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author | Nicolas LÅ“uillet <nicolas.loeuillet@gmail.com> | 2013-12-06 09:45:27 +0100 |
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committer | Nicolas LÅ“uillet <nicolas.loeuillet@gmail.com> | 2013-12-06 09:45:27 +0100 |
commit | 42c80841c846610be280218d53fcde06b0f0063b (patch) | |
tree | 26f7b26af6ca27ec8d3d7b8579e93cfe8a85be22 /inc/3rdparty/libraries/simplepie/library/SimplePie/gzdecode.php | |
parent | 59cc585271a5f253b15617d97e26a29403a929dc (diff) | |
download | wallabag-42c80841c846610be280218d53fcde06b0f0063b.tar.gz wallabag-42c80841c846610be280218d53fcde06b0f0063b.tar.zst wallabag-42c80841c846610be280218d53fcde06b0f0063b.zip |
[change] we now use Full-Text RSS 3.1, thank you so much @fivefilters
Diffstat (limited to 'inc/3rdparty/libraries/simplepie/library/SimplePie/gzdecode.php')
-rw-r--r-- | inc/3rdparty/libraries/simplepie/library/SimplePie/gzdecode.php | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/inc/3rdparty/libraries/simplepie/library/SimplePie/gzdecode.php b/inc/3rdparty/libraries/simplepie/library/SimplePie/gzdecode.php new file mode 100644 index 00000000..52e024ea --- /dev/null +++ b/inc/3rdparty/libraries/simplepie/library/SimplePie/gzdecode.php | |||
@@ -0,0 +1,371 @@ | |||
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) 2004-2012, 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 1.3.1 | ||
37 | * @copyright 2004-2012 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 | */ | ||
44 | |||
45 | |||
46 | /** | ||
47 | * Decode 'gzip' encoded HTTP data | ||
48 | * | ||
49 | * @package SimplePie | ||
50 | * @subpackage HTTP | ||
51 | * @link http://www.gzip.org/format.txt | ||
52 | */ | ||
53 | class SimplePie_gzdecode | ||
54 | { | ||
55 | /** | ||
56 | * Compressed data | ||
57 | * | ||
58 | * @access private | ||
59 | * @var string | ||
60 | * @see gzdecode::$data | ||
61 | */ | ||
62 | var $compressed_data; | ||
63 | |||
64 | /** | ||
65 | * Size of compressed data | ||
66 | * | ||
67 | * @access private | ||
68 | * @var int | ||
69 | */ | ||
70 | var $compressed_size; | ||
71 | |||
72 | /** | ||
73 | * Minimum size of a valid gzip string | ||
74 | * | ||
75 | * @access private | ||
76 | * @var int | ||
77 | */ | ||
78 | var $min_compressed_size = 18; | ||
79 | |||
80 | /** | ||
81 | * Current position of pointer | ||
82 | * | ||
83 | * @access private | ||
84 | * @var int | ||
85 | */ | ||
86 | var $position = 0; | ||
87 | |||
88 | /** | ||
89 | * Flags (FLG) | ||
90 | * | ||
91 | * @access private | ||
92 | * @var int | ||
93 | */ | ||
94 | var $flags; | ||
95 | |||
96 | /** | ||
97 | * Uncompressed data | ||
98 | * | ||
99 | * @access public | ||
100 | * @see gzdecode::$compressed_data | ||
101 | * @var string | ||
102 | */ | ||
103 | var $data; | ||
104 | |||
105 | /** | ||
106 | * Modified time | ||
107 | * | ||
108 | * @access public | ||
109 | * @var int | ||
110 | */ | ||
111 | var $MTIME; | ||
112 | |||
113 | /** | ||
114 | * Extra Flags | ||
115 | * | ||
116 | * @access public | ||
117 | * @var int | ||
118 | */ | ||
119 | var $XFL; | ||
120 | |||
121 | /** | ||
122 | * Operating System | ||
123 | * | ||
124 | * @access public | ||
125 | * @var int | ||
126 | */ | ||
127 | var $OS; | ||
128 | |||
129 | /** | ||
130 | * Subfield ID 1 | ||
131 | * | ||
132 | * @access public | ||
133 | * @see gzdecode::$extra_field | ||
134 | * @see gzdecode::$SI2 | ||
135 | * @var string | ||
136 | */ | ||
137 | var $SI1; | ||
138 | |||
139 | /** | ||
140 | * Subfield ID 2 | ||
141 | * | ||
142 | * @access public | ||
143 | * @see gzdecode::$extra_field | ||
144 | * @see gzdecode::$SI1 | ||
145 | * @var string | ||
146 | */ | ||
147 | var $SI2; | ||
148 | |||
149 | /** | ||
150 | * Extra field content | ||
151 | * | ||
152 | * @access public | ||
153 | * @see gzdecode::$SI1 | ||
154 | * @see gzdecode::$SI2 | ||
155 | * @var string | ||
156 | */ | ||
157 | var $extra_field; | ||
158 | |||
159 | /** | ||
160 | * Original filename | ||
161 | * | ||
162 | * @access public | ||
163 | * @var string | ||
164 | */ | ||
165 | var $filename; | ||
166 | |||
167 | /** | ||
168 | * Human readable comment | ||
169 | * | ||
170 | * @access public | ||
171 | * @var string | ||
172 | */ | ||
173 | var $comment; | ||
174 | |||
175 | /** | ||
176 | * Don't allow anything to be set | ||
177 | * | ||
178 | * @param string $name | ||
179 | * @param mixed $value | ||
180 | */ | ||
181 | public function __set($name, $value) | ||
182 | { | ||
183 | trigger_error("Cannot write property $name", E_USER_ERROR); | ||
184 | } | ||
185 | |||
186 | /** | ||
187 | * Set the compressed string and related properties | ||
188 | * | ||
189 | * @param string $data | ||
190 | */ | ||
191 | public function __construct($data) | ||
192 | { | ||
193 | $this->compressed_data = $data; | ||
194 | $this->compressed_size = strlen($data); | ||
195 | } | ||
196 | |||
197 | /** | ||
198 | * Decode the GZIP stream | ||
199 | * | ||
200 | * @return bool Successfulness | ||
201 | */ | ||
202 | public function parse() | ||
203 | { | ||
204 | if ($this->compressed_size >= $this->min_compressed_size) | ||
205 | { | ||
206 | // Check ID1, ID2, and CM | ||
207 | if (substr($this->compressed_data, 0, 3) !== "\x1F\x8B\x08") | ||
208 | { | ||
209 | return false; | ||
210 | } | ||
211 | |||
212 | // Get the FLG (FLaGs) | ||
213 | $this->flags = ord($this->compressed_data[3]); | ||
214 | |||
215 | // FLG bits above (1 << 4) are reserved | ||
216 | if ($this->flags > 0x1F) | ||
217 | { | ||
218 | return false; | ||
219 | } | ||
220 | |||
221 | // Advance the pointer after the above | ||
222 | $this->position += 4; | ||
223 | |||
224 | // MTIME | ||
225 | $mtime = substr($this->compressed_data, $this->position, 4); | ||
226 | // Reverse the string if we're on a big-endian arch because l is the only signed long and is machine endianness | ||
227 | if (current(unpack('S', "\x00\x01")) === 1) | ||
228 | { | ||
229 | $mtime = strrev($mtime); | ||
230 | } | ||
231 | $this->MTIME = current(unpack('l', $mtime)); | ||
232 | $this->position += 4; | ||
233 | |||
234 | // Get the XFL (eXtra FLags) | ||
235 | $this->XFL = ord($this->compressed_data[$this->position++]); | ||
236 | |||
237 | // Get the OS (Operating System) | ||
238 | $this->OS = ord($this->compressed_data[$this->position++]); | ||
239 | |||
240 | // Parse the FEXTRA | ||
241 | if ($this->flags & 4) | ||
242 | { | ||
243 | // Read subfield IDs | ||
244 | $this->SI1 = $this->compressed_data[$this->position++]; | ||
245 | $this->SI2 = $this->compressed_data[$this->position++]; | ||
246 | |||
247 | // SI2 set to zero is reserved for future use | ||
248 | if ($this->SI2 === "\x00") | ||
249 | { | ||
250 | return false; | ||
251 | } | ||
252 | |||
253 | // Get the length of the extra field | ||
254 | $len = current(unpack('v', substr($this->compressed_data, $this->position, 2))); | ||
255 | $this->position += 2; | ||
256 | |||
257 | // Check the length of the string is still valid | ||
258 | $this->min_compressed_size += $len + 4; | ||
259 | if ($this->compressed_size >= $this->min_compressed_size) | ||
260 | { | ||
261 | // Set the extra field to the given data | ||
262 | $this->extra_field = substr($this->compressed_data, $this->position, $len); | ||
263 | $this->position += $len; | ||
264 | } | ||
265 | else | ||
266 | { | ||
267 | return false; | ||
268 | } | ||
269 | } | ||
270 | |||
271 | // Parse the FNAME | ||
272 | if ($this->flags & 8) | ||
273 | { | ||
274 | // Get the length of the filename | ||
275 | $len = strcspn($this->compressed_data, "\x00", $this->position); | ||
276 | |||
277 | // Check the length of the string is still valid | ||
278 | $this->min_compressed_size += $len + 1; | ||
279 | if ($this->compressed_size >= $this->min_compressed_size) | ||
280 | { | ||
281 | // Set the original filename to the given string | ||
282 | $this->filename = substr($this->compressed_data, $this->position, $len); | ||
283 | $this->position += $len + 1; | ||
284 | } | ||
285 | else | ||
286 | { | ||
287 | return false; | ||
288 | } | ||
289 | } | ||
290 | |||
291 | // Parse the FCOMMENT | ||
292 | if ($this->flags & 16) | ||
293 | { | ||
294 | // Get the length of the comment | ||
295 | $len = strcspn($this->compressed_data, "\x00", $this->position); | ||
296 | |||
297 | // Check the length of the string is still valid | ||
298 | $this->min_compressed_size += $len + 1; | ||
299 | if ($this->compressed_size >= $this->min_compressed_size) | ||
300 | { | ||
301 | // Set the original comment to the given string | ||
302 | $this->comment = substr($this->compressed_data, $this->position, $len); | ||
303 | $this->position += $len + 1; | ||
304 | } | ||
305 | else | ||
306 | { | ||
307 | return false; | ||
308 | } | ||
309 | } | ||
310 | |||
311 | // Parse the FHCRC | ||
312 | if ($this->flags & 2) | ||
313 | { | ||
314 | // Check the length of the string is still valid | ||
315 | $this->min_compressed_size += $len + 2; | ||
316 | if ($this->compressed_size >= $this->min_compressed_size) | ||
317 | { | ||
318 | // Read the CRC | ||
319 | $crc = current(unpack('v', substr($this->compressed_data, $this->position, 2))); | ||
320 | |||
321 | // Check the CRC matches | ||
322 | if ((crc32(substr($this->compressed_data, 0, $this->position)) & 0xFFFF) === $crc) | ||
323 | { | ||
324 | $this->position += 2; | ||
325 | } | ||
326 | else | ||
327 | { | ||
328 | return false; | ||
329 | } | ||
330 | } | ||
331 | else | ||
332 | { | ||
333 | return false; | ||
334 | } | ||
335 | } | ||
336 | |||
337 | // Decompress the actual data | ||
338 | if (($this->data = gzinflate(substr($this->compressed_data, $this->position, -8))) === false) | ||
339 | { | ||
340 | return false; | ||
341 | } | ||
342 | else | ||
343 | { | ||
344 | $this->position = $this->compressed_size - 8; | ||
345 | } | ||
346 | |||
347 | // Check CRC of data | ||
348 | $crc = current(unpack('V', substr($this->compressed_data, $this->position, 4))); | ||
349 | $this->position += 4; | ||
350 | /*if (extension_loaded('hash') && sprintf('%u', current(unpack('V', hash('crc32b', $this->data)))) !== sprintf('%u', $crc)) | ||
351 | { | ||
352 | return false; | ||
353 | }*/ | ||
354 | |||
355 | // Check ISIZE of data | ||
356 | $isize = current(unpack('V', substr($this->compressed_data, $this->position, 4))); | ||
357 | $this->position += 4; | ||
358 | if (sprintf('%u', strlen($this->data) & 0xFFFFFFFF) !== sprintf('%u', $isize)) | ||
359 | { | ||
360 | return false; | ||
361 | } | ||
362 | |||
363 | // Wow, against all odds, we've actually got a valid gzip string | ||
364 | return true; | ||
365 | } | ||
366 | else | ||
367 | { | ||
368 | return false; | ||
369 | } | ||
370 | } | ||
371 | } | ||