aboutsummaryrefslogtreecommitdiffhomepage
path: root/inc/poche/Tools.class.php
blob: 2ee86c74e7ccb5823bfd4663454ba3ca90f8eab0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
<?php
/**
 * wallabag, self hostable application allowing you to not miss any content anymore
 *
 * @category   wallabag
 * @author     Nicolas Lœuillet <nicolas@loeuillet.org>
 * @copyright  2013
 * @license    http://opensource.org/licenses/MIT see COPYING file
 */

final class Tools
{
    /**
     * Initialize PHP environment
     */
    public static function initPhp()
    {
        define('START_TIME', microtime(true));

        function stripslashesDeep($value) {
            return is_array($value)
                ? array_map('stripslashesDeep', $value)
                : stripslashes($value);
        }

        if (get_magic_quotes_gpc()) {
            $_POST = array_map('stripslashesDeep', $_POST);
            $_GET = array_map('stripslashesDeep', $_GET);
            $_COOKIE = array_map('stripslashesDeep', $_COOKIE);
        }

        ob_start();
        register_shutdown_function('ob_end_flush');
    }

    /**
     * Get wallabag instance URL
     *
     * @return string
     */
    public static function getPocheUrl()
    {
    	$baseUrl = "";

        $https = (!empty($_SERVER['HTTPS'])
                    && (strtolower($_SERVER['HTTPS']) == 'on'))
            || (isset($_SERVER["SERVER_PORT"])
                    && $_SERVER["SERVER_PORT"] == '443') // HTTPS detection.
            || (isset($_SERVER["SERVER_PORT"]) //Custom HTTPS port detection
                    && $_SERVER["SERVER_PORT"] == SSL_PORT)
             || (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])
                    && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https');

        $serverport = (!isset($_SERVER["SERVER_PORT"])
            || $_SERVER["SERVER_PORT"] == '80'
            || $_SERVER["SERVER_PORT"] == HTTP_PORT
            || ($https && $_SERVER["SERVER_PORT"] == '443')
            || ($https && $_SERVER["SERVER_PORT"]==SSL_PORT) //Custom HTTPS port detection
            ? '' : ':' . $_SERVER["SERVER_PORT"]);
        
        if (isset($_SERVER["HTTP_X_FORWARDED_PORT"])) {
            $serverport = ':' . $_SERVER["HTTP_X_FORWARDED_PORT"];
        }

        $scriptname = str_replace('/index.php', '/', $_SERVER["SCRIPT_NAME"]);

        if (!isset($_SERVER["HTTP_HOST"])) {
            return $scriptname;
        }

        $host = (isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME']));

        if (strpos($host, ':') !== false) {
            $serverport = '';
        }

		// check if BASE_URL is configured
		if(BASE_URL) {
			$baseUrl = BASE_URL;
		} else {
			$baseUrl = 'http' . ($https ? 's' : '') . '://' . $host . $serverport;
		}

    return $baseUrl . $scriptname;
    
    }

    /**
     * Redirects to a URL
     *
     * @param string $url
     */
    public static function redirect($url = '')
    {
        if ($url === '') {
            $url = (empty($_SERVER['HTTP_REFERER'])?'?':$_SERVER['HTTP_REFERER']);
            if (isset($_POST['returnurl'])) {
                $url = $_POST['returnurl'];
            }
        }

        # prevent loop
        if (empty($url) || parse_url($url, PHP_URL_QUERY) === $_SERVER['QUERY_STRING']) {
            $url = Tools::getPocheUrl();
        }

        if (substr($url, 0, 1) !== '?') {
            $ref = Tools::getPocheUrl();
            if (substr($url, 0, strlen($ref)) !== $ref) {
                $url = $ref;
            }
        }

        self::logm('redirect to ' . $url);
        header('Location: '.$url);
        exit();
    }

    /**
     * Returns name of the template file to display
     *
     * @param $view
     * @return string
     */
    public static function getTplFile($view)
    {
        $views = array(
            'install', 'import', 'export', 'config', 'tags',
            'edit-tags', 'view', 'login', 'error', 'about', 'register'
            );

        return (in_array($view, $views) ? $view . '.twig' : 'home.twig');
    }

    /**
     * Download a file (typically, for downloading pictures on web server)
     *
     * @param $url
     * @return bool|mixed|string
     */
    public static function getFile($url)
    {
        $timeout = 15;
        $useragent = "Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/36.0";

        if (in_array ('curl', get_loaded_extensions())) {
            # Fetch feed from URL
            $curl = curl_init();
            curl_setopt($curl, CURLOPT_URL, $url);
            curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
            if (!ini_get('open_basedir') && !ini_get('safe_mode')) {
                curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
            }
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($curl, CURLOPT_HEADER, false);

            # for ssl, do not verified certificate
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
            curl_setopt($curl, CURLOPT_AUTOREFERER, TRUE );

            # FeedBurner requires a proper USER-AGENT...
            curl_setopt($curl, CURL_HTTP_VERSION_1_1, true);
            curl_setopt($curl, CURLOPT_ENCODING, "gzip, deflate");
            curl_setopt($curl, CURLOPT_USERAGENT, $useragent);

            $data = curl_exec($curl);
            $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
            $httpcodeOK = isset($httpcode) and ($httpcode == 200 or $httpcode == 301);
            curl_close($curl);
        } else {
            # create http context and add timeout and user-agent
            $context = stream_context_create(
                array(
                    'http' => array(
                        'timeout' => $timeout,
                        'header' => "User-Agent: " . $useragent,
                        'follow_location' => true
                    ),
                    'ssl' => array(
                        'verify_peer' => false,
                        'allow_self_signed' => true
                    )
                )
            );

            # only download page lesser than 4MB
            $data = @file_get_contents($url, false, $context, -1, 4000000);

            if (isset($http_response_header) and isset($http_response_header[0])) {
                $httpcodeOK = isset($http_response_header) and isset($http_response_header[0]) and ((strpos($http_response_header[0], '200 OK') !== FALSE) or (strpos($http_response_header[0], '301 Moved Permanently') !== FALSE));
            }
        }

        # if response is not empty and response is OK
        if (isset($data) and isset($httpcodeOK) and $httpcodeOK) {

            # take charset of page and get it
            preg_match('#<meta .*charset=.*>#Usi', $data, $meta);

            # if meta tag is found
            if (!empty($meta[0])) {
                preg_match('#charset="?(.*)"#si', $meta[0], $encoding);
                # if charset is found set it otherwise, set it to utf-8
                $html_charset = (!empty($encoding[1])) ? strtolower($encoding[1]) : 'utf-8';
                if (empty($encoding[1])) $encoding[1] = 'utf-8';
            } else {
                $html_charset = 'utf-8';
                $encoding[1] = '';
            }

            # replace charset of url to charset of page
            $data = str_replace('charset=' . $encoding[1], 'charset=' . $html_charset, $data);

            return $data;
        }
        else {
            return FALSE;
        }
    }

    /**
     * Headers for JSON export
     *
     * @param $data
     */
    public static function renderJson($data)
    {
        header('Cache-Control: no-cache, must-revalidate');
        header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
        header('Content-type: application/json; charset=UTF-8');
        echo json_encode($data);
        exit();
    }

    /**
     * UTF-8 encode array of string
     *
     * @param $data
     */
    public static function utf8ize($data)
    {
       if (is_array($data))
        {
            foreach ($data as $k => $v)
            {
                $data[$k] = self::utf8ize($v);
            }
        }
        else if (is_string ($data))
        {
            if ('' == mb_detect_encoding($data))
            {
                return utf8_encode($data);
            }
            else
            {
                return $data;
            }
        }
        return $data;
    }

    /**
     * Create new line in log file
     *
     * @param $message
     */
    public static function logm($message)
    {
        if (DEBUG_POCHE && php_sapi_name() != 'cli') {
            $t = strval(date('Y/m/d_H:i:s')) . ' - ' . $_SERVER["REMOTE_ADDR"] . ' - ' . strval($message) . "\n";
            file_put_contents(CACHE . '/log.txt', $t, FILE_APPEND);
            error_log('DEBUG POCHE : ' . $message);
        }
    }

    /**
     * Encode a URL by using a salt
     *
     * @param $string
     * @return string
     */
    public static function encodeString($string)
    {
        return sha1($string . SALT);
    }

    /**
     * Cleans a variable
     *
     * @param $var
     * @param string $default
     * @return string
     */
    public static function checkVar($var, $default = '')
    {
        return ((isset($_REQUEST["$var"])) ? htmlentities($_REQUEST["$var"]) : $default);
    }

    /**
     * Returns the domain name for a URL
     *
     * @param $url
     * @return string
     */
    public static function getDomain($url)
    {
        return parse_url($url, PHP_URL_HOST);
    }

    /**
     * For a given text, we calculate reading time for an article
     *
     * @param $text
     * @return float
     */
    public static function getReadingTime($text)
    {
        return floor(str_word_count(strip_tags($text)) / 200);
    }

    /**
     * Returns the correct header for a status code
     *
     * @param $status_code
     */
    private static function _status($status_code)
    {
        if (strpos(php_sapi_name(), 'apache') !== false) {

            header('HTTP/1.0 '.$status_code);
        }
        else {

            header('Status: '.$status_code);
        }
    }

    /**
     * Get the content for a given URL (by a call to FullTextFeed)
     *
     * @param Url $url
     * @return mixed
     */
    public static function getPageContent(Url $url)
    {
        // Saving and clearing context
        $REAL = array();
        foreach( $GLOBALS as $key => $value ) {
            if( $key != 'GLOBALS' && $key != '_SESSION' && $key != 'HTTP_SESSION_VARS' ) {
                $GLOBALS[$key]  = array();
                $REAL[$key]     = $value;
            }
        }
        // Saving and clearing session
        if (isset($_SESSION)) {
            $REAL_SESSION = array();
            foreach( $_SESSION as $key => $value ) {
                $REAL_SESSION[$key] = $value;
                unset($_SESSION[$key]);
            }
        }

        // Running code in different context
        $scope = function() {
            extract( func_get_arg(1) );
            $_GET = $_REQUEST = array(
                "url" => $url->getUrl(),
                "max" => 5,
                "links" => "preserve",
                "exc" => "",
                "format" => "json",
                "submit" => "Create Feed"
            );
            ob_start();
            require func_get_arg(0);
            $json = ob_get_contents();
            ob_end_clean();
            return $json;
        };

	// Silence $scope function to avoid
	// issues with FTRSS when error_reporting is to high
	// FTRSS generates PHP warnings which break output
        $json = @$scope("inc/3rdparty/makefulltextfeed.php", array("url" => $url));

        // Clearing and restoring context
        foreach ($GLOBALS as $key => $value) {
            if($key != "GLOBALS" && $key != "_SESSION" ) {
                unset($GLOBALS[$key]);
            }
        }
        foreach ($REAL as $key => $value) {
            $GLOBALS[$key] = $value;
        }

        // Clearing and restoring session
        if (isset($REAL_SESSION)) {
            foreach($_SESSION as $key => $value) {
                unset($_SESSION[$key]);
            }

            foreach($REAL_SESSION as $key => $value) {
                $_SESSION[$key] = $value;
            }
        }

        return json_decode($json, true);
    }

    /**
     * Returns whether we handle an AJAX (XMLHttpRequest) request.
     *
     * @return boolean whether we handle an AJAX (XMLHttpRequest) request.
     */
    public static function isAjaxRequest()
    {
        return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH']==='XMLHttpRequest';
    }

    /*
     * Empty cache folder
     */
    public static function emptyCache()
    {
        $files = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator(CACHE, RecursiveDirectoryIterator::SKIP_DOTS),
            RecursiveIteratorIterator::CHILD_FIRST
        );

        foreach ($files as $fileInfo) {
            $filename = $fileInfo->getFilename();
            if (!$filename[0] == '.') {
                $todo = ($fileInfo->isDir() ? 'rmdir' : 'unlink');
                $todo($fileInfo->getRealPath());
            }
        }

        Tools::logm('empty cache');
        Tools::redirect();
    }

    public static function generateToken()
    {
        if (ini_get('open_basedir') === '') {
            if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
                // alternative to /dev/urandom for Windows
                $token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20);
            } else {
                $token = substr(base64_encode(file_get_contents('/dev/urandom', false, null, 0, 20)), 0, 15);
            }
        }
        else {
            $token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20);
        }

        return str_replace('+', '', $token);
    }

    /** 
    *
    * Returns the doctype for an HTML document (used for Mozilla Bookmarks)
    * @param simple_html_dom $doc
    * @return doctype $el
    *
    */

    public static function get_doctype($doc)
    {
        $els = $doc->find('unknown');

        foreach ($els as $e => $el) 
            if ($el->parent()->tag == 'root') 
                return $el;

        return NULL;
    }

}