pictcode / lib / Cake / Utility / Xml.php @ 635eef61
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| 1 | 635eef61 | spyder1211 | <?php
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| 2 | /**
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| 3 | * XML handling for Cake.
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| 4 | *
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| 5 | * The methods in these classes enable the datasources that use XML to work.
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| 6 | *
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| 7 | * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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| 8 | * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 9 | *
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| 10 | * Licensed under The MIT License
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| 11 | * For full copyright and license information, please see the LICENSE.txt
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| 12 | * Redistributions of files must retain the above copyright notice.
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| 13 | *
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| 14 | * @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
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| 15 | * @link http://cakephp.org CakePHP(tm) Project
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| 16 | * @package Cake.Utility
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| 17 | * @since CakePHP v .0.10.3.1400
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| 18 | * @license http://www.opensource.org/licenses/mit-license.php MIT License
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| 19 | */
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| 20 | |||
| 21 | App::uses('HttpSocket', 'Network/Http'); |
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| 22 | |||
| 23 | /**
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| 24 | * XML handling for CakePHP.
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| 25 | *
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| 26 | * The methods in these classes enable the datasources that use XML to work.
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| 27 | *
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| 28 | * @package Cake.Utility
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| 29 | */
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| 30 | class Xml { |
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| 31 | |||
| 32 | /**
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| 33 | * Initialize SimpleXMLElement or DOMDocument from a given XML string, file path, URL or array.
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| 34 | *
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| 35 | * ### Usage:
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| 36 | *
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| 37 | * Building XML from a string:
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| 38 | *
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| 39 | * `$xml = Xml::build('<example>text</example>');`
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| 40 | *
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| 41 | * Building XML from string (output DOMDocument):
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| 42 | *
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| 43 | * `$xml = Xml::build('<example>text</example>', array('return' => 'domdocument'));`
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| 44 | *
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| 45 | * Building XML from a file path:
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| 46 | *
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| 47 | * `$xml = Xml::build('/path/to/an/xml/file.xml');`
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| 48 | *
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| 49 | * Building from a remote URL:
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| 50 | *
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| 51 | * `$xml = Xml::build('http://example.com/example.xml');`
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| 52 | *
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| 53 | * Building from an array:
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| 54 | *
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| 55 | * ```
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| 56 | * $value = array(
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| 57 | * 'tags' => array(
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| 58 | * 'tag' => array(
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| 59 | * array(
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| 60 | * 'id' => '1',
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| 61 | * 'name' => 'defect'
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| 62 | * ),
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| 63 | * array(
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| 64 | * 'id' => '2',
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| 65 | * 'name' => 'enhancement'
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| 66 | * )
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| 67 | * )
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| 68 | * )
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| 69 | * );
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| 70 | * $xml = Xml::build($value);
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| 71 | * ```
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| 72 | *
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| 73 | * When building XML from an array ensure that there is only one top level element.
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| 74 | *
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| 75 | * ### Options
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| 76 | *
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| 77 | * - `return` Can be 'simplexml' to return object of SimpleXMLElement or 'domdocument' to return DOMDocument.
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| 78 | * - `loadEntities` Defaults to false. Set to true to enable loading of `<!ENTITY` definitions. This
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| 79 | * is disabled by default for security reasons.
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| 80 | * - `readFile` Set to false to disable file reading. This is important to disable when
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| 81 | * putting user data into Xml::build(). If enabled local & remote files will be read if they exist.
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| 82 | * Defaults to true for backwards compatibility reasons.
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| 83 | * - If using array as input, you can pass `options` from Xml::fromArray.
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| 84 | *
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| 85 | * @param string|array $input XML string, a path to a file, a URL or an array
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| 86 | * @param array $options The options to use
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| 87 | * @return SimpleXMLElement|DOMDocument SimpleXMLElement or DOMDocument
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| 88 | * @throws XmlException
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| 89 | */
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| 90 | public static function build($input, $options = array()) { |
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| 91 | if (!is_array($options)) { |
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| 92 | $options = array('return' => (string)$options); |
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| 93 | } |
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| 94 | $defaults = array( |
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| 95 | 'return' => 'simplexml', |
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| 96 | 'loadEntities' => false, |
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| 97 | 'readFile' => true |
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| 98 | ); |
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| 99 | $options += $defaults; |
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| 100 | |||
| 101 | if (is_array($input) || is_object($input)) { |
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| 102 | return static::fromArray((array)$input, $options); |
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| 103 | } elseif (strpos($input, '<') !== false) { |
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| 104 | return static::_loadXml($input, $options); |
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| 105 | } elseif ($options['readFile'] && file_exists($input)) { |
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| 106 | return static::_loadXml(file_get_contents($input), $options); |
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| 107 | } elseif ($options['readFile'] && strpos($input, 'http://') === 0 || strpos($input, 'https://') === 0) { |
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| 108 | try {
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| 109 | $socket = new HttpSocket(array('request' => array('redirect' => 10))); |
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| 110 | $response = $socket->get($input); |
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| 111 | if (!$response->isOk()) { |
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| 112 | throw new XmlException(__d('cake_dev', 'XML cannot be read.')); |
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| 113 | } |
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| 114 | return static::_loadXml($response->body, $options); |
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| 115 | } catch (SocketException $e) { |
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| 116 | throw new XmlException(__d('cake_dev', 'XML cannot be read.')); |
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| 117 | } |
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| 118 | } elseif (!is_string($input)) { |
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| 119 | throw new XmlException(__d('cake_dev', 'Invalid input.')); |
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| 120 | } |
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| 121 | throw new XmlException(__d('cake_dev', 'XML cannot be read.')); |
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| 122 | } |
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| 123 | |||
| 124 | /**
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| 125 | * Parse the input data and create either a SimpleXmlElement object or a DOMDocument.
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| 126 | *
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| 127 | * @param string $input The input to load.
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| 128 | * @param array $options The options to use. See Xml::build()
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| 129 | * @return SimpleXmlElement|DOMDocument
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| 130 | * @throws XmlException
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| 131 | */
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| 132 | protected static function _loadXml($input, $options) { |
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| 133 | $hasDisable = function_exists('libxml_disable_entity_loader'); |
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| 134 | $internalErrors = libxml_use_internal_errors(true); |
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| 135 | if ($hasDisable && !$options['loadEntities']) { |
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| 136 | libxml_disable_entity_loader(true);
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| 137 | } |
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| 138 | try {
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| 139 | if ($options['return'] === 'simplexml' || $options['return'] === 'simplexmlelement') { |
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| 140 | $xml = new SimpleXMLElement($input, LIBXML_NOCDATA); |
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| 141 | } else {
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| 142 | $xml = new DOMDocument(); |
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| 143 | $xml->loadXML($input); |
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| 144 | } |
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| 145 | } catch (Exception $e) { |
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| 146 | $xml = null; |
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| 147 | } |
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| 148 | if ($hasDisable && !$options['loadEntities']) { |
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| 149 | libxml_disable_entity_loader(false);
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| 150 | } |
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| 151 | libxml_use_internal_errors($internalErrors);
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| 152 | if ($xml === null) { |
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| 153 | throw new XmlException(__d('cake_dev', 'Xml cannot be read.')); |
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| 154 | } |
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| 155 | return $xml; |
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| 156 | } |
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| 157 | |||
| 158 | /**
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| 159 | * Transform an array into a SimpleXMLElement
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| 160 | *
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| 161 | * ### Options
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| 162 | *
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| 163 | * - `format` If create childs ('tags') or attributes ('attributes').
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| 164 | * - `pretty` Returns formatted Xml when set to `true`. Defaults to `false`
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| 165 | * - `version` Version of XML document. Default is 1.0.
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| 166 | * - `encoding` Encoding of XML document. If null remove from XML header. Default is the some of application.
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| 167 | * - `return` If return object of SimpleXMLElement ('simplexml') or DOMDocument ('domdocument'). Default is SimpleXMLElement.
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| 168 | *
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| 169 | * Using the following data:
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| 170 | *
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| 171 | * ```
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| 172 | * $value = array(
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| 173 | * 'root' => array(
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| 174 | * 'tag' => array(
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| 175 | * 'id' => 1,
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| 176 | * 'value' => 'defect',
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| 177 | * '@' => 'description'
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| 178 | * )
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| 179 | * )
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| 180 | * );
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| 181 | * ```
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| 182 | *
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| 183 | * Calling `Xml::fromArray($value, 'tags');` Will generate:
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| 184 | *
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| 185 | * `<root><tag><id>1</id><value>defect</value>description</tag></root>`
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| 186 | *
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| 187 | * And calling `Xml::fromArray($value, 'attributes');` Will generate:
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| 188 | *
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| 189 | * `<root><tag id="1" value="defect">description</tag></root>`
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| 190 | *
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| 191 | * @param array $input Array with data
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| 192 | * @param array $options The options to use
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| 193 | * @return SimpleXMLElement|DOMDocument SimpleXMLElement or DOMDocument
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| 194 | * @throws XmlException
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| 195 | */
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| 196 | public static function fromArray($input, $options = array()) { |
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| 197 | if (!is_array($input) || count($input) !== 1) { |
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| 198 | throw new XmlException(__d('cake_dev', 'Invalid input.')); |
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| 199 | } |
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| 200 | $key = key($input); |
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| 201 | if (is_int($key)) { |
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| 202 | throw new XmlException(__d('cake_dev', 'The key of input must be alphanumeric')); |
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| 203 | } |
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| 204 | |||
| 205 | if (!is_array($options)) { |
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| 206 | $options = array('format' => (string)$options); |
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| 207 | } |
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| 208 | $defaults = array( |
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| 209 | 'format' => 'tags', |
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| 210 | 'version' => '1.0', |
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| 211 | 'encoding' => Configure::read('App.encoding'), |
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| 212 | 'return' => 'simplexml', |
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| 213 | 'pretty' => false |
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| 214 | ); |
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| 215 | $options += $defaults; |
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| 216 | |||
| 217 | $dom = new DOMDocument($options['version'], $options['encoding']); |
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| 218 | if ($options['pretty']) { |
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| 219 | $dom->formatOutput = true; |
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| 220 | } |
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| 221 | static::_fromArray($dom, $dom, $input, $options['format']); |
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| 222 | |||
| 223 | $options['return'] = strtolower($options['return']); |
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| 224 | if ($options['return'] === 'simplexml' || $options['return'] === 'simplexmlelement') { |
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| 225 | return new SimpleXMLElement($dom->saveXML()); |
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| 226 | } |
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| 227 | return $dom; |
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| 228 | } |
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| 229 | |||
| 230 | /**
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| 231 | * Recursive method to create childs from array
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| 232 | *
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| 233 | * @param DOMDocument $dom Handler to DOMDocument
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| 234 | * @param DOMElement $node Handler to DOMElement (child)
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| 235 | * @param array &$data Array of data to append to the $node.
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| 236 | * @param string $format Either 'attributes' or 'tags'. This determines where nested keys go.
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| 237 | * @return void
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| 238 | * @throws XmlException
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| 239 | */
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| 240 | protected static function _fromArray($dom, $node, &$data, $format) { |
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| 241 | if (empty($data) || !is_array($data)) { |
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| 242 | return;
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| 243 | } |
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| 244 | foreach ($data as $key => $value) { |
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| 245 | if (is_string($key)) { |
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| 246 | if (!is_array($value)) { |
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| 247 | if (is_bool($value)) { |
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| 248 | $value = (int)$value; |
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| 249 | } elseif ($value === null) { |
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| 250 | $value = ''; |
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| 251 | } |
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| 252 | $isNamespace = strpos($key, 'xmlns:'); |
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| 253 | if ($isNamespace !== false) { |
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| 254 | $node->setAttributeNS('http://www.w3.org/2000/xmlns/', $key, $value); |
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| 255 | continue;
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| 256 | } |
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| 257 | if ($key[0] !== '@' && $format === 'tags') { |
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| 258 | $child = null; |
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| 259 | if (!is_numeric($value)) { |
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| 260 | // Escape special characters
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| 261 | // http://www.w3.org/TR/REC-xml/#syntax
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| 262 | // https://bugs.php.net/bug.php?id=36795
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| 263 | $child = $dom->createElement($key, ''); |
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| 264 | $child->appendChild(new DOMText($value)); |
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| 265 | } else {
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| 266 | $child = $dom->createElement($key, $value); |
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| 267 | } |
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| 268 | $node->appendChild($child); |
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| 269 | } else {
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| 270 | if ($key[0] === '@') { |
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| 271 | $key = substr($key, 1); |
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| 272 | } |
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| 273 | $attribute = $dom->createAttribute($key); |
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| 274 | $attribute->appendChild($dom->createTextNode($value)); |
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| 275 | $node->appendChild($attribute); |
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| 276 | } |
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| 277 | } else {
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| 278 | if ($key[0] === '@') { |
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| 279 | throw new XmlException(__d('cake_dev', 'Invalid array')); |
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| 280 | } |
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| 281 | if (is_numeric(implode('', array_keys($value)))) { // List |
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| 282 | foreach ($value as $item) { |
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| 283 | $itemData = compact('dom', 'node', 'key', 'format'); |
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| 284 | $itemData['value'] = $item; |
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| 285 | static::_createChild($itemData); |
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| 286 | } |
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| 287 | } else { // Struct |
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| 288 | static::_createChild(compact('dom', 'node', 'key', 'value', 'format')); |
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| 289 | } |
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| 290 | } |
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| 291 | } else {
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| 292 | throw new XmlException(__d('cake_dev', 'Invalid array')); |
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| 293 | } |
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| 294 | } |
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| 295 | } |
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| 296 | |||
| 297 | /**
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| 298 | * Helper to _fromArray(). It will create childs of arrays
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| 299 | *
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| 300 | * @param array $data Array with informations to create childs
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| 301 | * @return void
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| 302 | */
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| 303 | protected static function _createChild($data) { |
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| 304 | extract($data); |
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| 305 | $childNS = $childValue = null; |
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| 306 | if (is_array($value)) { |
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| 307 | if (isset($value['@'])) { |
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| 308 | $childValue = (string)$value['@']; |
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| 309 | unset($value['@']); |
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| 310 | } |
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| 311 | if (isset($value['xmlns:'])) { |
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| 312 | $childNS = $value['xmlns:']; |
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| 313 | unset($value['xmlns:']); |
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| 314 | } |
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| 315 | } elseif (!empty($value) || $value === 0) { |
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| 316 | $childValue = (string)$value; |
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| 317 | } |
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| 318 | |||
| 319 | $child = $dom->createElement($key); |
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| 320 | if ($childValue !== null) { |
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| 321 | $child->appendChild($dom->createTextNode($childValue)); |
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| 322 | } |
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| 323 | if ($childNS) { |
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| 324 | $child->setAttribute('xmlns', $childNS); |
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| 325 | } |
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| 326 | |||
| 327 | static::_fromArray($dom, $child, $value, $format); |
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| 328 | $node->appendChild($child); |
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| 329 | } |
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| 330 | |||
| 331 | /**
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| 332 | * Returns this XML structure as an array.
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| 333 | *
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| 334 | * @param SimpleXMLElement|DOMDocument|DOMNode $obj SimpleXMLElement, DOMDocument or DOMNode instance
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| 335 | * @return array Array representation of the XML structure.
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| 336 | * @throws XmlException
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| 337 | */
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| 338 | public static function toArray($obj) { |
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| 339 | if ($obj instanceof DOMNode) { |
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| 340 | $obj = simplexml_import_dom($obj); |
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| 341 | } |
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| 342 | if (!($obj instanceof SimpleXMLElement)) { |
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| 343 | throw new XmlException(__d('cake_dev', 'The input is not instance of SimpleXMLElement, DOMDocument or DOMNode.')); |
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| 344 | } |
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| 345 | $result = array(); |
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| 346 | $namespaces = array_merge(array('' => ''), $obj->getNamespaces(true)); |
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| 347 | static::_toArray($obj, $result, '', array_keys($namespaces)); |
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| 348 | return $result; |
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| 349 | } |
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| 350 | |||
| 351 | /**
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| 352 | * Recursive method to toArray
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| 353 | *
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| 354 | * @param SimpleXMLElement $xml SimpleXMLElement object
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| 355 | * @param array &$parentData Parent array with data
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| 356 | * @param string $ns Namespace of current child
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| 357 | * @param array $namespaces List of namespaces in XML
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| 358 | * @return void
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| 359 | */
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| 360 | protected static function _toArray($xml, &$parentData, $ns, $namespaces) { |
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| 361 | $data = array(); |
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| 362 | |||
| 363 | foreach ($namespaces as $namespace) { |
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| 364 | foreach ($xml->attributes($namespace, true) as $key => $value) { |
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| 365 | if (!empty($namespace)) { |
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| 366 | $key = $namespace . ':' . $key; |
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| 367 | } |
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| 368 | $data['@' . $key] = (string)$value; |
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| 369 | } |
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| 370 | |||
| 371 | foreach ($xml->children($namespace, true) as $child) { |
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| 372 | static::_toArray($child, $data, $namespace, $namespaces); |
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| 373 | } |
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| 374 | } |
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| 375 | |||
| 376 | $asString = trim((string)$xml); |
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| 377 | if (empty($data)) { |
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| 378 | $data = $asString; |
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| 379 | } elseif (strlen($asString) > 0) { |
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| 380 | $data['@'] = $asString; |
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| 381 | } |
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| 382 | |||
| 383 | if (!empty($ns)) { |
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| 384 | $ns .= ':'; |
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| 385 | } |
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| 386 | $name = $ns . $xml->getName(); |
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| 387 | if (isset($parentData[$name])) { |
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| 388 | if (!is_array($parentData[$name]) || !isset($parentData[$name][0])) { |
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| 389 | $parentData[$name] = array($parentData[$name]); |
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| 390 | } |
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| 391 | $parentData[$name][] = $data; |
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| 392 | } else {
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| 393 | $parentData[$name] = $data; |
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| 394 | } |
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| 395 | } |
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| 396 | |||
| 397 | } |