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1 <?php 2 if ( !class_exists( 'Services_JSON' ) ) : 3 /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ 4 /** 5 * Converts to and from JSON format. 6 * 7 * JSON (JavaScript Object Notation) is a lightweight data-interchange 8 * format. It is easy for humans to read and write. It is easy for machines 9 * to parse and generate. It is based on a subset of the JavaScript 10 * Programming Language, Standard ECMA-262 3rd Edition - December 1999. 11 * This feature can also be found in Python. JSON is a text format that is 12 * completely language independent but uses conventions that are familiar 13 * to programmers of the C-family of languages, including C, C++, C#, Java, 14 * JavaScript, Perl, TCL, and many others. These properties make JSON an 15 * ideal data-interchange language. 16 * 17 * This package provides a simple encoder and decoder for JSON notation. It 18 * is intended for use with client-side Javascript applications that make 19 * use of HTTPRequest to perform server communication functions - data can 20 * be encoded into JSON notation for use in a client-side javascript, or 21 * decoded from incoming Javascript requests. JSON format is native to 22 * Javascript, and can be directly eval()'ed with no further parsing 23 * overhead 24 * 25 * All strings should be in ASCII or UTF-8 format! 26 * 27 * LICENSE: Redistribution and use in source and binary forms, with or 28 * without modification, are permitted provided that the following 29 * conditions are met: Redistributions of source code must retain the 30 * above copyright notice, this list of conditions and the following 31 * disclaimer. Redistributions in binary form must reproduce the above 32 * copyright notice, this list of conditions and the following disclaimer 33 * in the documentation and/or other materials provided with the 34 * distribution. 35 * 36 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 37 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 38 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 39 * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 40 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 41 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 42 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 44 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 45 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 46 * DAMAGE. 47 * 48 * @category 49 * @package Services_JSON 50 * @author Michal Migurski <mike-json@teczno.com> 51 * @author Matt Knapp <mdknapp[at]gmail[dot]com> 52 * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> 53 * @copyright 2005 Michal Migurski 54 * @version CVS: $Id: JSON.php 288200 2009-09-09 15:41:29Z alan_k $ 55 * @license http://www.opensource.org/licenses/bsd-license.php 56 * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 57 */ 58 59 /** 60 * Marker constant for Services_JSON::decode(), used to flag stack state 61 */ 62 define('SERVICES_JSON_SLICE', 1); 63 64 /** 65 * Marker constant for Services_JSON::decode(), used to flag stack state 66 */ 67 define('SERVICES_JSON_IN_STR', 2); 68 69 /** 70 * Marker constant for Services_JSON::decode(), used to flag stack state 71 */ 72 define('SERVICES_JSON_IN_ARR', 3); 73 74 /** 75 * Marker constant for Services_JSON::decode(), used to flag stack state 76 */ 77 define('SERVICES_JSON_IN_OBJ', 4); 78 79 /** 80 * Marker constant for Services_JSON::decode(), used to flag stack state 81 */ 82 define('SERVICES_JSON_IN_CMT', 5); 83 84 /** 85 * Behavior switch for Services_JSON::decode() 86 */ 87 define('SERVICES_JSON_LOOSE_TYPE', 16); 88 89 /** 90 * Behavior switch for Services_JSON::decode() 91 */ 92 define('SERVICES_JSON_SUPPRESS_ERRORS', 32); 93 94 /** 95 * Converts to and from JSON format. 96 * 97 * Brief example of use: 98 * 99 * <code> 100 * // create a new instance of Services_JSON 101 * $json = new Services_JSON(); 102 * 103 * // convert a complexe value to JSON notation, and send it to the browser 104 * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4))); 105 * $output = $json->encode($value); 106 * 107 * print($output); 108 * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]] 109 * 110 * // accept incoming POST data, assumed to be in JSON notation 111 * $input = file_get_contents('php://input', 1000000); 112 * $value = $json->decode($input); 113 * </code> 114 */ 115 class Services_JSON 116 { 117 /** 118 * constructs a new JSON instance 119 * 120 * @param int $use object behavior flags; combine with boolean-OR 121 * 122 * possible values: 123 * - SERVICES_JSON_LOOSE_TYPE: loose typing. 124 * "{...}" syntax creates associative arrays 125 * instead of objects in decode(). 126 * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. 127 * Values which can't be encoded (e.g. resources) 128 * appear as NULL instead of throwing errors. 129 * By default, a deeply-nested resource will 130 * bubble up with an error, so all return values 131 * from encode() should be checked with isError() 132 */ 133 function Services_JSON($use = 0) 134 { 135 $this->use = $use; 136 } 137 138 /** 139 * convert a string from one UTF-16 char to one UTF-8 char 140 * 141 * Normally should be handled by mb_convert_encoding, but 142 * provides a slower PHP-only method for installations 143 * that lack the multibye string extension. 144 * 145 * @param string $utf16 UTF-16 character 146 * @return string UTF-8 character 147 * @access private 148 */ 149 function utf162utf8($utf16) 150 { 151 // oh please oh please oh please oh please oh please 152 if(function_exists('mb_convert_encoding')) { 153 return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); 154 } 155 156 $bytes = (ord($utf16[0]) << 8) | ord($utf16[1]); 157 158 switch(true) { 159 case ((0x7F & $bytes) == $bytes): 160 // this case should never be reached, because we are in ASCII range 161 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 162 return chr(0x7F & $bytes); 163 164 case (0x07FF & $bytes) == $bytes: 165 // return a 2-byte UTF-8 character 166 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 167 return chr(0xC0 | (($bytes >> 6) & 0x1F)) 168 . chr(0x80 | ($bytes & 0x3F)); 169 170 case (0xFFFF & $bytes) == $bytes: 171 // return a 3-byte UTF-8 character 172 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 173 return chr(0xE0 | (($bytes >> 12) & 0x0F)) 174 . chr(0x80 | (($bytes >> 6) & 0x3F)) 175 . chr(0x80 | ($bytes & 0x3F)); 176 } 177 178 // ignoring UTF-32 for now, sorry 179 return ''; 180 } 181 182 /** 183 * convert a string from one UTF-8 char to one UTF-16 char 184 * 185 * Normally should be handled by mb_convert_encoding, but 186 * provides a slower PHP-only method for installations 187 * that lack the multibye string extension. 188 * 189 * @param string $utf8 UTF-8 character 190 * @return string UTF-16 character 191 * @access private 192 */ 193 function utf82utf16($utf8) 194 { 195 // oh please oh please oh please oh please oh please 196 if(function_exists('mb_convert_encoding')) { 197 return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); 198 } 199 200 switch(strlen($utf8)) { 201 case 1: 202 // this case should never be reached, because we are in ASCII range 203 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 204 return $utf8; 205 206 case 2: 207 // return a UTF-16 character from a 2-byte UTF-8 char 208 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 209 return chr(0x07 & (ord($utf8[0]) >> 2)) 210 . chr((0xC0 & (ord($utf8[0]) << 6)) 211 | (0x3F & ord($utf8[1]))); 212 213 case 3: 214 // return a UTF-16 character from a 3-byte UTF-8 char 215 // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 216 return chr((0xF0 & (ord($utf8[0]) << 4)) 217 | (0x0F & (ord($utf8[1]) >> 2))) 218 . chr((0xC0 & (ord($utf8[1]) << 6)) 219 | (0x7F & ord($utf8[2]))); 220 } 221 222 // ignoring UTF-32 for now, sorry 223 return ''; 224 } 225 226 /** 227 * encodes an arbitrary variable into JSON format (and sends JSON Header) 228 * 229 * @param mixed $var any number, boolean, string, array, or object to be encoded. 230 * see argument 1 to Services_JSON() above for array-parsing behavior. 231 * if var is a strng, note that encode() always expects it 232 * to be in ASCII or UTF-8 format! 233 * 234 * @return mixed JSON string representation of input var or an error if a problem occurs 235 * @access public 236 */ 237 function encode($var) 238 { 239 header('Content-type: application/json'); 240 return $this->_encode($var); 241 } 242 /** 243 * encodes an arbitrary variable into JSON format without JSON Header - warning - may allow CSS!!!!) 244 * 245 * @param mixed $var any number, boolean, string, array, or object to be encoded. 246 * see argument 1 to Services_JSON() above for array-parsing behavior. 247 * if var is a strng, note that encode() always expects it 248 * to be in ASCII or UTF-8 format! 249 * 250 * @return mixed JSON string representation of input var or an error if a problem occurs 251 * @access public 252 */ 253 function encodeUnsafe($var) 254 { 255 return $this->_encode($var); 256 } 257 /** 258 * PRIVATE CODE that does the work of encodes an arbitrary variable into JSON format 259 * 260 * @param mixed $var any number, boolean, string, array, or object to be encoded. 261 * see argument 1 to Services_JSON() above for array-parsing behavior. 262 * if var is a strng, note that encode() always expects it 263 * to be in ASCII or UTF-8 format! 264 * 265 * @return mixed JSON string representation of input var or an error if a problem occurs 266 * @access public 267 */ 268 function _encode($var) 269 { 270 271 switch (gettype($var)) { 272 case 'boolean': 273 return $var ? 'true' : 'false'; 274 275 case 'NULL': 276 return 'null'; 277 278 case 'integer': 279 return (int) $var; 280 281 case 'double': 282 case 'float': 283 return (float) $var; 284 285 case 'string': 286 // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT 287 $ascii = ''; 288 $strlen_var = strlen($var); 289 290 /* 291 * Iterate over every character in the string, 292 * escaping with a slash or encoding to UTF-8 where necessary 293 */ 294 for ($c = 0; $c < $strlen_var; ++$c) { 295 296 $ord_var_c = ord($var[$c]); 297 298 switch (true) { 299 case $ord_var_c == 0x08: 300 $ascii .= '\b'; 301 break; 302 case $ord_var_c == 0x09: 303 $ascii .= '\t'; 304 break; 305 case $ord_var_c == 0x0A: 306 $ascii .= '\n'; 307 break; 308 case $ord_var_c == 0x0C: 309 $ascii .= '\f'; 310 break; 311 case $ord_var_c == 0x0D: 312 $ascii .= '\r'; 313 break; 314 315 case $ord_var_c == 0x22: 316 case $ord_var_c == 0x2F: 317 case $ord_var_c == 0x5C: 318 // double quote, slash, slosh 319 $ascii .= '\\'.$var[$c]; 320 break; 321 322 case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): 323 // characters U-00000000 - U-0000007F (same as ASCII) 324 $ascii .= $var[$c]; 325 break; 326 327 case (($ord_var_c & 0xE0) == 0xC0): 328 // characters U-00000080 - U-000007FF, mask 110XXXXX 329 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 330 if ($c+1 >= $strlen_var) { 331 $c += 1; 332 $ascii .= '?'; 333 break; 334 } 335 336 $char = pack('C*', $ord_var_c, ord($var[$c + 1])); 337 $c += 1; 338 $utf16 = $this->utf82utf16($char); 339 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 340 break; 341 342 case (($ord_var_c & 0xF0) == 0xE0): 343 if ($c+2 >= $strlen_var) { 344 $c += 2; 345 $ascii .= '?'; 346 break; 347 } 348 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 349 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 350 $char = pack('C*', $ord_var_c, 351 @ord($var[$c + 1]), 352 @ord($var[$c + 2])); 353 $c += 2; 354 $utf16 = $this->utf82utf16($char); 355 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 356 break; 357 358 case (($ord_var_c & 0xF8) == 0xF0): 359 if ($c+3 >= $strlen_var) { 360 $c += 3; 361 $ascii .= '?'; 362 break; 363 } 364 // characters U-00010000 - U-001FFFFF, mask 11110XXX 365 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 366 $char = pack('C*', $ord_var_c, 367 ord($var[$c + 1]), 368 ord($var[$c + 2]), 369 ord($var[$c + 3])); 370 $c += 3; 371 $utf16 = $this->utf82utf16($char); 372 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 373 break; 374 375 case (($ord_var_c & 0xFC) == 0xF8): 376 // characters U-00200000 - U-03FFFFFF, mask 111110XX 377 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 378 if ($c+4 >= $strlen_var) { 379 $c += 4; 380 $ascii .= '?'; 381 break; 382 } 383 $char = pack('C*', $ord_var_c, 384 ord($var[$c + 1]), 385 ord($var[$c + 2]), 386 ord($var[$c + 3]), 387 ord($var[$c + 4])); 388 $c += 4; 389 $utf16 = $this->utf82utf16($char); 390 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 391 break; 392 393 case (($ord_var_c & 0xFE) == 0xFC): 394 if ($c+5 >= $strlen_var) { 395 $c += 5; 396 $ascii .= '?'; 397 break; 398 } 399 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 400 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 401 $char = pack('C*', $ord_var_c, 402 ord($var[$c + 1]), 403 ord($var[$c + 2]), 404 ord($var[$c + 3]), 405 ord($var[$c + 4]), 406 ord($var[$c + 5])); 407 $c += 5; 408 $utf16 = $this->utf82utf16($char); 409 $ascii .= sprintf('\u%04s', bin2hex($utf16)); 410 break; 411 } 412 } 413 return '"'.$ascii.'"'; 414 415 case 'array': 416 /* 417 * As per JSON spec if any array key is not an integer 418 * we must treat the the whole array as an object. We 419 * also try to catch a sparsely populated associative 420 * array with numeric keys here because some JS engines 421 * will create an array with empty indexes up to 422 * max_index which can cause memory issues and because 423 * the keys, which may be relevant, will be remapped 424 * otherwise. 425 * 426 * As per the ECMA and JSON specification an object may 427 * have any string as a property. Unfortunately due to 428 * a hole in the ECMA specification if the key is a 429 * ECMA reserved word or starts with a digit the 430 * parameter is only accessible using ECMAScript's 431 * bracket notation. 432 */ 433 434 // treat as a JSON object 435 if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) { 436 $properties = array_map(array($this, 'name_value'), 437 array_keys($var), 438 array_values($var)); 439 440 foreach($properties as $property) { 441 if(Services_JSON::isError($property)) { 442 return $property; 443 } 444 } 445 446 return '{' . join(',', $properties) . '}'; 447 } 448 449 // treat it like a regular array 450 $elements = array_map(array($this, '_encode'), $var); 451 452 foreach($elements as $element) { 453 if(Services_JSON::isError($element)) { 454 return $element; 455 } 456 } 457 458 return '[' . join(',', $elements) . ']'; 459 460 case 'object': 461 $vars = get_object_vars($var); 462 463 $properties = array_map(array($this, 'name_value'), 464 array_keys($vars), 465 array_values($vars)); 466 467 foreach($properties as $property) { 468 if(Services_JSON::isError($property)) { 469 return $property; 470 } 471 } 472 473 return '{' . join(',', $properties) . '}'; 474 475 default: 476 return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) 477 ? 'null' 478 : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string"); 479 } 480 } 481 482 /** 483 * array-walking function for use in generating JSON-formatted name-value pairs 484 * 485 * @param string $name name of key to use 486 * @param mixed $value reference to an array element to be encoded 487 * 488 * @return string JSON-formatted name-value pair, like '"name":value' 489 * @access private 490 */ 491 function name_value($name, $value) 492 { 493 $encoded_value = $this->_encode($value); 494 495 if(Services_JSON::isError($encoded_value)) { 496 return $encoded_value; 497 } 498 499 return $this->_encode(strval($name)) . ':' . $encoded_value; 500 } 501 502 /** 503 * reduce a string by removing leading and trailing comments and whitespace 504 * 505 * @param $str string string value to strip of comments and whitespace 506 * 507 * @return string string value stripped of comments and whitespace 508 * @access private 509 */ 510 function reduce_string($str) 511 { 512 $str = preg_replace(array( 513 514 // eliminate single line comments in '// ...' form 515 '#^\s*//(.+)$#m', 516 517 // eliminate multi-line comments in '/* ... */' form, at start of string 518 '#^\s*/\*(.+)\*/#Us', 519 520 // eliminate multi-line comments in '/* ... */' form, at end of string 521 '#/\*(.+)\*/\s*$#Us' 522 523 ), '', $str); 524 525 // eliminate extraneous space 526 return trim($str); 527 } 528 529 /** 530 * decodes a JSON string into appropriate variable 531 * 532 * @param string $str JSON-formatted string 533 * 534 * @return mixed number, boolean, string, array, or object 535 * corresponding to given JSON input string. 536 * See argument 1 to Services_JSON() above for object-output behavior. 537 * Note that decode() always returns strings 538 * in ASCII or UTF-8 format! 539 * @access public 540 */ 541 function decode($str) 542 { 543 $str = $this->reduce_string($str); 544 545 switch (strtolower($str)) { 546 case 'true': 547 return true; 548 549 case 'false': 550 return false; 551 552 case 'null': 553 return null; 554 555 default: 556 $m = array(); 557 558 if (is_numeric($str)) { 559 // Lookie-loo, it's a number 560 561 // This would work on its own, but I'm trying to be 562 // good about returning integers where appropriate: 563 // return (float)$str; 564 565 // Return float or int, as appropriate 566 return ((float)$str == (integer)$str) 567 ? (integer)$str 568 : (float)$str; 569 570 } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) { 571 // STRINGS RETURNED IN UTF-8 FORMAT 572 $delim = substr($str, 0, 1); 573 $chrs = substr($str, 1, -1); 574 $utf8 = ''; 575 $strlen_chrs = strlen($chrs); 576 577 for ($c = 0; $c < $strlen_chrs; ++$c) { 578 579 $substr_chrs_c_2 = substr($chrs, $c, 2); 580 $ord_chrs_c = ord($chrs[$c]); 581 582 switch (true) { 583 case $substr_chrs_c_2 == '\b': 584 $utf8 .= chr(0x08); 585 ++$c; 586 break; 587 case $substr_chrs_c_2 == '\t': 588 $utf8 .= chr(0x09); 589 ++$c; 590 break; 591 case $substr_chrs_c_2 == '\n': 592 $utf8 .= chr(0x0A); 593 ++$c; 594 break; 595 case $substr_chrs_c_2 == '\f': 596 $utf8 .= chr(0x0C); 597 ++$c; 598 break; 599 case $substr_chrs_c_2 == '\r': 600 $utf8 .= chr(0x0D); 601 ++$c; 602 break; 603 604 case $substr_chrs_c_2 == '\\"': 605 case $substr_chrs_c_2 == '\\\'': 606 case $substr_chrs_c_2 == '\\\\': 607 case $substr_chrs_c_2 == '\\/': 608 if (($delim == '"' && $substr_chrs_c_2 != '\\\'') || 609 ($delim == "'" && $substr_chrs_c_2 != '\\"')) { 610 $utf8 .= $chrs[++$c]; 611 } 612 break; 613 614 case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)): 615 // single, escaped unicode character 616 $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2))) 617 . chr(hexdec(substr($chrs, ($c + 4), 2))); 618 $utf8 .= $this->utf162utf8($utf16); 619 $c += 5; 620 break; 621 622 case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F): 623 $utf8 .= $chrs[$c]; 624 break; 625 626 case ($ord_chrs_c & 0xE0) == 0xC0: 627 // characters U-00000080 - U-000007FF, mask 110XXXXX 628 //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 629 $utf8 .= substr($chrs, $c, 2); 630 ++$c; 631 break; 632 633 case ($ord_chrs_c & 0xF0) == 0xE0: 634 // characters U-00000800 - U-0000FFFF, mask 1110XXXX 635 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 636 $utf8 .= substr($chrs, $c, 3); 637 $c += 2; 638 break; 639 640 case ($ord_chrs_c & 0xF8) == 0xF0: 641 // characters U-00010000 - U-001FFFFF, mask 11110XXX 642 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 643 $utf8 .= substr($chrs, $c, 4); 644 $c += 3; 645 break; 646 647 case ($ord_chrs_c & 0xFC) == 0xF8: 648 // characters U-00200000 - U-03FFFFFF, mask 111110XX 649 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 650 $utf8 .= substr($chrs, $c, 5); 651 $c += 4; 652 break; 653 654 case ($ord_chrs_c & 0xFE) == 0xFC: 655 // characters U-04000000 - U-7FFFFFFF, mask 1111110X 656 // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 657 $utf8 .= substr($chrs, $c, 6); 658 $c += 5; 659 break; 660 661 } 662 663 } 664 665 return $utf8; 666 667 } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) { 668 // array, or object notation 669 670 if ($str[0] == '[') { 671 $stk = array(SERVICES_JSON_IN_ARR); 672 $arr = array(); 673 } else { 674 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 675 $stk = array(SERVICES_JSON_IN_OBJ); 676 $obj = array(); 677 } else { 678 $stk = array(SERVICES_JSON_IN_OBJ); 679 $obj = new stdClass(); 680 } 681 } 682 683 array_push($stk, array('what' => SERVICES_JSON_SLICE, 684 'where' => 0, 685 'delim' => false)); 686 687 $chrs = substr($str, 1, -1); 688 $chrs = $this->reduce_string($chrs); 689 690 if ($chrs == '') { 691 if (reset($stk) == SERVICES_JSON_IN_ARR) { 692 return $arr; 693 694 } else { 695 return $obj; 696 697 } 698 } 699 700 //print("\nparsing {$chrs}\n"); 701 702 $strlen_chrs = strlen($chrs); 703 704 for ($c = 0; $c <= $strlen_chrs; ++$c) { 705 706 $top = end($stk); 707 $substr_chrs_c_2 = substr($chrs, $c, 2); 708 709 if (($c == $strlen_chrs) || (($chrs[$c] == ',') && ($top['what'] == SERVICES_JSON_SLICE))) { 710 // found a comma that is not inside a string, array, etc., 711 // OR we've reached the end of the character list 712 $slice = substr($chrs, $top['where'], ($c - $top['where'])); 713 array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); 714 //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 715 716 if (reset($stk) == SERVICES_JSON_IN_ARR) { 717 // we are in an array, so just push an element onto the stack 718 array_push($arr, $this->decode($slice)); 719 720 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 721 // we are in an object, so figure 722 // out the property name and set an 723 // element in an associative array, 724 // for now 725 $parts = array(); 726 727 if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { 728 // "name":value pair 729 $key = $this->decode($parts[1]); 730 $val = $this->decode($parts[2]); 731 732 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 733 $obj[$key] = $val; 734 } else { 735 $obj->$key = $val; 736 } 737 } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { 738 // name:value pair, where name is unquoted 739 $key = $parts[1]; 740 $val = $this->decode($parts[2]); 741 742 if ($this->use & SERVICES_JSON_LOOSE_TYPE) { 743 $obj[$key] = $val; 744 } else { 745 $obj->$key = $val; 746 } 747 } 748 749 } 750 751 } elseif ((($chrs[$c] == '"') || ($chrs[$c] == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) { 752 // found a quote, and we are not inside a string 753 array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs[$c])); 754 //print("Found start of string at {$c}\n"); 755 756 } elseif (($chrs[$c] == $top['delim']) && 757 ($top['what'] == SERVICES_JSON_IN_STR) && 758 ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) { 759 // found a quote, we're in a string, and it's not escaped 760 // we know that it's not escaped becase there is _not_ an 761 // odd number of backslashes at the end of the string so far 762 array_pop($stk); 763 //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n"); 764 765 } elseif (($chrs[$c] == '[') && 766 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 767 // found a left-bracket, and we are in an array, object, or slice 768 array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false)); 769 //print("Found start of array at {$c}\n"); 770 771 } elseif (($chrs[$c] == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) { 772 // found a right-bracket, and we're in an array 773 array_pop($stk); 774 //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 775 776 } elseif (($chrs[$c] == '{') && 777 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 778 // found a left-brace, and we are in an array, object, or slice 779 array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false)); 780 //print("Found start of object at {$c}\n"); 781 782 } elseif (($chrs[$c] == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) { 783 // found a right-brace, and we're in an object 784 array_pop($stk); 785 //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 786 787 } elseif (($substr_chrs_c_2 == '/*') && 788 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { 789 // found a comment start, and we are in an array, object, or slice 790 array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false)); 791 $c++; 792 //print("Found start of comment at {$c}\n"); 793 794 } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) { 795 // found a comment end, and we're in one now 796 array_pop($stk); 797 $c++; 798 799 for ($i = $top['where']; $i <= $c; ++$i) 800 $chrs = substr_replace($chrs, ' ', $i, 1); 801 802 //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); 803 804 } 805 806 } 807 808 if (reset($stk) == SERVICES_JSON_IN_ARR) { 809 return $arr; 810 811 } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { 812 return $obj; 813 814 } 815 816 } 817 } 818 } 819 820 /** 821 * @todo Ultimately, this should just call PEAR::isError() 822 */ 823 function isError($data, $code = null) 824 { 825 if (class_exists('pear')) { 826 return PEAR::isError($data, $code); 827 } elseif (is_object($data) && (get_class($data) == 'services_json_error' || 828 is_subclass_of($data, 'services_json_error'))) { 829 return true; 830 } 831 832 return false; 833 } 834 } 835 836 if (class_exists('PEAR_Error')) { 837 838 class Services_JSON_Error extends PEAR_Error 839 { 840 function Services_JSON_Error($message = 'unknown error', $code = null, 841 $mode = null, $options = null, $userinfo = null) 842 { 843 parent::PEAR_Error($message, $code, $mode, $options, $userinfo); 844 } 845 } 846 847 } else { 848 849 /** 850 * @todo Ultimately, this class shall be descended from PEAR_Error 851 */ 852 class Services_JSON_Error 853 { 854 function Services_JSON_Error($message = 'unknown error', $code = null, 855 $mode = null, $options = null, $userinfo = null) 856 { 857 858 } 859 } 860 861 } 862 endif;
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| Generated: Fri May 25 03:56:23 2012 | Hosted by follow the white rabbit. |