public function view($file, $type)
{
global $ci, $page;
$file .= '.' . $type;
$type = strtolower($type);
$image = $compress = $deliver = $download = $stream = false;
if (preg_match('/^(jpe?g|gif|png|ico)$/', $type)) {
$image = $type;
} elseif (preg_match('/^(js|css|pdf|ttf|otf|svg)$/', $type)) {
$compress = $type;
} elseif (preg_match('/^(eot|woff2?|swf)$/', $type)) {
$deliver = $type;
} elseif (preg_match('/^(tar|t?gz|zip|csv|xls?x?|word|docx?|ppt|psd)$/', $type)) {
$download = $type;
} elseif (preg_match('/^(ogg|wav|mp3|mp4|mpeg?|mpg|mov|qt)$/', $type)) {
$stream = $type;
} else {
exit(header('HTTP/1.1 503 Not Implemented'));
}
if ($this->cached($file)) {
list($files, $updated) = $this->file_paths($file);
if (empty($files)) {
exit(header('HTTP/1.1 404 Not Found'));
}
$cache = array_shift($files);
// Only one file at a time is allowed now
$updated = array_shift($updated);
if (preg_match('/^.{5}\\/((~)?([0-9]{1,3})[x]{1}([0-9]{1,3})(:[0-9]{1,3})?)[\\/\\.]{1}/', $file, $matches)) {
$thumb = BASE_URI . 'thumbs/' . md5($cache) . '/' . rawurlencode($matches[1]) . '.' . $type;
if (!is_file($thumb) || filemtime($thumb) < $updated) {
// create the image thumb
require_once BASE . 'Page.php';
$page = new Page();
$thumbnail = $page->plugin('Image', 'uri', $cache);
if ($matches[2] == '~') {
$thumbnail->constrain($matches[3], $matches[4]);
} else {
$thumbnail->resize($matches[3], $matches[4], 'enforce');
}
$thumbnail->save($thumb, isset($matches[5]) ? min(substr($matches[5], 1), 100) : 80);
}
$cache = $thumb;
$updated = filemtime($thumb);
}
if (!$download && !$stream) {
$this->never_expires($updated);
}
if ($compress == 'pdf' || $download || $stream) {
$ci->load->driver('session');
$resource = str_replace(array(BASE_URI, BASE), '', $cache);
$resource .= '#' . substr(strstr($ci->uri->uri_string(), '/'), 1);
$ci->log_analytics('hits', $resource);
}
} elseif (strpos($file, 'CDN') !== false && is_file(BASE . $file)) {
$cache = BASE . $file;
$this->never_expires(filemtime($cache));
} elseif ($file == 'favicon.ico') {
$cache = dirname(__DIR__) . DIRECTORY_SEPARATOR . $file;
$this->never_expires(filemtime($cache));
} else {
exit(header('HTTP/1.1 404 Not Found'));
}
$mimes =& get_mimes();
header('Content-Type: ' . (is_array($mimes[$type]) ? array_shift($mimes[$type]) : $mimes[$type]));
if ($compress) {
$supported = isset($_SERVER['HTTP_ACCEPT_ENCODING']) ? $_SERVER['HTTP_ACCEPT_ENCODING'] : '';
$gzip = strstr($supported, 'gzip');
$deflate = strstr($supported, 'deflate');
$encoding = $gzip ? 'gzip' : ($deflate ? 'deflate' : 'none');
if (isset($_SERVER['HTTP_USER_AGENT']) && !strstr($_SERVER['HTTP_USER_AGENT'], 'Opera') && preg_match('/^Mozilla\\/4\\.0 \\(compatible; MSIE ([0-9]\\.[0-9])/i', $_SERVER['HTTP_USER_AGENT'], $matches)) {
$version = floatval($matches[1]);
if ($version < 6) {
$encoding = 'none';
}
if ($version == 6 && !strstr($_SERVER['HTTP_USER_AGENT'], 'EV1')) {
$encoding = 'none';
}
}
$cache = $type == 'css' ? $this->css_get_contents($cache, $file) : file_get_contents($cache);
if ($encoding != 'none') {
$cache = gzencode($cache, 9, $encoding == 'gzip' ? FORCE_GZIP : FORCE_DEFLATE);
header('Vary: Accept-Encoding');
header('Content-Encoding: ' . $encoding);
}
header('Content-Length: ' . strlen($cache));
exit($cache);
}
if (!($fp = fopen($cache, 'rb'))) {
header('HTTP/1.1 500 Internal Server Error');
exit;
}
$size = filesize($cache);
if ($download || $stream) {
ini_set('zlib.output_compression', 'Off');
$length = $size;
$start = 0;
$end = $size - 1;
if ($range = $ci->input->server('HTTP_RANGE')) {
// serve a partial file
if (preg_match('%bytes=(\\d+)-(\\d+)?%i', $range, $match)) {
$match = array_map('intval', $match);
if (!isset($match[2])) {
$match[2] = $end;
}
$length = $match[2] - $match[1] + 1;
}
if ($length <= $size) {
fseek($fp, $match[1]);
header('HTTP/1.1 206 Partial Content');
header("Content-Range: bytes {$match[1]}-{$match[2]}/{$size}");
} else {
header('HTTP/1.1 416 Requested Range Not Satisfiable');
header("Content-Range: bytes {$start}-{$end}/{$size}");
exit;
}
}
header('Accept-Ranges: bytes');
header('Connection: Keep-Alive"');
header('X-Pad: avoid browser bug');
header('Pragma: public');
// Fix IE6 Content-Disposition
header('Expires: -1');
// Prevent caching
header('Cache-Control: public, must-revalidate, post-check=0, pre-check=0');
header('Etag: "' . filemtime($cache) . '-' . md5($cache) . '"');
// Enable resumable download in IE9.
if ($download) {
header('Content-Disposition: attachment; filename="' . basename($file) . '"');
} elseif ($stream) {
header('Content-Disposition: inline;');
header('Content-Transfer-Encoding: binary');
}
$size = $length;
}
header('Content-Length: ' . $size);
ob_end_clean();
while ($size) {
set_time_limit(0);
$read = $size > 8192 ? 8192 : $size;
$size -= $read;
echo fread($fp, $read);
flush();
}
fclose($fp);
exit;
}
