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1 | <?php | |
2 | /** | |
3 | * GET an HTTP URL to retrieve its content | |
4 | * | |
5 | * @param string $url URL to get (http://...) | |
6 | * @param int $timeout network timeout (in seconds) | |
7 | * @param int $maxBytes maximum downloaded bytes (default: 4 MiB) | |
8 | * | |
9 | * @return array HTTP response headers, downloaded content | |
10 | * | |
11 | * Output format: | |
12 | * [0] = associative array containing HTTP response headers | |
13 | * [1] = URL content (downloaded data) | |
14 | * | |
15 | * Example: | |
16 | * list($headers, $data) = get_http_url('http://sebauvage.net/'); | |
17 | * if (strpos($headers[0], '200 OK') !== false) { | |
18 | * echo 'Data type: '.htmlspecialchars($headers['Content-Type']); | |
19 | * } else { | |
20 | * echo 'There was an error: '.htmlspecialchars($headers[0]); | |
21 | * } | |
22 | * | |
23 | * @see http://php.net/manual/en/function.file-get-contents.php | |
24 | * @see http://php.net/manual/en/function.stream-context-create.php | |
25 | * @see http://php.net/manual/en/function.get-headers.php | |
26 | */ | |
27 | function get_http_url($url, $timeout = 30, $maxBytes = 4194304) | |
28 | { | |
29 | $options = array( | |
30 | 'http' => array( | |
31 | 'method' => 'GET', | |
32 | 'timeout' => $timeout, | |
33 | 'user_agent' => 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0)' | |
34 | .' Gecko/20100101 Firefox/23.0' | |
35 | ) | |
36 | ); | |
37 | ||
38 | $context = stream_context_create($options); | |
39 | ||
40 | try { | |
41 | // TODO: catch Exception in calling code (thumbnailer) | |
42 | $content = file_get_contents($url, false, $context, -1, $maxBytes); | |
43 | } catch (Exception $exc) { | |
44 | return array(array(0 => 'HTTP Error'), $exc->getMessage()); | |
45 | } | |
46 | ||
47 | if (!$content) { | |
48 | return array(array(0 => 'HTTP Error'), ''); | |
49 | } | |
50 | ||
51 | return array(get_headers($url, 1), $content); | |
52 | } | |
53 | ||
54 | /** | |
55 | * Returns the server's base URL: scheme://domain.tld[:port] | |
56 | * | |
57 | * @param array $server the $_SERVER array | |
58 | * | |
59 | * @return string the server's base URL | |
60 | * | |
61 | * @see http://www.ietf.org/rfc/rfc7239.txt | |
62 | * @see http://www.ietf.org/rfc/rfc6648.txt | |
63 | * @see http://stackoverflow.com/a/3561399 | |
64 | * @see http://stackoverflow.com/q/452375 | |
65 | */ | |
66 | function server_url($server) | |
67 | { | |
68 | $scheme = 'http'; | |
69 | $port = ''; | |
70 | ||
71 | // Shaarli is served behind a proxy | |
72 | if (isset($server['HTTP_X_FORWARDED_PROTO'])) { | |
73 | // Keep forwarded scheme | |
74 | $scheme = $server['HTTP_X_FORWARDED_PROTO']; | |
75 | ||
76 | if (isset($server['HTTP_X_FORWARDED_PORT'])) { | |
77 | // Keep forwarded port | |
78 | $port = ':'.$server['HTTP_X_FORWARDED_PORT']; | |
79 | } | |
80 | ||
81 | return $scheme.'://'.$server['SERVER_NAME'].$port; | |
82 | } | |
83 | ||
84 | // SSL detection | |
85 | if ((! empty($server['HTTPS']) && strtolower($server['HTTPS']) == 'on') | |
86 | || (isset($server['SERVER_PORT']) && $server['SERVER_PORT'] == '443')) { | |
87 | $scheme = 'https'; | |
88 | } | |
89 | ||
90 | // Do not append standard port values | |
91 | if (($scheme == 'http' && $server['SERVER_PORT'] != '80') | |
92 | || ($scheme == 'https' && $server['SERVER_PORT'] != '443')) { | |
93 | $port = ':'.$server['SERVER_PORT']; | |
94 | } | |
95 | ||
96 | return $scheme.'://'.$server['SERVER_NAME'].$port; | |
97 | } | |
98 | ||
99 | /** | |
100 | * Returns the absolute URL of the current script, without the query | |
101 | * | |
102 | * If the resource is "index.php", then it is removed (for better-looking URLs) | |
103 | * | |
104 | * @param array $server the $_SERVER array | |
105 | * | |
106 | * @return string the absolute URL of the current script, without the query | |
107 | */ | |
108 | function index_url($server) | |
109 | { | |
110 | $scriptname = $server['SCRIPT_NAME']; | |
111 | if (endswith($scriptname, 'index.php')) { | |
112 | $scriptname = substr($scriptname, 0, -9); | |
113 | } | |
114 | return server_url($server) . $scriptname; | |
115 | } | |
116 | ||
117 | /** | |
118 | * Returns the absolute URL of the current script, with the query | |
119 | * | |
120 | * If the resource is "index.php", then it is removed (for better-looking URLs) | |
121 | * | |
122 | * @param array $server the $_SERVER array | |
123 | * | |
124 | * @return string the absolute URL of the current script, with the query | |
125 | */ | |
126 | function page_url($server) | |
127 | { | |
128 | if (! empty($server['QUERY_STRING'])) { | |
129 | return index_url($server).'?'.$server['QUERY_STRING']; | |
130 | } | |
131 | return index_url($server); | |
132 | } |