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/includes/api/ApiFormatJson_json.php

https://github.com/tav/confluence
PHP | 861 lines | 468 code | 118 blank | 275 comment | 105 complexity | b34e9b345d0b8b343c6c8410b2b98281 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-3.0 
    

  1. <?php
    2. 

  2. /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
    3. 

  3. 

  4. /**
    5. 

  5. * Converts to and from JSON format.
    6. 

  6. *
    7. 

  7. * JSON (JavaScript Object Notation) is a lightweight data-interchange
    8. 

  8. * format. It is easy for humans to read and write. It is easy for machines
    9. 

  9. * to parse and generate. It is based on a subset of the JavaScript
    10. 

  10. * Programming Language, Standard ECMA-262 3rd Edition - December 1999.
    11. 

  11. * This feature can also be found in  Python. JSON is a text format that is
    12. 

  12. * completely language independent but uses conventions that are familiar
    13. 

  13. * to programmers of the C-family of languages, including C, C++, C#, Java,
    14. 

  14. * JavaScript, Perl, TCL, and many others. These properties make JSON an
    15. 

  15. * ideal data-interchange language.
    16. 

  16. *
    17. 

  17. * This package provides a simple encoder and decoder for JSON notation. It
    18. 

  18. * is intended for use with client-side Javascript applications that make
    19. 

  19. * use of HTTPRequest to perform server communication functions - data can
    20. 

  20. * be encoded into JSON notation for use in a client-side javascript, or
    21. 

  21. * decoded from incoming Javascript requests. JSON format is native to
    22. 

  22. * Javascript, and can be directly eval()'ed with no further parsing
    23. 

  23. * overhead
    24. 

  24. *
    25. 

  25. * All strings should be in ASCII or UTF-8 format!
    26. 

  26. *
    27. 

  27. * LICENSE: Redistribution and use in source and binary forms, with or
    28. 

  28. * without modification, are permitted provided that the following
    29. 

  29. * conditions are met: Redistributions of source code must retain the
    30. 

  30. * above copyright notice, this list of conditions and the following
    31. 

  31. * disclaimer. Redistributions in binary form must reproduce the above
    32. 

  32. * copyright notice, this list of conditions and the following disclaimer
    33. 

  33. * in the documentation and/or other materials provided with the
    34. 

  34. * distribution.
    35. 

  35. *
    36. 

  36. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
    37. 

  37. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    38. 

  38. * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
    39. 

  39. * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
    40. 

  40. * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
    41. 

  41. * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
    42. 

  42. * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    43. 

  43. * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
    44. 

  44. * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
    45. 

  45. * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
    46. 

  46. * DAMAGE.
    47. 

  47. *
    48. 

  48. * @ingroup API
    49. 

  49. * @author Michal Migurski <mike-json@teczno.com>
    50. 

  50. * @author Matt Knapp <mdknapp[at]gmail[dot]com>
    51. 

  51. * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com>
    52. 

  52. * @copyright 2005 Michal Migurski
    53. 

  53. * @version CVS: $Id: ApiFormatJson_json.php 45765 2009-01-15 10:18:44Z catrope $
    54. 

  54. * @license http://www.opensource.org/licenses/bsd-license.php
    55. 

  55. * @see http://pear.php.net/pepr/pepr-proposal-show.php?id=198
    56. 

  56. */
    57. 

  57. 

  58. /**
    59. 

  59. * Marker constant for Services_JSON::decode(), used to flag stack state
    60. 

  60. */
    61. 

  61. define('SERVICES_JSON_SLICE',   1);
    62. 

  62. 

  63. /**
    64. 

  64. * Marker constant for Services_JSON::decode(), used to flag stack state
    65. 

  65. */
    66. 

  66. define('SERVICES_JSON_IN_STR',  2);
    67. 

  67. 

  68. /**
    69. 

  69. * Marker constant for Services_JSON::decode(), used to flag stack state
    70. 

  70. */
    71. 

  71. define('SERVICES_JSON_IN_ARR',  3);
    72. 

  72. 

  73. /**
    74. 

  74. * Marker constant for Services_JSON::decode(), used to flag stack state
    75. 

  75. */
    76. 

  76. define('SERVICES_JSON_IN_OBJ',  4);
    77. 

  77. 

  78. /**
    79. 

  79. * Marker constant for Services_JSON::decode(), used to flag stack state
    80. 

  80. */
    81. 

  81. define('SERVICES_JSON_IN_CMT', 5);
    82. 

  82. 

  83. /**
    84. 

  84. * Behavior switch for Services_JSON::decode()
    85. 

  85. */
    86. 

  86. define('SERVICES_JSON_LOOSE_TYPE', 16);
    87. 

  87. 

  88. /**
    89. 

  89. * Behavior switch for Services_JSON::decode()
    90. 

  90. */
    91. 

  91. define('SERVICES_JSON_SUPPRESS_ERRORS', 32);
    92. 

  92. 

  93. /**
    94. 

  94.  * Converts to and from JSON format.
    95. 

  95.  *
    96. 

  96.  * Brief example of use:
    97. 

  97.  *
    98. 

  98.  * <code>
    99. 

  99.  * // create a new instance of Services_JSON
    100. 

  100.  * $json = new Services_JSON();
    101. 

  101.  *
    102. 

  102.  * // convert a complexe value to JSON notation, and send it to the browser
    103. 

  103.  * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4)));
    104. 

  104.  * $output = $json->encode($value);
    105. 

  105.  *
    106. 

  106.  * print($output);
    107. 

  107.  * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]]
    108. 

  108.  *
    109. 

  109.  * // accept incoming POST data, assumed to be in JSON notation
    110. 

  110.  * $input = file_get_contents('php://input', 1000000);
    111. 

  111.  * $value = $json->decode($input);
    112. 

  112.  * </code>
    113. 

  113.  *
    114. 

  114.  * @ingroup API
    115. 

  115.  */
    116. 

  116. class Services_JSON
    117. 

  117. {
    118. 

  118. 	/**
    119. 

  119. 	 * constructs a new JSON instance
    120. 

  120. 	 *
    121. 

  121. 	 * @param int $use object behavior flags; combine with boolean-OR
    122. 

  122. 	 *
    123. 

  123. 	 *	possible values:
    124. 

  124. 	 *	- SERVICES_JSON_LOOSE_TYPE:  loose typing.
    125. 

  125. 	 *			"{...}" syntax creates associative arrays
    126. 

  126. 	 *			instead of objects in decode().
    127. 

  127. 	 *	- SERVICES_JSON_SUPPRESS_ERRORS:  error suppression.
    128. 

  128. 	 *			Values which can't be encoded (e.g. resources)
    129. 

  129. 	 *			appear as NULL instead of throwing errors.
    130. 

  130. 	 *			By default, a deeply-nested resource will
    131. 

  131. 	 *			bubble up with an error, so all return values
    132. 

  132. 	 *			from encode() should be checked with isError()
    133. 

  133. 	 */
    134. 

  134. 	function Services_JSON($use = 0)
    135. 

  135. 	{
    136. 

  136. 		$this->use = $use;
    137. 

  137. 	}
    138. 

  138. 

  139. 	/**
    140. 

  140. 	 * convert a string from one UTF-16 char to one UTF-8 char
    141. 

  141. 	 *
    142. 

  142. 	 * Normally should be handled by mb_convert_encoding, but
    143. 

  143. 	 * provides a slower PHP-only method for installations
    144. 

  144. 	 * that lack the multibye string extension.
    145. 

  145. 	 *
    146. 

  146. 	 * @param string  $utf16  UTF-16 character
    147. 

  147. 	 * @return string  UTF-8 character
    148. 

  148. 	 * @access private
    149. 

  149. 	 */
    150. 

  150. 	function utf162utf8($utf16)
    151. 

  151. 	{
    152. 

  152. 		// oh please oh please oh please oh please oh please
    153. 

  153. 		if(function_exists('mb_convert_encoding')) {
    154. 

  154. 			return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
    155. 

  155. 		}
    156. 

  156. 

  157. 		$bytes = (ord($utf16{0}) << 8) | ord($utf16{1});
    158. 

  158. 

  159. 		switch(true) {
    160. 

  160. 			case ((0x7F & $bytes) == $bytes):
    161. 

  161. 				// this case should never be reached, because we are in ASCII range
    162. 

  162. 				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    163. 

  163. 				return chr(0x7F & $bytes);
    164. 

  164. 

  165. 			case (0x07FF & $bytes) == $bytes:
    166. 

  166. 				// return a 2-byte UTF-8 character
    167. 

  167. 				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    168. 

  168. 				return chr(0xC0 | (($bytes >> 6) & 0x1F))
    169. 

  169. 					 . chr(0x80 | ($bytes & 0x3F));
    170. 

  170. 

  171. 			case (0xFC00 & $bytes) == 0xD800 && strlen($utf16) >= 4 && (0xFC & ord($utf16{2})) == 0xDC:
    172. 

  172. 				// return a 4-byte UTF-8 character
    173. 

  173. 				$char = ((($bytes & 0x03FF) << 10)
    174. 

  174. 					   | ((ord($utf16{2}) & 0x03) << 8)
    175. 

  175. 					   | ord($utf16{3}));
    176. 

  176. 				$char += 0x10000;
    177. 

  177. 				return chr(0xF0 | (($char >> 18) & 0x07))
    178. 

  178. 					 . chr(0x80 | (($char >> 12) & 0x3F))
    179. 

  179. 					 . chr(0x80 | (($char >> 6) & 0x3F))
    180. 

  180. 					 . chr(0x80 | ($char & 0x3F));
    181. 

  181. 

  182. 			case (0xFFFF & $bytes) == $bytes:
    183. 

  183. 				// return a 3-byte UTF-8 character
    184. 

  184. 				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    185. 

  185. 				return chr(0xE0 | (($bytes >> 12) & 0x0F))
    186. 

  186. 					 . chr(0x80 | (($bytes >> 6) & 0x3F))
    187. 

  187. 					 . chr(0x80 | ($bytes & 0x3F));
    188. 

  188. 		}
    189. 

  189. 

  190. 		// ignoring UTF-32 for now, sorry
    191. 

  191. 		return '';
    192. 

  192. 	}
    193. 

  193. 

  194. 	/**
    195. 

  195. 	 * convert a string from one UTF-8 char to one UTF-16 char
    196. 

  196. 	 *
    197. 

  197. 	 * Normally should be handled by mb_convert_encoding, but
    198. 

  198. 	 * provides a slower PHP-only method for installations
    199. 

  199. 	 * that lack the multibye string extension.
    200. 

  200. 	 *
    201. 

  201. 	 * @param string  $utf8   UTF-8 character
    202. 

  202. 	 * @return string  UTF-16 character
    203. 

  203. 	 * @access private
    204. 

  204. 	 */
    205. 

  205. 	function utf82utf16($utf8)
    206. 

  206. 	{
    207. 

  207. 		// oh please oh please oh please oh please oh please
    208. 

  208. 		if(function_exists('mb_convert_encoding')) {
    209. 

  209. 			return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
    210. 

  210. 		}
    211. 

  211. 

  212. 		switch(strlen($utf8)) {
    213. 

  213. 			case 1:
    214. 

  214. 				// this case should never be reached, because we are in ASCII range
    215. 

  215. 				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    216. 

  216. 				return $utf8;
    217. 

  217. 

  218. 			case 2:
    219. 

  219. 				// return a UTF-16 character from a 2-byte UTF-8 char
    220. 

  220. 				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    221. 

  221. 				return chr(0x07 & (ord($utf8{0}) >> 2))
    222. 

  222. 					 . chr((0xC0 & (ord($utf8{0}) << 6))
    223. 

  223. 						 | (0x3F & ord($utf8{1})));
    224. 

  224. 

  225. 			case 3:
    226. 

  226. 				// return a UTF-16 character from a 3-byte UTF-8 char
    227. 

  227. 				// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    228. 

  228. 				return chr((0xF0 & (ord($utf8{0}) << 4))
    229. 

  229. 						 | (0x0F & (ord($utf8{1}) >> 2)))
    230. 

  230. 					 . chr((0xC0 & (ord($utf8{1}) << 6))
    231. 

  231. 						 | (0x7F & ord($utf8{2})));
    232. 

  232. 

  233. 			case 4:
    234. 

  234. 				// return a UTF-16 surrogate pair from a 4-byte UTF-8 char
    235. 

  235. 				if(ord($utf8{0}) > 0xF4) return ''; # invalid
    236. 

  236. 				$char = ((0x1C0000 & (ord($utf8{0}) << 18))
    237. 

  237. 					   | (0x03F000 & (ord($utf8{1}) << 12))
    238. 

  238. 					   | (0x000FC0 & (ord($utf8{2}) << 6))
    239. 

  239. 					   | (0x00003F & ord($utf8{3})));
    240. 

  240. 				if($char > 0x10FFFF) return ''; # invalid
    241. 

  241. 				$char -= 0x10000;
    242. 

  242. 				return chr(0xD8 | (($char >> 18) & 0x03))
    243. 

  243. 					 . chr(($char >> 10) & 0xFF)
    244. 

  244. 					 . chr(0xDC | (($char >> 8) & 0x03))
    245. 

  245. 					 . chr($char & 0xFF);
    246. 

  246. 		}
    247. 

  247. 

  248. 		// ignoring UTF-32 for now, sorry
    249. 

  249. 		return '';
    250. 

  250. 	}
    251. 

  251. 

  252. 	/**
    253. 

  253. 	 * encodes an arbitrary variable into JSON format
    254. 

  254. 	 *
    255. 

  255. 	 * @param mixed $var any number, boolean, string, array, or object to be encoded.
    256. 

  256. 	 *			see argument 1 to Services_JSON() above for array-parsing behavior.
    257. 

  257. 	 *			if var is a strng, note that encode() always expects it
    258. 

  258. 	 *			to be in ASCII or UTF-8 format!
    259. 

  259. 	 * @param bool $pretty pretty-print output with indents and newlines
    260. 

  260. 	 *
    261. 

  261. 	 * @return mixed JSON string representation of input var or an error if a problem occurs
    262. 

  262. 	 * @access public
    263. 

  263. 	 */
    264. 

  264. 	function encode($var, $pretty=false)
    265. 

  265. 	{
    266. 

  266. 		$this->indent = 0;
    267. 

  267. 		$this->pretty = $pretty;
    268. 

  268. 		$this->nameValSeparator = $pretty ? ': ' : ':';
    269. 

  269. 		return $this->encode2($var);
    270. 

  270. 	}
    271. 

  271. 

  272.    	/**
    273. 

  273. 	 * encodes an arbitrary variable into JSON format
    274. 

  274. 	 *
    275. 

  275. 	 * @param mixed $var any number, boolean, string, array, or object to be encoded.
    276. 

  276. 	 *			see argument 1 to Services_JSON() above for array-parsing behavior.
    277. 

  277. 	 *			if var is a strng, note that encode() always expects it
    278. 

  278. 	 *			to be in ASCII or UTF-8 format!
    279. 

  279. 	 *
    280. 

  280. 	 * @return mixed JSON string representation of input var or an error if a problem occurs
    281. 

  281. 	 * @access private
    282. 

  282. 	 */
    283. 

  283. 	function encode2($var)
    284. 

  284. 	{
    285. 

  285. 		if ($this->pretty) {
    286. 

  286. 			$close = "\n" . str_repeat("\t", $this->indent);
    287. 

  287. 			$open = $close . "\t";
    288. 

  288. 			$mid = ',' . $open;
    289. 

  289. 		}
    290. 

  290. 		else {
    291. 

  291. 			$open = $close = '';
    292. 

  292. 			$mid = ',';
    293. 

  293. 		}
    294. 

  294. 

  295. 		switch (gettype($var)) {
    296. 

  296. 			case 'boolean':
    297. 

  297. 				return $var ? 'true' : 'false';
    298. 

  298. 

  299. 			case 'NULL':
    300. 

  300. 				return 'null';
    301. 

  301. 

  302. 			case 'integer':
    303. 

  303. 				return (int) $var;
    304. 

  304. 

  305. 			case 'double':
    306. 

  306. 			case 'float':
    307. 

  307. 				return (float) $var;
    308. 

  308. 

  309. 			case 'string':
    310. 

  310. 				// STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
    311. 

  311. 				$ascii = '';
    312. 

  312. 				$strlen_var = strlen($var);
    313. 

  313. 

  314. 			   /*
    315. 

  315. 				* Iterate over every character in the string,
    316. 

  316. 				* escaping with a slash or encoding to UTF-8 where necessary
    317. 

  317. 				*/
    318. 

  318. 				for ($c = 0; $c < $strlen_var; ++$c) {
    319. 

  319. 

  320. 					$ord_var_c = ord($var{$c});
    321. 

  321. 

  322. 					switch (true) {
    323. 

  323. 						case $ord_var_c == 0x08:
    324. 

  324. 							$ascii .= '\b';
    325. 

  325. 							break;
    326. 

  326. 						case $ord_var_c == 0x09:
    327. 

  327. 							$ascii .= '\t';
    328. 

  328. 							break;
    329. 

  329. 						case $ord_var_c == 0x0A:
    330. 

  330. 							$ascii .= '\n';
    331. 

  331. 							break;
    332. 

  332. 						case $ord_var_c == 0x0C:
    333. 

  333. 							$ascii .= '\f';
    334. 

  334. 							break;
    335. 

  335. 						case $ord_var_c == 0x0D:
    336. 

  336. 							$ascii .= '\r';
    337. 

  337. 							break;
    338. 

  338. 

  339. 						case $ord_var_c == 0x22:
    340. 

  340. 						case $ord_var_c == 0x2F:
    341. 

  341. 						case $ord_var_c == 0x5C:
    342. 

  342. 							// double quote, slash, slosh
    343. 

  343. 							$ascii .= '\\'.$var{$c};
    344. 

  344. 							break;
    345. 

  345. 

  346. 						case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
    347. 

  347. 							// characters U-00000000 - U-0000007F (same as ASCII)
    348. 

  348. 							$ascii .= $var{$c};
    349. 

  349. 							break;
    350. 

  350. 

  351. 						case (($ord_var_c & 0xE0) == 0xC0):
    352. 

  352. 							// characters U-00000080 - U-000007FF, mask 110XXXXX
    353. 

  353. 							// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    354. 

  354. 							$char = pack('C*', $ord_var_c, ord($var{$c + 1}));
    355. 

  355. 							$c += 1;
    356. 

  356. 							$utf16 = $this->utf82utf16($char);
    357. 

  357. 							$ascii .= sprintf('\u%04s', bin2hex($utf16));
    358. 

  358. 							break;
    359. 

  359. 

  360. 						case (($ord_var_c & 0xF0) == 0xE0):
    361. 

  361. 							// characters U-00000800 - U-0000FFFF, mask 1110XXXX
    362. 

  362. 							// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    363. 

  363. 							$char = pack('C*', $ord_var_c,
    364. 

  364. 									ord($var{$c + 1}),
    365. 

  365. 									ord($var{$c + 2}));
    366. 

  366. 							$c += 2;
    367. 

  367. 							$utf16 = $this->utf82utf16($char);
    368. 

  368. 							$ascii .= sprintf('\u%04s', bin2hex($utf16));
    369. 

  369. 							break;
    370. 

  370. 

  371. 						case (($ord_var_c & 0xF8) == 0xF0):
    372. 

  372. 							// characters U-00010000 - U-001FFFFF, mask 11110XXX
    373. 

  373. 							// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    374. 

  374. 							// These will always return a surrogate pair
    375. 

  375. 							$char = pack('C*', $ord_var_c,
    376. 

  376. 									ord($var{$c + 1}),
    377. 

  377. 									ord($var{$c + 2}),
    378. 

  378. 									ord($var{$c + 3}));
    379. 

  379. 							$c += 3;
    380. 

  380. 							$utf16 = $this->utf82utf16($char);
    381. 

  381. 							if($utf16 == '') {
    382. 

  382. 								$ascii .= '\ufffd';
    383. 

  383. 							} else {
    384. 

  384. 								$utf16 = str_split($utf16, 2);
    385. 

  385. 								$ascii .= sprintf('\u%04s\u%04s', bin2hex($utf16[0]), bin2hex($utf16[1]));
    386. 

  386. 							}
    387. 

  387. 							break;
    388. 

  388. 					}
    389. 

  389. 				}
    390. 

  390. 

  391. 				return '"'.$ascii.'"';
    392. 

  392. 

  393. 			case 'array':
    394. 

  394. 			   /*
    395. 

  395. 				* As per JSON spec if any array key is not an integer
    396. 

  396. 				* we must treat the the whole array as an object. We
    397. 

  397. 				* also try to catch a sparsely populated associative
    398. 

  398. 				* array with numeric keys here because some JS engines
    399. 

  399. 				* will create an array with empty indexes up to
    400. 

  400. 				* max_index which can cause memory issues and because
    401. 

  401. 				* the keys, which may be relevant, will be remapped
    402. 

  402. 				* otherwise.
    403. 

  403. 				*
    404. 

  404. 				* As per the ECMA and JSON specification an object may
    405. 

  405. 				* have any string as a property. Unfortunately due to
    406. 

  406. 				* a hole in the ECMA specification if the key is a
    407. 

  407. 				* ECMA reserved word or starts with a digit the
    408. 

  408. 				* parameter is only accessible using ECMAScript's
    409. 

  409. 				* bracket notation.
    410. 

  410. 				*/
    411. 

  411. 

  412. 				// treat as a JSON object
    413. 

  413. 				if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {
    414. 

  414. 					$this->indent++;
    415. 

  415. 					$properties = array_map(array($this, 'name_value'),
    416. 

  416. 								array_keys($var),
    417. 

  417. 								array_values($var));
    418. 

  418. 					$this->indent--;
    419. 

  419. 

  420. 					foreach($properties as $property) {
    421. 

  421. 						if(Services_JSON::isError($property)) {
    422. 

  422. 							return $property;
    423. 

  423. 						}
    424. 

  424. 					}
    425. 

  425. 

  426. 					return '{' . $open . join($mid, $properties) . $close . '}';
    427. 

  427. 				}
    428. 

  428. 

  429. 				// treat it like a regular array
    430. 

  430. 				$this->indent++;
    431. 

  431. 				$elements = array_map(array($this, 'encode2'), $var);
    432. 

  432. 				$this->indent--;
    433. 

  433. 

  434. 				foreach($elements as $element) {
    435. 

  435. 					if(Services_JSON::isError($element)) {
    436. 

  436. 						return $element;
    437. 

  437. 					}
    438. 

  438. 				}
    439. 

  439. 

  440. 				return '[' . $open . join($mid, $elements) . $close . ']';
    441. 

  441. 

  442. 			case 'object':
    443. 

  443. 				$vars = get_object_vars($var);
    444. 

  444. 

  445. 				$this->indent++;
    446. 

  446. 				$properties = array_map(array($this, 'name_value'),
    447. 

  447. 							array_keys($vars),
    448. 

  448. 							array_values($vars));
    449. 

  449. 				$this->indent--;
    450. 

  450. 

  451. 				foreach($properties as $property) {
    452. 

  452. 					if(Services_JSON::isError($property)) {
    453. 

  453. 						return $property;
    454. 

  454. 					}
    455. 

  455. 				}
    456. 

  456. 

  457. 				return '{' . $open . join($mid, $properties) . $close . '}';
    458. 

  458. 

  459. 			default:
    460. 

  460. 				return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
    461. 

  461. 					? 'null'
    462. 

  462. 					: new Services_JSON_Error(gettype($var)." can not be encoded as JSON string");
    463. 

  463. 		}
    464. 

  464. 	}
    465. 

  465. 

  466. 	/**
    467. 

  467. 	 * array-walking function for use in generating JSON-formatted name-value pairs
    468. 

  468. 	 *
    469. 

  469. 	 * @param string $name name of key to use
    470. 

  470. 	 * @param mixed $value reference to an array element to be encoded
    471. 

  471. 	 *
    472. 

  472. 	 * @return string JSON-formatted name-value pair, like '"name":value'
    473. 

  473. 	 * @access private
    474. 

  474. 	 */
    475. 

  475. 	function name_value($name, $value)
    476. 

  476. 	{
    477. 

  477. 		$encoded_value = $this->encode2($value);
    478. 

  478. 

  479. 		if(Services_JSON::isError($encoded_value)) {
    480. 

  480. 			return $encoded_value;
    481. 

  481. 		}
    482. 

  482. 

  483. 		return $this->encode2(strval($name)) . $this->nameValSeparator . $encoded_value;
    484. 

  484. 	}
    485. 

  485. 

  486. 	/**
    487. 

  487. 	 * reduce a string by removing leading and trailing comments and whitespace
    488. 

  488. 	 *
    489. 

  489. 	 * @param $str string string value to strip of comments and whitespace
    490. 

  490. 	 *
    491. 

  491. 	 * @return string string value stripped of comments and whitespace
    492. 

  492. 	 * @access private
    493. 

  493. 	 */
    494. 

  494. 	function reduce_string($str)
    495. 

  495. 	{
    496. 

  496. 		$str = preg_replace(array(
    497. 

  497. 

  498. 				// eliminate single line comments in '// ...' form
    499. 

  499. 				'#^\s*//(.+)$#m',
    500. 

  500. 

  501. 				// eliminate multi-line comments in '/* ... */' form, at start of string
    502. 

  502. 				'#^\s*/\*(.+)\*/#Us',
    503. 

  503. 

  504. 				// eliminate multi-line comments in '/* ... */' form, at end of string
    505. 

  505. 				'#/\*(.+)\*/\s*$#Us'
    506. 

  506. 

  507. 			), '', $str);
    508. 

  508. 

  509. 		// eliminate extraneous space
    510. 

  510. 		return trim($str);
    511. 

  511. 	}
    512. 

  512. 

  513. 	/**
    514. 

  514. 	 * decodes a JSON string into appropriate variable
    515. 

  515. 	 *
    516. 

  516. 	 * @param string $str JSON-formatted string
    517. 

  517. 	 *
    518. 

  518. 	 * @return mixed number, boolean, string, array, or object
    519. 

  519. 	 *		   corresponding to given JSON input string.
    520. 

  520. 	 *		   See argument 1 to Services_JSON() above for object-output behavior.
    521. 

  521. 	 *		   Note that decode() always returns strings
    522. 

  522. 	 *		   in ASCII or UTF-8 format!
    523. 

  523. 	 * @access public
    524. 

  524. 	 */
    525. 

  525. 	function decode($str)
    526. 

  526. 	{
    527. 

  527. 		$str = $this->reduce_string($str);
    528. 

  528. 

  529. 		switch (strtolower($str)) {
    530. 

  530. 			case 'true':
    531. 

  531. 				return true;
    532. 

  532. 

  533. 			case 'false':
    534. 

  534. 				return false;
    535. 

  535. 

  536. 			case 'null':
    537. 

  537. 				return null;
    538. 

  538. 

  539. 			default:
    540. 

  540. 				$m = array();
    541. 

  541. 

  542. 				if (is_numeric($str)) {
    543. 

  543. 					// Lookie-loo, it's a number
    544. 

  544. 

  545. 					// This would work on its own, but I'm trying to be
    546. 

  546. 					// good about returning integers where appropriate:
    547. 

  547. 					// return (float)$str;
    548. 

  548. 

  549. 					// Return float or int, as appropriate
    550. 

  550. 					return ((float)$str == (integer)$str)
    551. 

  551. 						? (integer)$str
    552. 

  552. 						: (float)$str;
    553. 

  553. 

  554. 				} elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) {
    555. 

  555. 					// STRINGS RETURNED IN UTF-8 FORMAT
    556. 

  556. 					$delim = substr($str, 0, 1);
    557. 

  557. 					$chrs = substr($str, 1, -1);
    558. 

  558. 					$utf8 = '';
    559. 

  559. 					$strlen_chrs = strlen($chrs);
    560. 

  560. 

  561. 					for ($c = 0; $c < $strlen_chrs; ++$c) {
    562. 

  562. 

  563. 						$substr_chrs_c_2 = substr($chrs, $c, 2);
    564. 

  564. 						$ord_chrs_c = ord($chrs{$c});
    565. 

  565. 

  566. 						switch (true) {
    567. 

  567. 							case $substr_chrs_c_2 == '\b':
    568. 

  568. 								$utf8 .= chr(0x08);
    569. 

  569. 								++$c;
    570. 

  570. 								break;
    571. 

  571. 							case $substr_chrs_c_2 == '\t':
    572. 

  572. 								$utf8 .= chr(0x09);
    573. 

  573. 								++$c;
    574. 

  574. 								break;
    575. 

  575. 							case $substr_chrs_c_2 == '\n':
    576. 

  576. 								$utf8 .= chr(0x0A);
    577. 

  577. 								++$c;
    578. 

  578. 								break;
    579. 

  579. 							case $substr_chrs_c_2 == '\f':
    580. 

  580. 								$utf8 .= chr(0x0C);
    581. 

  581. 								++$c;
    582. 

  582. 								break;
    583. 

  583. 							case $substr_chrs_c_2 == '\r':
    584. 

  584. 								$utf8 .= chr(0x0D);
    585. 

  585. 								++$c;
    586. 

  586. 								break;
    587. 

  587. 

  588. 							case $substr_chrs_c_2 == '\\"':
    589. 

  589. 							case $substr_chrs_c_2 == '\\\'':
    590. 

  590. 							case $substr_chrs_c_2 == '\\\\':
    591. 

  591. 							case $substr_chrs_c_2 == '\\/':
    592. 

  592. 								if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
    593. 

  593. 								   ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
    594. 

  594. 									$utf8 .= $chrs{++$c};
    595. 

  595. 								}
    596. 

  596. 								break;
    597. 

  597. 

  598. 							case preg_match('/\\\uD[89AB][0-9A-F]{2}\\\uD[C-F][0-9A-F]{2}/i', substr($chrs, $c, 12)):
    599. 

  599. 								// escaped unicode surrogate pair
    600. 

  600. 								$utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
    601. 

  601. 									   . chr(hexdec(substr($chrs, ($c + 4), 2)))
    602. 

  602. 									   . chr(hexdec(substr($chrs, ($c + 8), 2)))
    603. 

  603. 									   . chr(hexdec(substr($chrs, ($c + 10), 2)));
    604. 

  604. 								$utf8 .= $this->utf162utf8($utf16);
    605. 

  605. 								$c += 11;
    606. 

  606. 								break;
    607. 

  607. 

  608. 							case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):
    609. 

  609. 								// single, escaped unicode character
    610. 

  610. 								$utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
    611. 

  611. 									   . chr(hexdec(substr($chrs, ($c + 4), 2)));
    612. 

  612. 								$utf8 .= $this->utf162utf8($utf16);
    613. 

  613. 								$c += 5;
    614. 

  614. 								break;
    615. 

  615. 

  616. 							case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):
    617. 

  617. 								$utf8 .= $chrs{$c};
    618. 

  618. 								break;
    619. 

  619. 

  620. 							case ($ord_chrs_c & 0xE0) == 0xC0:
    621. 

  621. 								// characters U-00000080 - U-000007FF, mask 110XXXXX
    622. 

  622. 								//see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    623. 

  623. 								$utf8 .= substr($chrs, $c, 2);
    624. 

  624. 								++$c;
    625. 

  625. 								break;
    626. 

  626. 

  627. 							case ($ord_chrs_c & 0xF0) == 0xE0:
    628. 

  628. 								// characters U-00000800 - U-0000FFFF, mask 1110XXXX
    629. 

  629. 								// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    630. 

  630. 								$utf8 .= substr($chrs, $c, 3);
    631. 

  631. 								$c += 2;
    632. 

  632. 								break;
    633. 

  633. 

  634. 							case ($ord_chrs_c & 0xF8) == 0xF0:
    635. 

  635. 								// characters U-00010000 - U-001FFFFF, mask 11110XXX
    636. 

  636. 								// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    637. 

  637. 								$utf8 .= substr($chrs, $c, 4);
    638. 

  638. 								$c += 3;
    639. 

  639. 								break;
    640. 

  640. 

  641. 							case ($ord_chrs_c & 0xFC) == 0xF8:
    642. 

  642. 								// characters U-00200000 - U-03FFFFFF, mask 111110XX
    643. 

  643. 								// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    644. 

  644. 								$utf8 .= substr($chrs, $c, 5);
    645. 

  645. 								$c += 4;
    646. 

  646. 								break;
    647. 

  647. 

  648. 							case ($ord_chrs_c & 0xFE) == 0xFC:
    649. 

  649. 								// characters U-04000000 - U-7FFFFFFF, mask 1111110X
    650. 

  650. 								// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
    651. 

  651. 								$utf8 .= substr($chrs, $c, 6);
    652. 

  652. 								$c += 5;
    653. 

  653. 								break;
    654. 

  654. 

  655. 						}
    656. 

  656. 

  657. 					}
    658. 

  658. 

  659. 					return $utf8;
    660. 

  660. 

  661. 				} elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {
    662. 

  662. 					// array, or object notation
    663. 

  663. 

  664. 					if ($str{0} == '[') {
    665. 

  665. 						$stk = array(SERVICES_JSON_IN_ARR);
    666. 

  666. 						$arr = array();
    667. 

  667. 					} else {
    668. 

  668. 						if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
    669. 

  669. 							$stk = array(SERVICES_JSON_IN_OBJ);
    670. 

  670. 							$obj = array();
    671. 

  671. 						} else {
    672. 

  672. 							$stk = array(SERVICES_JSON_IN_OBJ);
    673. 

  673. 							$obj = new stdClass();
    674. 

  674. 						}
    675. 

  675. 					}
    676. 

  676. 

  677. 					array_push($stk, array(	'what'  => SERVICES_JSON_SLICE,
    678. 

  678. 								'where' => 0,
    679. 

  679. 								'delim' => false));
    680. 

  680. 

  681. 					$chrs = substr($str, 1, -1);
    682. 

  682. 					$chrs = $this->reduce_string($chrs);
    683. 

  683. 

  684. 					if ($chrs == '') {
    685. 

  685. 						if (reset($stk) == SERVICES_JSON_IN_ARR) {
    686. 

  686. 							return $arr;
    687. 

  687. 

  688. 						} else {
    689. 

  689. 							return $obj;
    690. 

  690. 

  691. 						}
    692. 

  692. 					}
    693. 

  693. 

  694. 					//print("\nparsing {$chrs}\n");
    695. 

  695. 

  696. 					$strlen_chrs = strlen($chrs);
    697. 

  697. 

  698. 					for ($c = 0; $c <= $strlen_chrs; ++$c) {
    699. 

  699. 

  700. 						$top = end($stk);
    701. 

  701. 						$substr_chrs_c_2 = substr($chrs, $c, 2);
    702. 

  702. 

  703. 						if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) {
    704. 

  704. 							// found a comma that is not inside a string, array, etc.,
    705. 

  705. 							// OR we've reached the end of the character list
    706. 

  706. 							$slice = substr($chrs, $top['where'], ($c - $top['where']));
    707. 

  707. 							array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
    708. 

  708. 							//print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
    709. 

  709. 

  710. 							if (reset($stk) == SERVICES_JSON_IN_ARR) {
    711. 

  711. 								// we are in an array, so just push an element onto the stack
    712. 

  712. 								array_push($arr, $this->decode($slice));
    713. 

  713. 

  714. 							} elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
    715. 

  715. 								// we are in an object, so figure
    716. 

  716. 								// out the property name and set an
    717. 

  717. 								// element in an associative array,
    718. 

  718. 								// for now
    719. 

  719. 								$parts = array();
    720. 

  720. 

  721. 								if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
    722. 

  722. 									// "name":value pair
    723. 

  723. 									$key = $this->decode($parts[1]);
    724. 

  724. 									$val = $this->decode($parts[2]);
    725. 

  725. 

  726. 									if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
    727. 

  727. 										$obj[$key] = $val;
    728. 

  728. 									} else {
    729. 

  729. 										$obj->$key = $val;
    730. 

  730. 									}
    731. 

  731. 								} elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
    732. 

  732. 									// name:value pair, where name is unquoted
    733. 

  733. 									$key = $parts[1];
    734. 

  734. 									$val = $this->decode($parts[2]);
    735. 

  735. 

  736. 									if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
    737. 

  737. 										$obj[$key] = $val;
    738. 

  738. 									} else {
    739. 

  739. 										$obj->$key = $val;
    740. 

  740. 									}
    741. 

  741. 								}
    742. 

  742. 

  743. 							}
    744. 

  744. 

  745. 						} elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {
    746. 

  746. 							// found a quote, and we are not inside a string
    747. 

  747. 							array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c}));
    748. 

  748. 							//print("Found start of string at {$c}\n");
    749. 

  749. 

  750. 						} elseif (($chrs{$c} == $top['delim']) &&
    751. 

  751. 								 ($top['what'] == SERVICES_JSON_IN_STR) &&
    752. 

  752. 								 (($chrs{$c - 1} != '\\') ||
    753. 

  753. 								 ($chrs{$c - 1} == '\\' && $chrs{$c - 2} == '\\'))) {
    754. 

  754. 							// found a quote, we're in a string, and it's not escaped
    755. 

  755. 							array_pop($stk);
    756. 

  756. 							//print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
    757. 

  757. 

  758. 						} elseif (($chrs{$c} == '[') &&
    759. 

  759. 								 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
    760. 

  760. 							// found a left-bracket, and we are in an array, object, or slice
    761. 

  761. 							array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false));
    762. 

  762. 							//print("Found start of array at {$c}\n");
    763. 

  763. 

  764. 						} elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) {
    765. 

  765. 							// found a right-bracket, and we're in an array
    766. 

  766. 							array_pop($stk);
    767. 

  767. 							//print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
    768. 

  768. 

  769. 						} elseif (($chrs{$c} == '{') &&
    770. 

  770. 								 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
    771. 

  771. 							// found a left-brace, and we are in an array, object, or slice
    772. 

  772. 							array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false));
    773. 

  773. 							//print("Found start of object at {$c}\n");
    774. 

  774. 

  775. 						} elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) {
    776. 

  776. 							// found a right-brace, and we're in an object
    777. 

  777. 							array_pop($stk);
    778. 

  778. 							//print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
    779. 

  779. 

  780. 						} elseif (($substr_chrs_c_2 == '/*') &&
    781. 

  781. 								 in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
    782. 

  782. 							// found a comment start, and we are in an array, object, or slice
    783. 

  783. 							array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false));
    784. 

  784. 							$c++;
    785. 

  785. 							//print("Found start of comment at {$c}\n");
    786. 

  786. 

  787. 						} elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) {
    788. 

  788. 							// found a comment end, and we're in one now
    789. 

  789. 							array_pop($stk);
    790. 

  790. 							$c++;
    791. 

  791. 

  792. 							for ($i = $top['where']; $i <= $c; ++$i)
    793. 

  793. 								$chrs = substr_replace($chrs, ' ', $i, 1);
    794. 

  794. 

  795. 							//print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
    796. 

  796. 

  797. 						}
    798. 

  798. 

  799. 					}
    800. 

  800. 

  801. 					if (reset($stk) == SERVICES_JSON_IN_ARR) {
    802. 

  802. 						return $arr;
    803. 

  803. 

  804. 					} elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
    805. 

  805. 						return $obj;
    806. 

  806. 

  807. 					}
    808. 

  808. 

  809. 				}
    810. 

  810. 		}
    811. 

  811. 	}
    812. 

  812. 

  813. 	/**
    814. 

  814. 	 * @todo Ultimately, this should just call PEAR::isError()
    815. 

  815. 	 */
    816. 

  816. 	function isError($data, $code = null)
    817. 

  817. 	{
    818. 

  818. 		if (class_exists('pear')) {
    819. 

  819. 			return PEAR::isError($data, $code);
    820. 

  820. 		} elseif (is_object($data) && (get_class($data) == 'services_json_error' ||
    821. 

  821. 				is_subclass_of($data, 'services_json_error'))) {
    822. 

  822. 			return true;
    823. 

  823. 		}
    824. 

  824. 

  825. 		return false;
    826. 

  826. 	}
    827. 

  827. }
    828. 

  828. 

  829. 

  830. // Hide the PEAR_Error variant from Doxygen
    831. 

  831. /// @cond
    832. 

  832. if (class_exists('PEAR_Error')) {
    833. 

  833. 

  834. 	/**
    835. 

  835. 	 * @ingroup API
    836. 

  836. 	 */
    837. 

  837. 	class Services_JSON_Error extends PEAR_Error
    838. 

  838. 	{
    839. 

  839. 		function Services_JSON_Error($message = 'unknown error', $code = null,
    840. 

  840. 						$mode = null, $options = null, $userinfo = null)
    841. 

  841. 		{
    842. 

  842. 			parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
    843. 

  843. 		}
    844. 

  844. 	}
    845. 

  845. 

  846. } else {
    847. 

  847. /// @endcond
    848. 

  848. 

  849. 	/**
    850. 

  850. 	 * @todo Ultimately, this class shall be descended from PEAR_Error
    851. 

  851. 	 * @ingroup API
    852. 

  852. 	 */
    853. 

  853. 	class Services_JSON_Error
    854. 

  854. 	{
    855. 

  855. 		function Services_JSON_Error($message = 'unknown error', $code = null,
    856. 

  856. 						$mode = null, $options = null, $userinfo = null)
    857. 

  857. 		{
    858. 

  858. 

  859. 		}
    860. 

  860. 	}
    861. 

  861. }
    862. 

  862.