1 /*
2 * Copyright (c) 1995, 2018, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.net;
27
28 import java.io.File;
29 import java.io.IOException;
30 import java.io.InputStream;
31 import java.net.spi.URLStreamHandlerProvider;
32 import java.nio.file.Path;
33 import java.security.AccessController;
34 import java.security.PrivilegedAction;
35 import java.util.Hashtable;
36 import java.io.InvalidObjectException;
37 import java.io.ObjectStreamException;
38 import java.io.ObjectStreamField;
39 import java.io.ObjectInputStream.GetField;
40 import java.util.Iterator;
41 import java.util.Locale;
42 import java.util.NoSuchElementException;
43 import java.util.ServiceConfigurationError;
44 import java.util.ServiceLoader;
45
46 import jdk.internal.access.JavaNetURLAccess;
47 import jdk.internal.access.SharedSecrets;
48 import sun.security.util.SecurityConstants;
49 import sun.security.action.GetPropertyAction;
50
51 /**
52 * Class {@code URL} represents a Uniform Resource
53 * Locator, a pointer to a "resource" on the World
54 * Wide Web. A resource can be something as simple as a file or a
55 * directory, or it can be a reference to a more complicated object,
56 * such as a query to a database or to a search engine. More
57 * information on the types of URLs and their formats can be found at:
58 * <a href=
59 * "http://web.archive.org/web/20051219043731/http://archive.ncsa.uiuc.edu/SDG/Software/Mosaic/Demo/url-primer.html">
60 * <i>Types of URL</i></a>
61 * <p>
62 * In general, a URL can be broken into several parts. Consider the
63 * following example:
64 * <blockquote><pre>
65 * http://www.example.com/docs/resource1.html
66 * </pre></blockquote>
67 * <p>
68 * The URL above indicates that the protocol to use is
69 * {@code http} (HyperText Transfer Protocol) and that the
70 * information resides on a host machine named
71 * {@code www.example.com}. The information on that host
72 * machine is named {@code /docs/resource1.html}. The exact
73 * meaning of this name on the host machine is both protocol
74 * dependent and host dependent. The information normally resides in
75 * a file, but it could be generated on the fly. This component of
76 * the URL is called the <i>path</i> component.
77 * <p>
78 * A URL can optionally specify a "port", which is the
79 * port number to which the TCP connection is made on the remote host
80 * machine. If the port is not specified, the default port for
81 * the protocol is used instead. For example, the default port for
82 * {@code http} is {@code 80}. An alternative port could be
83 * specified as:
84 * <blockquote><pre>
85 * http://www.example.com:1080/docs/resource1.html
86 * </pre></blockquote>
87 * <p>
88 * The syntax of {@code URL} is defined by <a
89 * href="http://www.ietf.org/rfc/rfc2396.txt"><i>RFC 2396: Uniform
90 * Resource Identifiers (URI): Generic Syntax</i></a>, amended by <a
91 * href="http://www.ietf.org/rfc/rfc2732.txt"><i>RFC 2732: Format for
92 * Literal IPv6 Addresses in URLs</i></a>. The Literal IPv6 address format
93 * also supports scope_ids. The syntax and usage of scope_ids is described
94 * <a href="Inet6Address.html#scoped">here</a>.
95 * <p>
96 * A URL may have appended to it a "fragment", also known
97 * as a "ref" or a "reference". The fragment is indicated by the sharp
98 * sign character "#" followed by more characters. For example,
99 * <blockquote><pre>
100 * http://www.example.com/index.html#chapter1
101 * </pre></blockquote>
102 * <p>
103 * This fragment is not technically part of the URL. Rather, it
104 * indicates that after the specified resource is retrieved, the
105 * application is specifically interested in that part of the
106 * document that has the tag {@code chapter1} attached to it. The
107 * meaning of a tag is resource specific.
108 * <p>
109 * An application can also specify a "relative URL",
110 * which contains only enough information to reach the resource
111 * relative to another URL. Relative URLs are frequently used within
112 * HTML pages. For example, if the contents of the URL:
113 * <blockquote><pre>
114 * http://www.example.com/index.html
115 * </pre></blockquote>
116 * contained within it the relative URL:
117 * <blockquote><pre>
118 * FAQ.html
119 * </pre></blockquote>
120 * it would be a shorthand for:
121 * <blockquote><pre>
122 * http://www.example.com/FAQ.html
123 * </pre></blockquote>
124 * <p>
125 * The relative URL need not specify all the components of a URL. If
126 * the protocol, host name, or port number is missing, the value is
127 * inherited from the fully specified URL. The file component must be
128 * specified. The optional fragment is not inherited.
129 * <p>
130 * The URL class does not itself encode or decode any URL components
131 * according to the escaping mechanism defined in RFC2396. It is the
132 * responsibility of the caller to encode any fields, which need to be
133 * escaped prior to calling URL, and also to decode any escaped fields,
134 * that are returned from URL. Furthermore, because URL has no knowledge
135 * of URL escaping, it does not recognise equivalence between the encoded
136 * or decoded form of the same URL. For example, the two URLs:<br>
137 * <pre> http://foo.com/hello world/ and http://foo.com/hello%20world</pre>
138 * would be considered not equal to each other.
139 * <p>
140 * Note, the {@link java.net.URI} class does perform escaping of its
141 * component fields in certain circumstances. The recommended way
142 * to manage the encoding and decoding of URLs is to use {@link java.net.URI},
143 * and to convert between these two classes using {@link #toURI()} and
144 * {@link URI#toURL()}.
145 * <p>
146 * The {@link URLEncoder} and {@link URLDecoder} classes can also be
147 * used, but only for HTML form encoding, which is not the same
148 * as the encoding scheme defined in RFC2396.
149 *
150 * @apiNote
151 *
152 * Applications working with file paths and file URIs should take great
153 * care to use the appropriate methods to convert between the two.
154 * The {@link Path#of(URI)} factory method and the {@link File#File(URI)}
155 * constructor can be used to create {@link Path} or {@link File}
156 * objects from a file URI. {@link Path#toUri()} and {@link File#toURI()}
157 * can be used to create a {@link URI} from a file path, which can be
158 * converted to URL using {@link URI#toURL()}.
159 * Applications should never try to {@linkplain #URL(String, String, String)
160 * construct} or {@linkplain #URL(String) parse} a {@code URL}
161 * from the direct string representation of a {@code File} or {@code Path}
162 * instance.
163 * <p>
164 * Some components of a URL or URI, such as <i>userinfo</i>, may
165 * be abused to construct misleading URLs or URIs. Applications
166 * that deal with URLs or URIs should take into account
167 * the recommendations advised in <a
168 * href="https://tools.ietf.org/html/rfc3986#section-7">RFC3986,
169 * Section 7, Security Considerations</a>.
170 *
171 * @author James Gosling
172 * @since 1.0
173 */
174 public final class URL implements java.io.Serializable {
175
176 static final String BUILTIN_HANDLERS_PREFIX = "sun.net.www.protocol";
177 static final long serialVersionUID = -7627629688361524110L;
178
179 /**
180 * The property which specifies the package prefix list to be scanned
181 * for protocol handlers. The value of this property (if any) should
182 * be a vertical bar delimited list of package names to search through
183 * for a protocol handler to load. The policy of this class is that
184 * all protocol handlers will be in a class called <protocolname>.Handler,
185 * and each package in the list is examined in turn for a matching
186 * handler. If none are found (or the property is not specified), the
187 * default package prefix, sun.net.www.protocol, is used. The search
188 * proceeds from the first package in the list to the last and stops
189 * when a match is found.
190 */
191 private static final String protocolPathProp = "java.protocol.handler.pkgs";
192
193 /**
194 * The protocol to use (ftp, http, nntp, ... etc.) .
195 * @serial
196 */
197 private String protocol;
198
199 /**
200 * The host name to connect to.
201 * @serial
202 */
203 private String host;
204
205 /**
206 * The protocol port to connect to.
207 * @serial
208 */
209 private int port = -1;
210
211 /**
212 * The specified file name on that host. {@code file} is
213 * defined as {@code path[?query]}
214 * @serial
215 */
216 private String file;
217
218 /**
219 * The query part of this URL.
220 */
221 private transient String query;
222
223 /**
224 * The authority part of this URL.
225 * @serial
226 */
227 private String authority;
228
229 /**
230 * The path part of this URL.
231 */
232 private transient String path;
233
234 /**
235 * The userinfo part of this URL.
236 */
237 private transient String userInfo;
238
239 /**
240 * # reference.
241 * @serial
242 */
243 private String ref;
244
245 /**
246 * The host's IP address, used in equals and hashCode.
247 * Computed on demand. An uninitialized or unknown hostAddress is null.
248 */
249 transient InetAddress hostAddress;
250
251 /**
252 * The URLStreamHandler for this URL.
253 */
254 transient URLStreamHandler handler;
255
256 /* Our hash code.
257 * @serial
258 */
259 private int hashCode = -1;
260
261 private transient UrlDeserializedState tempState;
262
263 /**
264 * Creates a {@code URL} object from the specified
265 * {@code protocol}, {@code host}, {@code port}
266 * number, and {@code file}.<p>
267 *
268 * {@code host} can be expressed as a host name or a literal
269 * IP address. If IPv6 literal address is used, it should be
270 * enclosed in square brackets ({@code '['} and {@code ']'}), as
271 * specified by <a
272 * href="http://www.ietf.org/rfc/rfc2732.txt">RFC 2732</a>;
273 * However, the literal IPv6 address format defined in <a
274 * href="http://www.ietf.org/rfc/rfc2373.txt"><i>RFC 2373: IP
275 * Version 6 Addressing Architecture</i></a> is also accepted.<p>
276 *
277 * Specifying a {@code port} number of {@code -1}
278 * indicates that the URL should use the default port for the
279 * protocol.<p>
280 *
281 * If this is the first URL object being created with the specified
282 * protocol, a <i>stream protocol handler</i> object, an instance of
283 * class {@code URLStreamHandler}, is created for that protocol:
284 * <ol>
285 * <li>If the application has previously set up an instance of
286 * {@code URLStreamHandlerFactory} as the stream handler factory,
287 * then the {@code createURLStreamHandler} method of that instance
288 * is called with the protocol string as an argument to create the
289 * stream protocol handler.
290 * <li>If no {@code URLStreamHandlerFactory} has yet been set up,
291 * or if the factory's {@code createURLStreamHandler} method
292 * returns {@code null}, then the {@linkplain java.util.ServiceLoader
293 * ServiceLoader} mechanism is used to locate {@linkplain
294 * java.net.spi.URLStreamHandlerProvider URLStreamHandlerProvider}
295 * implementations using the system class
296 * loader. The order that providers are located is implementation
297 * specific, and an implementation is free to cache the located
298 * providers. A {@linkplain java.util.ServiceConfigurationError
299 * ServiceConfigurationError}, {@code Error} or {@code RuntimeException}
300 * thrown from the {@code createURLStreamHandler}, if encountered, will
301 * be propagated to the calling thread. The {@code
302 * createURLStreamHandler} method of each provider, if instantiated, is
303 * invoked, with the protocol string, until a provider returns non-null,
304 * or all providers have been exhausted.
305 * <li>If the previous step fails to find a protocol handler, the
306 * constructor reads the value of the system property:
307 * <blockquote>{@systemProperty
308 * java.protocol.handler.pkgs
309 * }</blockquote>
310 * If the value of that system property is not {@code null},
311 * it is interpreted as a list of packages separated by a vertical
312 * slash character '{@code |}'. The constructor tries to load
313 * the class named:
314 * <blockquote>{@code
315 * <package>.<protocol>.Handler
316 * }</blockquote>
317 * where {@code <package>} is replaced by the name of the package
318 * and {@code <protocol>} is replaced by the name of the protocol.
319 * If this class does not exist, or if the class exists but it is not
320 * a subclass of {@code URLStreamHandler}, then the next package
321 * in the list is tried.
322 * <li>If the previous step fails to find a protocol handler, then the
323 * constructor tries to load a built-in protocol handler.
324 * If this class does not exist, or if the class exists but it is not a
325 * subclass of {@code URLStreamHandler}, then a
326 * {@code MalformedURLException} is thrown.
327 * </ol>
328 *
329 * <p>Protocol handlers for the following protocols are guaranteed
330 * to exist on the search path :-
331 * <blockquote><pre>
332 * http, https, file, and jar
333 * </pre></blockquote>
334 * Protocol handlers for additional protocols may also be available.
335 * Some protocol handlers, for example those used for loading platform
336 * classes or classes on the class path, may not be overridden. The details
337 * of such restrictions, and when those restrictions apply (during
338 * initialization of the runtime for example), are implementation specific
339 * and therefore not specified
340 *
341 * <p>No validation of the inputs is performed by this constructor.
342 *
343 * @param protocol the name of the protocol to use.
344 * @param host the name of the host.
345 * @param port the port number on the host.
346 * @param file the file on the host
347 * @exception MalformedURLException if an unknown protocol or the port
348 * is a negative number other than -1
349 * @see java.lang.System#getProperty(java.lang.String)
350 * @see java.net.URL#setURLStreamHandlerFactory(
351 * java.net.URLStreamHandlerFactory)
352 * @see java.net.URLStreamHandler
353 * @see java.net.URLStreamHandlerFactory#createURLStreamHandler(
354 * java.lang.String)
355 */
356 public URL(String protocol, String host, int port, String file)
357 throws MalformedURLException
358 {
359 this(protocol, host, port, file, null);
360 }
361
362 /**
363 * Creates a URL from the specified {@code protocol}
364 * name, {@code host} name, and {@code file} name. The
365 * default port for the specified protocol is used.
366 * <p>
367 * This constructor is equivalent to the four-argument
368 * constructor with the only difference of using the
369 * default port for the specified protocol.
370 *
371 * No validation of the inputs is performed by this constructor.
372 *
373 * @param protocol the name of the protocol to use.
374 * @param host the name of the host.
375 * @param file the file on the host.
376 * @exception MalformedURLException if an unknown protocol is specified.
377 * @see java.net.URL#URL(java.lang.String, java.lang.String,
378 * int, java.lang.String)
379 */
380 public URL(String protocol, String host, String file)
381 throws MalformedURLException {
382 this(protocol, host, -1, file);
383 }
384
385 /**
386 * Creates a {@code URL} object from the specified
387 * {@code protocol}, {@code host}, {@code port}
388 * number, {@code file}, and {@code handler}. Specifying
389 * a {@code port} number of {@code -1} indicates that
390 * the URL should use the default port for the protocol. Specifying
391 * a {@code handler} of {@code null} indicates that the URL
392 * should use a default stream handler for the protocol, as outlined
393 * for:
394 * java.net.URL#URL(java.lang.String, java.lang.String, int,
395 * java.lang.String)
396 *
397 * <p>If the handler is not null and there is a security manager,
398 * the security manager's {@code checkPermission}
399 * method is called with a
400 * {@code NetPermission("specifyStreamHandler")} permission.
401 * This may result in a SecurityException.
402 *
403 * No validation of the inputs is performed by this constructor.
404 *
405 * @param protocol the name of the protocol to use.
406 * @param host the name of the host.
407 * @param port the port number on the host.
408 * @param file the file on the host
409 * @param handler the stream handler for the URL.
410 * @exception MalformedURLException if an unknown protocol or the port
411 is a negative number other than -1
412 * @exception SecurityException
413 * if a security manager exists and its
414 * {@code checkPermission} method doesn't allow
415 * specifying a stream handler explicitly.
416 * @see java.lang.System#getProperty(java.lang.String)
417 * @see java.net.URL#setURLStreamHandlerFactory(
418 * java.net.URLStreamHandlerFactory)
419 * @see java.net.URLStreamHandler
420 * @see java.net.URLStreamHandlerFactory#createURLStreamHandler(
421 * java.lang.String)
422 * @see SecurityManager#checkPermission
423 * @see java.net.NetPermission
424 */
425 public URL(String protocol, String host, int port, String file,
426 URLStreamHandler handler) throws MalformedURLException {
427 if (handler != null) {
428 SecurityManager sm = System.getSecurityManager();
429 if (sm != null) {
430 // check for permission to specify a handler
431 checkSpecifyHandler(sm);
432 }
433 }
434
435 protocol = toLowerCase(protocol);
436 this.protocol = protocol;
437 if (host != null) {
438
439 /**
440 * if host is a literal IPv6 address,
441 * we will make it conform to RFC 2732
442 */
443 if (host.indexOf(':') >= 0 && !host.startsWith("[")) {
444 host = "["+host+"]";
445 }
446 this.host = host;
447
448 if (port < -1) {
449 throw new MalformedURLException("Invalid port number :" +
450 port);
451 }
452 this.port = port;
453 authority = (port == -1) ? host : host + ":" + port;
454 }
455
456 int index = file.indexOf('#');
457 this.ref = index < 0 ? null : file.substring(index + 1);
458 file = index < 0 ? file : file.substring(0, index);
459 int q = file.lastIndexOf('?');
460 if (q != -1) {
461 this.query = file.substring(q + 1);
462 this.path = file.substring(0, q);
463 this.file = path + "?" + query;
464 } else {
465 this.path = file;
466 this.file = path;
467 }
468
469 // Note: we don't do validation of the URL here. Too risky to change
470 // right now, but worth considering for future reference. -br
471 if (handler == null &&
472 (handler = getURLStreamHandler(protocol)) == null) {
473 throw new MalformedURLException("unknown protocol: " + protocol);
474 }
475 this.handler = handler;
476 }
477
478 /**
479 * Creates a {@code URL} object from the {@code String}
480 * representation.
481 * <p>
482 * This constructor is equivalent to a call to the two-argument
483 * constructor with a {@code null} first argument.
484 *
485 * @param spec the {@code String} to parse as a URL.
486 * @exception MalformedURLException if no protocol is specified, or an
487 * unknown protocol is found, or {@code spec} is {@code null},
488 * or the parsed URL fails to comply with the specific syntax
489 * of the associated protocol.
490 * @see java.net.URL#URL(java.net.URL, java.lang.String)
491 */
492 public URL(String spec) throws MalformedURLException {
493 this(null, spec);
494 }
495
496 /**
497 * Creates a URL by parsing the given spec within a specified context.
498 *
499 * The new URL is created from the given context URL and the spec
500 * argument as described in
501 * RFC2396 "Uniform Resource Identifiers : Generic * Syntax" :
502 * <blockquote><pre>
503 * <scheme>://<authority><path>?<query>#<fragment>
504 * </pre></blockquote>
505 * The reference is parsed into the scheme, authority, path, query and
506 * fragment parts. If the path component is empty and the scheme,
507 * authority, and query components are undefined, then the new URL is a
508 * reference to the current document. Otherwise, the fragment and query
509 * parts present in the spec are used in the new URL.
510 * <p>
511 * If the scheme component is defined in the given spec and does not match
512 * the scheme of the context, then the new URL is created as an absolute
513 * URL based on the spec alone. Otherwise the scheme component is inherited
514 * from the context URL.
515 * <p>
516 * If the authority component is present in the spec then the spec is
517 * treated as absolute and the spec authority and path will replace the
518 * context authority and path. If the authority component is absent in the
519 * spec then the authority of the new URL will be inherited from the
520 * context.
521 * <p>
522 * If the spec's path component begins with a slash character
523 * "/" then the
524 * path is treated as absolute and the spec path replaces the context path.
525 * <p>
526 * Otherwise, the path is treated as a relative path and is appended to the
527 * context path, as described in RFC2396. Also, in this case,
528 * the path is canonicalized through the removal of directory
529 * changes made by occurrences of ".." and ".".
530 * <p>
531 * For a more detailed description of URL parsing, refer to RFC2396.
532 *
533 * @param context the context in which to parse the specification.
534 * @param spec the {@code String} to parse as a URL.
535 * @exception MalformedURLException if no protocol is specified, or an
536 * unknown protocol is found, or {@code spec} is {@code null},
537 * or the parsed URL fails to comply with the specific syntax
538 * of the associated protocol.
539 * @see java.net.URL#URL(java.lang.String, java.lang.String,
540 * int, java.lang.String)
541 * @see java.net.URLStreamHandler
542 * @see java.net.URLStreamHandler#parseURL(java.net.URL,
543 * java.lang.String, int, int)
544 */
545 public URL(URL context, String spec) throws MalformedURLException {
546 this(context, spec, null);
547 }
548
549 /**
550 * Creates a URL by parsing the given spec with the specified handler
551 * within a specified context. If the handler is null, the parsing
552 * occurs as with the two argument constructor.
553 *
554 * @param context the context in which to parse the specification.
555 * @param spec the {@code String} to parse as a URL.
556 * @param handler the stream handler for the URL.
557 * @exception MalformedURLException if no protocol is specified, or an
558 * unknown protocol is found, or {@code spec} is {@code null},
559 * or the parsed URL fails to comply with the specific syntax
560 * of the associated protocol.
561 * @exception SecurityException
562 * if a security manager exists and its
563 * {@code checkPermission} method doesn't allow
564 * specifying a stream handler.
565 * @see java.net.URL#URL(java.lang.String, java.lang.String,
566 * int, java.lang.String)
567 * @see java.net.URLStreamHandler
568 * @see java.net.URLStreamHandler#parseURL(java.net.URL,
569 * java.lang.String, int, int)
570 */
571 public URL(URL context, String spec, URLStreamHandler handler)
572 throws MalformedURLException
573 {
574 String original = spec;
575 int i, limit, c;
576 int start = 0;
577 String newProtocol = null;
578 boolean aRef=false;
579 boolean isRelative = false;
580
581 // Check for permission to specify a handler
582 if (handler != null) {
583 SecurityManager sm = System.getSecurityManager();
584 if (sm != null) {
585 checkSpecifyHandler(sm);
586 }
587 }
588
589 try {
590 limit = spec.length();
591 while ((limit > 0) && (spec.charAt(limit - 1) <= ' ')) {
592 limit--; //eliminate trailing whitespace
593 }
594 while ((start < limit) && (spec.charAt(start) <= ' ')) {
595 start++; // eliminate leading whitespace
596 }
597
598 if (spec.regionMatches(true, start, "url:", 0, 4)) {
599 start += 4;
600 }
601 if (start < spec.length() && spec.charAt(start) == '#') {
602 /* we're assuming this is a ref relative to the context URL.
603 * This means protocols cannot start w/ '#', but we must parse
604 * ref URL's like: "hello:there" w/ a ':' in them.
605 */
606 aRef=true;
607 }
608 for (i = start ; !aRef && (i < limit) &&
609 ((c = spec.charAt(i)) != '/') ; i++) {
610 if (c == ':') {
611 String s = toLowerCase(spec.substring(start, i));
612 if (isValidProtocol(s)) {
613 newProtocol = s;
614 start = i + 1;
615 }
616 break;
617 }
618 }
619
620 // Only use our context if the protocols match.
621 protocol = newProtocol;
622 if ((context != null) && ((newProtocol == null) ||
623 newProtocol.equalsIgnoreCase(context.protocol))) {
624 // inherit the protocol handler from the context
625 // if not specified to the constructor
626 if (handler == null) {
627 handler = context.handler;
628 }
629
630 // If the context is a hierarchical URL scheme and the spec
631 // contains a matching scheme then maintain backwards
632 // compatibility and treat it as if the spec didn't contain
633 // the scheme; see 5.2.3 of RFC2396
634 if (context.path != null && context.path.startsWith("/"))
635 newProtocol = null;
636
637 if (newProtocol == null) {
638 protocol = context.protocol;
639 authority = context.authority;
640 userInfo = context.userInfo;
641 host = context.host;
642 port = context.port;
643 file = context.file;
644 path = context.path;
645 isRelative = true;
646 }
647 }
648
649 if (protocol == null) {
650 throw new MalformedURLException("no protocol: "+original);
651 }
652
653 // Get the protocol handler if not specified or the protocol
654 // of the context could not be used
655 if (handler == null &&
656 (handler = getURLStreamHandler(protocol)) == null) {
657 throw new MalformedURLException("unknown protocol: "+protocol);
658 }
659
660 this.handler = handler;
661
662 i = spec.indexOf('#', start);
663 if (i >= 0) {
664 ref = spec.substring(i + 1, limit);
665 limit = i;
666 }
667
668 /*
669 * Handle special case inheritance of query and fragment
670 * implied by RFC2396 section 5.2.2.
671 */
672 if (isRelative && start == limit) {
673 query = context.query;
674 if (ref == null) {
675 ref = context.ref;
676 }
677 }
678
679 handler.parseURL(this, spec, start, limit);
680
681 } catch(MalformedURLException e) {
682 throw e;
683 } catch(Exception e) {
684 MalformedURLException exception = new MalformedURLException(e.getMessage());
685 exception.initCause(e);
686 throw exception;
687 }
688 }
689
690 /**
691 * Creates a URL from a URI, as if by invoking {@code uri.toURL()}.
692 *
693 * @see java.net.URI#toURL()
694 */
695 static URL fromURI(URI uri) throws MalformedURLException {
696 if (!uri.isAbsolute()) {
697 throw new IllegalArgumentException("URI is not absolute");
698 }
699 String protocol = uri.getScheme();
700
701 // In general we need to go via Handler.parseURL, but for the jrt
702 // protocol we enforce that the Handler is not overrideable and can
703 // optimize URI to URL conversion.
704 //
705 // Case-sensitive comparison for performance; malformed protocols will
706 // be handled correctly by the slow path.
707 if (protocol.equals("jrt") && !uri.isOpaque()
708 && uri.getRawFragment() == null) {
709
710 String query = uri.getRawQuery();
711 String path = uri.getRawPath();
712 String file = (query == null) ? path : path + "?" + query;
713
714 // URL represent undefined host as empty string while URI use null
715 String host = uri.getHost();
716 if (host == null) {
717 host = "";
718 }
719
720 int port = uri.getPort();
721
722 return new URL("jrt", host, port, file, null);
723 } else {
724 return new URL((URL)null, uri.toString(), null);
725 }
726 }
727
728 /*
729 * Returns true if specified string is a valid protocol name.
730 */
731 private boolean isValidProtocol(String protocol) {
732 int len = protocol.length();
733 if (len < 1)
734 return false;
735 char c = protocol.charAt(0);
736 if (!Character.isLetter(c))
737 return false;
738 for (int i = 1; i < len; i++) {
739 c = protocol.charAt(i);
740 if (!Character.isLetterOrDigit(c) && c != '.' && c != '+' &&
741 c != '-') {
742 return false;
743 }
744 }
745 return true;
746 }
747
748 /*
749 * Checks for permission to specify a stream handler.
750 */
751 private void checkSpecifyHandler(SecurityManager sm) {
752 sm.checkPermission(SecurityConstants.SPECIFY_HANDLER_PERMISSION);
753 }
754
755 /**
756 * Sets the fields of the URL. This is not a public method so that
757 * only URLStreamHandlers can modify URL fields. URLs are
758 * otherwise constant.
759 *
760 * @param protocol the name of the protocol to use
761 * @param host the name of the host
762 @param port the port number on the host
763 * @param file the file on the host
764 * @param ref the internal reference in the URL
765 */
766 void set(String protocol, String host, int port,
767 String file, String ref) {
768 synchronized (this) {
769 this.protocol = protocol;
770 this.host = host;
771 authority = port == -1 ? host : host + ":" + port;
772 this.port = port;
773 this.file = file;
774 this.ref = ref;
775 /* This is very important. We must recompute this after the
776 * URL has been changed. */
777 hashCode = -1;
778 hostAddress = null;
779 int q = file.lastIndexOf('?');
780 if (q != -1) {
781 query = file.substring(q+1);
782 path = file.substring(0, q);
783 } else
784 path = file;
785 }
786 }
787
788 /**
789 * Sets the specified 8 fields of the URL. This is not a public method so
790 * that only URLStreamHandlers can modify URL fields. URLs are otherwise
791 * constant.
792 *
793 * @param protocol the name of the protocol to use
794 * @param host the name of the host
795 * @param port the port number on the host
796 * @param authority the authority part for the url
797 * @param userInfo the username and password
798 * @param path the file on the host
799 * @param ref the internal reference in the URL
800 * @param query the query part of this URL
801 * @since 1.3
802 */
803 void set(String protocol, String host, int port,
804 String authority, String userInfo, String path,
805 String query, String ref) {
806 synchronized (this) {
807 this.protocol = protocol;
808 this.host = host;
809 this.port = port;
810 this.file = query == null ? path : path + "?" + query;
811 this.userInfo = userInfo;
812 this.path = path;
813 this.ref = ref;
814 /* This is very important. We must recompute this after the
815 * URL has been changed. */
816 hashCode = -1;
817 hostAddress = null;
818 this.query = query;
819 this.authority = authority;
820 }
821 }
822
823 /**
824 * Gets the query part of this {@code URL}.
825 *
826 * @return the query part of this {@code URL},
827 * or <CODE>null</CODE> if one does not exist
828 * @since 1.3
829 */
830 public String getQuery() {
831 return query;
832 }
833
834 /**
835 * Gets the path part of this {@code URL}.
836 *
837 * @return the path part of this {@code URL}, or an
838 * empty string if one does not exist
839 * @since 1.3
840 */
841 public String getPath() {
842 return path;
843 }
844
845 /**
846 * Gets the userInfo part of this {@code URL}.
847 *
848 * @return the userInfo part of this {@code URL}, or
849 * <CODE>null</CODE> if one does not exist
850 * @since 1.3
851 */
852 public String getUserInfo() {
853 return userInfo;
854 }
855
856 /**
857 * Gets the authority part of this {@code URL}.
858 *
859 * @return the authority part of this {@code URL}
860 * @since 1.3
861 */
862 public String getAuthority() {
863 return authority;
864 }
865
866 /**
867 * Gets the port number of this {@code URL}.
868 *
869 * @return the port number, or -1 if the port is not set
870 */
871 public int getPort() {
872 return port;
873 }
874
875 /**
876 * Gets the default port number of the protocol associated
877 * with this {@code URL}. If the URL scheme or the URLStreamHandler
878 * for the URL do not define a default port number,
879 * then -1 is returned.
880 *
881 * @return the port number
882 * @since 1.4
883 */
884 public int getDefaultPort() {
885 return handler.getDefaultPort();
886 }
887
888 /**
889 * Gets the protocol name of this {@code URL}.
890 *
891 * @return the protocol of this {@code URL}.
892 */
893 public String getProtocol() {
894 return protocol;
895 }
896
897 /**
898 * Gets the host name of this {@code URL}, if applicable.
899 * The format of the host conforms to RFC 2732, i.e. for a
900 * literal IPv6 address, this method will return the IPv6 address
901 * enclosed in square brackets ({@code '['} and {@code ']'}).
902 *
903 * @return the host name of this {@code URL}.
904 */
905 public String getHost() {
906 return host;
907 }
908
909 /**
910 * Gets the file name of this {@code URL}.
911 * The returned file portion will be
912 * the same as <CODE>getPath()</CODE>, plus the concatenation of
913 * the value of <CODE>getQuery()</CODE>, if any. If there is
914 * no query portion, this method and <CODE>getPath()</CODE> will
915 * return identical results.
916 *
917 * @return the file name of this {@code URL},
918 * or an empty string if one does not exist
919 */
920 public String getFile() {
921 return file;
922 }
923
924 /**
925 * Gets the anchor (also known as the "reference") of this
926 * {@code URL}.
927 *
928 * @return the anchor (also known as the "reference") of this
929 * {@code URL}, or <CODE>null</CODE> if one does not exist
930 */
931 public String getRef() {
932 return ref;
933 }
934
935 /**
936 * Compares this URL for equality with another object.<p>
937 *
938 * If the given object is not a URL then this method immediately returns
939 * {@code false}.<p>
940 *
941 * Two URL objects are equal if they have the same protocol, reference
942 * equivalent hosts, have the same port number on the host, and the same
943 * file and fragment of the file.<p>
944 *
945 * Two hosts are considered equivalent if both host names can be resolved
946 * into the same IP addresses; else if either host name can't be
947 * resolved, the host names must be equal without regard to case; or both
948 * host names equal to null.<p>
949 *
950 * Since hosts comparison requires name resolution, this operation is a
951 * blocking operation. <p>
952 *
953 * Note: The defined behavior for {@code equals} is known to
954 * be inconsistent with virtual hosting in HTTP.
955 *
956 * @param obj the URL to compare against.
957 * @return {@code true} if the objects are the same;
958 * {@code false} otherwise.
959 */
960 public boolean equals(Object obj) {
961 if (!(obj instanceof URL))
962 return false;
963 URL u2 = (URL)obj;
964
965 return handler.equals(this, u2);
966 }
967
968 /**
969 * Creates an integer suitable for hash table indexing.<p>
970 *
971 * The hash code is based upon all the URL components relevant for URL
972 * comparison. As such, this operation is a blocking operation.
973 *
974 * @return a hash code for this {@code URL}.
975 */
976 public synchronized int hashCode() {
977 if (hashCode != -1)
978 return hashCode;
979
980 hashCode = handler.hashCode(this);
981 return hashCode;
982 }
983
984 /**
985 * Compares two URLs, excluding the fragment component.<p>
986 *
987 * Returns {@code true} if this {@code URL} and the
988 * {@code other} argument are equal without taking the
989 * fragment component into consideration.
990 *
991 * @param other the {@code URL} to compare against.
992 * @return {@code true} if they reference the same remote object;
993 * {@code false} otherwise.
994 */
995 public boolean sameFile(URL other) {
996 return handler.sameFile(this, other);
997 }
998
999 /**
1000 * Constructs a string representation of this {@code URL}. The
1001 * string is created by calling the {@code toExternalForm}
1002 * method of the stream protocol handler for this object.
1003 *
1004 * @return a string representation of this object.
1005 * @see java.net.URL#URL(java.lang.String, java.lang.String, int,
1006 * java.lang.String)
1007 * @see java.net.URLStreamHandler#toExternalForm(java.net.URL)
1008 */
1009 public String toString() {
1010 return toExternalForm();
1011 }
1012
1013 /**
1014 * Constructs a string representation of this {@code URL}. The
1015 * string is created by calling the {@code toExternalForm}
1016 * method of the stream protocol handler for this object.
1017 *
1018 * @return a string representation of this object.
1019 * @see java.net.URL#URL(java.lang.String, java.lang.String,
1020 * int, java.lang.String)
1021 * @see java.net.URLStreamHandler#toExternalForm(java.net.URL)
1022 */
1023 public String toExternalForm() {
1024 return handler.toExternalForm(this);
1025 }
1026
1027 /**
1028 * Returns a {@link java.net.URI} equivalent to this URL.
1029 * This method functions in the same way as {@code new URI (this.toString())}.
1030 * <p>Note, any URL instance that complies with RFC 2396 can be converted
1031 * to a URI. However, some URLs that are not strictly in compliance
1032 * can not be converted to a URI.
1033 *
1034 * @exception URISyntaxException if this URL is not formatted strictly according to
1035 * RFC2396 and cannot be converted to a URI.
1036 *
1037 * @return a URI instance equivalent to this URL.
1038 * @since 1.5
1039 */
1040 public URI toURI() throws URISyntaxException {
1041 return new URI (toString());
1042 }
1043
1044 /**
1045 * Returns a {@link java.net.URLConnection URLConnection} instance that
1046 * represents a connection to the remote object referred to by the
1047 * {@code URL}.
1048 *
1049 * <P>A new instance of {@linkplain java.net.URLConnection URLConnection} is
1050 * created every time when invoking the
1051 * {@linkplain java.net.URLStreamHandler#openConnection(URL)
1052 * URLStreamHandler.openConnection(URL)} method of the protocol handler for
1053 * this URL.</P>
1054 *
1055 * <P>It should be noted that a URLConnection instance does not establish
1056 * the actual network connection on creation. This will happen only when
1057 * calling {@linkplain java.net.URLConnection#connect() URLConnection.connect()}.</P>
1058 *
1059 * <P>If for the URL's protocol (such as HTTP or JAR), there
1060 * exists a public, specialized URLConnection subclass belonging
1061 * to one of the following packages or one of their subpackages:
1062 * java.lang, java.io, java.util, java.net, the connection
1063 * returned will be of that subclass. For example, for HTTP an
1064 * HttpURLConnection will be returned, and for JAR a
1065 * JarURLConnection will be returned.</P>
1066 *
1067 * @return a {@link java.net.URLConnection URLConnection} linking
1068 * to the URL.
1069 * @exception IOException if an I/O exception occurs.
1070 * @see java.net.URL#URL(java.lang.String, java.lang.String,
1071 * int, java.lang.String)
1072 */
1073 public URLConnection openConnection() throws java.io.IOException {
1074 return handler.openConnection(this);
1075 }
1076
1077 /**
1078 * Same as {@link #openConnection()}, except that the connection will be
1079 * made through the specified proxy; Protocol handlers that do not
1080 * support proxying will ignore the proxy parameter and make a
1081 * normal connection.
1082 *
1083 * Invoking this method preempts the system's default
1084 * {@link java.net.ProxySelector ProxySelector} settings.
1085 *
1086 * @param proxy the Proxy through which this connection
1087 * will be made. If direct connection is desired,
1088 * Proxy.NO_PROXY should be specified.
1089 * @return a {@code URLConnection} to the URL.
1090 * @exception IOException if an I/O exception occurs.
1091 * @exception SecurityException if a security manager is present
1092 * and the caller doesn't have permission to connect
1093 * to the proxy.
1094 * @exception IllegalArgumentException will be thrown if proxy is null,
1095 * or proxy has the wrong type
1096 * @exception UnsupportedOperationException if the subclass that
1097 * implements the protocol handler doesn't support
1098 * this method.
1099 * @see java.net.URL#URL(java.lang.String, java.lang.String,
1100 * int, java.lang.String)
1101 * @see java.net.URLConnection
1102 * @see java.net.URLStreamHandler#openConnection(java.net.URL,
1103 * java.net.Proxy)
1104 * @since 1.5
1105 */
1106 public URLConnection openConnection(Proxy proxy)
1107 throws java.io.IOException {
1108 if (proxy == null) {
1109 throw new IllegalArgumentException("proxy can not be null");
1110 }
1111
1112 // Create a copy of Proxy as a security measure
1113 Proxy p = proxy == Proxy.NO_PROXY ? Proxy.NO_PROXY : sun.net.ApplicationProxy.create(proxy);
1114 SecurityManager sm = System.getSecurityManager();
1115 if (p.type() != Proxy.Type.DIRECT && sm != null) {
1116 InetSocketAddress epoint = (InetSocketAddress) p.address();
1117 if (epoint.isUnresolved())
1118 sm.checkConnect(epoint.getHostName(), epoint.getPort());
1119 else
1120 sm.checkConnect(epoint.getAddress().getHostAddress(),
1121 epoint.getPort());
1122 }
1123 return handler.openConnection(this, p);
1124 }
1125
1126 /**
1127 * Opens a connection to this {@code URL} and returns an
1128 * {@code InputStream} for reading from that connection. This
1129 * method is a shorthand for:
1130 * <blockquote><pre>
1131 * openConnection().getInputStream()
1132 * </pre></blockquote>
1133 *
1134 * @return an input stream for reading from the URL connection.
1135 * @exception IOException if an I/O exception occurs.
1136 * @see java.net.URL#openConnection()
1137 * @see java.net.URLConnection#getInputStream()
1138 */
1139 public final InputStream openStream() throws java.io.IOException {
1140 return openConnection().getInputStream();
1141 }
1142
1143 /**
1144 * Gets the contents of this URL. This method is a shorthand for:
1145 * <blockquote><pre>
1146 * openConnection().getContent()
1147 * </pre></blockquote>
1148 *
1149 * @return the contents of this URL.
1150 * @exception IOException if an I/O exception occurs.
1151 * @see java.net.URLConnection#getContent()
1152 */
1153 public final Object getContent() throws java.io.IOException {
1154 return openConnection().getContent();
1155 }
1156
1157 /**
1158 * Gets the contents of this URL. This method is a shorthand for:
1159 * <blockquote><pre>
1160 * openConnection().getContent(classes)
1161 * </pre></blockquote>
1162 *
1163 * @param classes an array of Java types
1164 * @return the content object of this URL that is the first match of
1165 * the types specified in the classes array.
1166 * null if none of the requested types are supported.
1167 * @exception IOException if an I/O exception occurs.
1168 * @see java.net.URLConnection#getContent(Class[])
1169 * @since 1.3
1170 */
1171 public final Object getContent(Class<?>[] classes)
1172 throws java.io.IOException {
1173 return openConnection().getContent(classes);
1174 }
1175
1176 /**
1177 * The URLStreamHandler factory.
1178 */
1179 private static volatile URLStreamHandlerFactory factory;
1180
1181 /**
1182 * Sets an application's {@code URLStreamHandlerFactory}.
1183 * This method can be called at most once in a given Java Virtual
1184 * Machine.
1185 *
1186 *<p> The {@code URLStreamHandlerFactory} instance is used to
1187 *construct a stream protocol handler from a protocol name.
1188 *
1189 * <p> If there is a security manager, this method first calls
1190 * the security manager's {@code checkSetFactory} method
1191 * to ensure the operation is allowed.
1192 * This could result in a SecurityException.
1193 *
1194 * @param fac the desired factory.
1195 * @exception Error if the application has already set a factory.
1196 * @exception SecurityException if a security manager exists and its
1197 * {@code checkSetFactory} method doesn't allow
1198 * the operation.
1199 * @see java.net.URL#URL(java.lang.String, java.lang.String,
1200 * int, java.lang.String)
1201 * @see java.net.URLStreamHandlerFactory
1202 * @see SecurityManager#checkSetFactory
1203 */
1204 public static void setURLStreamHandlerFactory(URLStreamHandlerFactory fac) {
1205 synchronized (streamHandlerLock) {
1206 if (factory != null) {
1207 throw new Error("factory already defined");
1208 }
1209 SecurityManager security = System.getSecurityManager();
1210 if (security != null) {
1211 security.checkSetFactory();
1212 }
1213 handlers.clear();
1214
1215 // safe publication of URLStreamHandlerFactory with volatile write
1216 factory = fac;
1217 }
1218 }
1219
1220 private static final URLStreamHandlerFactory defaultFactory = new DefaultFactory();
1221
1222 private static class DefaultFactory implements URLStreamHandlerFactory {
1223 private static String PREFIX = "sun.net.www.protocol.";
1224
1225 public URLStreamHandler createURLStreamHandler(String protocol) {
1226 // Avoid using reflection during bootstrap
1227 switch (protocol) {
1228 case "file":
1229 return new sun.net.www.protocol.file.Handler();
1230 case "jar":
1231 return new sun.net.www.protocol.jar.Handler();
1232 case "jrt":
1233 return new sun.net.www.protocol.jrt.Handler();
1234 }
1235 String name = PREFIX + protocol + ".Handler";
1236 try {
1237 Object o = Class.forName(name).getDeclaredConstructor().newInstance();
1238 return (URLStreamHandler)o;
1239 } catch (Exception e) {
1240 // For compatibility, all Exceptions are ignored.
1241 // any number of exceptions can get thrown here
1242 }
1243 return null;
1244 }
1245 }
1246
1247 private static URLStreamHandler lookupViaProperty(String protocol) {
1248 String packagePrefixList =
1249 GetPropertyAction.privilegedGetProperty(protocolPathProp);
1250 if (packagePrefixList == null) {
1251 // not set
1252 return null;
1253 }
1254
1255 String[] packagePrefixes = packagePrefixList.split("\\|");
1256 URLStreamHandler handler = null;
1257 for (int i=0; handler == null && i<packagePrefixes.length; i++) {
1258 String packagePrefix = packagePrefixes[i].trim();
1259 try {
1260 String clsName = packagePrefix + "." + protocol + ".Handler";
1261 Class<?> cls = null;
1262 try {
1263 cls = Class.forName(clsName);
1264 } catch (ClassNotFoundException e) {
1265 ClassLoader cl = ClassLoader.getSystemClassLoader();
1266 if (cl != null) {
1267 cls = cl.loadClass(clsName);
1268 }
1269 }
1270 if (cls != null) {
1271 @SuppressWarnings("deprecation")
1272 Object tmp = cls.newInstance();
1273 handler = (URLStreamHandler)tmp;
1274 }
1275 } catch (Exception e) {
1276 // any number of exceptions can get thrown here
1277 }
1278 }
1279 return handler;
1280 }
1281
1282 private static Iterator<URLStreamHandlerProvider> providers() {
1283 return new Iterator<>() {
1284
1285 ClassLoader cl = ClassLoader.getSystemClassLoader();
1286 ServiceLoader<URLStreamHandlerProvider> sl =
1287 ServiceLoader.load(URLStreamHandlerProvider.class, cl);
1288 Iterator<URLStreamHandlerProvider> i = sl.iterator();
1289
1290 URLStreamHandlerProvider next = null;
1291
1292 private boolean getNext() {
1293 while (next == null) {
1294 try {
1295 if (!i.hasNext())
1296 return false;
1297 next = i.next();
1298 } catch (ServiceConfigurationError sce) {
1299 if (sce.getCause() instanceof SecurityException) {
1300 // Ignore security exceptions
1301 continue;
1302 }
1303 throw sce;
1304 }
1305 }
1306 return true;
1307 }
1308
1309 public boolean hasNext() {
1310 return getNext();
1311 }
1312
1313 public URLStreamHandlerProvider next() {
1314 if (!getNext())
1315 throw new NoSuchElementException();
1316 URLStreamHandlerProvider n = next;
1317 next = null;
1318 return n;
1319 }
1320 };
1321 }
1322
1323 // Thread-local gate to prevent recursive provider lookups
1324 private static ThreadLocal<Object> gate = new ThreadLocal<>();
1325
1326 private static URLStreamHandler lookupViaProviders(final String protocol) {
1327 if (gate.get() != null)
1328 throw new Error("Circular loading of URL stream handler providers detected");
1329
1330 gate.set(gate);
1331 try {
1332 return AccessController.doPrivileged(
1333 new PrivilegedAction<>() {
1334 public URLStreamHandler run() {
1335 Iterator<URLStreamHandlerProvider> itr = providers();
1336 while (itr.hasNext()) {
1337 URLStreamHandlerProvider f = itr.next();
1338 URLStreamHandler h = f.createURLStreamHandler(protocol);
1339 if (h != null)
1340 return h;
1341 }
1342 return null;
1343 }
1344 });
1345 } finally {
1346 gate.set(null);
1347 }
1348 }
1349
1350 /**
1351 * Returns the protocol in lower case. Special cases known protocols
1352 * to avoid loading locale classes during startup.
1353 */
1354 static String toLowerCase(String protocol) {
1355 if (protocol.equals("jrt") || protocol.equals("file") || protocol.equals("jar")) {
1356 return protocol;
1357 } else {
1358 return protocol.toLowerCase(Locale.ROOT);
1359 }
1360 }
1361
1362 /**
1363 * Non-overrideable protocols: "jrt" and "file"
1364 *
1365 * Character-based comparison for performance reasons; also ensures
1366 * case-insensitive comparison in a locale-independent fashion.
1367 */
1368 static boolean isOverrideable(String protocol) {
1369 if (protocol.length() == 3) {
1370 if ((Character.toLowerCase(protocol.charAt(0)) == 'j') &&
1371 (Character.toLowerCase(protocol.charAt(1)) == 'r') &&
1372 (Character.toLowerCase(protocol.charAt(2)) == 't')) {
1373 return false;
1374 }
1375 } else if (protocol.length() == 4) {
1376 if ((Character.toLowerCase(protocol.charAt(0)) == 'f') &&
1377 (Character.toLowerCase(protocol.charAt(1)) == 'i') &&
1378 (Character.toLowerCase(protocol.charAt(2)) == 'l') &&
1379 (Character.toLowerCase(protocol.charAt(3)) == 'e')) {
1380 return false;
1381 }
1382 }
1383 return true;
1384 }
1385
1386 /**
1387 * A table of protocol handlers.
1388 */
1389 static Hashtable<String,URLStreamHandler> handlers = new Hashtable<>();
1390 private static final Object streamHandlerLock = new Object();
1391
1392 /**
1393 * Returns the Stream Handler.
1394 * @param protocol the protocol to use
1395 */
1396 static URLStreamHandler getURLStreamHandler(String protocol) {
1397
1398 URLStreamHandler handler = handlers.get(protocol);
1399
1400 if (handler != null) {
1401 return handler;
1402 }
1403
1404 URLStreamHandlerFactory fac;
1405 boolean checkedWithFactory = false;
1406
1407 if (isOverrideable(protocol) && jdk.internal.misc.VM.isBooted()) {
1408 // Use the factory (if any). Volatile read makes
1409 // URLStreamHandlerFactory appear fully initialized to current thread.
1410 fac = factory;
1411 if (fac != null) {
1412 handler = fac.createURLStreamHandler(protocol);
1413 checkedWithFactory = true;
1414 }
1415
1416 if (handler == null && !protocol.equalsIgnoreCase("jar")) {
1417 handler = lookupViaProviders(protocol);
1418 }
1419
1420 if (handler == null) {
1421 handler = lookupViaProperty(protocol);
1422 }
1423 }
1424
1425 if (handler == null) {
1426 // Try the built-in protocol handler
1427 handler = defaultFactory.createURLStreamHandler(protocol);
1428 }
1429
1430 synchronized (streamHandlerLock) {
1431 URLStreamHandler handler2 = null;
1432
1433 // Check again with hashtable just in case another
1434 // thread created a handler since we last checked
1435 handler2 = handlers.get(protocol);
1436
1437 if (handler2 != null) {
1438 return handler2;
1439 }
1440
1441 // Check with factory if another thread set a
1442 // factory since our last check
1443 if (!checkedWithFactory && (fac = factory) != null) {
1444 handler2 = fac.createURLStreamHandler(protocol);
1445 }
1446
1447 if (handler2 != null) {
1448 // The handler from the factory must be given more
1449 // importance. Discard the default handler that
1450 // this thread created.
1451 handler = handler2;
1452 }
1453
1454 // Insert this handler into the hashtable
1455 if (handler != null) {
1456 handlers.put(protocol, handler);
1457 }
1458 }
1459 return handler;
1460 }
1461
1462 /**
1463 * @serialField protocol String
1464 *
1465 * @serialField host String
1466 *
1467 * @serialField port int
1468 *
1469 * @serialField authority String
1470 *
1471 * @serialField file String
1472 *
1473 * @serialField ref String
1474 *
1475 * @serialField hashCode int
1476 *
1477 */
1478 private static final ObjectStreamField[] serialPersistentFields = {
1479 new ObjectStreamField("protocol", String.class),
1480 new ObjectStreamField("host", String.class),
1481 new ObjectStreamField("port", int.class),
1482 new ObjectStreamField("authority", String.class),
1483 new ObjectStreamField("file", String.class),
1484 new ObjectStreamField("ref", String.class),
1485 new ObjectStreamField("hashCode", int.class), };
1486
1487 /**
1488 * WriteObject is called to save the state of the URL to an
1489 * ObjectOutputStream. The handler is not saved since it is
1490 * specific to this system.
1491 *
1492 * @serialData the default write object value. When read back in,
1493 * the reader must ensure that calling getURLStreamHandler with
1494 * the protocol variable returns a valid URLStreamHandler and
1495 * throw an IOException if it does not.
1496 */
1497 private synchronized void writeObject(java.io.ObjectOutputStream s)
1498 throws IOException
1499 {
1500 s.defaultWriteObject(); // write the fields
1501 }
1502
1503 /**
1504 * readObject is called to restore the state of the URL from the
1505 * stream. It reads the components of the URL and finds the local
1506 * stream handler.
1507 */
1508 private synchronized void readObject(java.io.ObjectInputStream s)
1509 throws IOException, ClassNotFoundException {
1510 GetField gf = s.readFields();
1511 String protocol = (String)gf.get("protocol", null);
1512 if (getURLStreamHandler(protocol) == null) {
1513 throw new IOException("unknown protocol: " + protocol);
1514 }
1515 String host = (String)gf.get("host", null);
1516 int port = gf.get("port", -1);
1517 String authority = (String)gf.get("authority", null);
1518 String file = (String)gf.get("file", null);
1519 String ref = (String)gf.get("ref", null);
1520 int hashCode = gf.get("hashCode", -1);
1521 if (authority == null
1522 && ((host != null && !host.isEmpty()) || port != -1)) {
1523 if (host == null)
1524 host = "";
1525 authority = (port == -1) ? host : host + ":" + port;
1526 }
1527 tempState = new UrlDeserializedState(protocol, host, port, authority,
1528 file, ref, hashCode);
1529 }
1530
1531 /**
1532 * Replaces the de-serialized object with an URL object.
1533 *
1534 * @return a newly created object from deserialized data
1535 *
1536 * @throws ObjectStreamException if a new object replacing this
1537 * object could not be created
1538 */
1539
1540 private Object readResolve() throws ObjectStreamException {
1541
1542 URLStreamHandler handler = null;
1543 // already been checked in readObject
1544 handler = getURLStreamHandler(tempState.getProtocol());
1545
1546 URL replacementURL = null;
1547 if (isBuiltinStreamHandler(handler.getClass().getName())) {
1548 replacementURL = fabricateNewURL();
1549 } else {
1550 replacementURL = setDeserializedFields(handler);
1551 }
1552 return replacementURL;
1553 }
1554
1555 private URL setDeserializedFields(URLStreamHandler handler) {
1556 URL replacementURL;
1557 String userInfo = null;
1558 String protocol = tempState.getProtocol();
1559 String host = tempState.getHost();
1560 int port = tempState.getPort();
1561 String authority = tempState.getAuthority();
1562 String file = tempState.getFile();
1563 String ref = tempState.getRef();
1564 int hashCode = tempState.getHashCode();
1565
1566
1567 // Construct authority part
1568 if (authority == null
1569 && ((host != null && !host.isEmpty()) || port != -1)) {
1570 if (host == null)
1571 host = "";
1572 authority = (port == -1) ? host : host + ":" + port;
1573
1574 // Handle hosts with userInfo in them
1575 int at = host.lastIndexOf('@');
1576 if (at != -1) {
1577 userInfo = host.substring(0, at);
1578 host = host.substring(at+1);
1579 }
1580 } else if (authority != null) {
1581 // Construct user info part
1582 int ind = authority.indexOf('@');
1583 if (ind != -1)
1584 userInfo = authority.substring(0, ind);
1585 }
1586
1587 // Construct path and query part
1588 String path = null;
1589 String query = null;
1590 if (file != null) {
1591 // Fix: only do this if hierarchical?
1592 int q = file.lastIndexOf('?');
1593 if (q != -1) {
1594 query = file.substring(q+1);
1595 path = file.substring(0, q);
1596 } else
1597 path = file;
1598 }
1599
1600 // Set the object fields.
1601 this.protocol = protocol;
1602 this.host = host;
1603 this.port = port;
1604 this.file = file;
1605 this.authority = authority;
1606 this.ref = ref;
1607 this.hashCode = hashCode;
1608 this.handler = handler;
1609 this.query = query;
1610 this.path = path;
1611 this.userInfo = userInfo;
1612 replacementURL = this;
1613 return replacementURL;
1614 }
1615
1616 private URL fabricateNewURL()
1617 throws InvalidObjectException {
1618 // create URL string from deserialized object
1619 URL replacementURL = null;
1620 String urlString = tempState.reconstituteUrlString();
1621
1622 try {
1623 replacementURL = new URL(urlString);
1624 } catch (MalformedURLException mEx) {
1625 resetState();
1626 InvalidObjectException invoEx = new InvalidObjectException(
1627 "Malformed URL: " + urlString);
1628 invoEx.initCause(mEx);
1629 throw invoEx;
1630 }
1631 replacementURL.setSerializedHashCode(tempState.getHashCode());
1632 resetState();
1633 return replacementURL;
1634 }
1635
1636 private boolean isBuiltinStreamHandler(String handlerClassName) {
1637 return (handlerClassName.startsWith(BUILTIN_HANDLERS_PREFIX));
1638 }
1639
1640 private void resetState() {
1641 this.protocol = null;
1642 this.host = null;
1643 this.port = -1;
1644 this.file = null;
1645 this.authority = null;
1646 this.ref = null;
1647 this.hashCode = -1;
1648 this.handler = null;
1649 this.query = null;
1650 this.path = null;
1651 this.userInfo = null;
1652 this.tempState = null;
1653 }
1654
1655 private void setSerializedHashCode(int hc) {
1656 this.hashCode = hc;
1657 }
1658
1659 static {
1660 SharedSecrets.setJavaNetURLAccess(
1661 new JavaNetURLAccess() {
1662 @Override
1663 public URLStreamHandler getHandler(URL u) {
1664 return u.handler;
1665 }
1666 }
1667 );
1668 }
1669 }
1670
1671 final class UrlDeserializedState {
1672 private final String protocol;
1673 private final String host;
1674 private final int port;
1675 private final String authority;
1676 private final String file;
1677 private final String ref;
1678 private final int hashCode;
1679
1680 public UrlDeserializedState(String protocol,
1681 String host, int port,
1682 String authority, String file,
1683 String ref, int hashCode) {
1684 this.protocol = protocol;
1685 this.host = host;
1686 this.port = port;
1687 this.authority = authority;
1688 this.file = file;
1689 this.ref = ref;
1690 this.hashCode = hashCode;
1691 }
1692
1693 String getProtocol() {
1694 return protocol;
1695 }
1696
1697 String getHost() {
1698 return host;
1699 }
1700
1701 String getAuthority () {
1702 return authority;
1703 }
1704
1705 int getPort() {
1706 return port;
1707 }
1708
1709 String getFile () {
1710 return file;
1711 }
1712
1713 String getRef () {
1714 return ref;
1715 }
1716
1717 int getHashCode () {
1718 return hashCode;
1719 }
1720
1721 String reconstituteUrlString() {
1722
1723 // pre-compute length of StringBuffer
1724 int len = protocol.length() + 1;
1725 if (authority != null && !authority.isEmpty())
1726 len += 2 + authority.length();
1727 if (file != null) {
1728 len += file.length();
1729 }
1730 if (ref != null)
1731 len += 1 + ref.length();
1732 StringBuilder result = new StringBuilder(len);
1733 result.append(protocol);
1734 result.append(":");
1735 if (authority != null && !authority.isEmpty()) {
1736 result.append("//");
1737 result.append(authority);
1738 }
1739 if (file != null) {
1740 result.append(file);
1741 }
1742 if (ref != null) {
1743 result.append("#");
1744 result.append(ref);
1745 }
1746 return result.toString();
1747 }
1748 }