source: extensions/piwigopress/PiwigoPress_get.php @ 8636

<?php
if (defined('PHPWG_ROOT_PATH')) return; /* Avoid direct usage under Piwigo */
if (!defined('PWGP_NAME')) return; /* Avoid unpredicted access */
//error_reporting(E_ALL);
if (!isset($pwg_mode)) $pwg_mode = ''; // Remind which process is working well
$pwg_prev_host = ''; // Remind last requested gallery 

function pwg_get_contents($url, $mode='') {

        global $pwg_mode, $pwg_prev_host;
        $timeout = 5; // will be a parameter (only for the socket)

        $host = (strtolower(substr($url,0,7)) == 'http://') ? substr($url,7) : $url;
        $host = (strtolower(substr($host,0,8)) == 'https://') ? substr($host,8) : $host;
        $doc = substr($host, strpos($host, '/'));
        $host = substr($host, 0, strpos($host, '/'));

        if ($pwg_prev_host != $host) $pwg_mode = ''; // What was possible with one website could be different with another
        $pwg_prev_host = $host;
        $mode = $pwg_mode;
        // $mode = 'ch'; // Forcing a test '' all, 'fs' fsockopen, 'ch' cURL

// 1 - The simplest solution: file_get_contents
// Contraint: php.ini
//      ; Whether to allow the treatment of URLs (like http:// or ftp://) as files.
//      allow_url_fopen = On
        if ( $mode == '' ) {
          if ( true === (bool) ini_get('allow_url_fopen') ) { 
                        $value = file_get_contents($url);
                        if ( $value !== false) {
                                return $value;
                        }
                }
        }
        if ( $mode == '' ) $mode = 'fs';
        if ( $pwg_mode == '' ) $pwg_mode = 'fs'; // Remind it
// 2 - Often accepted access: fsockopen
        if ($mode == 'fs') {
                $fs = fsockopen($host, 80, $errno, $errstr, $timeout);
                if ( $fs !== false ) {
                        fwrite($fs, 'GET ' . $doc . " HTTP/1.1\r\n");
                        fwrite($fs, 'Host: ' . $host . "\r\n");
                        fwrite($fs, "Connection: Close\r\n\r\n");
                        stream_set_blocking($fs, TRUE);
                        stream_set_timeout($fs,$timeout); // Again the $timeout on the get
                        $info = stream_get_meta_data($fs);
                        $value = '';
                        while ((!feof($fs)) && (!$info['timed_out'])) {
                                                        $value .= fgets($fs, 4096);
                                                        $info = stream_get_meta_data($fs);
                                                        flush();
                        }
                        $value = substr($value, strpos($value,'a:2:{s:4:"stat";'));
                        // echo '<br/>-fs- ('. $value . ') <br/>';
                        if ( $info['timed_out'] === false ) return $value;
                }
        }

        if ( $pwg_mode == 'fs' ) $pwg_mode = 'ch'; // Remind it
// 3 - Sometime another solution: curl_exec
// See http://fr2.php.net/manual/en/curl.installation.php
  if (function_exists('curl_init') and $pwg_mode == 'ch') {
                $ch = @curl_init();
                @curl_setopt($ch, CURLOPT_URL, $url);
                @curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
                @curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
                @curl_setopt($ch, CURLOPT_HEADER, 1);
                @curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');
                @curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                @curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
                $value = @curl_exec($ch);
                $header_length = @curl_getinfo($ch, CURLINFO_HEADER_SIZE);
                $status = @curl_getinfo($ch, CURLINFO_HTTP_CODE);
                @curl_close($value);
                if ($value !== false and $status >= 200 and $status < 400) {
                        $value = substr($value, $header_length);
                        // echo '<br/>-ch- ('. $value . ') <br/>';
                        return $value;
                }
                else $pwg_mode = 'failed'; // Sorry but remind it as well
        }

        // No other solutions
        $return["stat"] = 'failed';
        // echo '<br/>- pwg_get_contents: failed on file_get, fsockopen and cURL processes<br/>';
        return serialize($return);
}
?>