entryName == null) { |
| 155 | throw new IOException("no entry name specified"); |
| 156 | } else { |
| 157 | if (jarEntry == null) { |
| 158 | throw new FileNotFoundException("JAR entry " + entryName + |
| 159 | " not found in " + |
| 160 | jarFile.getName()); |
| 161 | } |
| 162 | result = new JarURLInputStream (jarFile.getInputStream(jarEntry)); |
| 163 | } |
| 164 | return result; |
| 165 | } |
| 166 | |
| 167 | public int getContentLength() { |
| 168 | long result = getContentLengthLong(); |
| 169 | if (result > Integer.MAX_VALUE) |
| 170 | return -1; |
| 171 | return (int) result; |
| 172 | } |
| 173 | |
| 174 | public long getContentLengthLong() { |
| 175 | long result = -1; |
| 176 | try { |
| 177 | connect(); |
| 178 | if (jarEntry == null) { |
| 179 | /* if the URL referes to an archive */ |
| 180 | result = jarFileURLConnection.getContentLengthLong(); |
| 181 | } else { |
| 182 | /* if the URL referes to an archive entry */ |
| 183 | result = getJarEntry().getSize(); |
| 184 | } |
| 185 | } catch (IOException e) { |
| 186 | } |
| 187 | return result; |
| 188 | } |
| 189 | |
| 190 | public Object getContent() throws IOException { |
| 191 | Object result = null; |
| 192 | |
| 193 | connect(); |
| 194 | if (entryName == null) { |
| 195 | result = jarFile; |
| 196 | } else { |
| 197 | result = super.getContent(); |
| 198 | } |
| 199 | return result; |
| 200 | } |
| 201 | |
| 202 | public String getContentType() { |
| 203 | if (contentType == null) { |
| 204 | if (entryName == null) { |
| 205 | contentType = "x-java/jar"; |
| 206 | } else { |
| 207 | try { |
| 208 | connect(); |
| 209 | InputStream in = jarFile.getInputStream(jarEntry); |
| 210 | contentType = guessContentTypeFromStream( |
| 211 | new BufferedInputStream(in)); |
| 212 | in.close(); |
| 213 | } catch (IOException e) { |
| 214 | // don't do anything |
| 215 | } |
| 216 | } |
| 217 | if (contentType == null) { |
| 218 | contentType = guessContentTypeFromName(entryName); |
| 219 | } |
| 220 | if (contentType == null) { |
| 221 | contentType = "content/unknown"; |
| 222 | } |
| 223 | } |
| 224 | return contentType; |
| 225 | } |
| 226 | |
| 227 | public String getHeaderField(String name) { |
| 228 | return jarFileURLConnection.getHeaderField(name); |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Sets the general request property. |
| 233 | * |
| 234 | * @param key the keyword by which the request is known |
| 235 | * (e.g., "<code>accept</code>"). |
| 236 | * @param value the value associated with it. |
| 237 | */ |
| 238 | public void setRequestProperty(String key, String value) { |
| 239 | jarFileURLConnection.setRequestProperty(key, value); |
| 240 | } |
| 241 | |
| 242 | /** |
| 243 | * Returns the value of the named general request property for this |
| 244 | * connection. |
| 245 | * |
| 246 | * @return the value of the named general request property for this |
| 247 | * connection. |
| 248 | */ |
| 249 | public String getRequestProperty(String key) { |
| 250 | return jarFileURLConnection.getRequestProperty(key); |
| 251 | } |
| 252 | |
| 253 | /** |
| 254 | * Adds a general request property specified by a |
| 255 | * key-value pair. This method will not overwrite |
| 256 | * existing values associated with the same key. |
| 257 | * |
| 258 | * @param key the keyword by which the request is known |
| 259 | * (e.g., "<code>accept</code>"). |
| 260 | * @param value the value associated with it. |
| 261 | */ |
| 262 | public void addRequestProperty(String key, String value) { |
| 263 | jarFileURLConnection.addRequestProperty(key, value); |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Returns an unmodifiable Map of general request |
| 268 | * properties for this connection. The Map keys |
| 269 | * are Strings that represent the request-header |
| 270 | * field names. Each Map value is a unmodifiable List |
| 271 | * of Strings that represents the corresponding |
| 272 | * field values. |
| 273 | * |
| 274 | * @return a Map of the general request properties for this connection. |
| 275 | */ |
| 276 | public Map<String,List<String>> getRequestProperties() { |
| 277 | return jarFileURLConnection.getRequestProperties(); |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Set the value of the <code>allowUserInteraction</code> field of |
| 282 | * this <code>URLConnection</code>. |
| 283 | * |
| 284 | * @param allowuserinteraction the new value. |
| 285 | * @see java.net.URLConnection#allowUserInteraction |
| 286 | */ |
| 287 | public void setAllowUserInteraction(boolean allowuserinteraction) { |
| 288 | jarFileURLConnection.setAllowUserInteraction(allowuserinteraction); |
| 289 | } |
| 290 | |
| 291 | /** |
| 292 | * Returns the value of the <code>allowUserInteraction</code> field for |
| 293 | * this object. |
| 294 | * |
| 295 | * @return the value of the <code>allowUserInteraction</code> field for |
| 296 | * this object. |
| 297 | * @see java.net.URLConnection#allowUserInteraction |
| 298 | */ |
| 299 | public boolean getAllowUserInteraction() { |
| 300 | return jarFileURLConnection.getAllowUserInteraction(); |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * cache control |
| 305 | */ |
| 306 | |
| 307 | /** |
| 308 | * Sets the value of the <code>useCaches</code> field of this |
| 309 | * <code>URLConnection</code> to the specified value. |
| 310 | * <p> |
| 311 | * Some protocols do caching of documents. Occasionally, it is important |
| 312 | * to be able to "tunnel through" and ignore the caches (e.g., the |
| 313 | * "reload" button in a browser). If the UseCaches flag on a connection |
| 314 | * is true, the connection is allowed to use whatever caches it can. |
| 315 | * If false, caches are to be ignored. |
| 316 | * The default value comes from DefaultUseCaches, which defaults to |
| 317 | * true. |
| 318 | * |
| 319 | * @see java.net.URLConnection#useCaches |
| 320 | */ |
| 321 | public void setUseCaches(boolean usecaches) { |
| 322 | jarFileURLConnection.setUseCaches(usecaches); |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * Returns the value of this <code>URLConnection</code>'s |
| 327 | * <code>useCaches</code> field. |
| 328 | * |
| 329 | * @return the value of this <code>URLConnection</code>'s |
| 330 | * <code>useCaches</code> field. |
| 331 | * @see java.net.URLConnection#useCaches |
| 332 | */ |
| 333 | public boolean getUseCaches() { |
| 334 | return jarFileURLConnection.getUseCaches(); |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * Sets the value of the <code>ifModifiedSince</code> field of |
| 339 | * this <code>URLConnection</code> to the specified value. |
| 340 | * |
| 341 | * @param value the new value. |
| 342 | * @see java.net.URLConnection#ifModifiedSince |
| 343 | */ |
| 344 | public void setIfModifiedSince(long ifmodifiedsince) { |
| 345 | jarFileURLConnection.setIfModifiedSince(ifmodifiedsince); |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * Sets the default value of the <code>useCaches</code> field to the |
| 350 | * specified value. |
| 351 | * |
| 352 | * @param defaultusecaches the new value. |
| 353 | * @see java.net.URLConnection#useCaches |
| 354 | */ |
| 355 | public void setDefaultUseCaches(boolean defaultusecaches) { |
| 356 | jarFileURLConnection.setDefaultUseCaches(defaultusecaches); |
| 357 | } |
| 358 | |
| 359 | /** |
| 360 | * Returns the default value of a <code>URLConnection</code>'s |
| 361 | * <code>useCaches</code> flag. |
| 362 | * <p> |
| 363 | * Ths default is "sticky", being a part of the static state of all |
| 364 | * URLConnections. This flag applies to the next, and all following |
| 365 | * URLConnections that are created. |
| 366 | * |
| 367 | * @return the default value of a <code>URLConnection</code>'s |
| 368 | * <code>useCaches</code> flag. |
| 369 | * @see java.net.URLConnection#useCaches |
| 370 | */ |
| 371 | public boolean getDefaultUseCaches() { |
| 372 | return jarFileURLConnection.getDefaultUseCaches(); |
| 373 | } |
| 374 | } |