| 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; |
| 863 | | ?> |