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Developer Documentation
- Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
- Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
- PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.
/lib/simplepie/library/SimplePie/ -> IRI.php (source)
Differences Between: [Versions 310 and 311] [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403] [Versions 39 and 311]
1 <?php 2 /** 3 * SimplePie 4 * 5 * A PHP-Based RSS and Atom Feed Framework. 6 * Takes the hard work out of managing a complete RSS/Atom solution. 7 * 8 * Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without modification, are 12 * permitted provided that the following conditions are met: 13 * 14 * * Redistributions of source code must retain the above copyright notice, this list of 15 * conditions and the following disclaimer. 16 * 17 * * Redistributions in binary form must reproduce the above copyright notice, this list 18 * of conditions and the following disclaimer in the documentation and/or other materials 19 * provided with the distribution. 20 * 21 * * Neither the name of the SimplePie Team nor the names of its contributors may be used 22 * to endorse or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS 26 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 27 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS 28 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 * 35 * @package SimplePie 36 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue 37 * @author Ryan Parman 38 * @author Sam Sneddon 39 * @author Ryan McCue 40 * @link http://simplepie.org/ SimplePie 41 * @license http://www.opensource.org/licenses/bsd-license.php BSD License 42 */ 43 44 /** 45 * IRI parser/serialiser/normaliser 46 * 47 * @package SimplePie 48 * @subpackage HTTP 49 * @author Sam Sneddon 50 * @author Steve Minutillo 51 * @author Ryan McCue 52 * @copyright 2007-2012 Sam Sneddon, Steve Minutillo, Ryan McCue 53 * @license http://www.opensource.org/licenses/bsd-license.php 54 */ 55 class SimplePie_IRI 56 { 57 /** 58 * Scheme 59 * 60 * @var string 61 */ 62 protected $scheme = null; 63 64 /** 65 * User Information 66 * 67 * @var string 68 */ 69 protected $iuserinfo = null; 70 71 /** 72 * ihost 73 * 74 * @var string 75 */ 76 protected $ihost = null; 77 78 /** 79 * Port 80 * 81 * @var string 82 */ 83 protected $port = null; 84 85 /** 86 * ipath 87 * 88 * @var string 89 */ 90 protected $ipath = ''; 91 92 /** 93 * iquery 94 * 95 * @var string 96 */ 97 protected $iquery = null; 98 99 /** 100 * ifragment 101 * 102 * @var string 103 */ 104 protected $ifragment = null; 105 106 /** 107 * Normalization database 108 * 109 * Each key is the scheme, each value is an array with each key as the IRI 110 * part and value as the default value for that part. 111 */ 112 protected $normalization = array( 113 'acap' => array( 114 'port' => 674 115 ), 116 'dict' => array( 117 'port' => 2628 118 ), 119 'file' => array( 120 'ihost' => 'localhost' 121 ), 122 'http' => array( 123 'port' => 80, 124 'ipath' => '/' 125 ), 126 'https' => array( 127 'port' => 443, 128 'ipath' => '/' 129 ), 130 ); 131 132 /** 133 * Return the entire IRI when you try and read the object as a string 134 * 135 * @return string 136 */ 137 public function __toString() 138 { 139 return $this->get_iri(); 140 } 141 142 /** 143 * Overload __set() to provide access via properties 144 * 145 * @param string $name Property name 146 * @param mixed $value Property value 147 */ 148 public function __set($name, $value) 149 { 150 if (method_exists($this, 'set_' . $name)) 151 { 152 call_user_func(array($this, 'set_' . $name), $value); 153 } 154 elseif ( 155 $name === 'iauthority' 156 || $name === 'iuserinfo' 157 || $name === 'ihost' 158 || $name === 'ipath' 159 || $name === 'iquery' 160 || $name === 'ifragment' 161 ) 162 { 163 call_user_func(array($this, 'set_' . substr($name, 1)), $value); 164 } 165 } 166 167 /** 168 * Overload __get() to provide access via properties 169 * 170 * @param string $name Property name 171 * @return mixed 172 */ 173 public function __get($name) 174 { 175 // isset() returns false for null, we don't want to do that 176 // Also why we use array_key_exists below instead of isset() 177 $props = get_object_vars($this); 178 179 if ( 180 $name === 'iri' || 181 $name === 'uri' || 182 $name === 'iauthority' || 183 $name === 'authority' 184 ) 185 { 186 $return = $this->{"get_$name"}(); 187 } 188 elseif (array_key_exists($name, $props)) 189 { 190 $return = $this->$name; 191 } 192 // host -> ihost 193 elseif (($prop = 'i' . $name) && array_key_exists($prop, $props)) 194 { 195 $name = $prop; 196 $return = $this->$prop; 197 } 198 // ischeme -> scheme 199 elseif (($prop = substr($name, 1)) && array_key_exists($prop, $props)) 200 { 201 $name = $prop; 202 $return = $this->$prop; 203 } 204 else 205 { 206 trigger_error('Undefined property: ' . get_class($this) . '::' . $name, E_USER_NOTICE); 207 $return = null; 208 } 209 210 if ($return === null && isset($this->normalization[$this->scheme][$name])) 211 { 212 return $this->normalization[$this->scheme][$name]; 213 } 214 215 return $return; 216 } 217 218 /** 219 * Overload __isset() to provide access via properties 220 * 221 * @param string $name Property name 222 * @return bool 223 */ 224 public function __isset($name) 225 { 226 return method_exists($this, 'get_' . $name) || isset($this->$name); 227 } 228 229 /** 230 * Overload __unset() to provide access via properties 231 * 232 * @param string $name Property name 233 */ 234 public function __unset($name) 235 { 236 if (method_exists($this, 'set_' . $name)) 237 { 238 call_user_func(array($this, 'set_' . $name), ''); 239 } 240 } 241 242 /** 243 * Create a new IRI object, from a specified string 244 * 245 * @param string $iri 246 */ 247 public function __construct($iri = null) 248 { 249 $this->set_iri($iri); 250 } 251 252 /** 253 * Clean up 254 */ 255 public function __destruct() { 256 $this->set_iri(null, true); 257 $this->set_path(null, true); 258 $this->set_authority(null, true); 259 } 260 261 /** 262 * Create a new IRI object by resolving a relative IRI 263 * 264 * Returns false if $base is not absolute, otherwise an IRI. 265 * 266 * @param IRI|string $base (Absolute) Base IRI 267 * @param IRI|string $relative Relative IRI 268 * @return IRI|false 269 */ 270 public static function absolutize($base, $relative) 271 { 272 if (!($relative instanceof SimplePie_IRI)) 273 { 274 $relative = new SimplePie_IRI($relative); 275 } 276 if (!$relative->is_valid()) 277 { 278 return false; 279 } 280 elseif ($relative->scheme !== null) 281 { 282 return clone $relative; 283 } 284 else 285 { 286 if (!($base instanceof SimplePie_IRI)) 287 { 288 $base = new SimplePie_IRI($base); 289 } 290 if ($base->scheme !== null && $base->is_valid()) 291 { 292 if ($relative->get_iri() !== '') 293 { 294 if ($relative->iuserinfo !== null || $relative->ihost !== null || $relative->port !== null) 295 { 296 $target = clone $relative; 297 $target->scheme = $base->scheme; 298 } 299 else 300 { 301 $target = new SimplePie_IRI; 302 $target->scheme = $base->scheme; 303 $target->iuserinfo = $base->iuserinfo; 304 $target->ihost = $base->ihost; 305 $target->port = $base->port; 306 if ($relative->ipath !== '') 307 { 308 if ($relative->ipath[0] === '/') 309 { 310 $target->ipath = $relative->ipath; 311 } 312 elseif (($base->iuserinfo !== null || $base->ihost !== null || $base->port !== null) && $base->ipath === '') 313 { 314 $target->ipath = '/' . $relative->ipath; 315 } 316 elseif (($last_segment = strrpos($base->ipath, '/')) !== false) 317 { 318 $target->ipath = substr($base->ipath, 0, $last_segment + 1) . $relative->ipath; 319 } 320 else 321 { 322 $target->ipath = $relative->ipath; 323 } 324 $target->ipath = $target->remove_dot_segments($target->ipath); 325 $target->iquery = $relative->iquery; 326 } 327 else 328 { 329 $target->ipath = $base->ipath; 330 if ($relative->iquery !== null) 331 { 332 $target->iquery = $relative->iquery; 333 } 334 elseif ($base->iquery !== null) 335 { 336 $target->iquery = $base->iquery; 337 } 338 } 339 $target->ifragment = $relative->ifragment; 340 } 341 } 342 else 343 { 344 $target = clone $base; 345 $target->ifragment = null; 346 } 347 $target->scheme_normalization(); 348 return $target; 349 } 350 351 return false; 352 } 353 } 354 355 /** 356 * Parse an IRI into scheme/authority/path/query/fragment segments 357 * 358 * @param string $iri 359 * @return array 360 */ 361 protected function parse_iri($iri) 362 { 363 $iri = trim($iri, "\x20\x09\x0A\x0C\x0D"); 364 if (preg_match('/^((?P<scheme>[^:\/?#]+):)?(\/\/(?P<authority>[^\/?#]*))?(?P<path>[^?#]*)(\?(?P<query>[^#]*))?(#(?P<fragment>.*))?$/', $iri, $match)) 365 { 366 if ($match[1] === '') 367 { 368 $match['scheme'] = null; 369 } 370 if (!isset($match[3]) || $match[3] === '') 371 { 372 $match['authority'] = null; 373 } 374 if (!isset($match[5])) 375 { 376 $match['path'] = ''; 377 } 378 if (!isset($match[6]) || $match[6] === '') 379 { 380 $match['query'] = null; 381 } 382 if (!isset($match[8]) || $match[8] === '') 383 { 384 $match['fragment'] = null; 385 } 386 return $match; 387 } 388 389 // This can occur when a paragraph is accidentally parsed as a URI 390 return false; 391 } 392 393 /** 394 * Remove dot segments from a path 395 * 396 * @param string $input 397 * @return string 398 */ 399 protected function remove_dot_segments($input) 400 { 401 $output = ''; 402 while (strpos($input, './') !== false || strpos($input, '/.') !== false || $input === '.' || $input === '..') 403 { 404 // A: If the input buffer begins with a prefix of "../" or "./", then remove that prefix from the input buffer; otherwise, 405 if (strpos($input, '../') === 0) 406 { 407 $input = substr($input, 3); 408 } 409 elseif (strpos($input, './') === 0) 410 { 411 $input = substr($input, 2); 412 } 413 // B: if the input buffer begins with a prefix of "/./" or "/.", where "." is a complete path segment, then replace that prefix with "/" in the input buffer; otherwise, 414 elseif (strpos($input, '/./') === 0) 415 { 416 $input = substr($input, 2); 417 } 418 elseif ($input === '/.') 419 { 420 $input = '/'; 421 } 422 // C: if the input buffer begins with a prefix of "/../" or "/..", where ".." is a complete path segment, then replace that prefix with "/" in the input buffer and remove the last segment and its preceding "/" (if any) from the output buffer; otherwise, 423 elseif (strpos($input, '/../') === 0) 424 { 425 $input = substr($input, 3); 426 $output = substr_replace($output, '', strrpos($output, '/')); 427 } 428 elseif ($input === '/..') 429 { 430 $input = '/'; 431 $output = substr_replace($output, '', strrpos($output, '/')); 432 } 433 // D: if the input buffer consists only of "." or "..", then remove that from the input buffer; otherwise, 434 elseif ($input === '.' || $input === '..') 435 { 436 $input = ''; 437 } 438 // E: move the first path segment in the input buffer to the end of the output buffer, including the initial "/" character (if any) and any subsequent characters up to, but not including, the next "/" character or the end of the input buffer 439 elseif (($pos = strpos($input, '/', 1)) !== false) 440 { 441 $output .= substr($input, 0, $pos); 442 $input = substr_replace($input, '', 0, $pos); 443 } 444 else 445 { 446 $output .= $input; 447 $input = ''; 448 } 449 } 450 return $output . $input; 451 } 452 453 /** 454 * Replace invalid character with percent encoding 455 * 456 * @param string $string Input string 457 * @param string $extra_chars Valid characters not in iunreserved or 458 * iprivate (this is ASCII-only) 459 * @param bool $iprivate Allow iprivate 460 * @return string 461 */ 462 protected function replace_invalid_with_pct_encoding($string, $extra_chars, $iprivate = false) 463 { 464 // Normalize as many pct-encoded sections as possible 465 $string = preg_replace_callback('/(?:%[A-Fa-f0-9]{2})+/', array($this, 'remove_iunreserved_percent_encoded'), $string); 466 467 // Replace invalid percent characters 468 $string = preg_replace('/%(?![A-Fa-f0-9]{2})/', '%25', $string); 469 470 // Add unreserved and % to $extra_chars (the latter is safe because all 471 // pct-encoded sections are now valid). 472 $extra_chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~%'; 473 474 // Now replace any bytes that aren't allowed with their pct-encoded versions 475 $position = 0; 476 $strlen = strlen($string); 477 while (($position += strspn($string, $extra_chars, $position)) < $strlen) 478 { 479 $value = ord($string[$position]); 480 481 // Start position 482 $start = $position; 483 484 // By default we are valid 485 $valid = true; 486 487 // No one byte sequences are valid due to the while. 488 // Two byte sequence: 489 if (($value & 0xE0) === 0xC0) 490 { 491 $character = ($value & 0x1F) << 6; 492 $length = 2; 493 $remaining = 1; 494 } 495 // Three byte sequence: 496 elseif (($value & 0xF0) === 0xE0) 497 { 498 $character = ($value & 0x0F) << 12; 499 $length = 3; 500 $remaining = 2; 501 } 502 // Four byte sequence: 503 elseif (($value & 0xF8) === 0xF0) 504 { 505 $character = ($value & 0x07) << 18; 506 $length = 4; 507 $remaining = 3; 508 } 509 // Invalid byte: 510 else 511 { 512 $valid = false; 513 $length = 1; 514 $remaining = 0; 515 } 516 517 if ($remaining) 518 { 519 if ($position + $length <= $strlen) 520 { 521 for ($position++; $remaining; $position++) 522 { 523 $value = ord($string[$position]); 524 525 // Check that the byte is valid, then add it to the character: 526 if (($value & 0xC0) === 0x80) 527 { 528 $character |= ($value & 0x3F) << (--$remaining * 6); 529 } 530 // If it is invalid, count the sequence as invalid and reprocess the current byte: 531 else 532 { 533 $valid = false; 534 $position--; 535 break; 536 } 537 } 538 } 539 else 540 { 541 $position = $strlen - 1; 542 $valid = false; 543 } 544 } 545 546 // Percent encode anything invalid or not in ucschar 547 if ( 548 // Invalid sequences 549 !$valid 550 // Non-shortest form sequences are invalid 551 || $length > 1 && $character <= 0x7F 552 || $length > 2 && $character <= 0x7FF 553 || $length > 3 && $character <= 0xFFFF 554 // Outside of range of ucschar codepoints 555 // Noncharacters 556 || ($character & 0xFFFE) === 0xFFFE 557 || $character >= 0xFDD0 && $character <= 0xFDEF 558 || ( 559 // Everything else not in ucschar 560 $character > 0xD7FF && $character < 0xF900 561 || $character < 0xA0 562 || $character > 0xEFFFD 563 ) 564 && ( 565 // Everything not in iprivate, if it applies 566 !$iprivate 567 || $character < 0xE000 568 || $character > 0x10FFFD 569 ) 570 ) 571 { 572 // If we were a character, pretend we weren't, but rather an error. 573 if ($valid) 574 $position--; 575 576 for ($j = $start; $j <= $position; $j++) 577 { 578 $string = substr_replace($string, sprintf('%%%02X', ord($string[$j])), $j, 1); 579 $j += 2; 580 $position += 2; 581 $strlen += 2; 582 } 583 } 584 } 585 586 return $string; 587 } 588 589 /** 590 * Callback function for preg_replace_callback. 591 * 592 * Removes sequences of percent encoded bytes that represent UTF-8 593 * encoded characters in iunreserved 594 * 595 * @param array $match PCRE match 596 * @return string Replacement 597 */ 598 protected function remove_iunreserved_percent_encoded($match) 599 { 600 // As we just have valid percent encoded sequences we can just explode 601 // and ignore the first member of the returned array (an empty string). 602 $bytes = explode('%', $match[0]); 603 604 // Initialize the new string (this is what will be returned) and that 605 // there are no bytes remaining in the current sequence (unsurprising 606 // at the first byte!). 607 $string = ''; 608 $remaining = 0; 609 610 // Loop over each and every byte, and set $value to its value 611 for ($i = 1, $len = count($bytes); $i < $len; $i++) 612 { 613 $value = hexdec($bytes[$i]); 614 615 // If we're the first byte of sequence: 616 if (!$remaining) 617 { 618 // Start position 619 $start = $i; 620 621 // By default we are valid 622 $valid = true; 623 624 // One byte sequence: 625 if ($value <= 0x7F) 626 { 627 $character = $value; 628 $length = 1; 629 } 630 // Two byte sequence: 631 elseif (($value & 0xE0) === 0xC0) 632 { 633 $character = ($value & 0x1F) << 6; 634 $length = 2; 635 $remaining = 1; 636 } 637 // Three byte sequence: 638 elseif (($value & 0xF0) === 0xE0) 639 { 640 $character = ($value & 0x0F) << 12; 641 $length = 3; 642 $remaining = 2; 643 } 644 // Four byte sequence: 645 elseif (($value & 0xF8) === 0xF0) 646 { 647 $character = ($value & 0x07) << 18; 648 $length = 4; 649 $remaining = 3; 650 } 651 // Invalid byte: 652 else 653 { 654 $valid = false; 655 $remaining = 0; 656 } 657 } 658 // Continuation byte: 659 else 660 { 661 // Check that the byte is valid, then add it to the character: 662 if (($value & 0xC0) === 0x80) 663 { 664 $remaining--; 665 $character |= ($value & 0x3F) << ($remaining * 6); 666 } 667 // If it is invalid, count the sequence as invalid and reprocess the current byte as the start of a sequence: 668 else 669 { 670 $valid = false; 671 $remaining = 0; 672 $i--; 673 } 674 } 675 676 // If we've reached the end of the current byte sequence, append it to Unicode::$data 677 if (!$remaining) 678 { 679 // Percent encode anything invalid or not in iunreserved 680 if ( 681 // Invalid sequences 682 !$valid 683 // Non-shortest form sequences are invalid 684 || $length > 1 && $character <= 0x7F 685 || $length > 2 && $character <= 0x7FF 686 || $length > 3 && $character <= 0xFFFF 687 // Outside of range of iunreserved codepoints 688 || $character < 0x2D 689 || $character > 0xEFFFD 690 // Noncharacters 691 || ($character & 0xFFFE) === 0xFFFE 692 || $character >= 0xFDD0 && $character <= 0xFDEF 693 // Everything else not in iunreserved (this is all BMP) 694 || $character === 0x2F 695 || $character > 0x39 && $character < 0x41 696 || $character > 0x5A && $character < 0x61 697 || $character > 0x7A && $character < 0x7E 698 || $character > 0x7E && $character < 0xA0 699 || $character > 0xD7FF && $character < 0xF900 700 ) 701 { 702 for ($j = $start; $j <= $i; $j++) 703 { 704 $string .= '%' . strtoupper($bytes[$j]); 705 } 706 } 707 else 708 { 709 for ($j = $start; $j <= $i; $j++) 710 { 711 $string .= chr(hexdec($bytes[$j])); 712 } 713 } 714 } 715 } 716 717 // If we have any bytes left over they are invalid (i.e., we are 718 // mid-way through a multi-byte sequence) 719 if ($remaining) 720 { 721 for ($j = $start; $j < $len; $j++) 722 { 723 $string .= '%' . strtoupper($bytes[$j]); 724 } 725 } 726 727 return $string; 728 } 729 730 protected function scheme_normalization() 731 { 732 if (isset($this->normalization[$this->scheme]['iuserinfo']) && $this->iuserinfo === $this->normalization[$this->scheme]['iuserinfo']) 733 { 734 $this->iuserinfo = null; 735 } 736 if (isset($this->normalization[$this->scheme]['ihost']) && $this->ihost === $this->normalization[$this->scheme]['ihost']) 737 { 738 $this->ihost = null; 739 } 740 if (isset($this->normalization[$this->scheme]['port']) && $this->port === $this->normalization[$this->scheme]['port']) 741 { 742 $this->port = null; 743 } 744 if (isset($this->normalization[$this->scheme]['ipath']) && $this->ipath === $this->normalization[$this->scheme]['ipath']) 745 { 746 $this->ipath = ''; 747 } 748 if (isset($this->normalization[$this->scheme]['iquery']) && $this->iquery === $this->normalization[$this->scheme]['iquery']) 749 { 750 $this->iquery = null; 751 } 752 if (isset($this->normalization[$this->scheme]['ifragment']) && $this->ifragment === $this->normalization[$this->scheme]['ifragment']) 753 { 754 $this->ifragment = null; 755 } 756 } 757 758 /** 759 * Check if the object represents a valid IRI. This needs to be done on each 760 * call as some things change depending on another part of the IRI. 761 * 762 * @return bool 763 */ 764 public function is_valid() 765 { 766 if ($this->ipath === '') return true; 767 768 $isauthority = $this->iuserinfo !== null || $this->ihost !== null || 769 $this->port !== null; 770 if ($isauthority && $this->ipath[0] === '/') return true; 771 772 if (!$isauthority && (substr($this->ipath, 0, 2) === '//')) return false; 773 774 // Relative urls cannot have a colon in the first path segment (and the 775 // slashes themselves are not included so skip the first character). 776 if (!$this->scheme && !$isauthority && 777 strpos($this->ipath, ':') !== false && 778 strpos($this->ipath, '/', 1) !== false && 779 strpos($this->ipath, ':') < strpos($this->ipath, '/', 1)) return false; 780 781 return true; 782 } 783 784 /** 785 * Set the entire IRI. Returns true on success, false on failure (if there 786 * are any invalid characters). 787 * 788 * @param string $iri 789 * @return bool 790 */ 791 public function set_iri($iri, $clear_cache = false) 792 { 793 static $cache; 794 if ($clear_cache) 795 { 796 $cache = null; 797 return; 798 } 799 if (!$cache) 800 { 801 $cache = array(); 802 } 803 804 if ($iri === null) 805 { 806 return true; 807 } 808 elseif (isset($cache[$iri])) 809 { 810 list($this->scheme, 811 $this->iuserinfo, 812 $this->ihost, 813 $this->port, 814 $this->ipath, 815 $this->iquery, 816 $this->ifragment, 817 $return) = $cache[$iri]; 818 return $return; 819 } 820 821 $parsed = $this->parse_iri((string) $iri); 822 if (!$parsed) 823 { 824 return false; 825 } 826 827 $return = $this->set_scheme($parsed['scheme']) 828 && $this->set_authority($parsed['authority']) 829 && $this->set_path($parsed['path']) 830 && $this->set_query($parsed['query']) 831 && $this->set_fragment($parsed['fragment']); 832 833 $cache[$iri] = array($this->scheme, 834 $this->iuserinfo, 835 $this->ihost, 836 $this->port, 837 $this->ipath, 838 $this->iquery, 839 $this->ifragment, 840 $return); 841 return $return; 842 } 843 844 /** 845 * Set the scheme. Returns true on success, false on failure (if there are 846 * any invalid characters). 847 * 848 * @param string $scheme 849 * @return bool 850 */ 851 public function set_scheme($scheme) 852 { 853 if ($scheme === null) 854 { 855 $this->scheme = null; 856 } 857 elseif (!preg_match('/^[A-Za-z][0-9A-Za-z+\-.]*$/', $scheme)) 858 { 859 $this->scheme = null; 860 return false; 861 } 862 else 863 { 864 $this->scheme = strtolower($scheme); 865 } 866 return true; 867 } 868 869 /** 870 * Set the authority. Returns true on success, false on failure (if there are 871 * any invalid characters). 872 * 873 * @param string $authority 874 * @return bool 875 */ 876 public function set_authority($authority, $clear_cache = false) 877 { 878 static $cache; 879 if ($clear_cache) 880 { 881 $cache = null; 882 return; 883 } 884 if (!$cache) 885 $cache = array(); 886 887 if ($authority === null) 888 { 889 $this->iuserinfo = null; 890 $this->ihost = null; 891 $this->port = null; 892 return true; 893 } 894 elseif (isset($cache[$authority])) 895 { 896 list($this->iuserinfo, 897 $this->ihost, 898 $this->port, 899 $return) = $cache[$authority]; 900 901 return $return; 902 } 903 904 $remaining = $authority; 905 if (($iuserinfo_end = strrpos($remaining, '@')) !== false) 906 { 907 $iuserinfo = substr($remaining, 0, $iuserinfo_end); 908 $remaining = substr($remaining, $iuserinfo_end + 1); 909 } 910 else 911 { 912 $iuserinfo = null; 913 } 914 if (($port_start = strpos($remaining, ':', strpos($remaining, ']'))) !== false) 915 { 916 if (($port = substr($remaining, $port_start + 1)) === false) 917 { 918 $port = null; 919 } 920 $remaining = substr($remaining, 0, $port_start); 921 } 922 else 923 { 924 $port = null; 925 } 926 927 $return = $this->set_userinfo($iuserinfo) && 928 $this->set_host($remaining) && 929 $this->set_port($port); 930 931 $cache[$authority] = array($this->iuserinfo, 932 $this->ihost, 933 $this->port, 934 $return); 935 936 return $return; 937 } 938 939 /** 940 * Set the iuserinfo. 941 * 942 * @param string $iuserinfo 943 * @return bool 944 */ 945 public function set_userinfo($iuserinfo) 946 { 947 if ($iuserinfo === null) 948 { 949 $this->iuserinfo = null; 950 } 951 else 952 { 953 $this->iuserinfo = $this->replace_invalid_with_pct_encoding($iuserinfo, '!$&\'()*+,;=:'); 954 $this->scheme_normalization(); 955 } 956 957 return true; 958 } 959 960 /** 961 * Set the ihost. Returns true on success, false on failure (if there are 962 * any invalid characters). 963 * 964 * @param string $ihost 965 * @return bool 966 */ 967 public function set_host($ihost) 968 { 969 if ($ihost === null) 970 { 971 $this->ihost = null; 972 return true; 973 } 974 elseif (substr($ihost, 0, 1) === '[' && substr($ihost, -1) === ']') 975 { 976 if (SimplePie_Net_IPv6::check_ipv6(substr($ihost, 1, -1))) 977 { 978 $this->ihost = '[' . SimplePie_Net_IPv6::compress(substr($ihost, 1, -1)) . ']'; 979 } 980 else 981 { 982 $this->ihost = null; 983 return false; 984 } 985 } 986 else 987 { 988 $ihost = $this->replace_invalid_with_pct_encoding($ihost, '!$&\'()*+,;='); 989 990 // Lowercase, but ignore pct-encoded sections (as they should 991 // remain uppercase). This must be done after the previous step 992 // as that can add unescaped characters. 993 $position = 0; 994 $strlen = strlen($ihost); 995 while (($position += strcspn($ihost, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ%', $position)) < $strlen) 996 { 997 if ($ihost[$position] === '%') 998 { 999 $position += 3; 1000 } 1001 else 1002 { 1003 $ihost[$position] = strtolower($ihost[$position]); 1004 $position++; 1005 } 1006 } 1007 1008 $this->ihost = $ihost; 1009 } 1010 1011 $this->scheme_normalization(); 1012 1013 return true; 1014 } 1015 1016 /** 1017 * Set the port. Returns true on success, false on failure (if there are 1018 * any invalid characters). 1019 * 1020 * @param string $port 1021 * @return bool 1022 */ 1023 public function set_port($port) 1024 { 1025 if ($port === null) 1026 { 1027 $this->port = null; 1028 return true; 1029 } 1030 elseif (strspn($port, '0123456789') === strlen($port)) 1031 { 1032 $this->port = (int) $port; 1033 $this->scheme_normalization(); 1034 return true; 1035 } 1036 1037 $this->port = null; 1038 return false; 1039 } 1040 1041 /** 1042 * Set the ipath. 1043 * 1044 * @param string $ipath 1045 * @return bool 1046 */ 1047 public function set_path($ipath, $clear_cache = false) 1048 { 1049 static $cache; 1050 if ($clear_cache) 1051 { 1052 $cache = null; 1053 return; 1054 } 1055 if (!$cache) 1056 { 1057 $cache = array(); 1058 } 1059 1060 $ipath = (string) $ipath; 1061 1062 if (isset($cache[$ipath])) 1063 { 1064 $this->ipath = $cache[$ipath][(int) ($this->scheme !== null)]; 1065 } 1066 else 1067 { 1068 $valid = $this->replace_invalid_with_pct_encoding($ipath, '!$&\'()*+,;=@:/'); 1069 $removed = $this->remove_dot_segments($valid); 1070 1071 $cache[$ipath] = array($valid, $removed); 1072 $this->ipath = ($this->scheme !== null) ? $removed : $valid; 1073 } 1074 1075 $this->scheme_normalization(); 1076 return true; 1077 } 1078 1079 /** 1080 * Set the iquery. 1081 * 1082 * @param string $iquery 1083 * @return bool 1084 */ 1085 public function set_query($iquery) 1086 { 1087 if ($iquery === null) 1088 { 1089 $this->iquery = null; 1090 } 1091 else 1092 { 1093 $this->iquery = $this->replace_invalid_with_pct_encoding($iquery, '!$&\'()*+,;=:@/?', true); 1094 $this->scheme_normalization(); 1095 } 1096 return true; 1097 } 1098 1099 /** 1100 * Set the ifragment. 1101 * 1102 * @param string $ifragment 1103 * @return bool 1104 */ 1105 public function set_fragment($ifragment) 1106 { 1107 if ($ifragment === null) 1108 { 1109 $this->ifragment = null; 1110 } 1111 else 1112 { 1113 $this->ifragment = $this->replace_invalid_with_pct_encoding($ifragment, '!$&\'()*+,;=:@/?'); 1114 $this->scheme_normalization(); 1115 } 1116 return true; 1117 } 1118 1119 /** 1120 * Convert an IRI to a URI (or parts thereof) 1121 * 1122 * @return string 1123 */ 1124 public function to_uri($string) 1125 { 1126 static $non_ascii; 1127 if (!$non_ascii) 1128 { 1129 $non_ascii = implode('', range("\x80", "\xFF")); 1130 } 1131 1132 $position = 0; 1133 $strlen = strlen($string); 1134 while (($position += strcspn($string, $non_ascii, $position)) < $strlen) 1135 { 1136 $string = substr_replace($string, sprintf('%%%02X', ord($string[$position])), $position, 1); 1137 $position += 3; 1138 $strlen += 2; 1139 } 1140 1141 return $string; 1142 } 1143 1144 /** 1145 * Get the complete IRI 1146 * 1147 * @return string 1148 */ 1149 public function get_iri() 1150 { 1151 if (!$this->is_valid()) 1152 { 1153 return false; 1154 } 1155 1156 $iri = ''; 1157 if ($this->scheme !== null) 1158 { 1159 $iri .= $this->scheme . ':'; 1160 } 1161 if (($iauthority = $this->get_iauthority()) !== null) 1162 { 1163 $iri .= '//' . $iauthority; 1164 } 1165 if ($this->ipath !== '') 1166 { 1167 $iri .= $this->ipath; 1168 } 1169 elseif (!empty($this->normalization[$this->scheme]['ipath']) && $iauthority !== null && $iauthority !== '') 1170 { 1171 $iri .= $this->normalization[$this->scheme]['ipath']; 1172 } 1173 if ($this->iquery !== null) 1174 { 1175 $iri .= '?' . $this->iquery; 1176 } 1177 if ($this->ifragment !== null) 1178 { 1179 $iri .= '#' . $this->ifragment; 1180 } 1181 1182 return $iri; 1183 } 1184 1185 /** 1186 * Get the complete URI 1187 * 1188 * @return string 1189 */ 1190 public function get_uri() 1191 { 1192 return $this->to_uri($this->get_iri()); 1193 } 1194 1195 /** 1196 * Get the complete iauthority 1197 * 1198 * @return string 1199 */ 1200 protected function get_iauthority() 1201 { 1202 if ($this->iuserinfo !== null || $this->ihost !== null || $this->port !== null) 1203 { 1204 $iauthority = ''; 1205 if ($this->iuserinfo !== null) 1206 { 1207 $iauthority .= $this->iuserinfo . '@'; 1208 } 1209 if ($this->ihost !== null) 1210 { 1211 $iauthority .= $this->ihost; 1212 } 1213 if ($this->port !== null && $this->port !== 0) 1214 { 1215 $iauthority .= ':' . $this->port; 1216 } 1217 return $iauthority; 1218 } 1219 1220 return null; 1221 } 1222 1223 /** 1224 * Get the complete authority 1225 * 1226 * @return string 1227 */ 1228 protected function get_authority() 1229 { 1230 $iauthority = $this->get_iauthority(); 1231 if (is_string($iauthority)) 1232 return $this->to_uri($iauthority); 1233 1234 return $iauthority; 1235 } 1236 }
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