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1 | <?php | |
2 | ||
3 | namespace Wallabag\CoreBundle\Helper; | |
4 | ||
5 | final class Tools | |
6 | { | |
7 | /** | |
8 | * Download a file (typically, for downloading pictures on web server) | |
9 | * | |
10 | * @param $url | |
11 | * @return bool|mixed|string | |
12 | */ | |
13 | public static function getFile($url) | |
14 | { | |
15 | $timeout = 15; | |
16 | $useragent = "Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0"; | |
17 | ||
18 | if (in_array('curl', get_loaded_extensions())) { | |
19 | # Fetch feed from URL | |
20 | $curl = curl_init(); | |
21 | curl_setopt($curl, CURLOPT_URL, $url); | |
22 | curl_setopt($curl, CURLOPT_TIMEOUT, $timeout); | |
23 | if (!ini_get('open_basedir') && !ini_get('safe_mode')) { | |
24 | curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); | |
25 | } | |
26 | curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); | |
27 | curl_setopt($curl, CURLOPT_HEADER, false); | |
28 | ||
29 | # for ssl, do not verified certificate | |
30 | curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); | |
31 | curl_setopt($curl, CURLOPT_AUTOREFERER, true); | |
32 | ||
33 | # FeedBurner requires a proper USER-AGENT... | |
34 | curl_setopt($curl, CURL_HTTP_VERSION_1_1, true); | |
35 | curl_setopt($curl, CURLOPT_ENCODING, "gzip, deflate"); | |
36 | curl_setopt($curl, CURLOPT_USERAGENT, $useragent); | |
37 | ||
38 | $data = curl_exec($curl); | |
39 | $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE); | |
40 | $httpcodeOK = isset($httpcode) and ($httpcode == 200 or $httpcode == 301); | |
41 | curl_close($curl); | |
42 | } else { | |
43 | # create http context and add timeout and user-agent | |
44 | $context = stream_context_create( | |
45 | array( | |
46 | 'http' => array( | |
47 | 'timeout' => $timeout, | |
48 | 'header' => "User-Agent: ".$useragent, | |
49 | 'follow_location' => true, | |
50 | ), | |
51 | 'ssl' => array( | |
52 | 'verify_peer' => false, | |
53 | 'allow_self_signed' => true, | |
54 | ), | |
55 | ) | |
56 | ); | |
57 | ||
58 | # only download page lesser than 4MB | |
59 | $data = @file_get_contents($url, false, $context, -1, 4000000); | |
60 | ||
61 | if (isset($http_response_header) and isset($http_response_header[0])) { | |
62 | $httpcodeOK = isset($http_response_header) and isset($http_response_header[0]) and ((strpos($http_response_header[0], '200 OK') !== false) or (strpos($http_response_header[0], '301 Moved Permanently') !== false)); | |
63 | } | |
64 | } | |
65 | ||
66 | # if response is not empty and response is OK | |
67 | if (isset($data) and isset($httpcodeOK) and $httpcodeOK) { | |
68 | # take charset of page and get it | |
69 | preg_match('#<meta .*charset=.*>#Usi', $data, $meta); | |
70 | ||
71 | # if meta tag is found | |
72 | if (!empty($meta[0])) { | |
73 | preg_match('#charset="?(.*)"#si', $meta[0], $encoding); | |
74 | # if charset is found set it otherwise, set it to utf-8 | |
75 | $html_charset = (!empty($encoding[1])) ? strtolower($encoding[1]) : 'utf-8'; | |
76 | if (empty($encoding[1])) { | |
77 | $encoding[1] = 'utf-8'; | |
78 | } | |
79 | } else { | |
80 | $html_charset = 'utf-8'; | |
81 | $encoding[1] = ''; | |
82 | } | |
83 | ||
84 | # replace charset of url to charset of page | |
85 | $data = str_replace('charset='.$encoding[1], 'charset='.$html_charset, $data); | |
86 | ||
87 | return $data; | |
88 | } else { | |
89 | return false; | |
90 | } | |
91 | } | |
92 | ||
93 | /** | |
94 | * Encode a URL by using a salt | |
95 | * | |
96 | * @param $string | |
97 | * @return string | |
98 | */ | |
99 | public static function encodeString($string) | |
100 | { | |
101 | return sha1($string.SALT); | |
102 | } | |
103 | ||
104 | public static function generateToken() | |
105 | { | |
106 | if (ini_get('open_basedir') === '') { | |
107 | if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') { | |
108 | // alternative to /dev/urandom for Windows | |
109 | $token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20); | |
110 | } else { | |
111 | $token = substr(base64_encode(file_get_contents('/dev/urandom', false, null, 0, 20)), 0, 15); | |
112 | } | |
113 | } else { | |
114 | $token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20); | |
115 | } | |
116 | ||
117 | return str_replace('+', '', $token); | |
118 | } | |
119 | } |