1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 /*
6 * Copyright 1999-2005 The Apache Software Foundation.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package com.sun.org.apache.xerces.internal.util;
22
23 import java.io.IOException;
24 import java.io.Serializable;
25
26 /**********************************************************************
27 * A class to represent a Uniform Resource Identifier (URI). This class
28 * is designed to handle the parsing of URIs and provide access to
29 * the various components (scheme, host, port, userinfo, path, query
30 * string and fragment) that may constitute a URI.
31 * <p>
32 * Parsing of a URI specification is done according to the URI
33 * syntax described in
34 * <a href="http://www.ietf.org/rfc/rfc2396.txt?number=2396">RFC 2396</a>,
35 * and amended by
36 * <a href="http://www.ietf.org/rfc/rfc2732.txt?number=2732">RFC 2732</a>.
37 * <p>
38 * Every absolute URI consists of a scheme, followed by a colon (':'),
39 * followed by a scheme-specific part. For URIs that follow the
40 * "generic URI" syntax, the scheme-specific part begins with two
41 * slashes ("//") and may be followed by an authority segment (comprised
42 * of user information, host, and port), path segment, query segment
43 * and fragment. Note that RFC 2396 no longer specifies the use of the
44 * parameters segment and excludes the "user:password" syntax as part of
45 * the authority segment. If "user:password" appears in a URI, the entire
46 * user/password string is stored as userinfo.
47 * <p>
48 * For URIs that do not follow the "generic URI" syntax (e.g. mailto),
49 * the entire scheme-specific part is treated as the "path" portion
50 * of the URI.
51 * <p>
52 * Note that, unlike the java.net.URL class, this class does not provide
53 * any built-in network access functionality nor does it provide any
54 * scheme-specific functionality (for example, it does not know a
55 * default port for a specific scheme). Rather, it only knows the
56 * grammar and basic set of operations that can be applied to a URI.
57 *
58 *
59 **********************************************************************/
60 public class URI implements Serializable {
61
62 /*******************************************************************
63 * MalformedURIExceptions are thrown in the process of building a URI
64 * or setting fields on a URI when an operation would result in an
65 * invalid URI specification.
66 *
67 ********************************************************************/
68 public static class MalformedURIException extends IOException {
69
70 /** Serialization version. */
71 static final long serialVersionUID = -6695054834342951930L;
72
73 /******************************************************************
74 * Constructs a <code>MalformedURIException</code> with no specified
75 * detail message.
76 ******************************************************************/
77 public MalformedURIException() {
78 super();
79 }
80
81 /*****************************************************************
82 * Constructs a <code>MalformedURIException</code> with the
83 * specified detail message.
84 *
85 * @param p_msg the detail message.
86 ******************************************************************/
87 public MalformedURIException(String p_msg) {
88 super(p_msg);
89 }
90 }
91
92 /** Serialization version. */
93 static final long serialVersionUID = 1601921774685357214L;
94
95 private static final byte [] fgLookupTable = new byte[128];
96
97 /**
98 * Character Classes
99 */
100
101 /** reserved characters ;/?:@&=+$,[] */
102 //RFC 2732 added '[' and ']' as reserved characters
103 private static final int RESERVED_CHARACTERS = 0x01;
104
105 /** URI punctuation mark characters: -_.!~*'() - these, combined with
106 alphanumerics, constitute the "unreserved" characters */
107 private static final int MARK_CHARACTERS = 0x02;
108
109 /** scheme can be composed of alphanumerics and these characters: +-. */
110 private static final int SCHEME_CHARACTERS = 0x04;
111
112 /** userinfo can be composed of unreserved, escaped and these
113 characters: ;:&=+$, */
114 private static final int USERINFO_CHARACTERS = 0x08;
115
116 /** ASCII letter characters */
117 private static final int ASCII_ALPHA_CHARACTERS = 0x10;
118
119 /** ASCII digit characters */
120 private static final int ASCII_DIGIT_CHARACTERS = 0x20;
121
122 /** ASCII hex characters */
123 private static final int ASCII_HEX_CHARACTERS = 0x40;
124
125 /** Path characters */
126 private static final int PATH_CHARACTERS = 0x80;
127
128 /** Mask for alpha-numeric characters */
129 private static final int MASK_ALPHA_NUMERIC = ASCII_ALPHA_CHARACTERS | ASCII_DIGIT_CHARACTERS;
130
131 /** Mask for unreserved characters */
132 private static final int MASK_UNRESERVED_MASK = MASK_ALPHA_NUMERIC | MARK_CHARACTERS;
133
134 /** Mask for URI allowable characters except for % */
135 private static final int MASK_URI_CHARACTER = MASK_UNRESERVED_MASK | RESERVED_CHARACTERS;
136
137 /** Mask for scheme characters */
138 private static final int MASK_SCHEME_CHARACTER = MASK_ALPHA_NUMERIC | SCHEME_CHARACTERS;
139
140 /** Mask for userinfo characters */
141 private static final int MASK_USERINFO_CHARACTER = MASK_UNRESERVED_MASK | USERINFO_CHARACTERS;
142
143 /** Mask for path characters */
144 private static final int MASK_PATH_CHARACTER = MASK_UNRESERVED_MASK | PATH_CHARACTERS;
145
146 static {
147 // Add ASCII Digits and ASCII Hex Numbers
148 for (int i = '0'; i <= '9'; ++i) {
149 fgLookupTable[i] |= ASCII_DIGIT_CHARACTERS | ASCII_HEX_CHARACTERS;
150 }
151
152 // Add ASCII Letters and ASCII Hex Numbers
153 for (int i = 'A'; i <= 'F'; ++i) {
154 fgLookupTable[i] |= ASCII_ALPHA_CHARACTERS | ASCII_HEX_CHARACTERS;
155 fgLookupTable[i+0x00000020] |= ASCII_ALPHA_CHARACTERS | ASCII_HEX_CHARACTERS;
156 }
157
158 // Add ASCII Letters
159 for (int i = 'G'; i <= 'Z'; ++i) {
160 fgLookupTable[i] |= ASCII_ALPHA_CHARACTERS;
161 fgLookupTable[i+0x00000020] |= ASCII_ALPHA_CHARACTERS;
162 }
163
164 // Add Reserved Characters
165 fgLookupTable[';'] |= RESERVED_CHARACTERS;
166 fgLookupTable['/'] |= RESERVED_CHARACTERS;
167 fgLookupTable['?'] |= RESERVED_CHARACTERS;
168 fgLookupTable[':'] |= RESERVED_CHARACTERS;
169 fgLookupTable['@'] |= RESERVED_CHARACTERS;
170 fgLookupTable['&'] |= RESERVED_CHARACTERS;
171 fgLookupTable['='] |= RESERVED_CHARACTERS;
172 fgLookupTable['+'] |= RESERVED_CHARACTERS;
173 fgLookupTable['$'] |= RESERVED_CHARACTERS;
174 fgLookupTable[','] |= RESERVED_CHARACTERS;
175 fgLookupTable['['] |= RESERVED_CHARACTERS;
176 fgLookupTable[']'] |= RESERVED_CHARACTERS;
177
178 // Add Mark Characters
179 fgLookupTable['-'] |= MARK_CHARACTERS;
180 fgLookupTable['_'] |= MARK_CHARACTERS;
181 fgLookupTable['.'] |= MARK_CHARACTERS;
182 fgLookupTable['!'] |= MARK_CHARACTERS;
183 fgLookupTable['~'] |= MARK_CHARACTERS;
184 fgLookupTable['*'] |= MARK_CHARACTERS;
185 fgLookupTable['\''] |= MARK_CHARACTERS;
186 fgLookupTable['('] |= MARK_CHARACTERS;
187 fgLookupTable[')'] |= MARK_CHARACTERS;
188
189 // Add Scheme Characters
190 fgLookupTable['+'] |= SCHEME_CHARACTERS;
191 fgLookupTable['-'] |= SCHEME_CHARACTERS;
192 fgLookupTable['.'] |= SCHEME_CHARACTERS;
193
194 // Add Userinfo Characters
195 fgLookupTable[';'] |= USERINFO_CHARACTERS;
196 fgLookupTable[':'] |= USERINFO_CHARACTERS;
197 fgLookupTable['&'] |= USERINFO_CHARACTERS;
198 fgLookupTable['='] |= USERINFO_CHARACTERS;
199 fgLookupTable['+'] |= USERINFO_CHARACTERS;
200 fgLookupTable['$'] |= USERINFO_CHARACTERS;
201 fgLookupTable[','] |= USERINFO_CHARACTERS;
202
203 // Add Path Characters
204 fgLookupTable[';'] |= PATH_CHARACTERS;
205 fgLookupTable['/'] |= PATH_CHARACTERS;
206 fgLookupTable[':'] |= PATH_CHARACTERS;
207 fgLookupTable['@'] |= PATH_CHARACTERS;
208 fgLookupTable['&'] |= PATH_CHARACTERS;
209 fgLookupTable['='] |= PATH_CHARACTERS;
210 fgLookupTable['+'] |= PATH_CHARACTERS;
211 fgLookupTable['$'] |= PATH_CHARACTERS;
212 fgLookupTable[','] |= PATH_CHARACTERS;
213 }
214
215 /** Stores the scheme (usually the protocol) for this URI. */
216 private String m_scheme = null;
217
218 /** If specified, stores the userinfo for this URI; otherwise null */
219 private String m_userinfo = null;
220
221 /** If specified, stores the host for this URI; otherwise null */
222 private String m_host = null;
223
224 /** If specified, stores the port for this URI; otherwise -1 */
225 private int m_port = -1;
226
227 /** If specified, stores the registry based authority for this URI; otherwise -1 */
228 private String m_regAuthority = null;
229
230 /** If specified, stores the path for this URI; otherwise null */
231 private String m_path = null;
232
233 /** If specified, stores the query string for this URI; otherwise
234 null. */
235 private String m_queryString = null;
236
237 /** If specified, stores the fragment for this URI; otherwise null */
238 private String m_fragment = null;
239
240 private static boolean DEBUG = false;
241
242 /**
243 * Construct a new and uninitialized URI.
244 */
245 public URI() {
246 }
247
248 /**
249 * Construct a new URI from another URI. All fields for this URI are
250 * set equal to the fields of the URI passed in.
251 *
252 * @param p_other the URI to copy (cannot be null)
253 */
254 public URI(URI p_other) {
255 initialize(p_other);
256 }
257
258 /**
259 * Construct a new URI from a URI specification string. If the
260 * specification follows the "generic URI" syntax, (two slashes
261 * following the first colon), the specification will be parsed
262 * accordingly - setting the scheme, userinfo, host,port, path, query
263 * string and fragment fields as necessary. If the specification does
264 * not follow the "generic URI" syntax, the specification is parsed
265 * into a scheme and scheme-specific part (stored as the path) only.
266 *
267 * @param p_uriSpec the URI specification string (cannot be null or
268 * empty)
269 *
270 * @exception MalformedURIException if p_uriSpec violates any syntax
271 * rules
272 */
273 public URI(String p_uriSpec) throws MalformedURIException {
274 this((URI)null, p_uriSpec);
275 }
276
277 /**
278 * Construct a new URI from a URI specification string. If the
279 * specification follows the "generic URI" syntax, (two slashes
280 * following the first colon), the specification will be parsed
281 * accordingly - setting the scheme, userinfo, host,port, path, query
282 * string and fragment fields as necessary. If the specification does
283 * not follow the "generic URI" syntax, the specification is parsed
284 * into a scheme and scheme-specific part (stored as the path) only.
285 * Construct a relative URI if boolean is assigned to "true"
286 * and p_uriSpec is not valid absolute URI, instead of throwing an exception.
287 *
288 * @param p_uriSpec the URI specification string (cannot be null or
289 * empty)
290 * @param allowNonAbsoluteURI true to permit non-absolute URIs,
291 * false otherwise.
292 *
293 * @exception MalformedURIException if p_uriSpec violates any syntax
294 * rules
295 */
296 public URI(String p_uriSpec, boolean allowNonAbsoluteURI) throws MalformedURIException {
297 this((URI)null, p_uriSpec, allowNonAbsoluteURI);
298 }
299
300 /**
301 * Construct a new URI from a base URI and a URI specification string.
302 * The URI specification string may be a relative URI.
303 *
304 * @param p_base the base URI (cannot be null if p_uriSpec is null or
305 * empty)
306 * @param p_uriSpec the URI specification string (cannot be null or
307 * empty if p_base is null)
308 *
309 * @exception MalformedURIException if p_uriSpec violates any syntax
310 * rules
311 */
312 public URI(URI p_base, String p_uriSpec) throws MalformedURIException {
313 initialize(p_base, p_uriSpec);
314 }
315
316 /**
317 * Construct a new URI from a base URI and a URI specification string.
318 * The URI specification string may be a relative URI.
319 * Construct a relative URI if boolean is assigned to "true"
320 * and p_uriSpec is not valid absolute URI and p_base is null
321 * instead of throwing an exception.
322 *
323 * @param p_base the base URI (cannot be null if p_uriSpec is null or
324 * empty)
325 * @param p_uriSpec the URI specification string (cannot be null or
326 * empty if p_base is null)
327 * @param allowNonAbsoluteURI true to permit non-absolute URIs,
328 * false otherwise.
329 *
330 * @exception MalformedURIException if p_uriSpec violates any syntax
331 * rules
332 */
333 public URI(URI p_base, String p_uriSpec, boolean allowNonAbsoluteURI) throws MalformedURIException {
334 initialize(p_base, p_uriSpec, allowNonAbsoluteURI);
335 }
336
337 /**
338 * Construct a new URI that does not follow the generic URI syntax.
339 * Only the scheme and scheme-specific part (stored as the path) are
340 * initialized.
341 *
342 * @param p_scheme the URI scheme (cannot be null or empty)
343 * @param p_schemeSpecificPart the scheme-specific part (cannot be
344 * null or empty)
345 *
346 * @exception MalformedURIException if p_scheme violates any
347 * syntax rules
348 */
349 public URI(String p_scheme, String p_schemeSpecificPart)
350 throws MalformedURIException {
351 if (p_scheme == null || p_scheme.trim().length() == 0) {
352 throw new MalformedURIException(
353 "Cannot construct URI with null/empty scheme!");
354 }
355 if (p_schemeSpecificPart == null ||
356 p_schemeSpecificPart.trim().length() == 0) {
357 throw new MalformedURIException(
358 "Cannot construct URI with null/empty scheme-specific part!");
359 }
360 setScheme(p_scheme);
361 setPath(p_schemeSpecificPart);
362 }
363
364 /**
365 * Construct a new URI that follows the generic URI syntax from its
366 * component parts. Each component is validated for syntax and some
367 * basic semantic checks are performed as well. See the individual
368 * setter methods for specifics.
369 *
370 * @param p_scheme the URI scheme (cannot be null or empty)
371 * @param p_host the hostname, IPv4 address or IPv6 reference for the URI
372 * @param p_path the URI path - if the path contains '?' or '#',
373 * then the query string and/or fragment will be
374 * set from the path; however, if the query and
375 * fragment are specified both in the path and as
376 * separate parameters, an exception is thrown
377 * @param p_queryString the URI query string (cannot be specified
378 * if path is null)
379 * @param p_fragment the URI fragment (cannot be specified if path
380 * is null)
381 *
382 * @exception MalformedURIException if any of the parameters violates
383 * syntax rules or semantic rules
384 */
385 public URI(String p_scheme, String p_host, String p_path,
386 String p_queryString, String p_fragment)
387 throws MalformedURIException {
388 this(p_scheme, null, p_host, -1, p_path, p_queryString, p_fragment);
389 }
390
391 /**
392 * Construct a new URI that follows the generic URI syntax from its
393 * component parts. Each component is validated for syntax and some
394 * basic semantic checks are performed as well. See the individual
395 * setter methods for specifics.
396 *
397 * @param p_scheme the URI scheme (cannot be null or empty)
398 * @param p_userinfo the URI userinfo (cannot be specified if host
399 * is null)
400 * @param p_host the hostname, IPv4 address or IPv6 reference for the URI
401 * @param p_port the URI port (may be -1 for "unspecified"; cannot
402 * be specified if host is null)
403 * @param p_path the URI path - if the path contains '?' or '#',
404 * then the query string and/or fragment will be
405 * set from the path; however, if the query and
406 * fragment are specified both in the path and as
407 * separate parameters, an exception is thrown
408 * @param p_queryString the URI query string (cannot be specified
409 * if path is null)
410 * @param p_fragment the URI fragment (cannot be specified if path
411 * is null)
412 *
413 * @exception MalformedURIException if any of the parameters violates
414 * syntax rules or semantic rules
415 */
416 public URI(String p_scheme, String p_userinfo,
417 String p_host, int p_port, String p_path,
418 String p_queryString, String p_fragment)
419 throws MalformedURIException {
420 if (p_scheme == null || p_scheme.trim().length() == 0) {
421 throw new MalformedURIException("Scheme is required!");
422 }
423
424 if (p_host == null) {
425 if (p_userinfo != null) {
426 throw new MalformedURIException(
427 "Userinfo may not be specified if host is not specified!");
428 }
429 if (p_port != -1) {
430 throw new MalformedURIException(
431 "Port may not be specified if host is not specified!");
432 }
433 }
434
435 if (p_path != null) {
436 if (p_path.indexOf('?') != -1 && p_queryString != null) {
437 throw new MalformedURIException(
438 "Query string cannot be specified in path and query string!");
439 }
440
441 if (p_path.indexOf('#') != -1 && p_fragment != null) {
442 throw new MalformedURIException(
443 "Fragment cannot be specified in both the path and fragment!");
444 }
445 }
446
447 setScheme(p_scheme);
448 setHost(p_host);
449 setPort(p_port);
450 setUserinfo(p_userinfo);
451 setPath(p_path);
452 setQueryString(p_queryString);
453 setFragment(p_fragment);
454 }
455
456 /**
457 * Initialize all fields of this URI from another URI.
458 *
459 * @param p_other the URI to copy (cannot be null)
460 */
461 private void initialize(URI p_other) {
462 m_scheme = p_other.getScheme();
463 m_userinfo = p_other.getUserinfo();
464 m_host = p_other.getHost();
465 m_port = p_other.getPort();
466 m_regAuthority = p_other.getRegBasedAuthority();
467 m_path = p_other.getPath();
468 m_queryString = p_other.getQueryString();
469 m_fragment = p_other.getFragment();
470 }
471
472 /**
473 * Initializes this URI from a base URI and a URI specification string.
474 * See RFC 2396 Section 4 and Appendix B for specifications on parsing
475 * the URI and Section 5 for specifications on resolving relative URIs
476 * and relative paths.
477 *
478 * @param p_base the base URI (may be null if p_uriSpec is an absolute
479 * URI)
480 * @param p_uriSpec the URI spec string which may be an absolute or
481 * relative URI (can only be null/empty if p_base
482 * is not null)
483 * @param allowNonAbsoluteURI true to permit non-absolute URIs,
484 * in case of relative URI, false otherwise.
485 *
486 * @exception MalformedURIException if p_base is null and p_uriSpec
487 * is not an absolute URI or if
488 * p_uriSpec violates syntax rules
489 */
490 private void initialize(URI p_base, String p_uriSpec, boolean allowNonAbsoluteURI)
491 throws MalformedURIException {
492
493 String uriSpec = p_uriSpec;
494 int uriSpecLen = (uriSpec != null) ? uriSpec.length() : 0;
495
496 if (p_base == null && uriSpecLen == 0) {
497 if (allowNonAbsoluteURI) {
498 m_path = "";
499 return;
500 }
501 throw new MalformedURIException("Cannot initialize URI with empty parameters.");
502 }
503
504 // just make a copy of the base if spec is empty
505 if (uriSpecLen == 0) {
506 initialize(p_base);
507 return;
508 }
509
510 int index = 0;
511
512 // Check for scheme, which must be before '/', '?' or '#'.
513 int colonIdx = uriSpec.indexOf(':');
514 if (colonIdx != -1) {
515 final int searchFrom = colonIdx - 1;
516 // search backwards starting from character before ':'.
517 int slashIdx = uriSpec.lastIndexOf('/', searchFrom);
518 int queryIdx = uriSpec.lastIndexOf('?', searchFrom);
519 int fragmentIdx = uriSpec.lastIndexOf('#', searchFrom);
520
521 if (colonIdx == 0 || slashIdx != -1 ||
522 queryIdx != -1 || fragmentIdx != -1) {
523 // A standalone base is a valid URI according to spec
524 if (colonIdx == 0 || (p_base == null && fragmentIdx != 0 && !allowNonAbsoluteURI)) {
525 throw new MalformedURIException("No scheme found in URI.");
526 }
527 }
528 else {
529 initializeScheme(uriSpec);
530 index = m_scheme.length()+1;
531
532 // Neither 'scheme:' or 'scheme:#fragment' are valid URIs.
533 if (colonIdx == uriSpecLen - 1 || uriSpec.charAt(colonIdx+1) == '#') {
534 throw new MalformedURIException("Scheme specific part cannot be empty.");
535 }
536 }
537 }
538 else if (p_base == null && uriSpec.indexOf('#') != 0 && !allowNonAbsoluteURI) {
539 throw new MalformedURIException("No scheme found in URI.");
540 }
541
542 // Two slashes means we may have authority, but definitely means we're either
543 // matching net_path or abs_path. These two productions are ambiguous in that
544 // every net_path (except those containing an IPv6Reference) is an abs_path.
545 // RFC 2396 resolves this ambiguity by applying a greedy left most matching rule.
546 // Try matching net_path first, and if that fails we don't have authority so
547 // then attempt to match abs_path.
548 //
549 // net_path = "//" authority [ abs_path ]
550 // abs_path = "/" path_segments
551 if (((index+1) < uriSpecLen) &&
552 (uriSpec.charAt(index) == '/' && uriSpec.charAt(index+1) == '/')) {
553 index += 2;
554 int startPos = index;
555
556 // Authority will be everything up to path, query or fragment
557 char testChar = '\0';
558 while (index < uriSpecLen) {
559 testChar = uriSpec.charAt(index);
560 if (testChar == '/' || testChar == '?' || testChar == '#') {
561 break;
562 }
563 index++;
564 }
565
566 // Attempt to parse authority. If the section is an empty string
567 // this is a valid server based authority, so set the host to this
568 // value.
569 if (index > startPos) {
570 // If we didn't find authority we need to back up. Attempt to
571 // match against abs_path next.
572 if (!initializeAuthority(uriSpec.substring(startPos, index))) {
573 index = startPos - 2;
574 }
575 }
576 else {
577 m_host = "";
578 }
579 }
580
581 initializePath(uriSpec, index);
582
583 // Resolve relative URI to base URI - see RFC 2396 Section 5.2
584 // In some cases, it might make more sense to throw an exception
585 // (when scheme is specified is the string spec and the base URI
586 // is also specified, for example), but we're just following the
587 // RFC specifications
588 if (p_base != null) {
589 absolutize(p_base);
590 }
591 }
592
593 /**
594 * Initializes this URI from a base URI and a URI specification string.
595 * See RFC 2396 Section 4 and Appendix B for specifications on parsing
596 * the URI and Section 5 for specifications on resolving relative URIs
597 * and relative paths.
598 *
599 * @param p_base the base URI (may be null if p_uriSpec is an absolute
600 * URI)
601 * @param p_uriSpec the URI spec string which may be an absolute or
602 * relative URI (can only be null/empty if p_base
603 * is not null)
604 *
605 * @exception MalformedURIException if p_base is null and p_uriSpec
606 * is not an absolute URI or if
607 * p_uriSpec violates syntax rules
608 */
609 private void initialize(URI p_base, String p_uriSpec)
610 throws MalformedURIException {
611
612 String uriSpec = p_uriSpec;
613 int uriSpecLen = (uriSpec != null) ? uriSpec.length() : 0;
614
615 if (p_base == null && uriSpecLen == 0) {
616 throw new MalformedURIException(
617 "Cannot initialize URI with empty parameters.");
618 }
619
620 // just make a copy of the base if spec is empty
621 if (uriSpecLen == 0) {
622 initialize(p_base);
623 return;
624 }
625
626 int index = 0;
627
628 // Check for scheme, which must be before '/', '?' or '#'.
629 int colonIdx = uriSpec.indexOf(':');
630 if (colonIdx != -1) {
631 final int searchFrom = colonIdx - 1;
632 // search backwards starting from character before ':'.
633 int slashIdx = uriSpec.lastIndexOf('/', searchFrom);
634 int queryIdx = uriSpec.lastIndexOf('?', searchFrom);
635 int fragmentIdx = uriSpec.lastIndexOf('#', searchFrom);
636
637 if (colonIdx == 0 || slashIdx != -1 ||
638 queryIdx != -1 || fragmentIdx != -1) {
639 // A standalone base is a valid URI according to spec
640 if (colonIdx == 0 || (p_base == null && fragmentIdx != 0)) {
641 throw new MalformedURIException("No scheme found in URI.");
642 }
643 }
644 else {
645 initializeScheme(uriSpec);
646 index = m_scheme.length()+1;
647
648 // Neither 'scheme:' or 'scheme:#fragment' are valid URIs.
649 if (colonIdx == uriSpecLen - 1 || uriSpec.charAt(colonIdx+1) == '#') {
650 throw new MalformedURIException("Scheme specific part cannot be empty.");
651 }
652 }
653 }
654 else if (p_base == null && uriSpec.indexOf('#') != 0) {
655 throw new MalformedURIException("No scheme found in URI.");
656 }
657
658 // Two slashes means we may have authority, but definitely means we're either
659 // matching net_path or abs_path. These two productions are ambiguous in that
660 // every net_path (except those containing an IPv6Reference) is an abs_path.
661 // RFC 2396 resolves this ambiguity by applying a greedy left most matching rule.
662 // Try matching net_path first, and if that fails we don't have authority so
663 // then attempt to match abs_path.
664 //
665 // net_path = "//" authority [ abs_path ]
666 // abs_path = "/" path_segments
667 if (((index+1) < uriSpecLen) &&
668 (uriSpec.charAt(index) == '/' && uriSpec.charAt(index+1) == '/')) {
669 index += 2;
670 int startPos = index;
671
672 // Authority will be everything up to path, query or fragment
673 char testChar = '\0';
674 while (index < uriSpecLen) {
675 testChar = uriSpec.charAt(index);
676 if (testChar == '/' || testChar == '?' || testChar == '#') {
677 break;
678 }
679 index++;
680 }
681
682 // Attempt to parse authority. If the section is an empty string
683 // this is a valid server based authority, so set the host to this
684 // value.
685 if (index > startPos) {
686 // If we didn't find authority we need to back up. Attempt to
687 // match against abs_path next.
688 if (!initializeAuthority(uriSpec.substring(startPos, index))) {
689 index = startPos - 2;
690 }
691 }
692 else {
693 m_host = "";
694 }
695 }
696
697 initializePath(uriSpec, index);
698
699 // Resolve relative URI to base URI - see RFC 2396 Section 5.2
700 // In some cases, it might make more sense to throw an exception
701 // (when scheme is specified is the string spec and the base URI
702 // is also specified, for example), but we're just following the
703 // RFC specifications
704 if (p_base != null) {
705 absolutize(p_base);
706 }
707 }
708
709 /**
710 * Absolutize URI with given base URI.
711 *
712 * @param p_base base URI for absolutization
713 */
714 public void absolutize(URI p_base) {
715
716 // check to see if this is the current doc - RFC 2396 5.2 #2
717 // note that this is slightly different from the RFC spec in that
718 // we don't include the check for query string being null
719 // - this handles cases where the urispec is just a query
720 // string or a fragment (e.g. "?y" or "#s") -
721 // see <http://www.ics.uci.edu/~fielding/url/test1.html> which
722 // identified this as a bug in the RFC
723 if (m_path.length() == 0 && m_scheme == null &&
724 m_host == null && m_regAuthority == null) {
725 m_scheme = p_base.getScheme();
726 m_userinfo = p_base.getUserinfo();
727 m_host = p_base.getHost();
728 m_port = p_base.getPort();
729 m_regAuthority = p_base.getRegBasedAuthority();
730 m_path = p_base.getPath();
731
732 if (m_queryString == null) {
733 m_queryString = p_base.getQueryString();
734
735 if (m_fragment == null) {
736 m_fragment = p_base.getFragment();
737 }
738 }
739 return;
740 }
741
742 // check for scheme - RFC 2396 5.2 #3
743 // if we found a scheme, it means absolute URI, so we're done
744 if (m_scheme == null) {
745 m_scheme = p_base.getScheme();
746 }
747 else {
748 return;
749 }
750
751 // check for authority - RFC 2396 5.2 #4
752 // if we found a host, then we've got a network path, so we're done
753 if (m_host == null && m_regAuthority == null) {
754 m_userinfo = p_base.getUserinfo();
755 m_host = p_base.getHost();
756 m_port = p_base.getPort();
757 m_regAuthority = p_base.getRegBasedAuthority();
758 }
759 else {
760 return;
761 }
762
763 // check for absolute path - RFC 2396 5.2 #5
764 if (m_path.length() > 0 &&
765 m_path.startsWith("/")) {
766 return;
767 }
768
769 // if we get to this point, we need to resolve relative path
770 // RFC 2396 5.2 #6
771 String path = "";
772 String basePath = p_base.getPath();
773
774 // 6a - get all but the last segment of the base URI path
775 if (basePath != null && basePath.length() > 0) {
776 int lastSlash = basePath.lastIndexOf('/');
777 if (lastSlash != -1) {
778 path = basePath.substring(0, lastSlash+1);
779 }
780 }
781 else if (m_path.length() > 0) {
782 path = "/";
783 }
784
785 // 6b - append the relative URI path
786 path = path.concat(m_path);
787
788 // 6c - remove all "./" where "." is a complete path segment
789 int index = -1;
790 while ((index = path.indexOf("/./")) != -1) {
791 path = path.substring(0, index+1).concat(path.substring(index+3));
792 }
793
794 // 6d - remove "." if path ends with "." as a complete path segment
795 if (path.endsWith("/.")) {
796 path = path.substring(0, path.length()-1);
797 }
798
799 // 6e - remove all "<segment>/../" where "<segment>" is a complete
800 // path segment not equal to ".."
801 index = 1;
802 int segIndex = -1;
803 String tempString = null;
804
805 while ((index = path.indexOf("/../", index)) > 0) {
806 tempString = path.substring(0, path.indexOf("/../"));
807 segIndex = tempString.lastIndexOf('/');
808 if (segIndex != -1) {
809 if (!tempString.substring(segIndex).equals("..")) {
810 path = path.substring(0, segIndex+1).concat(path.substring(index+4));
811 index = segIndex;
812 }
813 else {
814 index += 4;
815 }
816 }
817 else {
818 index += 4;
819 }
820 }
821
822 // 6f - remove ending "<segment>/.." where "<segment>" is a
823 // complete path segment
824 if (path.endsWith("/..")) {
825 tempString = path.substring(0, path.length()-3);
826 segIndex = tempString.lastIndexOf('/');
827 if (segIndex != -1) {
828 path = path.substring(0, segIndex+1);
829 }
830 }
831 m_path = path;
832 }
833
834 /**
835 * Initialize the scheme for this URI from a URI string spec.
836 *
837 * @param p_uriSpec the URI specification (cannot be null)
838 *
839 * @exception MalformedURIException if URI does not have a conformant
840 * scheme
841 */
842 private void initializeScheme(String p_uriSpec)
843 throws MalformedURIException {
844 int uriSpecLen = p_uriSpec.length();
845 int index = 0;
846 String scheme = null;
847 char testChar = '\0';
848
849 while (index < uriSpecLen) {
850 testChar = p_uriSpec.charAt(index);
851 if (testChar == ':' || testChar == '/' ||
852 testChar == '?' || testChar == '#') {
853 break;
854 }
855 index++;
856 }
857 scheme = p_uriSpec.substring(0, index);
858
859 if (scheme.length() == 0) {
860 throw new MalformedURIException("No scheme found in URI.");
861 }
862 else {
863 setScheme(scheme);
864 }
865 }
866
867 /**
868 * Initialize the authority (either server or registry based)
869 * for this URI from a URI string spec.
870 *
871 * @param p_uriSpec the URI specification (cannot be null)
872 *
873 * @return true if the given string matched server or registry
874 * based authority
875 */
876 private boolean initializeAuthority(String p_uriSpec) {
877
878 int index = 0;
879 int start = 0;
880 int end = p_uriSpec.length();
881
882 char testChar = '\0';
883 String userinfo = null;
884
885 // userinfo is everything up to @
886 if (p_uriSpec.indexOf('@', start) != -1) {
887 while (index < end) {
888 testChar = p_uriSpec.charAt(index);
889 if (testChar == '@') {
890 break;
891 }
892 index++;
893 }
894 userinfo = p_uriSpec.substring(start, index);
895 index++;
896 }
897
898 // host is everything up to last ':', or up to
899 // and including ']' if followed by ':'.
900 String host = null;
901 start = index;
902 boolean hasPort = false;
903 if (index < end) {
904 if (p_uriSpec.charAt(start) == '[') {
905 int bracketIndex = p_uriSpec.indexOf(']', start);
906 index = (bracketIndex != -1) ? bracketIndex : end;
907 if (index+1 < end && p_uriSpec.charAt(index+1) == ':') {
908 ++index;
909 hasPort = true;
910 }
911 else {
912 index = end;
913 }
914 }
915 else {
916 int colonIndex = p_uriSpec.lastIndexOf(':', end);
917 index = (colonIndex > start) ? colonIndex : end;
918 hasPort = (index != end);
919 }
920 }
921 host = p_uriSpec.substring(start, index);
922 int port = -1;
923 if (host.length() > 0) {
924 // port
925 if (hasPort) {
926 index++;
927 start = index;
928 while (index < end) {
929 index++;
930 }
931 String portStr = p_uriSpec.substring(start, index);
932 if (portStr.length() > 0) {
933 // REVISIT: Remove this code.
934 /** for (int i = 0; i < portStr.length(); i++) {
935 if (!isDigit(portStr.charAt(i))) {
936 throw new MalformedURIException(
937 portStr +
938 " is invalid. Port should only contain digits!");
939 }
940 }**/
941 // REVISIT: Remove this code.
942 // Store port value as string instead of integer.
943 try {
944 port = Integer.parseInt(portStr);
945 if (port == -1) --port;
946 }
947 catch (NumberFormatException nfe) {
948 port = -2;
949 }
950 }
951 }
952 }
953
954 if (isValidServerBasedAuthority(host, port, userinfo)) {
955 m_host = host;
956 m_port = port;
957 m_userinfo = userinfo;
958 return true;
959 }
960 // Note: Registry based authority is being removed from a
961 // new spec for URI which would obsolete RFC 2396. If the
962 // spec is added to XML errata, processing of reg_name
963 // needs to be removed. - mrglavas.
964 else if (isValidRegistryBasedAuthority(p_uriSpec)) {
965 m_regAuthority = p_uriSpec;
966 return true;
967 }
968 return false;
969 }
970
971 /**
972 * Determines whether the components host, port, and user info
973 * are valid as a server authority.
974 *
975 * @param host the host component of authority
976 * @param port the port number component of authority
977 * @param userinfo the user info component of authority
978 *
979 * @return true if the given host, port, and userinfo compose
980 * a valid server authority
981 */
982 private boolean isValidServerBasedAuthority(String host, int port, String userinfo) {
983
984 // Check if the host is well formed.
985 if (!isWellFormedAddress(host)) {
986 return false;
987 }
988
989 // Check that port is well formed if it exists.
990 // REVISIT: There's no restriction on port value ranges, but
991 // perform the same check as in setPort to be consistent. Pass
992 // in a string to this method instead of an integer.
993 if (port < -1 || port > 65535) {
994 return false;
995 }
996
997 // Check that userinfo is well formed if it exists.
998 if (userinfo != null) {
999 // Userinfo can contain alphanumerics, mark characters, escaped
1000 // and ';',':','&','=','+','$',','
1001 int index = 0;
1002 int end = userinfo.length();
1003 char testChar = '\0';
1004 while (index < end) {
1005 testChar = userinfo.charAt(index);
1006 if (testChar == '%') {
1007 if (index+2 >= end ||
1008 !isHex(userinfo.charAt(index+1)) ||
1009 !isHex(userinfo.charAt(index+2))) {
1010 return false;
1011 }
1012 index += 2;
1013 }
1014 else if (!isUserinfoCharacter(testChar)) {
1015 return false;
1016 }
1017 ++index;
1018 }
1019 }
1020 return true;
1021 }
1022
1023 /**
1024 * Determines whether the given string is a registry based authority.
1025 *
1026 * @param authority the authority component of a URI
1027 *
1028 * @return true if the given string is a registry based authority
1029 */
1030 private boolean isValidRegistryBasedAuthority(String authority) {
1031 int index = 0;
1032 int end = authority.length();
1033 char testChar;
1034
1035 while (index < end) {
1036 testChar = authority.charAt(index);
1037
1038 // check for valid escape sequence
1039 if (testChar == '%') {
1040 if (index+2 >= end ||
1041 !isHex(authority.charAt(index+1)) ||
1042 !isHex(authority.charAt(index+2))) {
1043 return false;
1044 }
1045 index += 2;
1046 }
1047 // can check against path characters because the set
1048 // is the same except for '/' which we've already excluded.
1049 else if (!isPathCharacter(testChar)) {
1050 return false;
1051 }
1052 ++index;
1053 }
1054 return true;
1055 }
1056
1057 /**
1058 * Initialize the path for this URI from a URI string spec.
1059 *
1060 * @param p_uriSpec the URI specification (cannot be null)
1061 * @param p_nStartIndex the index to begin scanning from
1062 *
1063 * @exception MalformedURIException if p_uriSpec violates syntax rules
1064 */
1065 private void initializePath(String p_uriSpec, int p_nStartIndex)
1066 throws MalformedURIException {
1067 if (p_uriSpec == null) {
1068 throw new MalformedURIException(
1069 "Cannot initialize path from null string!");
1070 }
1071
1072 int index = p_nStartIndex;
1073 int start = p_nStartIndex;
1074 int end = p_uriSpec.length();
1075 char testChar = '\0';
1076
1077 // path - everything up to query string or fragment
1078 if (start < end) {
1079 // RFC 2732 only allows '[' and ']' to appear in the opaque part.
1080 if (getScheme() == null || p_uriSpec.charAt(start) == '/') {
1081
1082 // Scan path.
1083 // abs_path = "/" path_segments
1084 // rel_path = rel_segment [ abs_path ]
1085 while (index < end) {
1086 testChar = p_uriSpec.charAt(index);
1087
1088 // check for valid escape sequence
1089 if (testChar == '%') {
1090 if (index+2 >= end ||
1091 !isHex(p_uriSpec.charAt(index+1)) ||
1092 !isHex(p_uriSpec.charAt(index+2))) {
1093 throw new MalformedURIException(
1094 "Path contains invalid escape sequence!");
1095 }
1096 index += 2;
1097 }
1098 // Path segments cannot contain '[' or ']' since pchar
1099 // production was not changed by RFC 2732.
1100 else if (!isPathCharacter(testChar)) {
1101 if (testChar == '?' || testChar == '#') {
1102 break;
1103 }
1104 throw new MalformedURIException(
1105 "Path contains invalid character: " + testChar);
1106 }
1107 ++index;
1108 }
1109 }
1110 else {
1111
1112 // Scan opaque part.
1113 // opaque_part = uric_no_slash *uric
1114 while (index < end) {
1115 testChar = p_uriSpec.charAt(index);
1116
1117 if (testChar == '?' || testChar == '#') {
1118 break;
1119 }
1120
1121 // check for valid escape sequence
1122 if (testChar == '%') {
1123 if (index+2 >= end ||
1124 !isHex(p_uriSpec.charAt(index+1)) ||
1125 !isHex(p_uriSpec.charAt(index+2))) {
1126 throw new MalformedURIException(
1127 "Opaque part contains invalid escape sequence!");
1128 }
1129 index += 2;
1130 }
1131 // If the scheme specific part is opaque, it can contain '['
1132 // and ']'. uric_no_slash wasn't modified by RFC 2732, which
1133 // I've interpreted as an error in the spec, since the
1134 // production should be equivalent to (uric - '/'), and uric
1135 // contains '[' and ']'. - mrglavas
1136 else if (!isURICharacter(testChar)) {
1137 throw new MalformedURIException(
1138 "Opaque part contains invalid character: " + testChar);
1139 }
1140 ++index;
1141 }
1142 }
1143 }
1144 m_path = p_uriSpec.substring(start, index);
1145
1146 // query - starts with ? and up to fragment or end
1147 if (testChar == '?') {
1148 index++;
1149 start = index;
1150 while (index < end) {
1151 testChar = p_uriSpec.charAt(index);
1152 if (testChar == '#') {
1153 break;
1154 }
1155 if (testChar == '%') {
1156 if (index+2 >= end ||
1157 !isHex(p_uriSpec.charAt(index+1)) ||
1158 !isHex(p_uriSpec.charAt(index+2))) {
1159 throw new MalformedURIException(
1160 "Query string contains invalid escape sequence!");
1161 }
1162 index += 2;
1163 }
1164 else if (!isURICharacter(testChar)) {
1165 throw new MalformedURIException(
1166 "Query string contains invalid character: " + testChar);
1167 }
1168 index++;
1169 }
1170 m_queryString = p_uriSpec.substring(start, index);
1171 }
1172
1173 // fragment - starts with #
1174 if (testChar == '#') {
1175 index++;
1176 start = index;
1177 while (index < end) {
1178 testChar = p_uriSpec.charAt(index);
1179
1180 if (testChar == '%') {
1181 if (index+2 >= end ||
1182 !isHex(p_uriSpec.charAt(index+1)) ||
1183 !isHex(p_uriSpec.charAt(index+2))) {
1184 throw new MalformedURIException(
1185 "Fragment contains invalid escape sequence!");
1186 }
1187 index += 2;
1188 }
1189 else if (!isURICharacter(testChar)) {
1190 throw new MalformedURIException(
1191 "Fragment contains invalid character: "+testChar);
1192 }
1193 index++;
1194 }
1195 m_fragment = p_uriSpec.substring(start, index);
1196 }
1197 }
1198
1199 /**
1200 * Get the scheme for this URI.
1201 *
1202 * @return the scheme for this URI
1203 */
1204 public String getScheme() {
1205 return m_scheme;
1206 }
1207
1208 /**
1209 * Get the scheme-specific part for this URI (everything following the
1210 * scheme and the first colon). See RFC 2396 Section 5.2 for spec.
1211 *
1212 * @return the scheme-specific part for this URI
1213 */
1214 public String getSchemeSpecificPart() {
1215 StringBuffer schemespec = new StringBuffer();
1216
1217 if (m_host != null || m_regAuthority != null) {
1218 schemespec.append("//");
1219
1220 // Server based authority.
1221 if (m_host != null) {
1222
1223 if (m_userinfo != null) {
1224 schemespec.append(m_userinfo);
1225 schemespec.append('@');
1226 }
1227
1228 schemespec.append(m_host);
1229
1230 if (m_port != -1) {
1231 schemespec.append(':');
1232 schemespec.append(m_port);
1233 }
1234 }
1235 // Registry based authority.
1236 else {
1237 schemespec.append(m_regAuthority);
1238 }
1239 }
1240
1241 if (m_path != null) {
1242 schemespec.append((m_path));
1243 }
1244
1245 if (m_queryString != null) {
1246 schemespec.append('?');
1247 schemespec.append(m_queryString);
1248 }
1249
1250 if (m_fragment != null) {
1251 schemespec.append('#');
1252 schemespec.append(m_fragment);
1253 }
1254
1255 return schemespec.toString();
1256 }
1257
1258 /**
1259 * Get the userinfo for this URI.
1260 *
1261 * @return the userinfo for this URI (null if not specified).
1262 */
1263 public String getUserinfo() {
1264 return m_userinfo;
1265 }
1266
1267 /**
1268 * Get the host for this URI.
1269 *
1270 * @return the host for this URI (null if not specified).
1271 */
1272 public String getHost() {
1273 return m_host;
1274 }
1275
1276 /**
1277 * Get the port for this URI.
1278 *
1279 * @return the port for this URI (-1 if not specified).
1280 */
1281 public int getPort() {
1282 return m_port;
1283 }
1284
1285 /**
1286 * Get the registry based authority for this URI.
1287 *
1288 * @return the registry based authority (null if not specified).
1289 */
1290 public String getRegBasedAuthority() {
1291 return m_regAuthority;
1292 }
1293
1294 /**
1295 * Get the authority for this URI.
1296 *
1297 * @return the authority
1298 */
1299 public String getAuthority() {
1300 StringBuffer authority = new StringBuffer();
1301 if (m_host != null || m_regAuthority != null) {
1302 authority.append("//");
1303
1304 // Server based authority.
1305 if (m_host != null) {
1306
1307 if (m_userinfo != null) {
1308 authority.append(m_userinfo);
1309 authority.append('@');
1310 }
1311
1312 authority.append(m_host);
1313
1314 if (m_port != -1) {
1315 authority.append(':');
1316 authority.append(m_port);
1317 }
1318 }
1319 // Registry based authority.
1320 else {
1321 authority.append(m_regAuthority);
1322 }
1323 }
1324 return authority.toString();
1325 }
1326
1327 /**
1328 * Get the path for this URI (optionally with the query string and
1329 * fragment).
1330 *
1331 * @param p_includeQueryString if true (and query string is not null),
1332 * then a "?" followed by the query string
1333 * will be appended
1334 * @param p_includeFragment if true (and fragment is not null),
1335 * then a "#" followed by the fragment
1336 * will be appended
1337 *
1338 * @return the path for this URI possibly including the query string
1339 * and fragment
1340 */
1341 public String getPath(boolean p_includeQueryString,
1342 boolean p_includeFragment) {
1343 StringBuffer pathString = new StringBuffer(m_path);
1344
1345 if (p_includeQueryString && m_queryString != null) {
1346 pathString.append('?');
1347 pathString.append(m_queryString);
1348 }
1349
1350 if (p_includeFragment && m_fragment != null) {
1351 pathString.append('#');
1352 pathString.append(m_fragment);
1353 }
1354 return pathString.toString();
1355 }
1356
1357 /**
1358 * Get the path for this URI. Note that the value returned is the path
1359 * only and does not include the query string or fragment.
1360 *
1361 * @return the path for this URI.
1362 */
1363 public String getPath() {
1364 return m_path;
1365 }
1366
1367 /**
1368 * Get the query string for this URI.
1369 *
1370 * @return the query string for this URI. Null is returned if there
1371 * was no "?" in the URI spec, empty string if there was a
1372 * "?" but no query string following it.
1373 */
1374 public String getQueryString() {
1375 return m_queryString;
1376 }
1377
1378 /**
1379 * Get the fragment for this URI.
1380 *
1381 * @return the fragment for this URI. Null is returned if there
1382 * was no "#" in the URI spec, empty string if there was a
1383 * "#" but no fragment following it.
1384 */
1385 public String getFragment() {
1386 return m_fragment;
1387 }
1388
1389 /**
1390 * Set the scheme for this URI. The scheme is converted to lowercase
1391 * before it is set.
1392 *
1393 * @param p_scheme the scheme for this URI (cannot be null)
1394 *
1395 * @exception MalformedURIException if p_scheme is not a conformant
1396 * scheme name
1397 */
1398 public void setScheme(String p_scheme) throws MalformedURIException {
1399 if (p_scheme == null) {
1400 throw new MalformedURIException(
1401 "Cannot set scheme from null string!");
1402 }
1403 if (!isConformantSchemeName(p_scheme)) {
1404 throw new MalformedURIException("The scheme is not conformant.");
1405 }
1406
1407 m_scheme = p_scheme.toLowerCase();
1408 }
1409
1410 /**
1411 * Set the userinfo for this URI. If a non-null value is passed in and
1412 * the host value is null, then an exception is thrown.
1413 *
1414 * @param p_userinfo the userinfo for this URI
1415 *
1416 * @exception MalformedURIException if p_userinfo contains invalid
1417 * characters
1418 */
1419 public void setUserinfo(String p_userinfo) throws MalformedURIException {
1420 if (p_userinfo == null) {
1421 m_userinfo = null;
1422 return;
1423 }
1424 else {
1425 if (m_host == null) {
1426 throw new MalformedURIException(
1427 "Userinfo cannot be set when host is null!");
1428 }
1429
1430 // userinfo can contain alphanumerics, mark characters, escaped
1431 // and ';',':','&','=','+','$',','
1432 int index = 0;
1433 int end = p_userinfo.length();
1434 char testChar = '\0';
1435 while (index < end) {
1436 testChar = p_userinfo.charAt(index);
1437 if (testChar == '%') {
1438 if (index+2 >= end ||
1439 !isHex(p_userinfo.charAt(index+1)) ||
1440 !isHex(p_userinfo.charAt(index+2))) {
1441 throw new MalformedURIException(
1442 "Userinfo contains invalid escape sequence!");
1443 }
1444 }
1445 else if (!isUserinfoCharacter(testChar)) {
1446 throw new MalformedURIException(
1447 "Userinfo contains invalid character:"+testChar);
1448 }
1449 index++;
1450 }
1451 }
1452 m_userinfo = p_userinfo;
1453 }
1454
1455 /**
1456 * <p>Set the host for this URI. If null is passed in, the userinfo
1457 * field is also set to null and the port is set to -1.</p>
1458 *
1459 * <p>Note: This method overwrites registry based authority if it
1460 * previously existed in this URI.</p>
1461 *
1462 * @param p_host the host for this URI
1463 *
1464 * @exception MalformedURIException if p_host is not a valid IP
1465 * address or DNS hostname.
1466 */
1467 public void setHost(String p_host) throws MalformedURIException {
1468 if (p_host == null || p_host.length() == 0) {
1469 if (p_host != null) {
1470 m_regAuthority = null;
1471 }
1472 m_host = p_host;
1473 m_userinfo = null;
1474 m_port = -1;
1475 return;
1476 }
1477 else if (!isWellFormedAddress(p_host)) {
1478 throw new MalformedURIException("Host is not a well formed address!");
1479 }
1480 m_host = p_host;
1481 m_regAuthority = null;
1482 }
1483
1484 /**
1485 * Set the port for this URI. -1 is used to indicate that the port is
1486 * not specified, otherwise valid port numbers are between 0 and 65535.
1487 * If a valid port number is passed in and the host field is null,
1488 * an exception is thrown.
1489 *
1490 * @param p_port the port number for this URI
1491 *
1492 * @exception MalformedURIException if p_port is not -1 and not a
1493 * valid port number
1494 */
1495 public void setPort(int p_port) throws MalformedURIException {
1496 if (p_port >= 0 && p_port <= 65535) {
1497 if (m_host == null) {
1498 throw new MalformedURIException(
1499 "Port cannot be set when host is null!");
1500 }
1501 }
1502 else if (p_port != -1) {
1503 throw new MalformedURIException("Invalid port number!");
1504 }
1505 m_port = p_port;
1506 }
1507
1508 /**
1509 * <p>Sets the registry based authority for this URI.</p>
1510 *
1511 * <p>Note: This method overwrites server based authority
1512 * if it previously existed in this URI.</p>
1513 *
1514 * @param authority the registry based authority for this URI
1515 *
1516 * @exception MalformedURIException it authority is not a
1517 * well formed registry based authority
1518 */
1519 public void setRegBasedAuthority(String authority)
1520 throws MalformedURIException {
1521
1522 if (authority == null) {
1523 m_regAuthority = null;
1524 return;
1525 }
1526 // reg_name = 1*( unreserved | escaped | "$" | "," |
1527 // ";" | ":" | "@" | "&" | "=" | "+" )
1528 else if (authority.length() < 1 ||
1529 !isValidRegistryBasedAuthority(authority) ||
1530 authority.indexOf('/') != -1) {
1531 throw new MalformedURIException("Registry based authority is not well formed.");
1532 }
1533 m_regAuthority = authority;
1534 m_host = null;
1535 m_userinfo = null;
1536 m_port = -1;
1537 }
1538
1539 /**
1540 * Set the path for this URI. If the supplied path is null, then the
1541 * query string and fragment are set to null as well. If the supplied
1542 * path includes a query string and/or fragment, these fields will be
1543 * parsed and set as well. Note that, for URIs following the "generic
1544 * URI" syntax, the path specified should start with a slash.
1545 * For URIs that do not follow the generic URI syntax, this method
1546 * sets the scheme-specific part.
1547 *
1548 * @param p_path the path for this URI (may be null)
1549 *
1550 * @exception MalformedURIException if p_path contains invalid
1551 * characters
1552 */
1553 public void setPath(String p_path) throws MalformedURIException {
1554 if (p_path == null) {
1555 m_path = null;
1556 m_queryString = null;
1557 m_fragment = null;
1558 }
1559 else {
1560 initializePath(p_path, 0);
1561 }
1562 }
1563
1564 /**
1565 * Append to the end of the path of this URI. If the current path does
1566 * not end in a slash and the path to be appended does not begin with
1567 * a slash, a slash will be appended to the current path before the
1568 * new segment is added. Also, if the current path ends in a slash
1569 * and the new segment begins with a slash, the extra slash will be
1570 * removed before the new segment is appended.
1571 *
1572 * @param p_addToPath the new segment to be added to the current path
1573 *
1574 * @exception MalformedURIException if p_addToPath contains syntax
1575 * errors
1576 */
1577 public void appendPath(String p_addToPath)
1578 throws MalformedURIException {
1579 if (p_addToPath == null || p_addToPath.trim().length() == 0) {
1580 return;
1581 }
1582
1583 if (!isURIString(p_addToPath)) {
1584 throw new MalformedURIException(
1585 "Path contains invalid character!");
1586 }
1587
1588 if (m_path == null || m_path.trim().length() == 0) {
1589 if (p_addToPath.startsWith("/")) {
1590 m_path = p_addToPath;
1591 }
1592 else {
1593 m_path = "/" + p_addToPath;
1594 }
1595 }
1596 else if (m_path.endsWith("/")) {
1597 if (p_addToPath.startsWith("/")) {
1598 m_path = m_path.concat(p_addToPath.substring(1));
1599 }
1600 else {
1601 m_path = m_path.concat(p_addToPath);
1602 }
1603 }
1604 else {
1605 if (p_addToPath.startsWith("/")) {
1606 m_path = m_path.concat(p_addToPath);
1607 }
1608 else {
1609 m_path = m_path.concat("/" + p_addToPath);
1610 }
1611 }
1612 }
1613
1614 /**
1615 * Set the query string for this URI. A non-null value is valid only
1616 * if this is an URI conforming to the generic URI syntax and
1617 * the path value is not null.
1618 *
1619 * @param p_queryString the query string for this URI
1620 *
1621 * @exception MalformedURIException if p_queryString is not null and this
1622 * URI does not conform to the generic
1623 * URI syntax or if the path is null
1624 */
1625 public void setQueryString(String p_queryString) throws MalformedURIException {
1626 if (p_queryString == null) {
1627 m_queryString = null;
1628 }
1629 else if (!isGenericURI()) {
1630 throw new MalformedURIException(
1631 "Query string can only be set for a generic URI!");
1632 }
1633 else if (getPath() == null) {
1634 throw new MalformedURIException(
1635 "Query string cannot be set when path is null!");
1636 }
1637 else if (!isURIString(p_queryString)) {
1638 throw new MalformedURIException(
1639 "Query string contains invalid character!");
1640 }
1641 else {
1642 m_queryString = p_queryString;
1643 }
1644 }
1645
1646 /**
1647 * Set the fragment for this URI. A non-null value is valid only
1648 * if this is a URI conforming to the generic URI syntax and
1649 * the path value is not null.
1650 *
1651 * @param p_fragment the fragment for this URI
1652 *
1653 * @exception MalformedURIException if p_fragment is not null and this
1654 * URI does not conform to the generic
1655 * URI syntax or if the path is null
1656 */
1657 public void setFragment(String p_fragment) throws MalformedURIException {
1658 if (p_fragment == null) {
1659 m_fragment = null;
1660 }
1661 else if (!isGenericURI()) {
1662 throw new MalformedURIException(
1663 "Fragment can only be set for a generic URI!");
1664 }
1665 else if (getPath() == null) {
1666 throw new MalformedURIException(
1667 "Fragment cannot be set when path is null!");
1668 }
1669 else if (!isURIString(p_fragment)) {
1670 throw new MalformedURIException(
1671 "Fragment contains invalid character!");
1672 }
1673 else {
1674 m_fragment = p_fragment;
1675 }
1676 }
1677
1678 /**
1679 * Determines if the passed-in Object is equivalent to this URI.
1680 *
1681 * @param p_test the Object to test for equality.
1682 *
1683 * @return true if p_test is a URI with all values equal to this
1684 * URI, false otherwise
1685 */
1686 public boolean equals(Object p_test) {
1687 if (p_test instanceof URI) {
1688 URI testURI = (URI) p_test;
1689 if (((m_scheme == null && testURI.m_scheme == null) ||
1690 (m_scheme != null && testURI.m_scheme != null &&
1691 m_scheme.equals(testURI.m_scheme))) &&
1692 ((m_userinfo == null && testURI.m_userinfo == null) ||
1693 (m_userinfo != null && testURI.m_userinfo != null &&
1694 m_userinfo.equals(testURI.m_userinfo))) &&
1695 ((m_host == null && testURI.m_host == null) ||
1696 (m_host != null && testURI.m_host != null &&
1697 m_host.equals(testURI.m_host))) &&
1698 m_port == testURI.m_port &&
1699 ((m_path == null && testURI.m_path == null) ||
1700 (m_path != null && testURI.m_path != null &&
1701 m_path.equals(testURI.m_path))) &&
1702 ((m_queryString == null && testURI.m_queryString == null) ||
1703 (m_queryString != null && testURI.m_queryString != null &&
1704 m_queryString.equals(testURI.m_queryString))) &&
1705 ((m_fragment == null && testURI.m_fragment == null) ||
1706 (m_fragment != null && testURI.m_fragment != null &&
1707 m_fragment.equals(testURI.m_fragment)))) {
1708 return true;
1709 }
1710 }
1711 return false;
1712 }
1713
1714 /**
1715 * Get the URI as a string specification. See RFC 2396 Section 5.2.
1716 *
1717 * @return the URI string specification
1718 */
1719 public String toString() {
1720 StringBuffer uriSpecString = new StringBuffer();
1721
1722 if (m_scheme != null) {
1723 uriSpecString.append(m_scheme);
1724 uriSpecString.append(':');
1725 }
1726 uriSpecString.append(getSchemeSpecificPart());
1727 return uriSpecString.toString();
1728 }
1729
1730 /**
1731 * Get the indicator as to whether this URI uses the "generic URI"
1732 * syntax.
1733 *
1734 * @return true if this URI uses the "generic URI" syntax, false
1735 * otherwise
1736 */
1737 public boolean isGenericURI() {
1738 // presence of the host (whether valid or empty) means
1739 // double-slashes which means generic uri
1740 return (m_host != null);
1741 }
1742
1743 /**
1744 * Returns whether this URI represents an absolute URI.
1745 *
1746 * @return true if this URI represents an absolute URI, false
1747 * otherwise
1748 */
1749 public boolean isAbsoluteURI() {
1750 // presence of the scheme means absolute uri
1751 return (m_scheme != null);
1752 }
1753
1754 /**
1755 * Determine whether a scheme conforms to the rules for a scheme name.
1756 * A scheme is conformant if it starts with an alphanumeric, and
1757 * contains only alphanumerics, '+','-' and '.'.
1758 *
1759 * @return true if the scheme is conformant, false otherwise
1760 */
1761 public static boolean isConformantSchemeName(String p_scheme) {
1762 if (p_scheme == null || p_scheme.trim().length() == 0) {
1763 return false;
1764 }
1765
1766 if (!isAlpha(p_scheme.charAt(0))) {
1767 return false;
1768 }
1769
1770 char testChar;
1771 int schemeLength = p_scheme.length();
1772 for (int i = 1; i < schemeLength; ++i) {
1773 testChar = p_scheme.charAt(i);
1774 if (!isSchemeCharacter(testChar)) {
1775 return false;
1776 }
1777 }
1778
1779 return true;
1780 }
1781
1782 /**
1783 * Determine whether a string is syntactically capable of representing
1784 * a valid IPv4 address, IPv6 reference or the domain name of a network host.
1785 * A valid IPv4 address consists of four decimal digit groups separated by a
1786 * '.'. Each group must consist of one to three digits. See RFC 2732 Section 3,
1787 * and RFC 2373 Section 2.2, for the definition of IPv6 references. A hostname
1788 * consists of domain labels (each of which must begin and end with an alphanumeric
1789 * but may contain '-') separated & by a '.'. See RFC 2396 Section 3.2.2.
1790 *
1791 * @return true if the string is a syntactically valid IPv4 address,
1792 * IPv6 reference or hostname
1793 */
1794 public static boolean isWellFormedAddress(String address) {
1795 if (address == null) {
1796 return false;
1797 }
1798
1799 int addrLength = address.length();
1800 if (addrLength == 0) {
1801 return false;
1802 }
1803
1804 // Check if the host is a valid IPv6reference.
1805 if (address.startsWith("[")) {
1806 return isWellFormedIPv6Reference(address);
1807 }
1808
1809 // Cannot start with a '.', '-', or end with a '-'.
1810 if (address.startsWith(".") ||
1811 address.startsWith("-") ||
1812 address.endsWith("-")) {
1813 return false;
1814 }
1815
1816 // rightmost domain label starting with digit indicates IP address
1817 // since top level domain label can only start with an alpha
1818 // see RFC 2396 Section 3.2.2
1819 int index = address.lastIndexOf('.');
1820 if (address.endsWith(".")) {
1821 index = address.substring(0, index).lastIndexOf('.');
1822 }
1823
1824 if (index+1 < addrLength && isDigit(address.charAt(index+1))) {
1825 return isWellFormedIPv4Address(address);
1826 }
1827 else {
1828 // hostname = *( domainlabel "." ) toplabel [ "." ]
1829 // domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
1830 // toplabel = alpha | alpha *( alphanum | "-" ) alphanum
1831
1832 // RFC 2396 states that hostnames take the form described in
1833 // RFC 1034 (Section 3) and RFC 1123 (Section 2.1). According
1834 // to RFC 1034, hostnames are limited to 255 characters.
1835 if (addrLength > 255) {
1836 return false;
1837 }
1838
1839 // domain labels can contain alphanumerics and '-"
1840 // but must start and end with an alphanumeric
1841 char testChar;
1842 int labelCharCount = 0;
1843
1844 for (int i = 0; i < addrLength; i++) {
1845 testChar = address.charAt(i);
1846 if (testChar == '.') {
1847 if (!isAlphanum(address.charAt(i-1))) {
1848 return false;
1849 }
1850 if (i+1 < addrLength && !isAlphanum(address.charAt(i+1))) {
1851 return false;
1852 }
1853 labelCharCount = 0;
1854 }
1855 else if (!isAlphanum(testChar) && testChar != '-') {
1856 return false;
1857 }
1858 // RFC 1034: Labels must be 63 characters or less.
1859 else if (++labelCharCount > 63) {
1860 return false;
1861 }
1862 }
1863 }
1864 return true;
1865 }
1866
1867 /**
1868 * <p>Determines whether a string is an IPv4 address as defined by
1869 * RFC 2373, and under the further constraint that it must be a 32-bit
1870 * address. Though not expressed in the grammar, in order to satisfy
1871 * the 32-bit address constraint, each segment of the address cannot
1872 * be greater than 255 (8 bits of information).</p>
1873 *
1874 * <p><code>IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT</code></p>
1875 *
1876 * @return true if the string is a syntactically valid IPv4 address
1877 */
1878 public static boolean isWellFormedIPv4Address(String address) {
1879
1880 int addrLength = address.length();
1881 char testChar;
1882 int numDots = 0;
1883 int numDigits = 0;
1884
1885 // make sure that 1) we see only digits and dot separators, 2) that
1886 // any dot separator is preceded and followed by a digit and
1887 // 3) that we find 3 dots
1888 //
1889 // RFC 2732 amended RFC 2396 by replacing the definition
1890 // of IPv4address with the one defined by RFC 2373. - mrglavas
1891 //
1892 // IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
1893 //
1894 // One to three digits must be in each segment.
1895 for (int i = 0; i < addrLength; i++) {
1896 testChar = address.charAt(i);
1897 if (testChar == '.') {
1898 if ((i > 0 && !isDigit(address.charAt(i-1))) ||
1899 (i+1 < addrLength && !isDigit(address.charAt(i+1)))) {
1900 return false;
1901 }
1902 numDigits = 0;
1903 if (++numDots > 3) {
1904 return false;
1905 }
1906 }
1907 else if (!isDigit(testChar)) {
1908 return false;
1909 }
1910 // Check that that there are no more than three digits
1911 // in this segment.
1912 else if (++numDigits > 3) {
1913 return false;
1914 }
1915 // Check that this segment is not greater than 255.
1916 else if (numDigits == 3) {
1917 char first = address.charAt(i-2);
1918 char second = address.charAt(i-1);
1919 if (!(first < '2' ||
1920 (first == '2' &&
1921 (second < '5' ||
1922 (second == '5' && testChar <= '5'))))) {
1923 return false;
1924 }
1925 }
1926 }
1927 return (numDots == 3);
1928 }
1929
1930 /**
1931 * <p>Determines whether a string is an IPv6 reference as defined
1932 * by RFC 2732, where IPv6address is defined in RFC 2373. The
1933 * IPv6 address is parsed according to Section 2.2 of RFC 2373,
1934 * with the additional constraint that the address be composed of
1935 * 128 bits of information.</p>
1936 *
1937 * <p><code>IPv6reference = "[" IPv6address "]"</code></p>
1938 *
1939 * <p>Note: The BNF expressed in RFC 2373 Appendix B does not
1940 * accurately describe section 2.2, and was in fact removed from
1941 * RFC 3513, the successor of RFC 2373.</p>
1942 *
1943 * @return true if the string is a syntactically valid IPv6 reference
1944 */
1945 public static boolean isWellFormedIPv6Reference(String address) {
1946
1947 int addrLength = address.length();
1948 int index = 1;
1949 int end = addrLength-1;
1950
1951 // Check if string is a potential match for IPv6reference.
1952 if (!(addrLength > 2 && address.charAt(0) == '['
1953 && address.charAt(end) == ']')) {
1954 return false;
1955 }
1956
1957 // Counter for the number of 16-bit sections read in the address.
1958 int [] counter = new int[1];
1959
1960 // Scan hex sequence before possible '::' or IPv4 address.
1961 index = scanHexSequence(address, index, end, counter);
1962 if (index == -1) {
1963 return false;
1964 }
1965 // Address must contain 128-bits of information.
1966 else if (index == end) {
1967 return (counter[0] == 8);
1968 }
1969
1970 if (index+1 < end && address.charAt(index) == ':') {
1971 if (address.charAt(index+1) == ':') {
1972 // '::' represents at least one 16-bit group of zeros.
1973 if (++counter[0] > 8) {
1974 return false;
1975 }
1976 index += 2;
1977 // Trailing zeros will fill out the rest of the address.
1978 if (index == end) {
1979 return true;
1980 }
1981 }
1982 // If the second character wasn't ':', in order to be valid,
1983 // the remainder of the string must match IPv4Address,
1984 // and we must have read exactly 6 16-bit groups.
1985 else {
1986 return (counter[0] == 6) &&
1987 isWellFormedIPv4Address(address.substring(index+1, end));
1988 }
1989 }
1990 else {
1991 return false;
1992 }
1993
1994 // 3. Scan hex sequence after '::'.
1995 int prevCount = counter[0];
1996 index = scanHexSequence(address, index, end, counter);
1997
1998 // We've either reached the end of the string, the address ends in
1999 // an IPv4 address, or it is invalid. scanHexSequence has already
2000 // made sure that we have the right number of bits.
2001 return (index == end) ||
2002 (index != -1 && isWellFormedIPv4Address(
2003 address.substring((counter[0] > prevCount) ? index+1 : index, end)));
2004 }
2005
2006 /**
2007 * Helper method for isWellFormedIPv6Reference which scans the
2008 * hex sequences of an IPv6 address. It returns the index of the
2009 * next character to scan in the address, or -1 if the string
2010 * cannot match a valid IPv6 address.
2011 *
2012 * @param address the string to be scanned
2013 * @param index the beginning index (inclusive)
2014 * @param end the ending index (exclusive)
2015 * @param counter a counter for the number of 16-bit sections read
2016 * in the address
2017 *
2018 * @return the index of the next character to scan, or -1 if the
2019 * string cannot match a valid IPv6 address
2020 */
2021 private static int scanHexSequence (String address, int index, int end, int [] counter) {
2022
2023 char testChar;
2024 int numDigits = 0;
2025 int start = index;
2026
2027 // Trying to match the following productions:
2028 // hexseq = hex4 *( ":" hex4)
2029 // hex4 = 1*4HEXDIG
2030 for (; index < end; ++index) {
2031 testChar = address.charAt(index);
2032 if (testChar == ':') {
2033 // IPv6 addresses are 128-bit, so there can be at most eight sections.
2034 if (numDigits > 0 && ++counter[0] > 8) {
2035 return -1;
2036 }
2037 // This could be '::'.
2038 if (numDigits == 0 || ((index+1 < end) && address.charAt(index+1) == ':')) {
2039 return index;
2040 }
2041 numDigits = 0;
2042 }
2043 // This might be invalid or an IPv4address. If it's potentially an IPv4address,
2044 // backup to just after the last valid character that matches hexseq.
2045 else if (!isHex(testChar)) {
2046 if (testChar == '.' && numDigits < 4 && numDigits > 0 && counter[0] <= 6) {
2047 int back = index - numDigits - 1;
2048 return (back >= start) ? back : (back+1);
2049 }
2050 return -1;
2051 }
2052 // There can be at most 4 hex digits per group.
2053 else if (++numDigits > 4) {
2054 return -1;
2055 }
2056 }
2057 return (numDigits > 0 && ++counter[0] <= 8) ? end : -1;
2058 }
2059
2060
2061 /**
2062 * Determine whether a char is a digit.
2063 *
2064 * @return true if the char is betweeen '0' and '9', false otherwise
2065 */
2066 private static boolean isDigit(char p_char) {
2067 return p_char >= '0' && p_char <= '9';
2068 }
2069
2070 /**
2071 * Determine whether a character is a hexadecimal character.
2072 *
2073 * @return true if the char is betweeen '0' and '9', 'a' and 'f'
2074 * or 'A' and 'F', false otherwise
2075 */
2076 private static boolean isHex(char p_char) {
2077 return (p_char <= 'f' && (fgLookupTable[p_char] & ASCII_HEX_CHARACTERS) != 0);
2078 }
2079
2080 /**
2081 * Determine whether a char is an alphabetic character: a-z or A-Z
2082 *
2083 * @return true if the char is alphabetic, false otherwise
2084 */
2085 private static boolean isAlpha(char p_char) {
2086 return ((p_char >= 'a' && p_char <= 'z') || (p_char >= 'A' && p_char <= 'Z' ));
2087 }
2088
2089 /**
2090 * Determine whether a char is an alphanumeric: 0-9, a-z or A-Z
2091 *
2092 * @return true if the char is alphanumeric, false otherwise
2093 */
2094 private static boolean isAlphanum(char p_char) {
2095 return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_ALPHA_NUMERIC) != 0);
2096 }
2097
2098 /**
2099 * Determine whether a character is a reserved character:
2100 * ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '[', or ']'
2101 *
2102 * @return true if the string contains any reserved characters
2103 */
2104 private static boolean isReservedCharacter(char p_char) {
2105 return (p_char <= ']' && (fgLookupTable[p_char] & RESERVED_CHARACTERS) != 0);
2106 }
2107
2108 /**
2109 * Determine whether a char is an unreserved character.
2110 *
2111 * @return true if the char is unreserved, false otherwise
2112 */
2113 private static boolean isUnreservedCharacter(char p_char) {
2114 return (p_char <= '~' && (fgLookupTable[p_char] & MASK_UNRESERVED_MASK) != 0);
2115 }
2116
2117 /**
2118 * Determine whether a char is a URI character (reserved or
2119 * unreserved, not including '%' for escaped octets).
2120 *
2121 * @return true if the char is a URI character, false otherwise
2122 */
2123 private static boolean isURICharacter (char p_char) {
2124 return (p_char <= '~' && (fgLookupTable[p_char] & MASK_URI_CHARACTER) != 0);
2125 }
2126
2127 /**
2128 * Determine whether a char is a scheme character.
2129 *
2130 * @return true if the char is a scheme character, false otherwise
2131 */
2132 private static boolean isSchemeCharacter (char p_char) {
2133 return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_SCHEME_CHARACTER) != 0);
2134 }
2135
2136 /**
2137 * Determine whether a char is a userinfo character.
2138 *
2139 * @return true if the char is a userinfo character, false otherwise
2140 */
2141 private static boolean isUserinfoCharacter (char p_char) {
2142 return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_USERINFO_CHARACTER) != 0);
2143 }
2144
2145 /**
2146 * Determine whether a char is a path character.
2147 *
2148 * @return true if the char is a path character, false otherwise
2149 */
2150 private static boolean isPathCharacter (char p_char) {
2151 return (p_char <= '~' && (fgLookupTable[p_char] & MASK_PATH_CHARACTER) != 0);
2152 }
2153
2154
2155 /**
2156 * Determine whether a given string contains only URI characters (also
2157 * called "uric" in RFC 2396). uric consist of all reserved
2158 * characters, unreserved characters and escaped characters.
2159 *
2160 * @return true if the string is comprised of uric, false otherwise
2161 */
2162 private static boolean isURIString(String p_uric) {
2163 if (p_uric == null) {
2164 return false;
2165 }
2166 int end = p_uric.length();
2167 char testChar = '\0';
2168 for (int i = 0; i < end; i++) {
2169 testChar = p_uric.charAt(i);
2170 if (testChar == '%') {
2171 if (i+2 >= end ||
2172 !isHex(p_uric.charAt(i+1)) ||
2173 !isHex(p_uric.charAt(i+2))) {
2174 return false;
2175 }
2176 else {
2177 i += 2;
2178 continue;
2179 }
2180 }
2181 if (isURICharacter(testChar)) {
2182 continue;
2183 }
2184 else {
2185 return false;
2186 }
2187 }
2188 return true;
2189 }
2190 }