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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 | * | |
8 | * Copyright (c) 2004-2009, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors | |
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 | |
36 | * @version 1.3-dev | |
37 | * @copyright 2004-2010 Ryan Parman, Geoffrey Sneddon, Ryan McCue | |
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 | |
43 | * @todo phpDoc comments | |
44 | */ | |
45 | ||
46 | ||
47 | class SimplePie_Parser | |
48 | { | |
49 | var $error_code; | |
50 | var $error_string; | |
51 | var $current_line; | |
52 | var $current_column; | |
53 | var $current_byte; | |
54 | var $separator = ' '; | |
55 | var $namespace = array(''); | |
56 | var $element = array(''); | |
57 | var $xml_base = array(''); | |
58 | var $xml_base_explicit = array(false); | |
59 | var $xml_lang = array(''); | |
60 | var $data = array(); | |
61 | var $datas = array(array()); | |
62 | var $current_xhtml_construct = -1; | |
63 | var $encoding; | |
64 | ||
65 | public function parse(&$data, $encoding) | |
66 | { | |
67 | // Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character | |
68 | if (strtoupper($encoding) === 'US-ASCII') | |
69 | { | |
70 | $this->encoding = 'UTF-8'; | |
71 | } | |
72 | else | |
73 | { | |
74 | $this->encoding = $encoding; | |
75 | } | |
76 | ||
77 | // Strip BOM: | |
78 | // UTF-32 Big Endian BOM | |
79 | if (substr($data, 0, 4) === "\x00\x00\xFE\xFF") | |
80 | { | |
81 | $data = substr($data, 4); | |
82 | } | |
83 | // UTF-32 Little Endian BOM | |
84 | elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00") | |
85 | { | |
86 | $data = substr($data, 4); | |
87 | } | |
88 | // UTF-16 Big Endian BOM | |
89 | elseif (substr($data, 0, 2) === "\xFE\xFF") | |
90 | { | |
91 | $data = substr($data, 2); | |
92 | } | |
93 | // UTF-16 Little Endian BOM | |
94 | elseif (substr($data, 0, 2) === "\xFF\xFE") | |
95 | { | |
96 | $data = substr($data, 2); | |
97 | } | |
98 | // UTF-8 BOM | |
99 | elseif (substr($data, 0, 3) === "\xEF\xBB\xBF") | |
100 | { | |
101 | $data = substr($data, 3); | |
102 | } | |
103 | ||
104 | if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false) | |
105 | { | |
106 | $declaration = new SimplePie_XML_Declaration_Parser(substr($data, 5, $pos - 5)); | |
107 | if ($declaration->parse()) | |
108 | { | |
109 | $data = substr($data, $pos + 2); | |
110 | $data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' . $data; | |
111 | } | |
112 | else | |
113 | { | |
114 | $this->error_string = 'SimplePie bug! Please report this!'; | |
115 | return false; | |
116 | } | |
117 | } | |
118 | ||
119 | $return = true; | |
120 | ||
121 | static $xml_is_sane = null; | |
122 | if ($xml_is_sane === null) | |
123 | { | |
124 | $parser_check = xml_parser_create(); | |
125 | xml_parse_into_struct($parser_check, '<foo>&</foo>', $values); | |
126 | xml_parser_free($parser_check); | |
127 | $xml_is_sane = isset($values[0]['value']); | |
128 | } | |
129 | ||
130 | // Create the parser | |
131 | if ($xml_is_sane) | |
132 | { | |
133 | $xml = xml_parser_create_ns($this->encoding, $this->separator); | |
134 | xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1); | |
135 | xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0); | |
136 | xml_set_object($xml, $this); | |
137 | xml_set_character_data_handler($xml, 'cdata'); | |
138 | xml_set_element_handler($xml, 'tag_open', 'tag_close'); | |
139 | ||
140 | // Parse! | |
141 | if (!xml_parse($xml, $data, true)) | |
142 | { | |
143 | $this->error_code = xml_get_error_code($xml); | |
144 | $this->error_string = xml_error_string($this->error_code); | |
145 | $return = false; | |
146 | } | |
147 | $this->current_line = xml_get_current_line_number($xml); | |
148 | $this->current_column = xml_get_current_column_number($xml); | |
149 | $this->current_byte = xml_get_current_byte_index($xml); | |
150 | xml_parser_free($xml); | |
151 | return $return; | |
152 | } | |
153 | else | |
154 | { | |
155 | libxml_clear_errors(); | |
156 | $xml = new XMLReader(); | |
157 | $xml->xml($data); | |
158 | while (@$xml->read()) | |
159 | { | |
160 | switch ($xml->nodeType) | |
161 | { | |
162 | ||
163 | case constant('XMLReader::END_ELEMENT'): | |
164 | if ($xml->namespaceURI !== '') | |
165 | { | |
166 | $tagName = $xml->namespaceURI . $this->separator . $xml->localName; | |
167 | } | |
168 | else | |
169 | { | |
170 | $tagName = $xml->localName; | |
171 | } | |
172 | $this->tag_close(null, $tagName); | |
173 | break; | |
174 | case constant('XMLReader::ELEMENT'): | |
175 | $empty = $xml->isEmptyElement; | |
176 | if ($xml->namespaceURI !== '') | |
177 | { | |
178 | $tagName = $xml->namespaceURI . $this->separator . $xml->localName; | |
179 | } | |
180 | else | |
181 | { | |
182 | $tagName = $xml->localName; | |
183 | } | |
184 | $attributes = array(); | |
185 | while ($xml->moveToNextAttribute()) | |
186 | { | |
187 | if ($xml->namespaceURI !== '') | |
188 | { | |
189 | $attrName = $xml->namespaceURI . $this->separator . $xml->localName; | |
190 | } | |
191 | else | |
192 | { | |
193 | $attrName = $xml->localName; | |
194 | } | |
195 | $attributes[$attrName] = $xml->value; | |
196 | } | |
197 | $this->tag_open(null, $tagName, $attributes); | |
198 | if ($empty) | |
199 | { | |
200 | $this->tag_close(null, $tagName); | |
201 | } | |
202 | break; | |
203 | case constant('XMLReader::TEXT'): | |
204 | ||
205 | case constant('XMLReader::CDATA'): | |
206 | $this->cdata(null, $xml->value); | |
207 | break; | |
208 | } | |
209 | } | |
210 | if ($error = libxml_get_last_error()) | |
211 | { | |
212 | $this->error_code = $error->code; | |
213 | $this->error_string = $error->message; | |
214 | $this->current_line = $error->line; | |
215 | $this->current_column = $error->column; | |
216 | return false; | |
217 | } | |
218 | else | |
219 | { | |
220 | return true; | |
221 | } | |
222 | } | |
223 | } | |
224 | ||
225 | public function get_error_code() | |
226 | { | |
227 | return $this->error_code; | |
228 | } | |
229 | ||
230 | public function get_error_string() | |
231 | { | |
232 | return $this->error_string; | |
233 | } | |
234 | ||
235 | public function get_current_line() | |
236 | { | |
237 | return $this->current_line; | |
238 | } | |
239 | ||
240 | public function get_current_column() | |
241 | { | |
242 | return $this->current_column; | |
243 | } | |
244 | ||
245 | public function get_current_byte() | |
246 | { | |
247 | return $this->current_byte; | |
248 | } | |
249 | ||
250 | public function get_data() | |
251 | { | |
252 | return $this->data; | |
253 | } | |
254 | ||
255 | public function tag_open($parser, $tag, $attributes) | |
256 | { | |
257 | list($this->namespace[], $this->element[]) = $this->split_ns($tag); | |
258 | ||
259 | $attribs = array(); | |
260 | foreach ($attributes as $name => $value) | |
261 | { | |
262 | list($attrib_namespace, $attribute) = $this->split_ns($name); | |
263 | $attribs[$attrib_namespace][$attribute] = $value; | |
264 | } | |
265 | ||
266 | if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['base'])) | |
267 | { | |
268 | $this->xml_base[] = SimplePie_Misc::absolutize_url($attribs[SIMPLEPIE_NAMESPACE_XML]['base'], end($this->xml_base)); | |
269 | $this->xml_base_explicit[] = true; | |
270 | } | |
271 | else | |
272 | { | |
273 | $this->xml_base[] = end($this->xml_base); | |
274 | $this->xml_base_explicit[] = end($this->xml_base_explicit); | |
275 | } | |
276 | ||
277 | if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['lang'])) | |
278 | { | |
279 | $this->xml_lang[] = $attribs[SIMPLEPIE_NAMESPACE_XML]['lang']; | |
280 | } | |
281 | else | |
282 | { | |
283 | $this->xml_lang[] = end($this->xml_lang); | |
284 | } | |
285 | ||
286 | if ($this->current_xhtml_construct >= 0) | |
287 | { | |
288 | $this->current_xhtml_construct++; | |
289 | if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML) | |
290 | { | |
291 | $this->data['data'] .= '<' . end($this->element); | |
292 | if (isset($attribs[''])) | |
293 | { | |
294 | foreach ($attribs[''] as $name => $value) | |
295 | { | |
296 | $this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"'; | |
297 | } | |
298 | } | |
299 | $this->data['data'] .= '>'; | |
300 | } | |
301 | } | |
302 | else | |
303 | { | |
304 | $this->datas[] =& $this->data; | |
305 | $this->data =& $this->data['child'][end($this->namespace)][end($this->element)][]; | |
306 | $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)); | |
307 | if ((end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_03 && in_array(end($this->element), array('title', 'tagline', 'copyright', 'info', 'summary', 'content')) && isset($attribs['']['mode']) && $attribs['']['mode'] === 'xml') | |
308 | || (end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_10 && in_array(end($this->element), array('rights', 'subtitle', 'summary', 'info', 'title', 'content')) && isset($attribs['']['type']) && $attribs['']['type'] === 'xhtml')) | |
309 | { | |
310 | $this->current_xhtml_construct = 0; | |
311 | } | |
312 | } | |
313 | } | |
314 | ||
315 | public function cdata($parser, $cdata) | |
316 | { | |
317 | if ($this->current_xhtml_construct >= 0) | |
318 | { | |
319 | $this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding); | |
320 | } | |
321 | else | |
322 | { | |
323 | $this->data['data'] .= $cdata; | |
324 | } | |
325 | } | |
326 | ||
327 | public function tag_close($parser, $tag) | |
328 | { | |
329 | if ($this->current_xhtml_construct >= 0) | |
330 | { | |
331 | $this->current_xhtml_construct--; | |
332 | if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML && !in_array(end($this->element), array('area', 'base', 'basefont', 'br', 'col', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param'))) | |
333 | { | |
334 | $this->data['data'] .= '</' . end($this->element) . '>'; | |
335 | } | |
336 | } | |
337 | if ($this->current_xhtml_construct === -1) | |
338 | { | |
339 | $this->data =& $this->datas[count($this->datas) - 1]; | |
340 | array_pop($this->datas); | |
341 | } | |
342 | ||
343 | array_pop($this->element); | |
344 | array_pop($this->namespace); | |
345 | array_pop($this->xml_base); | |
346 | array_pop($this->xml_base_explicit); | |
347 | array_pop($this->xml_lang); | |
348 | } | |
349 | ||
350 | public function split_ns($string) | |
351 | { | |
352 | static $cache = array(); | |
353 | if (!isset($cache[$string])) | |
354 | { | |
355 | if ($pos = strpos($string, $this->separator)) | |
356 | { | |
357 | static $separator_length; | |
358 | if (!$separator_length) | |
359 | { | |
360 | $separator_length = strlen($this->separator); | |
361 | } | |
362 | $namespace = substr($string, 0, $pos); | |
363 | $local_name = substr($string, $pos + $separator_length); | |
364 | if (strtolower($namespace) === SIMPLEPIE_NAMESPACE_ITUNES) | |
365 | { | |
366 | $namespace = SIMPLEPIE_NAMESPACE_ITUNES; | |
367 | } | |
368 | ||
369 | // Normalize the Media RSS namespaces | |
370 | if ($namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG || | |
371 | $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG2 || | |
372 | $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG3 || | |
373 | $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG4 || | |
374 | $namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG5 ) | |
375 | { | |
376 | $namespace = SIMPLEPIE_NAMESPACE_MEDIARSS; | |
377 | } | |
378 | $cache[$string] = array($namespace, $local_name); | |
379 | } | |
380 | else | |
381 | { | |
382 | $cache[$string] = array('', $string); | |
383 | } | |
384 | } | |
385 | return $cache[$string]; | |
386 | } | |
387 | } |