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ec397236 NL |
1 | <?php |
2 | /** | |
3 | * SimplePie | |
4 | * | |
5 | * A PHP-Based RSS and Atom Feed Framework. | |
6 | * Takes the hard work out of managing a complete RSS/Atom solution. | |
7 | * | |
42c80841 | 8 | * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors |
ec397236 NL |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without modification, are | |
12 | * permitted provided that the following conditions are met: | |
13 | * | |
14 | * * Redistributions of source code must retain the above copyright notice, this list of | |
15 | * conditions and the following disclaimer. | |
16 | * | |
17 | * * Redistributions in binary form must reproduce the above copyright notice, this list | |
18 | * of conditions and the following disclaimer in the documentation and/or other materials | |
19 | * provided with the distribution. | |
20 | * | |
21 | * * Neither the name of the SimplePie Team nor the names of its contributors may be used | |
22 | * to endorse or promote products derived from this software without specific prior | |
23 | * written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS | |
26 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY | |
27 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS | |
28 | * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
30 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
31 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
32 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
33 | * POSSIBILITY OF SUCH DAMAGE. | |
34 | * | |
35 | * @package SimplePie | |
42c80841 NL |
36 | * @version 1.3.1 |
37 | * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue | |
ec397236 NL |
38 | * @author Ryan Parman |
39 | * @author Geoffrey Sneddon | |
40 | * @author Ryan McCue | |
41 | * @link http://simplepie.org/ SimplePie | |
42 | * @license http://www.opensource.org/licenses/bsd-license.php BSD License | |
ec397236 NL |
43 | */ |
44 | ||
42c80841 NL |
45 | /** |
46 | * Parses XML into something sane | |
47 | * | |
48 | * | |
49 | * This class can be overloaded with {@see SimplePie::set_parser_class()} | |
50 | * | |
51 | * @package SimplePie | |
52 | * @subpackage Parsing | |
53 | */ | |
ec397236 NL |
54 | class SimplePie_Parser |
55 | { | |
56 | var $error_code; | |
57 | var $error_string; | |
58 | var $current_line; | |
59 | var $current_column; | |
60 | var $current_byte; | |
61 | var $separator = ' '; | |
62 | var $namespace = array(''); | |
63 | var $element = array(''); | |
64 | var $xml_base = array(''); | |
65 | var $xml_base_explicit = array(false); | |
66 | var $xml_lang = array(''); | |
67 | var $data = array(); | |
68 | var $datas = array(array()); | |
69 | var $current_xhtml_construct = -1; | |
70 | var $encoding; | |
42c80841 NL |
71 | protected $registry; |
72 | ||
73 | public function set_registry(SimplePie_Registry $registry) | |
74 | { | |
75 | $this->registry = $registry; | |
76 | } | |
ec397236 NL |
77 | |
78 | public function parse(&$data, $encoding) | |
79 | { | |
80 | // Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character | |
81 | if (strtoupper($encoding) === 'US-ASCII') | |
82 | { | |
83 | $this->encoding = 'UTF-8'; | |
84 | } | |
85 | else | |
86 | { | |
87 | $this->encoding = $encoding; | |
88 | } | |
89 | ||
90 | // Strip BOM: | |
91 | // UTF-32 Big Endian BOM | |
92 | if (substr($data, 0, 4) === "\x00\x00\xFE\xFF") | |
93 | { | |
94 | $data = substr($data, 4); | |
95 | } | |
96 | // UTF-32 Little Endian BOM | |
97 | elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00") | |
98 | { | |
99 | $data = substr($data, 4); | |
100 | } | |
101 | // UTF-16 Big Endian BOM | |
102 | elseif (substr($data, 0, 2) === "\xFE\xFF") | |
103 | { | |
104 | $data = substr($data, 2); | |
105 | } | |
106 | // UTF-16 Little Endian BOM | |
107 | elseif (substr($data, 0, 2) === "\xFF\xFE") | |
108 | { | |
109 | $data = substr($data, 2); | |
110 | } | |
111 | // UTF-8 BOM | |
112 | elseif (substr($data, 0, 3) === "\xEF\xBB\xBF") | |
113 | { | |
114 | $data = substr($data, 3); | |
115 | } | |
116 | ||
117 | if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false) | |
118 | { | |
42c80841 | 119 | $declaration = $this->registry->create('XML_Declaration_Parser', array(substr($data, 5, $pos - 5))); |
ec397236 NL |
120 | if ($declaration->parse()) |
121 | { | |
122 | $data = substr($data, $pos + 2); | |
123 | $data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' . $data; | |
124 | } | |
125 | else | |
126 | { | |
127 | $this->error_string = 'SimplePie bug! Please report this!'; | |
128 | return false; | |
129 | } | |
130 | } | |
131 | ||
132 | $return = true; | |
133 | ||
134 | static $xml_is_sane = null; | |
135 | if ($xml_is_sane === null) | |
136 | { | |
137 | $parser_check = xml_parser_create(); | |
138 | xml_parse_into_struct($parser_check, '<foo>&</foo>', $values); | |
139 | xml_parser_free($parser_check); | |
140 | $xml_is_sane = isset($values[0]['value']); | |
141 | } | |
142 | ||
143 | // Create the parser | |
144 | if ($xml_is_sane) | |
145 | { | |
146 | $xml = xml_parser_create_ns($this->encoding, $this->separator); | |
147 | xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1); | |
148 | xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0); | |
149 | xml_set_object($xml, $this); | |
150 | xml_set_character_data_handler($xml, 'cdata'); | |
151 | xml_set_element_handler($xml, 'tag_open', 'tag_close'); | |
152 | ||
153 | // Parse! | |
154 | if (!xml_parse($xml, $data, true)) | |
155 | { | |
156 | $this->error_code = xml_get_error_code($xml); | |
157 | $this->error_string = xml_error_string($this->error_code); | |
158 | $return = false; | |
159 | } | |
160 | $this->current_line = xml_get_current_line_number($xml); | |
161 | $this->current_column = xml_get_current_column_number($xml); | |
162 | $this->current_byte = xml_get_current_byte_index($xml); | |
163 | xml_parser_free($xml); | |
164 | return $return; | |
165 | } | |
166 | else | |
167 | { | |
168 | libxml_clear_errors(); | |
169 | $xml = new XMLReader(); | |
170 | $xml->xml($data); | |
171 | while (@$xml->read()) | |
172 | { | |
173 | switch ($xml->nodeType) | |
174 | { | |
175 | ||
176 | case constant('XMLReader::END_ELEMENT'): | |
177 | if ($xml->namespaceURI !== '') | |
178 | { | |
179 | $tagName = $xml->namespaceURI . $this->separator . $xml->localName; | |
180 | } | |
181 | else | |
182 | { | |
183 | $tagName = $xml->localName; | |
184 | } | |
185 | $this->tag_close(null, $tagName); | |
186 | break; | |
187 | case constant('XMLReader::ELEMENT'): | |
188 | $empty = $xml->isEmptyElement; | |
189 | if ($xml->namespaceURI !== '') | |
190 | { | |
191 | $tagName = $xml->namespaceURI . $this->separator . $xml->localName; | |
192 | } | |
193 | else | |
194 | { | |
195 | $tagName = $xml->localName; | |
196 | } | |
197 | $attributes = array(); | |
198 | while ($xml->moveToNextAttribute()) | |
199 | { | |
200 | if ($xml->namespaceURI !== '') | |
201 | { | |
202 | $attrName = $xml->namespaceURI . $this->separator . $xml->localName; | |
203 | } | |
204 | else | |
205 | { | |
206 | $attrName = $xml->localName; | |
207 | } | |
208 | $attributes[$attrName] = $xml->value; | |
209 | } | |
210 | $this->tag_open(null, $tagName, $attributes); | |
211 | if ($empty) | |
212 | { | |
213 | $this->tag_close(null, $tagName); | |
214 | } | |
215 | break; | |
216 | case constant('XMLReader::TEXT'): | |
217 | ||
218 | case constant('XMLReader::CDATA'): | |
219 | $this->cdata(null, $xml->value); | |
220 | break; | |
221 | } | |
222 | } | |
223 | if ($error = libxml_get_last_error()) | |
224 | { | |
225 | $this->error_code = $error->code; | |
226 | $this->error_string = $error->message; | |
227 | $this->current_line = $error->line; | |
228 | $this->current_column = $error->column; | |
229 | return false; | |
230 | } | |
231 | else | |
232 | { | |
233 | return true; | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | public function get_error_code() | |
239 | { | |
240 | return $this->error_code; | |
241 | } | |
242 | ||
243 | public function get_error_string() | |
244 | { | |
245 | return $this->error_string; | |
246 | } | |
247 | ||
248 | public function get_current_line() | |
249 | { | |
250 | return $this->current_line; | |
251 | } | |
252 | ||
253 | public function get_current_column() | |
254 | { | |
255 | return $this->current_column; | |
256 | } | |
257 | ||
258 | public function get_current_byte() | |
259 | { | |
260 | return $this->current_byte; | |
261 | } | |
262 | ||
263 | public function get_data() | |
264 | { | |
265 | return $this->data; | |
266 | } | |
267 | ||
268 | public function tag_open($parser, $tag, $attributes) | |
269 | { | |
270 | list($this->namespace[], $this->element[]) = $this->split_ns($tag); | |
271 | ||
272 | $attribs = array(); | |
273 | foreach ($attributes as $name => $value) | |
274 | { | |
275 | list($attrib_namespace, $attribute) = $this->split_ns($name); | |
276 | $attribs[$attrib_namespace][$attribute] = $value; | |
277 | } | |
278 | ||
279 | if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['base'])) | |
280 | { | |
42c80841 NL |
281 | $base = $this->registry->call('Misc', 'absolutize_url', array($attribs[SIMPLEPIE_NAMESPACE_XML]['base'], end($this->xml_base))); |
282 | if ($base !== false) | |
283 | { | |
284 | $this->xml_base[] = $base; | |
285 | $this->xml_base_explicit[] = true; | |
286 | } | |
ec397236 NL |
287 | } |
288 | else | |
289 | { | |
290 | $this->xml_base[] = end($this->xml_base); | |
291 | $this->xml_base_explicit[] = end($this->xml_base_explicit); | |
292 | } | |
293 | ||
294 | if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['lang'])) | |
295 | { | |
296 | $this->xml_lang[] = $attribs[SIMPLEPIE_NAMESPACE_XML]['lang']; | |
297 | } | |
298 | else | |
299 | { | |
300 | $this->xml_lang[] = end($this->xml_lang); | |
301 | } | |
302 | ||
303 | if ($this->current_xhtml_construct >= 0) | |
304 | { | |
305 | $this->current_xhtml_construct++; | |
306 | if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML) | |
307 | { | |
308 | $this->data['data'] .= '<' . end($this->element); | |
309 | if (isset($attribs[''])) | |
310 | { | |
311 | foreach ($attribs[''] as $name => $value) | |
312 | { | |
313 | $this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"'; | |
314 | } | |
315 | } | |
316 | $this->data['data'] .= '>'; | |
317 | } | |
318 | } | |
319 | else | |
320 | { | |
321 | $this->datas[] =& $this->data; | |
322 | $this->data =& $this->data['child'][end($this->namespace)][end($this->element)][]; | |
323 | $this->data = array('data' => '', 'attribs' => $attribs, 'xml_base' => end($this->xml_base), 'xml_base_explicit' => end($this->xml_base_explicit), 'xml_lang' => end($this->xml_lang)); | |
324 | if ((end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_03 && in_array(end($this->element), array('title', 'tagline', 'copyright', 'info', 'summary', 'content')) && isset($attribs['']['mode']) && $attribs['']['mode'] === 'xml') | |
42c80841 NL |
325 | || (end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_10 && in_array(end($this->element), array('rights', 'subtitle', 'summary', 'info', 'title', 'content')) && isset($attribs['']['type']) && $attribs['']['type'] === 'xhtml') |
326 | || (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_20 && in_array(end($this->element), array('title'))) | |
327 | || (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_090 && in_array(end($this->element), array('title'))) | |
328 | || (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_10 && in_array(end($this->element), array('title')))) | |
ec397236 NL |
329 | { |
330 | $this->current_xhtml_construct = 0; | |
331 | } | |
332 | } | |
333 | } | |
334 | ||
335 | public function cdata($parser, $cdata) | |
336 | { | |
337 | if ($this->current_xhtml_construct >= 0) | |
338 | { | |
339 | $this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding); | |
340 | } | |
341 | else | |
342 | { | |
343 | $this->data['data'] .= $cdata; | |
344 | } | |
345 | } | |
346 | ||
347 | public function tag_close($parser, $tag) | |
348 | { | |
349 | if ($this->current_xhtml_construct >= 0) | |
350 | { | |
351 | $this->current_xhtml_construct--; | |
352 | if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML && !in_array(end($this->element), array('area', 'base', 'basefont', 'br', 'col', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param'))) | |
353 | { | |
354 | $this->data['data'] .= '</' . end($this->element) . '>'; | |
355 | } | |
356 | } | |
357 | if ($this->current_xhtml_construct === -1) | |
358 | { | |
359 | $this->data =& $this->datas[count($this->datas) - 1]; | |
360 | array_pop($this->datas); | |
361 | } | |
362 | ||
363 | array_pop($this->element); | |
364 | array_pop($this->namespace); | |
365 | array_pop($this->xml_base); | |
366 | array_pop($this->xml_base_explicit); | |
367 | array_pop($this->xml_lang); | |
368 | } | |
369 | ||
370 | public function split_ns($string) | |
371 | { | |
372 | static $cache = array(); | |
373 | if (!isset($cache[$string])) | |
374 | { | |
375 | if ($pos = strpos($string, $this->separator)) | |
376 | { | |
377 | static $separator_length; | |
378 | if (!$separator_length) | |
379 | { | |
380 | $separator_length = strlen($this->separator); | |
381 | } | |
382 | $namespace = substr($string, 0, $pos); | |
383 | $local_name = substr($string, $pos + $separator_length); | |
384 | if (strtolower($namespace) === SIMPLEPIE_NAMESPACE_ITUNES) | |
385 | { | |
386 | $namespace = SIMPLEPIE_NAMESPACE_ITUNES; | |
387 | } | |
388 | ||
389 | // Normalize the Media RSS namespaces | |
390 | if ($namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG || | |
391 | $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG2 || | |
392 | $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG3 || | |
393 | $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG4 || | |
394 | $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG5 ) | |
395 | { | |
396 | $namespace = SIMPLEPIE_NAMESPACE_MEDIARSS; | |
397 | } | |
398 | $cache[$string] = array($namespace, $local_name); | |
399 | } | |
400 | else | |
401 | { | |
402 | $cache[$string] = array('', $string); | |
403 | } | |
404 | } | |
405 | return $cache[$string]; | |
406 | } | |
407 | } |