1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Copyright 1999-2004 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 * $Id: URI.java,v 1.2.4.1 2005/09/15 08:16:00 suresh_emailid Exp $ 22 */ 23 package com.sun.org.apache.xml.internal.utils; 24 25 import java.io.IOException; 26 import java.io.Serializable; 27 28 import com.sun.org.apache.xml.internal.res.XMLErrorResources; 29 import com.sun.org.apache.xml.internal.res.XMLMessages; 30 31 /** 32 * A class to represent a Uniform Resource Identifier (URI). This class 33 * is designed to handle the parsing of URIs and provide access to 34 * the various components (scheme, host, port, userinfo, path, query 35 * string and fragment) that may constitute a URI. 36 * <p> 37 * Parsing of a URI specification is done according to the URI 38 * syntax described in RFC 2396 39 * <http://www.ietf.org/rfc/rfc2396.txt?number=2396>. Every URI consists 40 * of a scheme, followed by a colon (':'), followed by a scheme-specific 41 * part. For URIs that follow the "generic URI" syntax, the scheme- 42 * specific part begins with two slashes ("//") and may be followed 43 * by an authority segment (comprised of user information, host, and 44 * port), path segment, query segment and fragment. Note that RFC 2396 45 * no longer specifies the use of the parameters segment and excludes 46 * the "user:password" syntax as part of the authority segment. If 47 * "user:password" appears in a URI, the entire user/password string 48 * is stored as userinfo. 49 * <p> 50 * For URIs that do not follow the "generic URI" syntax (e.g. mailto), 51 * the entire scheme-specific part is treated as the "path" portion 52 * of the URI. 53 * <p> 54 * Note that, unlike the java.net.URL class, this class does not provide 55 * any built-in network access functionality nor does it provide any 56 * scheme-specific functionality (for example, it does not know a 57 * default port for a specific scheme). Rather, it only knows the 58 * grammar and basic set of operations that can be applied to a URI. 59 * 60 * 61 */ 62 public class URI implements Serializable 63 { 64 static final long serialVersionUID = 7096266377907081897L; 65 66 /** 67 * MalformedURIExceptions are thrown in the process of building a URI 68 * or setting fields on a URI when an operation would result in an 69 * invalid URI specification. 70 * 71 */ 72 public static class MalformedURIException extends IOException 73 { 74 75 /** 76 * Constructs a <code>MalformedURIException</code> with no specified 77 * detail message. 78 */ 79 public MalformedURIException() 80 { 81 super(); 82 } 83 84 /** 85 * Constructs a <code>MalformedURIException</code> with the 86 * specified detail message. 87 * 88 * @param p_msg the detail message. 89 */ 90 public MalformedURIException(String p_msg) 91 { 92 super(p_msg); 93 } 94 } 95 96 /** reserved characters */ 97 private static final String RESERVED_CHARACTERS = ";/?:@&=+$,"; 98 99 /** 100 * URI punctuation mark characters - these, combined with 101 * alphanumerics, constitute the "unreserved" characters 102 */ 103 private static final String MARK_CHARACTERS = "-_.!~*'() "; 104 105 /** scheme can be composed of alphanumerics and these characters */ 106 private static final String SCHEME_CHARACTERS = "+-."; 107 108 /** 109 * userinfo can be composed of unreserved, escaped and these 110 * characters 111 */ 112 private static final String USERINFO_CHARACTERS = ";:&=+$,"; 113 114 /** Stores the scheme (usually the protocol) for this URI. 115 * @serial */ 116 private String m_scheme = null; 117 118 /** If specified, stores the userinfo for this URI; otherwise null. 119 * @serial */ 120 private String m_userinfo = null; 121 122 /** If specified, stores the host for this URI; otherwise null. 123 * @serial */ 124 private String m_host = null; 125 126 /** If specified, stores the port for this URI; otherwise -1. 127 * @serial */ 128 private int m_port = -1; 129 130 /** If specified, stores the path for this URI; otherwise null. 131 * @serial */ 132 private String m_path = null; 133 134 /** 135 * If specified, stores the query string for this URI; otherwise 136 * null. 137 * @serial 138 */ 139 private String m_queryString = null; 140 141 /** If specified, stores the fragment for this URI; otherwise null. 142 * @serial */ 143 private String m_fragment = null; 144 145 /** Indicate whether in DEBUG mode */ 146 private static boolean DEBUG = false; 147 148 /** 149 * Construct a new and uninitialized URI. 150 */ 151 public URI(){} 152 153 /** 154 * Construct a new URI from another URI. All fields for this URI are 155 * set equal to the fields of the URI passed in. 156 * 157 * @param p_other the URI to copy (cannot be null) 158 */ 159 public URI(URI p_other) 160 { 161 initialize(p_other); 162 } 163 164 /** 165 * Construct a new URI from a URI specification string. If the 166 * specification follows the "generic URI" syntax, (two slashes 167 * following the first colon), the specification will be parsed 168 * accordingly - setting the scheme, userinfo, host,port, path, query 169 * string and fragment fields as necessary. If the specification does 170 * not follow the "generic URI" syntax, the specification is parsed 171 * into a scheme and scheme-specific part (stored as the path) only. 172 * 173 * @param p_uriSpec the URI specification string (cannot be null or 174 * empty) 175 * 176 * @throws MalformedURIException if p_uriSpec violates any syntax 177 * rules 178 */ 179 public URI(String p_uriSpec) throws MalformedURIException 180 { 181 this((URI) null, p_uriSpec); 182 } 183 184 /** 185 * Construct a new URI from a base URI and a URI specification string. 186 * The URI specification string may be a relative URI. 187 * 188 * @param p_base the base URI (cannot be null if p_uriSpec is null or 189 * empty) 190 * @param p_uriSpec the URI specification string (cannot be null or 191 * empty if p_base is null) 192 * 193 * @throws MalformedURIException if p_uriSpec violates any syntax 194 * rules 195 */ 196 public URI(URI p_base, String p_uriSpec) throws MalformedURIException 197 { 198 initialize(p_base, p_uriSpec); 199 } 200 201 /** 202 * Construct a new URI that does not follow the generic URI syntax. 203 * Only the scheme and scheme-specific part (stored as the path) are 204 * initialized. 205 * 206 * @param p_scheme the URI scheme (cannot be null or empty) 207 * @param p_schemeSpecificPart the scheme-specific part (cannot be 208 * null or empty) 209 * 210 * @throws MalformedURIException if p_scheme violates any 211 * syntax rules 212 */ 213 public URI(String p_scheme, String p_schemeSpecificPart) 214 throws MalformedURIException 215 { 216 217 if (p_scheme == null || p_scheme.trim().length() == 0) 218 { 219 throw new MalformedURIException( 220 "Cannot construct URI with null/empty scheme!"); 221 } 222 223 if (p_schemeSpecificPart == null 224 || p_schemeSpecificPart.trim().length() == 0) 225 { 226 throw new MalformedURIException( 227 "Cannot construct URI with null/empty scheme-specific part!"); 228 } 229 230 setScheme(p_scheme); 231 setPath(p_schemeSpecificPart); 232 } 233 234 /** 235 * Construct a new URI that follows the generic URI syntax from its 236 * component parts. Each component is validated for syntax and some 237 * basic semantic checks are performed as well. See the individual 238 * setter methods for specifics. 239 * 240 * @param p_scheme the URI scheme (cannot be null or empty) 241 * @param p_host the hostname or IPv4 address for the URI 242 * @param p_path the URI path - if the path contains '?' or '#', 243 * then the query string and/or fragment will be 244 * set from the path; however, if the query and 245 * fragment are specified both in the path and as 246 * separate parameters, an exception is thrown 247 * @param p_queryString the URI query string (cannot be specified 248 * if path is null) 249 * @param p_fragment the URI fragment (cannot be specified if path 250 * is null) 251 * 252 * @throws MalformedURIException if any of the parameters violates 253 * syntax rules or semantic rules 254 */ 255 public URI(String p_scheme, String p_host, String p_path, String p_queryString, String p_fragment) 256 throws MalformedURIException 257 { 258 this(p_scheme, null, p_host, -1, p_path, p_queryString, p_fragment); 259 } 260 261 /** 262 * Construct a new URI that follows the generic URI syntax from its 263 * component parts. Each component is validated for syntax and some 264 * basic semantic checks are performed as well. See the individual 265 * setter methods for specifics. 266 * 267 * @param p_scheme the URI scheme (cannot be null or empty) 268 * @param p_userinfo the URI userinfo (cannot be specified if host 269 * is null) 270 * @param p_host the hostname or IPv4 address for the URI 271 * @param p_port the URI port (may be -1 for "unspecified"; cannot 272 * be specified if host is null) 273 * @param p_path the URI path - if the path contains '?' or '#', 274 * then the query string and/or fragment will be 275 * set from the path; however, if the query and 276 * fragment are specified both in the path and as 277 * separate parameters, an exception is thrown 278 * @param p_queryString the URI query string (cannot be specified 279 * if path is null) 280 * @param p_fragment the URI fragment (cannot be specified if path 281 * is null) 282 * 283 * @throws MalformedURIException if any of the parameters violates 284 * syntax rules or semantic rules 285 */ 286 public URI(String p_scheme, String p_userinfo, String p_host, int p_port, String p_path, String p_queryString, String p_fragment) 287 throws MalformedURIException 288 { 289 290 if (p_scheme == null || p_scheme.trim().length() == 0) 291 { 292 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_SCHEME_REQUIRED, null)); //"Scheme is required!"); 293 } 294 295 if (p_host == null) 296 { 297 if (p_userinfo != null) 298 { 299 throw new MalformedURIException( 300 XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_USERINFO_IF_NO_HOST, null)); //"Userinfo may not be specified if host is not specified!"); 301 } 302 303 if (p_port != -1) 304 { 305 throw new MalformedURIException( 306 XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_PORT_IF_NO_HOST, null)); //"Port may not be specified if host is not specified!"); 307 } 308 } 309 310 if (p_path != null) 311 { 312 if (p_path.indexOf('?') != -1 && p_queryString != null) 313 { 314 throw new MalformedURIException( 315 XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_QUERY_STRING_IN_PATH, null)); //"Query string cannot be specified in path and query string!"); 316 } 317 318 if (p_path.indexOf('#') != -1 && p_fragment != null) 319 { 320 throw new MalformedURIException( 321 XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_FRAGMENT_STRING_IN_PATH, null)); //"Fragment cannot be specified in both the path and fragment!"); 322 } 323 } 324 325 setScheme(p_scheme); 326 setHost(p_host); 327 setPort(p_port); 328 setUserinfo(p_userinfo); 329 setPath(p_path); 330 setQueryString(p_queryString); 331 setFragment(p_fragment); 332 } 333 334 /** 335 * Initialize all fields of this URI from another URI. 336 * 337 * @param p_other the URI to copy (cannot be null) 338 */ 339 private void initialize(URI p_other) 340 { 341 342 m_scheme = p_other.getScheme(); 343 m_userinfo = p_other.getUserinfo(); 344 m_host = p_other.getHost(); 345 m_port = p_other.getPort(); 346 m_path = p_other.getPath(); 347 m_queryString = p_other.getQueryString(); 348 m_fragment = p_other.getFragment(); 349 } 350 351 /** 352 * Initializes this URI from a base URI and a URI specification string. 353 * See RFC 2396 Section 4 and Appendix B for specifications on parsing 354 * the URI and Section 5 for specifications on resolving relative URIs 355 * and relative paths. 356 * 357 * @param p_base the base URI (may be null if p_uriSpec is an absolute 358 * URI) 359 * @param p_uriSpec the URI spec string which may be an absolute or 360 * relative URI (can only be null/empty if p_base 361 * is not null) 362 * 363 * @throws MalformedURIException if p_base is null and p_uriSpec 364 * is not an absolute URI or if 365 * p_uriSpec violates syntax rules 366 */ 367 private void initialize(URI p_base, String p_uriSpec) 368 throws MalformedURIException 369 { 370 371 if (p_base == null 372 && (p_uriSpec == null || p_uriSpec.trim().length() == 0)) 373 { 374 throw new MalformedURIException( 375 XMLMessages.createXMLMessage(XMLErrorResources.ER_CANNOT_INIT_URI_EMPTY_PARMS, null)); //"Cannot initialize URI with empty parameters."); 376 } 377 378 // just make a copy of the base if spec is empty 379 if (p_uriSpec == null || p_uriSpec.trim().length() == 0) 380 { 381 initialize(p_base); 382 383 return; 384 } 385 386 String uriSpec = p_uriSpec.trim(); 387 int uriSpecLen = uriSpec.length(); 388 int index = 0; 389 390 // check for scheme 391 int colonIndex = uriSpec.indexOf(':'); 392 if (colonIndex < 0) 393 { 394 if (p_base == null) 395 { 396 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_SCHEME_IN_URI, new Object[]{uriSpec})); //"No scheme found in URI: "+uriSpec); 397 } 398 } 399 else 400 { 401 initializeScheme(uriSpec); 402 uriSpec = uriSpec.substring(colonIndex+1); 403 // This is a fix for XALANJ-2059. 404 if(m_scheme != null && p_base != null) 405 { 406 // a) If <uriSpec> starts with a slash (/), it means <uriSpec> is absolute 407 // and p_base can be ignored. 408 // For example, 409 // uriSpec = file:/myDIR/myXSLFile.xsl 410 // p_base = file:/myWork/ 411 // 412 // Here, uriSpec has absolute path after scheme file and : 413 // Hence p_base can be ignored. 414 // 415 // b) Similarily, according to RFC 2396, uri is resolved for <uriSpec> relative to <p_base> 416 // if scheme in <uriSpec> is same as scheme in <p_base>, else p_base can be ignored. 417 // 418 // c) if <p_base> is not hierarchical, it can be ignored. 419 // 420 if(uriSpec.startsWith("/") || !m_scheme.equals(p_base.m_scheme) || !p_base.getSchemeSpecificPart().startsWith("/")) 421 { 422 p_base = null; 423 } 424 } 425 // Fix for XALANJ-2059 426 uriSpecLen = uriSpec.length(); 427 } 428 429 // two slashes means generic URI syntax, so we get the authority 430 if (((index + 1) < uriSpecLen) 431 && (uriSpec.substring(index).startsWith("//"))) 432 { 433 index += 2; 434 435 int startPos = index; 436 437 // get authority - everything up to path, query or fragment 438 char testChar = '\0'; 439 440 while (index < uriSpecLen) 441 { 442 testChar = uriSpec.charAt(index); 443 444 if (testChar == '/' || testChar == '?' || testChar == '#') 445 { 446 break; 447 } 448 449 index++; 450 } 451 452 // if we found authority, parse it out, otherwise we set the 453 // host to empty string 454 if (index > startPos) 455 { 456 initializeAuthority(uriSpec.substring(startPos, index)); 457 } 458 else 459 { 460 m_host = ""; 461 } 462 } 463 464 initializePath(uriSpec.substring(index)); 465 466 // Resolve relative URI to base URI - see RFC 2396 Section 5.2 467 // In some cases, it might make more sense to throw an exception 468 // (when scheme is specified is the string spec and the base URI 469 // is also specified, for example), but we're just following the 470 // RFC specifications 471 if (p_base != null) 472 { 473 474 // check to see if this is the current doc - RFC 2396 5.2 #2 475 // note that this is slightly different from the RFC spec in that 476 // we don't include the check for query string being null 477 // - this handles cases where the urispec is just a query 478 // string or a fragment (e.g. "?y" or "#s") - 479 // see <http://www.ics.uci.edu/~fielding/url/test1.html> which 480 // identified this as a bug in the RFC 481 if (m_path.length() == 0 && m_scheme == null && m_host == null) 482 { 483 m_scheme = p_base.getScheme(); 484 m_userinfo = p_base.getUserinfo(); 485 m_host = p_base.getHost(); 486 m_port = p_base.getPort(); 487 m_path = p_base.getPath(); 488 489 if (m_queryString == null) 490 { 491 m_queryString = p_base.getQueryString(); 492 } 493 494 return; 495 } 496 497 // check for scheme - RFC 2396 5.2 #3 498 // if we found a scheme, it means absolute URI, so we're done 499 if (m_scheme == null) 500 { 501 m_scheme = p_base.getScheme(); 502 } 503 504 // check for authority - RFC 2396 5.2 #4 505 // if we found a host, then we've got a network path, so we're done 506 if (m_host == null) 507 { 508 m_userinfo = p_base.getUserinfo(); 509 m_host = p_base.getHost(); 510 m_port = p_base.getPort(); 511 } 512 else 513 { 514 return; 515 } 516 517 // check for absolute path - RFC 2396 5.2 #5 518 if (m_path.length() > 0 && m_path.startsWith("/")) 519 { 520 return; 521 } 522 523 // if we get to this point, we need to resolve relative path 524 // RFC 2396 5.2 #6 525 String path = ""; 526 String basePath = p_base.getPath(); 527 528 // 6a - get all but the last segment of the base URI path 529 if (basePath != null) 530 { 531 int lastSlash = basePath.lastIndexOf('/'); 532 533 if (lastSlash != -1) 534 { 535 path = basePath.substring(0, lastSlash + 1); 536 } 537 } 538 539 // 6b - append the relative URI path 540 path = path.concat(m_path); 541 542 // 6c - remove all "./" where "." is a complete path segment 543 index = -1; 544 545 while ((index = path.indexOf("/./")) != -1) 546 { 547 path = path.substring(0, index + 1).concat(path.substring(index + 3)); 548 } 549 550 // 6d - remove "." if path ends with "." as a complete path segment 551 if (path.endsWith("/.")) 552 { 553 path = path.substring(0, path.length() - 1); 554 } 555 556 // 6e - remove all "<segment>/../" where "<segment>" is a complete 557 // path segment not equal to ".." 558 index = -1; 559 560 int segIndex = -1; 561 String tempString = null; 562 563 while ((index = path.indexOf("/../")) > 0) 564 { 565 tempString = path.substring(0, path.indexOf("/../")); 566 segIndex = tempString.lastIndexOf('/'); 567 568 if (segIndex != -1) 569 { 570 if (!tempString.substring(segIndex++).equals("..")) 571 { 572 path = path.substring(0, segIndex).concat(path.substring(index 573 + 4)); 574 } 575 } 576 } 577 578 // 6f - remove ending "<segment>/.." where "<segment>" is a 579 // complete path segment 580 if (path.endsWith("/..")) 581 { 582 tempString = path.substring(0, path.length() - 3); 583 segIndex = tempString.lastIndexOf('/'); 584 585 if (segIndex != -1) 586 { 587 path = path.substring(0, segIndex + 1); 588 } 589 } 590 591 m_path = path; 592 } 593 } 594 595 /** 596 * Initialize the scheme for this URI from a URI string spec. 597 * 598 * @param p_uriSpec the URI specification (cannot be null) 599 * 600 * @throws MalformedURIException if URI does not have a conformant 601 * scheme 602 */ 603 private void initializeScheme(String p_uriSpec) throws MalformedURIException 604 { 605 606 int uriSpecLen = p_uriSpec.length(); 607 int index = 0; 608 String scheme = null; 609 char testChar = '\0'; 610 611 while (index < uriSpecLen) 612 { 613 testChar = p_uriSpec.charAt(index); 614 615 if (testChar == ':' || testChar == '/' || testChar == '?' 616 || testChar == '#') 617 { 618 break; 619 } 620 621 index++; 622 } 623 624 scheme = p_uriSpec.substring(0, index); 625 626 if (scheme.length() == 0) 627 { 628 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_SCHEME_INURI, null)); //"No scheme found in URI."); 629 } 630 else 631 { 632 setScheme(scheme); 633 } 634 } 635 636 /** 637 * Initialize the authority (userinfo, host and port) for this 638 * URI from a URI string spec. 639 * 640 * @param p_uriSpec the URI specification (cannot be null) 641 * 642 * @throws MalformedURIException if p_uriSpec violates syntax rules 643 */ 644 private void initializeAuthority(String p_uriSpec) 645 throws MalformedURIException 646 { 647 648 int index = 0; 649 int start = 0; 650 int end = p_uriSpec.length(); 651 char testChar = '\0'; 652 String userinfo = null; 653 654 // userinfo is everything up @ 655 if (p_uriSpec.indexOf('@', start) != -1) 656 { 657 while (index < end) 658 { 659 testChar = p_uriSpec.charAt(index); 660 661 if (testChar == '@') 662 { 663 break; 664 } 665 666 index++; 667 } 668 669 userinfo = p_uriSpec.substring(start, index); 670 671 index++; 672 } 673 674 // host is everything up to ':' 675 String host = null; 676 677 start = index; 678 679 while (index < end) 680 { 681 testChar = p_uriSpec.charAt(index); 682 683 if (testChar == ':') 684 { 685 break; 686 } 687 688 index++; 689 } 690 691 host = p_uriSpec.substring(start, index); 692 693 int port = -1; 694 695 if (host.length() > 0) 696 { 697 698 // port 699 if (testChar == ':') 700 { 701 index++; 702 703 start = index; 704 705 while (index < end) 706 { 707 index++; 708 } 709 710 String portStr = p_uriSpec.substring(start, index); 711 712 if (portStr.length() > 0) 713 { 714 for (int i = 0; i < portStr.length(); i++) 715 { 716 if (!isDigit(portStr.charAt(i))) 717 { 718 throw new MalformedURIException( 719 portStr + " is invalid. Port should only contain digits!"); 720 } 721 } 722 723 try 724 { 725 port = Integer.parseInt(portStr); 726 } 727 catch (NumberFormatException nfe) 728 { 729 730 // can't happen 731 } 732 } 733 } 734 } 735 736 setHost(host); 737 setPort(port); 738 setUserinfo(userinfo); 739 } 740 741 /** 742 * Initialize the path for this URI from a URI string spec. 743 * 744 * @param p_uriSpec the URI specification (cannot be null) 745 * 746 * @throws MalformedURIException if p_uriSpec violates syntax rules 747 */ 748 private void initializePath(String p_uriSpec) throws MalformedURIException 749 { 750 751 if (p_uriSpec == null) 752 { 753 throw new MalformedURIException( 754 "Cannot initialize path from null string!"); 755 } 756 757 int index = 0; 758 int start = 0; 759 int end = p_uriSpec.length(); 760 char testChar = '\0'; 761 762 // path - everything up to query string or fragment 763 while (index < end) 764 { 765 testChar = p_uriSpec.charAt(index); 766 767 if (testChar == '?' || testChar == '#') 768 { 769 break; 770 } 771 772 // check for valid escape sequence 773 if (testChar == '%') 774 { 775 if (index + 2 >= end ||!isHex(p_uriSpec.charAt(index + 1)) 776 ||!isHex(p_uriSpec.charAt(index + 2))) 777 { 778 throw new MalformedURIException( 779 XMLMessages.createXMLMessage(XMLErrorResources.ER_PATH_CONTAINS_INVALID_ESCAPE_SEQUENCE, null)); //"Path contains invalid escape sequence!"); 780 } 781 } 782 else if (!isReservedCharacter(testChar) 783 &&!isUnreservedCharacter(testChar)) 784 { 785 if ('\\' != testChar) 786 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_PATH_INVALID_CHAR, new Object[]{String.valueOf(testChar)})); //"Path contains invalid character: " 787 //+ testChar); 788 } 789 790 index++; 791 } 792 793 m_path = p_uriSpec.substring(start, index); 794 795 // query - starts with ? and up to fragment or end 796 if (testChar == '?') 797 { 798 index++; 799 800 start = index; 801 802 while (index < end) 803 { 804 testChar = p_uriSpec.charAt(index); 805 806 if (testChar == '#') 807 { 808 break; 809 } 810 811 if (testChar == '%') 812 { 813 if (index + 2 >= end ||!isHex(p_uriSpec.charAt(index + 1)) 814 ||!isHex(p_uriSpec.charAt(index + 2))) 815 { 816 throw new MalformedURIException( 817 "Query string contains invalid escape sequence!"); 818 } 819 } 820 else if (!isReservedCharacter(testChar) 821 &&!isUnreservedCharacter(testChar)) 822 { 823 throw new MalformedURIException( 824 "Query string contains invalid character:" + testChar); 825 } 826 827 index++; 828 } 829 830 m_queryString = p_uriSpec.substring(start, index); 831 } 832 833 // fragment - starts with # 834 if (testChar == '#') 835 { 836 index++; 837 838 start = index; 839 840 while (index < end) 841 { 842 testChar = p_uriSpec.charAt(index); 843 844 if (testChar == '%') 845 { 846 if (index + 2 >= end ||!isHex(p_uriSpec.charAt(index + 1)) 847 ||!isHex(p_uriSpec.charAt(index + 2))) 848 { 849 throw new MalformedURIException( 850 "Fragment contains invalid escape sequence!"); 851 } 852 } 853 else if (!isReservedCharacter(testChar) 854 &&!isUnreservedCharacter(testChar)) 855 { 856 throw new MalformedURIException( 857 "Fragment contains invalid character:" + testChar); 858 } 859 860 index++; 861 } 862 863 m_fragment = p_uriSpec.substring(start, index); 864 } 865 } 866 867 /** 868 * Get the scheme for this URI. 869 * 870 * @return the scheme for this URI 871 */ 872 public String getScheme() 873 { 874 return m_scheme; 875 } 876 877 /** 878 * Get the scheme-specific part for this URI (everything following the 879 * scheme and the first colon). See RFC 2396 Section 5.2 for spec. 880 * 881 * @return the scheme-specific part for this URI 882 */ 883 public String getSchemeSpecificPart() 884 { 885 886 StringBuffer schemespec = new StringBuffer(); 887 888 if (m_userinfo != null || m_host != null || m_port != -1) 889 { 890 schemespec.append("//"); 891 } 892 893 if (m_userinfo != null) 894 { 895 schemespec.append(m_userinfo); 896 schemespec.append('@'); 897 } 898 899 if (m_host != null) 900 { 901 schemespec.append(m_host); 902 } 903 904 if (m_port != -1) 905 { 906 schemespec.append(':'); 907 schemespec.append(m_port); 908 } 909 910 if (m_path != null) 911 { 912 schemespec.append((m_path)); 913 } 914 915 if (m_queryString != null) 916 { 917 schemespec.append('?'); 918 schemespec.append(m_queryString); 919 } 920 921 if (m_fragment != null) 922 { 923 schemespec.append('#'); 924 schemespec.append(m_fragment); 925 } 926 927 return schemespec.toString(); 928 } 929 930 /** 931 * Get the userinfo for this URI. 932 * 933 * @return the userinfo for this URI (null if not specified). 934 */ 935 public String getUserinfo() 936 { 937 return m_userinfo; 938 } 939 940 /** 941 * Get the host for this URI. 942 * 943 * @return the host for this URI (null if not specified). 944 */ 945 public String getHost() 946 { 947 return m_host; 948 } 949 950 /** 951 * Get the port for this URI. 952 * 953 * @return the port for this URI (-1 if not specified). 954 */ 955 public int getPort() 956 { 957 return m_port; 958 } 959 960 /** 961 * Get the path for this URI (optionally with the query string and 962 * fragment). 963 * 964 * @param p_includeQueryString if true (and query string is not null), 965 * then a "?" followed by the query string 966 * will be appended 967 * @param p_includeFragment if true (and fragment is not null), 968 * then a "#" followed by the fragment 969 * will be appended 970 * 971 * @return the path for this URI possibly including the query string 972 * and fragment 973 */ 974 public String getPath(boolean p_includeQueryString, 975 boolean p_includeFragment) 976 { 977 978 StringBuffer pathString = new StringBuffer(m_path); 979 980 if (p_includeQueryString && m_queryString != null) 981 { 982 pathString.append('?'); 983 pathString.append(m_queryString); 984 } 985 986 if (p_includeFragment && m_fragment != null) 987 { 988 pathString.append('#'); 989 pathString.append(m_fragment); 990 } 991 992 return pathString.toString(); 993 } 994 995 /** 996 * Get the path for this URI. Note that the value returned is the path 997 * only and does not include the query string or fragment. 998 * 999 * @return the path for this URI. 1000 */ 1001 public String getPath() 1002 { 1003 return m_path; 1004 } 1005 1006 /** 1007 * Get the query string for this URI. 1008 * 1009 * @return the query string for this URI. Null is returned if there 1010 * was no "?" in the URI spec, empty string if there was a 1011 * "?" but no query string following it. 1012 */ 1013 public String getQueryString() 1014 { 1015 return m_queryString; 1016 } 1017 1018 /** 1019 * Get the fragment for this URI. 1020 * 1021 * @return the fragment for this URI. Null is returned if there 1022 * was no "#" in the URI spec, empty string if there was a 1023 * "#" but no fragment following it. 1024 */ 1025 public String getFragment() 1026 { 1027 return m_fragment; 1028 } 1029 1030 /** 1031 * Set the scheme for this URI. The scheme is converted to lowercase 1032 * before it is set. 1033 * 1034 * @param p_scheme the scheme for this URI (cannot be null) 1035 * 1036 * @throws MalformedURIException if p_scheme is not a conformant 1037 * scheme name 1038 */ 1039 public void setScheme(String p_scheme) throws MalformedURIException 1040 { 1041 1042 if (p_scheme == null) 1043 { 1044 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_SCHEME_FROM_NULL_STRING, null)); //"Cannot set scheme from null string!"); 1045 } 1046 1047 if (!isConformantSchemeName(p_scheme)) 1048 { 1049 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_SCHEME_NOT_CONFORMANT, null)); //"The scheme is not conformant."); 1050 } 1051 1052 m_scheme = p_scheme.toLowerCase(); 1053 } 1054 1055 /** 1056 * Set the userinfo for this URI. If a non-null value is passed in and 1057 * the host value is null, then an exception is thrown. 1058 * 1059 * @param p_userinfo the userinfo for this URI 1060 * 1061 * @throws MalformedURIException if p_userinfo contains invalid 1062 * characters 1063 */ 1064 public void setUserinfo(String p_userinfo) throws MalformedURIException 1065 { 1066 1067 if (p_userinfo == null) 1068 { 1069 m_userinfo = null; 1070 } 1071 else 1072 { 1073 if (m_host == null) 1074 { 1075 throw new MalformedURIException( 1076 "Userinfo cannot be set when host is null!"); 1077 } 1078 1079 // userinfo can contain alphanumerics, mark characters, escaped 1080 // and ';',':','&','=','+','$',',' 1081 int index = 0; 1082 int end = p_userinfo.length(); 1083 char testChar = '\0'; 1084 1085 while (index < end) 1086 { 1087 testChar = p_userinfo.charAt(index); 1088 1089 if (testChar == '%') 1090 { 1091 if (index + 2 >= end ||!isHex(p_userinfo.charAt(index + 1)) 1092 ||!isHex(p_userinfo.charAt(index + 2))) 1093 { 1094 throw new MalformedURIException( 1095 "Userinfo contains invalid escape sequence!"); 1096 } 1097 } 1098 else if (!isUnreservedCharacter(testChar) 1099 && USERINFO_CHARACTERS.indexOf(testChar) == -1) 1100 { 1101 throw new MalformedURIException( 1102 "Userinfo contains invalid character:" + testChar); 1103 } 1104 1105 index++; 1106 } 1107 } 1108 1109 m_userinfo = p_userinfo; 1110 } 1111 1112 /** 1113 * Set the host for this URI. If null is passed in, the userinfo 1114 * field is also set to null and the port is set to -1. 1115 * 1116 * @param p_host the host for this URI 1117 * 1118 * @throws MalformedURIException if p_host is not a valid IP 1119 * address or DNS hostname. 1120 */ 1121 public void setHost(String p_host) throws MalformedURIException 1122 { 1123 1124 if (p_host == null || p_host.trim().length() == 0) 1125 { 1126 m_host = p_host; 1127 m_userinfo = null; 1128 m_port = -1; 1129 } 1130 else if (!isWellFormedAddress(p_host)) 1131 { 1132 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_HOST_ADDRESS_NOT_WELLFORMED, null)); //"Host is not a well formed address!"); 1133 } 1134 1135 m_host = p_host; 1136 } 1137 1138 /** 1139 * Set the port for this URI. -1 is used to indicate that the port is 1140 * not specified, otherwise valid port numbers are between 0 and 65535. 1141 * If a valid port number is passed in and the host field is null, 1142 * an exception is thrown. 1143 * 1144 * @param p_port the port number for this URI 1145 * 1146 * @throws MalformedURIException if p_port is not -1 and not a 1147 * valid port number 1148 */ 1149 public void setPort(int p_port) throws MalformedURIException 1150 { 1151 1152 if (p_port >= 0 && p_port <= 65535) 1153 { 1154 if (m_host == null) 1155 { 1156 throw new MalformedURIException( 1157 XMLMessages.createXMLMessage(XMLErrorResources.ER_PORT_WHEN_HOST_NULL, null)); //"Port cannot be set when host is null!"); 1158 } 1159 } 1160 else if (p_port != -1) 1161 { 1162 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_INVALID_PORT, null)); //"Invalid port number!"); 1163 } 1164 1165 m_port = p_port; 1166 } 1167 1168 /** 1169 * Set the path for this URI. If the supplied path is null, then the 1170 * query string and fragment are set to null as well. If the supplied 1171 * path includes a query string and/or fragment, these fields will be 1172 * parsed and set as well. Note that, for URIs following the "generic 1173 * URI" syntax, the path specified should start with a slash. 1174 * For URIs that do not follow the generic URI syntax, this method 1175 * sets the scheme-specific part. 1176 * 1177 * @param p_path the path for this URI (may be null) 1178 * 1179 * @throws MalformedURIException if p_path contains invalid 1180 * characters 1181 */ 1182 public void setPath(String p_path) throws MalformedURIException 1183 { 1184 1185 if (p_path == null) 1186 { 1187 m_path = null; 1188 m_queryString = null; 1189 m_fragment = null; 1190 } 1191 else 1192 { 1193 initializePath(p_path); 1194 } 1195 } 1196 1197 /** 1198 * Append to the end of the path of this URI. If the current path does 1199 * not end in a slash and the path to be appended does not begin with 1200 * a slash, a slash will be appended to the current path before the 1201 * new segment is added. Also, if the current path ends in a slash 1202 * and the new segment begins with a slash, the extra slash will be 1203 * removed before the new segment is appended. 1204 * 1205 * @param p_addToPath the new segment to be added to the current path 1206 * 1207 * @throws MalformedURIException if p_addToPath contains syntax 1208 * errors 1209 */ 1210 public void appendPath(String p_addToPath) throws MalformedURIException 1211 { 1212 1213 if (p_addToPath == null || p_addToPath.trim().length() == 0) 1214 { 1215 return; 1216 } 1217 1218 if (!isURIString(p_addToPath)) 1219 { 1220 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_PATH_INVALID_CHAR, new Object[]{p_addToPath})); //"Path contains invalid character!"); 1221 } 1222 1223 if (m_path == null || m_path.trim().length() == 0) 1224 { 1225 if (p_addToPath.startsWith("/")) 1226 { 1227 m_path = p_addToPath; 1228 } 1229 else 1230 { 1231 m_path = "/" + p_addToPath; 1232 } 1233 } 1234 else if (m_path.endsWith("/")) 1235 { 1236 if (p_addToPath.startsWith("/")) 1237 { 1238 m_path = m_path.concat(p_addToPath.substring(1)); 1239 } 1240 else 1241 { 1242 m_path = m_path.concat(p_addToPath); 1243 } 1244 } 1245 else 1246 { 1247 if (p_addToPath.startsWith("/")) 1248 { 1249 m_path = m_path.concat(p_addToPath); 1250 } 1251 else 1252 { 1253 m_path = m_path.concat("/" + p_addToPath); 1254 } 1255 } 1256 } 1257 1258 /** 1259 * Set the query string for this URI. A non-null value is valid only 1260 * if this is an URI conforming to the generic URI syntax and 1261 * the path value is not null. 1262 * 1263 * @param p_queryString the query string for this URI 1264 * 1265 * @throws MalformedURIException if p_queryString is not null and this 1266 * URI does not conform to the generic 1267 * URI syntax or if the path is null 1268 */ 1269 public void setQueryString(String p_queryString) 1270 throws MalformedURIException 1271 { 1272 1273 if (p_queryString == null) 1274 { 1275 m_queryString = null; 1276 } 1277 else if (!isGenericURI()) 1278 { 1279 throw new MalformedURIException( 1280 "Query string can only be set for a generic URI!"); 1281 } 1282 else if (getPath() == null) 1283 { 1284 throw new MalformedURIException( 1285 "Query string cannot be set when path is null!"); 1286 } 1287 else if (!isURIString(p_queryString)) 1288 { 1289 throw new MalformedURIException( 1290 "Query string contains invalid character!"); 1291 } 1292 else 1293 { 1294 m_queryString = p_queryString; 1295 } 1296 } 1297 1298 /** 1299 * Set the fragment for this URI. A non-null value is valid only 1300 * if this is a URI conforming to the generic URI syntax and 1301 * the path value is not null. 1302 * 1303 * @param p_fragment the fragment for this URI 1304 * 1305 * @throws MalformedURIException if p_fragment is not null and this 1306 * URI does not conform to the generic 1307 * URI syntax or if the path is null 1308 */ 1309 public void setFragment(String p_fragment) throws MalformedURIException 1310 { 1311 1312 if (p_fragment == null) 1313 { 1314 m_fragment = null; 1315 } 1316 else if (!isGenericURI()) 1317 { 1318 throw new MalformedURIException( 1319 XMLMessages.createXMLMessage(XMLErrorResources.ER_FRAG_FOR_GENERIC_URI, null)); //"Fragment can only be set for a generic URI!"); 1320 } 1321 else if (getPath() == null) 1322 { 1323 throw new MalformedURIException( 1324 XMLMessages.createXMLMessage(XMLErrorResources.ER_FRAG_WHEN_PATH_NULL, null)); //"Fragment cannot be set when path is null!"); 1325 } 1326 else if (!isURIString(p_fragment)) 1327 { 1328 throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_FRAG_INVALID_CHAR, null)); //"Fragment contains invalid character!"); 1329 } 1330 else 1331 { 1332 m_fragment = p_fragment; 1333 } 1334 } 1335 1336 /** 1337 * Determines if the passed-in Object is equivalent to this URI. 1338 * 1339 * @param p_test the Object to test for equality. 1340 * 1341 * @return true if p_test is a URI with all values equal to this 1342 * URI, false otherwise 1343 */ 1344 public boolean equals(Object p_test) 1345 { 1346 1347 if (p_test instanceof URI) 1348 { 1349 URI testURI = (URI) p_test; 1350 1351 if (((m_scheme == null && testURI.m_scheme == null) || (m_scheme != null && testURI.m_scheme != null && m_scheme.equals( 1352 testURI.m_scheme))) && ((m_userinfo == null && testURI.m_userinfo == null) || (m_userinfo != null && testURI.m_userinfo != null && m_userinfo.equals( 1353 testURI.m_userinfo))) && ((m_host == null && testURI.m_host == null) || (m_host != null && testURI.m_host != null && m_host.equals( 1354 testURI.m_host))) && m_port == testURI.m_port && ((m_path == null && testURI.m_path == null) || (m_path != null && testURI.m_path != null && m_path.equals( 1355 testURI.m_path))) && ((m_queryString == null && testURI.m_queryString == null) || (m_queryString != null && testURI.m_queryString != null && m_queryString.equals( 1356 testURI.m_queryString))) && ((m_fragment == null && testURI.m_fragment == null) || (m_fragment != null && testURI.m_fragment != null && m_fragment.equals( 1357 testURI.m_fragment)))) 1358 { 1359 return true; 1360 } 1361 } 1362 1363 return false; 1364 } 1365 1366 /** 1367 * Get the URI as a string specification. See RFC 2396 Section 5.2. 1368 * 1369 * @return the URI string specification 1370 */ 1371 public String toString() 1372 { 1373 1374 StringBuffer uriSpecString = new StringBuffer(); 1375 1376 if (m_scheme != null) 1377 { 1378 uriSpecString.append(m_scheme); 1379 uriSpecString.append(':'); 1380 } 1381 1382 uriSpecString.append(getSchemeSpecificPart()); 1383 1384 return uriSpecString.toString(); 1385 } 1386 1387 /** 1388 * Get the indicator as to whether this URI uses the "generic URI" 1389 * syntax. 1390 * 1391 * @return true if this URI uses the "generic URI" syntax, false 1392 * otherwise 1393 */ 1394 public boolean isGenericURI() 1395 { 1396 1397 // presence of the host (whether valid or empty) means 1398 // double-slashes which means generic uri 1399 return (m_host != null); 1400 } 1401 1402 /** 1403 * Determine whether a scheme conforms to the rules for a scheme name. 1404 * A scheme is conformant if it starts with an alphanumeric, and 1405 * contains only alphanumerics, '+','-' and '.'. 1406 * 1407 * 1408 * @param p_scheme The sheme name to check 1409 * @return true if the scheme is conformant, false otherwise 1410 */ 1411 public static boolean isConformantSchemeName(String p_scheme) 1412 { 1413 1414 if (p_scheme == null || p_scheme.trim().length() == 0) 1415 { 1416 return false; 1417 } 1418 1419 if (!isAlpha(p_scheme.charAt(0))) 1420 { 1421 return false; 1422 } 1423 1424 char testChar; 1425 1426 for (int i = 1; i < p_scheme.length(); i++) 1427 { 1428 testChar = p_scheme.charAt(i); 1429 1430 if (!isAlphanum(testChar) && SCHEME_CHARACTERS.indexOf(testChar) == -1) 1431 { 1432 return false; 1433 } 1434 } 1435 1436 return true; 1437 } 1438 1439 /** 1440 * Determine whether a string is syntactically capable of representing 1441 * a valid IPv4 address or the domain name of a network host. A valid 1442 * IPv4 address consists of four decimal digit groups separated by a 1443 * '.'. A hostname consists of domain labels (each of which must 1444 * begin and end with an alphanumeric but may contain '-') separated 1445 * & by a '.'. See RFC 2396 Section 3.2.2. 1446 * 1447 * 1448 * @param p_address The address string to check 1449 * @return true if the string is a syntactically valid IPv4 address 1450 * or hostname 1451 */ 1452 public static boolean isWellFormedAddress(String p_address) 1453 { 1454 1455 if (p_address == null) 1456 { 1457 return false; 1458 } 1459 1460 String address = p_address.trim(); 1461 int addrLength = address.length(); 1462 1463 if (addrLength == 0 || addrLength > 255) 1464 { 1465 return false; 1466 } 1467 1468 if (address.startsWith(".") || address.startsWith("-")) 1469 { 1470 return false; 1471 } 1472 1473 // rightmost domain label starting with digit indicates IP address 1474 // since top level domain label can only start with an alpha 1475 // see RFC 2396 Section 3.2.2 1476 int index = address.lastIndexOf('.'); 1477 1478 if (address.endsWith(".")) 1479 { 1480 index = address.substring(0, index).lastIndexOf('.'); 1481 } 1482 1483 if (index + 1 < addrLength && isDigit(p_address.charAt(index + 1))) 1484 { 1485 char testChar; 1486 int numDots = 0; 1487 1488 // make sure that 1) we see only digits and dot separators, 2) that 1489 // any dot separator is preceded and followed by a digit and 1490 // 3) that we find 3 dots 1491 for (int i = 0; i < addrLength; i++) 1492 { 1493 testChar = address.charAt(i); 1494 1495 if (testChar == '.') 1496 { 1497 if (!isDigit(address.charAt(i - 1)) 1498 || (i + 1 < addrLength &&!isDigit(address.charAt(i + 1)))) 1499 { 1500 return false; 1501 } 1502 1503 numDots++; 1504 } 1505 else if (!isDigit(testChar)) 1506 { 1507 return false; 1508 } 1509 } 1510 1511 if (numDots != 3) 1512 { 1513 return false; 1514 } 1515 } 1516 else 1517 { 1518 1519 // domain labels can contain alphanumerics and '-" 1520 // but must start and end with an alphanumeric 1521 char testChar; 1522 1523 for (int i = 0; i < addrLength; i++) 1524 { 1525 testChar = address.charAt(i); 1526 1527 if (testChar == '.') 1528 { 1529 if (!isAlphanum(address.charAt(i - 1))) 1530 { 1531 return false; 1532 } 1533 1534 if (i + 1 < addrLength &&!isAlphanum(address.charAt(i + 1))) 1535 { 1536 return false; 1537 } 1538 } 1539 else if (!isAlphanum(testChar) && testChar != '-') 1540 { 1541 return false; 1542 } 1543 } 1544 } 1545 1546 return true; 1547 } 1548 1549 /** 1550 * Determine whether a char is a digit. 1551 * 1552 * 1553 * @param p_char the character to check 1554 * @return true if the char is betweeen '0' and '9', false otherwise 1555 */ 1556 private static boolean isDigit(char p_char) 1557 { 1558 return p_char >= '0' && p_char <= '9'; 1559 } 1560 1561 /** 1562 * Determine whether a character is a hexadecimal character. 1563 * 1564 * 1565 * @param p_char the character to check 1566 * @return true if the char is betweeen '0' and '9', 'a' and 'f' 1567 * or 'A' and 'F', false otherwise 1568 */ 1569 private static boolean isHex(char p_char) 1570 { 1571 return (isDigit(p_char) || (p_char >= 'a' && p_char <= 'f') 1572 || (p_char >= 'A' && p_char <= 'F')); 1573 } 1574 1575 /** 1576 * Determine whether a char is an alphabetic character: a-z or A-Z 1577 * 1578 * 1579 * @param p_char the character to check 1580 * @return true if the char is alphabetic, false otherwise 1581 */ 1582 private static boolean isAlpha(char p_char) 1583 { 1584 return ((p_char >= 'a' && p_char <= 'z') 1585 || (p_char >= 'A' && p_char <= 'Z')); 1586 } 1587 1588 /** 1589 * Determine whether a char is an alphanumeric: 0-9, a-z or A-Z 1590 * 1591 * 1592 * @param p_char the character to check 1593 * @return true if the char is alphanumeric, false otherwise 1594 */ 1595 private static boolean isAlphanum(char p_char) 1596 { 1597 return (isAlpha(p_char) || isDigit(p_char)); 1598 } 1599 1600 /** 1601 * Determine whether a character is a reserved character: 1602 * ';', '/', '?', ':', '@', '&', '=', '+', '$' or ',' 1603 * 1604 * 1605 * @param p_char the character to check 1606 * @return true if the string contains any reserved characters 1607 */ 1608 private static boolean isReservedCharacter(char p_char) 1609 { 1610 return RESERVED_CHARACTERS.indexOf(p_char) != -1; 1611 } 1612 1613 /** 1614 * Determine whether a char is an unreserved character. 1615 * 1616 * 1617 * @param p_char the character to check 1618 * @return true if the char is unreserved, false otherwise 1619 */ 1620 private static boolean isUnreservedCharacter(char p_char) 1621 { 1622 return (isAlphanum(p_char) || MARK_CHARACTERS.indexOf(p_char) != -1); 1623 } 1624 1625 /** 1626 * Determine whether a given string contains only URI characters (also 1627 * called "uric" in RFC 2396). uric consist of all reserved 1628 * characters, unreserved characters and escaped characters. 1629 * 1630 * 1631 * @param p_uric URI string 1632 * @return true if the string is comprised of uric, false otherwise 1633 */ 1634 private static boolean isURIString(String p_uric) 1635 { 1636 1637 if (p_uric == null) 1638 { 1639 return false; 1640 } 1641 1642 int end = p_uric.length(); 1643 char testChar = '\0'; 1644 1645 for (int i = 0; i < end; i++) 1646 { 1647 testChar = p_uric.charAt(i); 1648 1649 if (testChar == '%') 1650 { 1651 if (i + 2 >= end ||!isHex(p_uric.charAt(i + 1)) 1652 ||!isHex(p_uric.charAt(i + 2))) 1653 { 1654 return false; 1655 } 1656 else 1657 { 1658 i += 2; 1659 1660 continue; 1661 } 1662 } 1663 1664 if (isReservedCharacter(testChar) || isUnreservedCharacter(testChar)) 1665 { 1666 continue; 1667 } 1668 else 1669 { 1670 return false; 1671 } 1672 } 1673 1674 return true; 1675 } 1676 }