<?php
/**
- * Simple wrapper for json_encode and json_decode that falls back on Services_JSON class.
+ * Wrapper for json_encode and json_decode.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* @file
*/
-require_once __DIR__ . '/Services_JSON.php';
-
/**
* JSON formatter wrapper class
*/
class FormatJson {
+ /**
+ * Skip escaping most characters above U+007F for readability and compactness.
+ * This encoding option saves 3 to 8 bytes (uncompressed) for each such character;
+ * however, it could break compatibility with systems that incorrectly handle UTF-8.
+ *
+ * @since 1.21
+ */
+ const UTF8_OK = 1;
+
+ /**
+ * Skip escaping the characters '<', '>', and '&', which have special meanings in
+ * HTML and XML.
+ *
+ * @warning Do not use this option for JSON that could end up in inline scripts.
+ * - HTML5, §4.3.1.2 Restrictions for contents of script elements
+ * - XML 1.0 (5th Ed.), §2.4 Character Data and Markup
+ *
+ * @since 1.21
+ */
+ const XMLMETA_OK = 2;
+
+ /**
+ * Skip escaping as many characters as reasonably possible.
+ *
+ * @warning When generating inline script blocks, use FormatJson::UTF8_OK instead.
+ *
+ * @since 1.21
+ */
+ const ALL_OK = 3;
+
+ /**
+ * Characters problematic in JavaScript and their corresponding escape sequences.
+ *
+ * @note These are listed in ECMA-262 (5.1 Ed.), §7.3 Line Terminators along with U+000A (LF)
+ * and U+000D (CR). However, PHP already escapes LF and CR according to RFC 4627.
+ */
+ private static $badChars = array(
+ "\xe2\x80\xa8" => '\u2028', // LINE SEPARATOR
+ "\xe2\x80\xa9" => '\u2029', // PARAGRAPH SEPARATOR
+ );
+
/**
* Returns the JSON representation of a value.
*
- * @param $value Mixed: the value being encoded. Can be any type except a resource.
- * @param $pretty Boolean: If true, adds non-significant whitespace to improve readability.
+ * @note Empty arrays are encoded as numeric arrays, not as objects, so cast any associative
+ * array that might be empty to an object before encoding it.
*
- * @return string
+ * @note In pre-1.21 versions of MediaWiki, using this function for generating inline script
+ * blocks may result in an XSS vulnerability, and quite likely will in XML documents
+ * (cf. FormatJson::XMLMETA_OK). Use Xml::encodeJsVar() instead in such cases.
+ *
+ * @param mixed $value The value to encode. Can be any type except a resource.
+ * @param bool $pretty If true, add non-significant whitespace to improve readability.
+ * @param int $escaping Bitfield consisting of _OK class constants
+ * @return string|bool: String if successful; false upon failure
*/
- public static function encode( $value, $pretty = false ) {
- if ( !function_exists( 'json_encode' ) || ( $pretty && version_compare( PHP_VERSION, '5.4.0', '<' ) ) ) {
- $json = new Services_JSON();
- return $json->encode( $value, $pretty );
- } else {
- return json_encode( $value, $pretty ? JSON_PRETTY_PRINT : 0 );
+ public static function encode( $value, $pretty = false, $escaping = 0 ) {
+ if ( version_compare( PHP_VERSION, '5.4.0', '<' ) ) {
+ return self::encode53( $value, $pretty, $escaping );
}
+ return self::encode54( $value, $pretty, $escaping );
}
/**
* Decodes a JSON string.
*
- * @param string $value the json string being decoded.
- * @param $assoc Boolean: when true, returned objects will be converted into associative arrays.
+ * @param string $value The JSON string being decoded
+ * @param bool $assoc When true, returned objects will be converted into associative arrays.
*
- * @return Mixed: the value encoded in json in appropriate PHP type.
- * Values true, false and null (case-insensitive) are returned as true, false
- * and "&null;" respectively. "&null;" is returned if the json cannot be
+ * @return mixed: the value encoded in JSON in appropriate PHP type.
+ * Values `"true"`, `"false"`, and `"null"` (case-insensitive) are returned as `true`, `false`
+ * and `null` respectively. `null` is returned if the JSON cannot be
* decoded or if the encoded data is deeper than the recursion limit.
*/
public static function decode( $value, $assoc = false ) {
- if ( !function_exists( 'json_decode' ) ) {
- $json = $assoc ? new Services_JSON( SERVICES_JSON_LOOSE_TYPE ) :
- new Services_JSON();
- $jsonDec = $json->decode( $value );
- return $jsonDec;
- } else {
- return json_decode( $value, $assoc );
+ return json_decode( $value, $assoc );
+ }
+
+ /**
+ * JSON encoder wrapper for PHP >= 5.4, which supports useful encoding options.
+ *
+ * @param mixed $value
+ * @param bool $pretty
+ * @param int $escaping
+ * @return string|bool
+ */
+ private static function encode54( $value, $pretty, $escaping ) {
+ // PHP escapes '/' to prevent breaking out of inline script blocks using '</script>',
+ // which is hardly useful when '<' and '>' are escaped, and such escaping negatively
+ // impacts the human readability of URLs and similar strings.
+ $options = JSON_UNESCAPED_SLASHES;
+ $options |= $pretty ? JSON_PRETTY_PRINT : 0;
+ $options |= ( $escaping & self::UTF8_OK ) ? JSON_UNESCAPED_UNICODE : 0;
+ $options |= ( $escaping & self::XMLMETA_OK ) ? 0 : ( JSON_HEX_TAG | JSON_HEX_AMP );
+ $json = json_encode( $value, $options );
+ if ( $json === false ) {
+ return false;
}
+ return ( $escaping & self::UTF8_OK ) ? strtr( $json, self::$badChars ) : $json;
}
+ /**
+ * JSON encoder wrapper for PHP 5.3, which lacks native support for some encoding options.
+ * Therefore, the missing options are implemented here purely in PHP code.
+ *
+ * @param mixed $value
+ * @param bool $pretty
+ * @param int $escaping
+ * @return string|bool
+ */
+ private static function encode53( $value, $pretty, $escaping ) {
+ $options = ( $escaping & self::XMLMETA_OK ) ? 0 : ( JSON_HEX_TAG | JSON_HEX_AMP );
+ $json = json_encode( $value, $options );
+ if ( $json === false ) {
+ return false;
+ }
+ $json = str_replace( '\\/', '/', $json ); // emulate JSON_UNESCAPED_SLASHES
+ if ( $escaping & self::UTF8_OK ) {
+ // JSON hex escape sequences follow the format \uDDDD, where DDDD is four hex digits
+ // indicating the equivalent UTF-16 code unit's value. To most efficiently unescape
+ // them, we exploit the JSON extension's built-in decoder.
+ // * We escape the input a second time, so any such sequence becomes \\uDDDD.
+ // * To avoid interpreting escape sequences that were in the original input,
+ // each double-escaped backslash (\\\\) is replaced with \\\u005c.
+ // * We strip one of the backslashes from each of the escape sequences to unescape.
+ // * Then the JSON decoder can perform the actual unescaping.
+ $doubled = str_replace( "\\\\\\\\", "\\\\\\u005c", json_encode( $json ) );
+ $json = json_decode( preg_replace( "/\\\\\\\\u(?!00[0-7])/", "\\\\u", $doubled ) );
+ $json = strtr( $json, self::$badChars );
+ }
+ return $pretty ? self::prettyPrint( $json ) : $json;
+ }
+
+ /**
+ * Adds non-significant whitespace to an existing JSON representation of an object.
+ * Only needed for PHP < 5.4, which lacks the JSON_PRETTY_PRINT option.
+ *
+ * @param string $json
+ * @return string
+ */
+ private static function prettyPrint( $json ) {
+ $buf = '';
+ $indent = 0;
+ $json = str_replace( '\"', "\x01", $json );
+ for ( $i = 0, $n = strlen( $json ); $i < $n; $i += $skip ) {
+ $skip = 1;
+ switch ( $json[$i] ) {
+ case ':':
+ $buf .= ': ';
+ break;
+ case '[':
+ case '{':
+ $indent++; // falls through
+ case ',':
+ $buf .= $json[$i] . "\n" . str_repeat( ' ', $indent );
+ break;
+ case ']':
+ case '}':
+ $indent--;
+ $buf .= "\n" . str_repeat( ' ', $indent ) . $json[$i];
+ break;
+ case '"':
+ $skip = strcspn( $json, '"', $i + 1 ) + 2;
+ $buf .= substr( $json, $i, $skip );
+ break;
+ default:
+ $skip = strcspn( $json, ',]}"', $i + 1 ) + 1;
+ $buf .= substr( $json, $i, $skip );
+ }
+ }
+ return str_replace( "\x01", '\"', preg_replace( '/ +$/m', '', $buf ) );
+ }
}
+++ /dev/null
-<?php
-/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
-
-/**
-* Converts to and from JSON format.
-*
-* JSON (JavaScript Object Notation) is a lightweight data-interchange
-* format. It is easy for humans to read and write. It is easy for machines
-* to parse and generate. It is based on a subset of the JavaScript
-* Programming Language, Standard ECMA-262 3rd Edition - December 1999.
-* This feature can also be found in Python. JSON is a text format that is
-* completely language independent but uses conventions that are familiar
-* to programmers of the C-family of languages, including C, C++, C#, Java,
-* JavaScript, Perl, TCL, and many others. These properties make JSON an
-* ideal data-interchange language.
-*
-* This package provides a simple encoder and decoder for JSON notation. It
-* is intended for use with client-side Javascript applications that make
-* use of HTTPRequest to perform server communication functions - data can
-* be encoded into JSON notation for use in a client-side javascript, or
-* decoded from incoming Javascript requests. JSON format is native to
-* Javascript, and can be directly eval()'ed with no further parsing
-* overhead
-*
-* All strings should be in ASCII or UTF-8 format!
-*
-* LICENSE: Redistribution and use in source and binary forms, with or
-* without modification, are permitted provided that the following
-* conditions are met: Redistributions of source code must retain the
-* above copyright notice, this list of conditions and the following
-* disclaimer. Redistributions in binary form must reproduce the above
-* copyright notice, this list of conditions and the following disclaimer
-* in the documentation and/or other materials provided with the
-* distribution.
-*
-* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
-* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
-* NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
-* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
-* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
-* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
-* DAMAGE.
-*
-* @file
-* @ingroup API
-* @author Michal Migurski <mike-json@teczno.com>
-* @author Matt Knapp <mdknapp[at]gmail[dot]com>
-* @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com>
-* @copyright 2005 Michal Migurski
-* @version CVS: $Id$
-* @license http://www.opensource.org/licenses/bsd-license.php
-* @see http://pear.php.net/pepr/pepr-proposal-show.php?id=198
-*/
-
-/**
-* Marker constant for Services_JSON::decode(), used to flag stack state
-*/
-define('SERVICES_JSON_SLICE', 1);
-
-/**
-* Marker constant for Services_JSON::decode(), used to flag stack state
-*/
-define('SERVICES_JSON_IN_STR', 2);
-
-/**
-* Marker constant for Services_JSON::decode(), used to flag stack state
-*/
-define('SERVICES_JSON_IN_ARR', 3);
-
-/**
-* Marker constant for Services_JSON::decode(), used to flag stack state
-*/
-define('SERVICES_JSON_IN_OBJ', 4);
-
-/**
-* Marker constant for Services_JSON::decode(), used to flag stack state
-*/
-define('SERVICES_JSON_IN_CMT', 5);
-
-/**
-* Behavior switch for Services_JSON::decode()
-*/
-define('SERVICES_JSON_LOOSE_TYPE', 16);
-
-/**
-* Behavior switch for Services_JSON::decode()
-*/
-define('SERVICES_JSON_SUPPRESS_ERRORS', 32);
-
-/**
- * Converts to and from JSON format.
- *
- * Brief example of use:
- *
- * <code>
- * // create a new instance of Services_JSON
- * $json = new Services_JSON();
- *
- * // convert a complex value to JSON notation, and send it to the browser
- * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4)));
- * $output = $json->encode($value);
- *
- * print($output);
- * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]]
- *
- * // accept incoming POST data, assumed to be in JSON notation
- * $input = file_get_contents('php://input', 1000000);
- * $value = $json->decode($input);
- * </code>
- *
- * @ingroup API
- */
-class Services_JSON
-{
- /**
- * constructs a new JSON instance
- *
- * @param $use Integer: object behavior flags; combine with boolean-OR
- *
- * possible values:
- * - SERVICES_JSON_LOOSE_TYPE: loose typing.
- * "{...}" syntax creates associative arrays
- * instead of objects in decode().
- * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression.
- * Values which can't be encoded (e.g. resources)
- * appear as NULL instead of throwing errors.
- * By default, a deeply-nested resource will
- * bubble up with an error, so all return values
- * from encode() should be checked with isError()
- */
- function __construct($use = 0)
- {
- $this->use = $use;
- }
-
- private static $mHavePear = null;
- /**
- * Returns cached result of class_exists('pear'), to avoid calling AutoLoader numerous times
- * in cases when PEAR is not present.
- * @return boolean
- */
- private static function pearInstalled() {
- if ( self::$mHavePear === null ) {
- self::$mHavePear = class_exists( 'pear' );
- }
- return self::$mHavePear;
- }
-
- /**
- * convert a string from one UTF-16 char to one UTF-8 char
- *
- * Normally should be handled by mb_convert_encoding, but
- * provides a slower PHP-only method for installations
- * that lack the multibyte string extension.
- *
- * @param string $utf16 UTF-16 character
- * @return String: UTF-8 character
- * @access private
- */
- function utf162utf8($utf16)
- {
- // oh please oh please oh please oh please oh please
- if(function_exists('mb_convert_encoding')) {
- return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');
- }
-
- $bytes = (ord($utf16[0]) << 8) | ord($utf16[1]);
-
- switch(true) {
- case ((0x7F & $bytes) == $bytes):
- // this case should never be reached, because we are in ASCII range
- // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- return chr(0x7F & $bytes);
-
- case (0x07FF & $bytes) == $bytes:
- // return a 2-byte UTF-8 character
- // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- return chr(0xC0 | (($bytes >> 6) & 0x1F))
- . chr(0x80 | ($bytes & 0x3F));
-
- case (0xFC00 & $bytes) == 0xD800 && strlen($utf16) >= 4 && (0xFC & ord($utf16[2])) == 0xDC:
- // return a 4-byte UTF-8 character
- $char = ((($bytes & 0x03FF) << 10)
- | ((ord($utf16[2]) & 0x03) << 8)
- | ord($utf16[3]));
- $char += 0x10000;
- return chr(0xF0 | (($char >> 18) & 0x07))
- . chr(0x80 | (($char >> 12) & 0x3F))
- . chr(0x80 | (($char >> 6) & 0x3F))
- . chr(0x80 | ($char & 0x3F));
-
- case (0xFFFF & $bytes) == $bytes:
- // return a 3-byte UTF-8 character
- // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- return chr(0xE0 | (($bytes >> 12) & 0x0F))
- . chr(0x80 | (($bytes >> 6) & 0x3F))
- . chr(0x80 | ($bytes & 0x3F));
- }
-
- // ignoring UTF-32 for now, sorry
- return '';
- }
-
- /**
- * convert a string from one UTF-8 char to one UTF-16 char
- *
- * Normally should be handled by mb_convert_encoding, but
- * provides a slower PHP-only method for installations
- * that lack the multibyte string extension.
- *
- * @param string $utf8 UTF-8 character
- * @return String: UTF-16 character
- * @access private
- */
- function utf82utf16($utf8)
- {
- // oh please oh please oh please oh please oh please
- if(function_exists('mb_convert_encoding')) {
- return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
- }
-
- switch(strlen($utf8)) {
- case 1:
- // this case should never be reached, because we are in ASCII range
- // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- return $utf8;
-
- case 2:
- // return a UTF-16 character from a 2-byte UTF-8 char
- // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- return chr(0x07 & (ord($utf8[0]) >> 2))
- . chr((0xC0 & (ord($utf8[0]) << 6))
- | (0x3F & ord($utf8[1])));
-
- case 3:
- // return a UTF-16 character from a 3-byte UTF-8 char
- // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- return chr((0xF0 & (ord($utf8[0]) << 4))
- | (0x0F & (ord($utf8[1]) >> 2)))
- . chr((0xC0 & (ord($utf8[1]) << 6))
- | (0x7F & ord($utf8[2])));
-
- case 4:
- // return a UTF-16 surrogate pair from a 4-byte UTF-8 char
- if(ord($utf8[0]) > 0xF4) return ''; # invalid
- $char = ((0x1C0000 & (ord($utf8[0]) << 18))
- | (0x03F000 & (ord($utf8[1]) << 12))
- | (0x000FC0 & (ord($utf8[2]) << 6))
- | (0x00003F & ord($utf8[3])));
- if($char > 0x10FFFF) return ''; # invalid
- $char -= 0x10000;
- return chr(0xD8 | (($char >> 18) & 0x03))
- . chr(($char >> 10) & 0xFF)
- . chr(0xDC | (($char >> 8) & 0x03))
- . chr($char & 0xFF);
- }
-
- // ignoring UTF-32 for now, sorry
- return '';
- }
-
- /**
- * encodes an arbitrary variable into JSON format
- *
- * @param $var Mixed: any number, boolean, string, array, or object to be encoded.
- * see argument 1 to Services_JSON() above for array-parsing behavior.
- * if var is a string, note that encode() always expects it
- * to be in ASCII or UTF-8 format!
- * @param $pretty Boolean: pretty-print output with indents and newlines
- *
- * @return mixed JSON string representation of input var or an error if a problem occurs
- * @access public
- */
- function encode($var, $pretty=false)
- {
- $this->indent = 0;
- $this->pretty = $pretty;
- $this->nameValSeparator = $pretty ? ': ' : ':';
- return $this->encode2($var);
- }
-
- /**
- * encodes an arbitrary variable into JSON format
- *
- * @param $var Mixed: any number, boolean, string, array, or object to be encoded.
- * see argument 1 to Services_JSON() above for array-parsing behavior.
- * if var is a string, note that encode() always expects it
- * to be in ASCII or UTF-8 format!
- *
- * @return mixed JSON string representation of input var or an error if a problem occurs
- * @access private
- */
- function encode2($var)
- {
- if ($this->pretty) {
- $close = "\n" . str_repeat("\t", $this->indent);
- $open = $close . "\t";
- $mid = ',' . $open;
- }
- else {
- $open = $close = '';
- $mid = ',';
- }
-
- switch (gettype($var)) {
- case 'boolean':
- return $var ? 'true' : 'false';
-
- case 'NULL':
- return 'null';
-
- case 'integer':
- return (int) $var;
-
- case 'double':
- case 'float':
- return (float) $var;
-
- case 'string':
- // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
- $ascii = '';
- $strlen_var = strlen($var);
-
- /*
- * Iterate over every character in the string,
- * escaping with a slash or encoding to UTF-8 where necessary
- */
- for ($c = 0; $c < $strlen_var; ++$c) {
-
- $ord_var_c = ord($var[$c]);
-
- switch (true) {
- case $ord_var_c == 0x08:
- $ascii .= '\b';
- break;
- case $ord_var_c == 0x09:
- $ascii .= '\t';
- break;
- case $ord_var_c == 0x0A:
- $ascii .= '\n';
- break;
- case $ord_var_c == 0x0C:
- $ascii .= '\f';
- break;
- case $ord_var_c == 0x0D:
- $ascii .= '\r';
- break;
-
- case $ord_var_c == 0x22:
- case $ord_var_c == 0x2F:
- case $ord_var_c == 0x5C:
- // double quote, slash, slosh
- $ascii .= '\\'.$var[$c];
- break;
-
- case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):
- // characters U-00000000 - U-0000007F (same as ASCII)
- $ascii .= $var[$c];
- break;
-
- case (($ord_var_c & 0xE0) == 0xC0):
- // characters U-00000080 - U-000007FF, mask 110XXXXX
- // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- $char = pack('C*', $ord_var_c, ord($var[$c + 1]));
- $c += 1;
- $utf16 = $this->utf82utf16($char);
- $ascii .= sprintf('\u%04s', bin2hex($utf16));
- break;
-
- case (($ord_var_c & 0xF0) == 0xE0):
- // characters U-00000800 - U-0000FFFF, mask 1110XXXX
- // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- $char = pack('C*', $ord_var_c,
- ord($var[$c + 1]),
- ord($var[$c + 2]));
- $c += 2;
- $utf16 = $this->utf82utf16($char);
- $ascii .= sprintf('\u%04s', bin2hex($utf16));
- break;
-
- case (($ord_var_c & 0xF8) == 0xF0):
- // characters U-00010000 - U-001FFFFF, mask 11110XXX
- // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- // These will always return a surrogate pair
- $char = pack('C*', $ord_var_c,
- ord($var[$c + 1]),
- ord($var[$c + 2]),
- ord($var[$c + 3]));
- $c += 3;
- $utf16 = $this->utf82utf16($char);
- if($utf16 == '') {
- $ascii .= '\ufffd';
- } else {
- $utf16 = str_split($utf16, 2);
- $ascii .= sprintf('\u%04s\u%04s', bin2hex($utf16[0]), bin2hex($utf16[1]));
- }
- break;
- }
- }
-
- return '"'.$ascii.'"';
-
- case 'array':
- /*
- * As per JSON spec if any array key is not an integer
- * we must treat the the whole array as an object. We
- * also try to catch a sparsely populated associative
- * array with numeric keys here because some JS engines
- * will create an array with empty indexes up to
- * max_index which can cause memory issues and because
- * the keys, which may be relevant, will be remapped
- * otherwise.
- *
- * As per the ECMA and JSON specification an object may
- * have any string as a property. Unfortunately due to
- * a hole in the ECMA specification if the key is a
- * ECMA reserved word or starts with a digit the
- * parameter is only accessible using ECMAScript's
- * bracket notation.
- */
-
- // treat as a JSON object
- if (is_array($var) && count($var) && (array_keys($var) !== range(0, count($var) - 1))) {
- $this->indent++;
- $properties = array_map(array($this, 'name_value'),
- array_keys($var),
- array_values($var));
- $this->indent--;
-
- foreach($properties as $property) {
- if($this->isError($property)) {
- return $property;
- }
- }
-
- return '{' . $open . join($mid, $properties) . $close . '}';
- }
-
- // treat it like a regular array
- $this->indent++;
- $elements = array_map(array($this, 'encode2'), $var);
- $this->indent--;
-
- foreach($elements as $element) {
- if($this->isError($element)) {
- return $element;
- }
- }
-
- return '[' . $open . join($mid, $elements) . $close . ']';
-
- case 'object':
- $vars = get_object_vars($var);
-
- $this->indent++;
- $properties = array_map(array($this, 'name_value'),
- array_keys($vars),
- array_values($vars));
- $this->indent--;
-
- foreach($properties as $property) {
- if($this->isError($property)) {
- return $property;
- }
- }
-
- return '{' . $open . join($mid, $properties) . $close . '}';
-
- default:
- return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
- ? 'null'
- : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string");
- }
- }
-
- /**
- * array-walking function for use in generating JSON-formatted name-value pairs
- *
- * @param string $name name of key to use
- * @param $value Mixed: reference to an array element to be encoded
- *
- * @return String: JSON-formatted name-value pair, like '"name":value'
- * @access private
- */
- function name_value($name, $value)
- {
- $encoded_value = $this->encode2($value);
-
- if($this->isError($encoded_value)) {
- return $encoded_value;
- }
-
- return $this->encode2(strval($name)) . $this->nameValSeparator . $encoded_value;
- }
-
- /**
- * reduce a string by removing leading and trailing comments and whitespace
- *
- * @param string $str string value to strip of comments and whitespace
- *
- * @return String: string value stripped of comments and whitespace
- * @access private
- */
- function reduce_string($str)
- {
- $str = preg_replace(array(
-
- // eliminate single line comments in '// ...' form
- '#^\s*//(.+)$#m',
-
- // eliminate multi-line comments in '/* ... */' form, at start of string
- '#^\s*/\*(.+)\*/#Us',
-
- // eliminate multi-line comments in '/* ... */' form, at end of string
- '#/\*(.+)\*/\s*$#Us'
-
- ), '', $str);
-
- // eliminate extraneous space
- return trim($str);
- }
-
- /**
- * decodes a JSON string into appropriate variable
- *
- * @param string $str JSON-formatted string
- *
- * @return mixed number, boolean, string, array, or object
- * corresponding to given JSON input string.
- * See argument 1 to Services_JSON() above for object-output behavior.
- * Note that decode() always returns strings
- * in ASCII or UTF-8 format!
- * @access public
- */
- function decode($str)
- {
- $str = $this->reduce_string($str);
-
- switch (strtolower($str)) {
- case 'true':
- return true;
-
- case 'false':
- return false;
-
- case 'null':
- return null;
-
- default:
- $m = array();
-
- if (is_numeric($str)) {
- // Lookie-loo, it's a number
-
- // This would work on its own, but I'm trying to be
- // good about returning integers where appropriate:
- // return (float)$str;
-
- // Return float or int, as appropriate
- return ((float)$str == (integer)$str)
- ? (integer)$str
- : (float)$str;
-
- } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) {
- // STRINGS RETURNED IN UTF-8 FORMAT
- $delim = substr($str, 0, 1);
- $chrs = substr($str, 1, -1);
- $utf8 = '';
- $strlen_chrs = strlen($chrs);
-
- for ($c = 0; $c < $strlen_chrs; ++$c) {
-
- $substr_chrs_c_2 = substr($chrs, $c, 2);
- $ord_chrs_c = ord($chrs[$c]);
-
- switch (true) {
- case $substr_chrs_c_2 == '\b':
- $utf8 .= chr(0x08);
- ++$c;
- break;
- case $substr_chrs_c_2 == '\t':
- $utf8 .= chr(0x09);
- ++$c;
- break;
- case $substr_chrs_c_2 == '\n':
- $utf8 .= chr(0x0A);
- ++$c;
- break;
- case $substr_chrs_c_2 == '\f':
- $utf8 .= chr(0x0C);
- ++$c;
- break;
- case $substr_chrs_c_2 == '\r':
- $utf8 .= chr(0x0D);
- ++$c;
- break;
-
- case $substr_chrs_c_2 == '\\"':
- case $substr_chrs_c_2 == '\\\'':
- case $substr_chrs_c_2 == '\\\\':
- case $substr_chrs_c_2 == '\\/':
- if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||
- ($delim == "'" && $substr_chrs_c_2 != '\\"')) {
- $utf8 .= $chrs[++$c];
- }
- break;
-
- case preg_match('/\\\uD[89AB][0-9A-F]{2}\\\uD[C-F][0-9A-F]{2}/i', substr($chrs, $c, 12)):
- // escaped unicode surrogate pair
- $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
- . chr(hexdec(substr($chrs, ($c + 4), 2)))
- . chr(hexdec(substr($chrs, ($c + 8), 2)))
- . chr(hexdec(substr($chrs, ($c + 10), 2)));
- $utf8 .= $this->utf162utf8($utf16);
- $c += 11;
- break;
-
- case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):
- // single, escaped unicode character
- $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))
- . chr(hexdec(substr($chrs, ($c + 4), 2)));
- $utf8 .= $this->utf162utf8($utf16);
- $c += 5;
- break;
-
- case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):
- $utf8 .= $chrs[$c];
- break;
-
- case ($ord_chrs_c & 0xE0) == 0xC0:
- // characters U-00000080 - U-000007FF, mask 110XXXXX
- //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- $utf8 .= substr($chrs, $c, 2);
- ++$c;
- break;
-
- case ($ord_chrs_c & 0xF0) == 0xE0:
- // characters U-00000800 - U-0000FFFF, mask 1110XXXX
- // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- $utf8 .= substr($chrs, $c, 3);
- $c += 2;
- break;
-
- case ($ord_chrs_c & 0xF8) == 0xF0:
- // characters U-00010000 - U-001FFFFF, mask 11110XXX
- // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- $utf8 .= substr($chrs, $c, 4);
- $c += 3;
- break;
-
- case ($ord_chrs_c & 0xFC) == 0xF8:
- // characters U-00200000 - U-03FFFFFF, mask 111110XX
- // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- $utf8 .= substr($chrs, $c, 5);
- $c += 4;
- break;
-
- case ($ord_chrs_c & 0xFE) == 0xFC:
- // characters U-04000000 - U-7FFFFFFF, mask 1111110X
- // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
- $utf8 .= substr($chrs, $c, 6);
- $c += 5;
- break;
-
- }
-
- }
-
- return $utf8;
-
- } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {
- // array, or object notation
-
- if ($str[0] == '[') {
- $stk = array(SERVICES_JSON_IN_ARR);
- $arr = array();
- } else {
- if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
- $stk = array(SERVICES_JSON_IN_OBJ);
- $obj = array();
- } else {
- $stk = array(SERVICES_JSON_IN_OBJ);
- $obj = new stdClass();
- }
- }
-
- array_push($stk, array( 'what' => SERVICES_JSON_SLICE,
- 'where' => 0,
- 'delim' => false));
-
- $chrs = substr($str, 1, -1);
- $chrs = $this->reduce_string($chrs);
-
- if ($chrs == '') {
- if (reset($stk) == SERVICES_JSON_IN_ARR) {
- return $arr;
-
- } else {
- return $obj;
-
- }
- }
-
- //print("\nparsing {$chrs}\n");
-
- $strlen_chrs = strlen($chrs);
-
- for ($c = 0; $c <= $strlen_chrs; ++$c) {
-
- $top = end($stk);
- $substr_chrs_c_2 = substr($chrs, $c, 2);
-
- if (($c == $strlen_chrs) || (($chrs[$c] == ',') && ($top['what'] == SERVICES_JSON_SLICE))) {
- // found a comma that is not inside a string, array, etc.,
- // OR we've reached the end of the character list
- $slice = substr($chrs, $top['where'], ($c - $top['where']));
- array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false));
- //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
-
- if (reset($stk) == SERVICES_JSON_IN_ARR) {
- // we are in an array, so just push an element onto the stack
- array_push($arr, $this->decode($slice));
-
- } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
- // we are in an object, so figure
- // out the property name and set an
- // element in an associative array,
- // for now
- $parts = array();
-
- if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
- // "name":value pair
- $key = $this->decode($parts[1]);
- $val = $this->decode($parts[2]);
-
- if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
- $obj[$key] = $val;
- } else {
- $obj->$key = $val;
- }
- } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {
- // name:value pair, where name is unquoted
- $key = $parts[1];
- $val = $this->decode($parts[2]);
-
- if ($this->use & SERVICES_JSON_LOOSE_TYPE) {
- $obj[$key] = $val;
- } else {
- $obj->$key = $val;
- }
- }
-
- }
-
- } elseif ((($chrs[$c] == '"') || ($chrs[$c] == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {
- // found a quote, and we are not inside a string
- array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs[$c]));
- //print("Found start of string at {$c}\n");
-
- } elseif (($chrs[$c] == $top['delim']) &&
- ($top['what'] == SERVICES_JSON_IN_STR) &&
- (($chrs[$c - 1] != '\\') ||
- ($chrs[$c - 1] == '\\' && $chrs[$c - 2] == '\\'))) {
- // found a quote, we're in a string, and it's not escaped
- array_pop($stk);
- //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n");
-
- } elseif (($chrs[$c] == '[') &&
- in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
- // found a left-bracket, and we are in an array, object, or slice
- array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false));
- //print("Found start of array at {$c}\n");
-
- } elseif (($chrs[$c] == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) {
- // found a right-bracket, and we're in an array
- array_pop($stk);
- //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
-
- } elseif (($chrs[$c] == '{') &&
- in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
- // found a left-brace, and we are in an array, object, or slice
- array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false));
- //print("Found start of object at {$c}\n");
-
- } elseif (($chrs[$c] == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) {
- // found a right-brace, and we're in an object
- array_pop($stk);
- //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
-
- } elseif (($substr_chrs_c_2 == '/*') &&
- in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {
- // found a comment start, and we are in an array, object, or slice
- array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false));
- $c++;
- //print("Found start of comment at {$c}\n");
-
- } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) {
- // found a comment end, and we're in one now
- array_pop($stk);
- $c++;
-
- for ($i = $top['where']; $i <= $c; ++$i)
- $chrs = substr_replace($chrs, ' ', $i, 1);
-
- //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n");
-
- }
-
- }
-
- if (reset($stk) == SERVICES_JSON_IN_ARR) {
- return $arr;
-
- } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {
- return $obj;
-
- }
-
- }
- }
- }
-
- /**
- * @todo Ultimately, this should just call PEAR::isError()
- * @return bool
- */
- function isError($data, $code = null)
- {
- if ( self::pearInstalled() ) {
- //avoid some strict warnings on PEAR isError check (looks like http://pear.php.net/bugs/bug.php?id=9950 has been around for some time)
- return @PEAR::isError($data, $code);
- } elseif (is_object($data) && (get_class($data) == 'services_json_error' ||
- is_subclass_of($data, 'services_json_error'))) {
- return true;
- }
-
- return false;
- }
-}
-
-
-// Hide the PEAR_Error variant from Doxygen
-/// @cond
-if (class_exists('PEAR_Error')) {
-
- /**
- * @ingroup API
- */
- class Services_JSON_Error extends PEAR_Error
- {
- function Services_JSON_Error($message = 'unknown error', $code = null,
- $mode = null, $options = null, $userinfo = null)
- {
- parent::PEAR_Error($message, $code, $mode, $options, $userinfo);
- }
- }
-
-} else {
-/// @endcond
-
- /**
- * @todo Ultimately, this class shall be descended from PEAR_Error
- * @ingroup API
- */
- class Services_JSON_Error
- {
- function Services_JSON_Error($message = 'unknown error', $code = null,
- $mode = null, $options = null, $userinfo = null)
- {
- $this->message = $message;
- }
-
- function __toString()
- {
- return $this->message;
- }
- }
-}
dépôts / lhc / web / wiklou.git / commitdiff