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file = $file;
}
/**
* Get the Content-Type of the specified file
*
* @return string Actual Content-Type
*/
public function get_type()
{
if (isset($this->file->headers['content-type'])) {
if (!isset($this->file->headers['content-encoding'])
&& ($this->file->headers['content-type'] === 'text/plain'
|| $this->file->headers['content-type'] === 'text/plain; charset=ISO-8859-1'
|| $this->file->headers['content-type'] === 'text/plain; charset=iso-8859-1'
|| $this->file->headers['content-type'] === 'text/plain; charset=UTF-8')) {
return $this->text_or_binary();
}
if (($pos = strpos($this->file->headers['content-type'], ';')) !== false) {
$official = substr($this->file->headers['content-type'], 0, $pos);
} else {
$official = $this->file->headers['content-type'];
}
$official = trim(strtolower($official));
if ($official === 'unknown/unknown'
|| $official === 'application/unknown') {
return $this->unknown();
} elseif (substr($official, -4) === '+xml'
|| $official === 'text/xml'
|| $official === 'application/xml') {
return $official;
} elseif (substr($official, 0, 6) === 'image/') {
if ($return = $this->image()) {
return $return;
}
return $official;
} elseif ($official === 'text/html') {
return $this->feed_or_html();
}
return $official;
}
return $this->unknown();
}
/**
* Sniff text or binary
*
* @return string Actual Content-Type
*/
public function text_or_binary()
{
if (substr($this->file->body, 0, 2) === "\xFE\xFF"
|| substr($this->file->body, 0, 2) === "\xFF\xFE"
|| substr($this->file->body, 0, 4) === "\x00\x00\xFE\xFF"
|| substr($this->file->body, 0, 3) === "\xEF\xBB\xBF") {
return 'text/plain';
} elseif (preg_match('/[\x00-\x08\x0E-\x1A\x1C-\x1F]/', $this->file->body)) {
return 'application/octet-stream';
}
return 'text/plain';
}
/**
* Sniff unknown
*
* @return string Actual Content-Type
*/
public function unknown()
{
$ws = strspn($this->file->body, "\x09\x0A\x0B\x0C\x0D\x20");
if (strtolower(substr($this->file->body, $ws, 14)) === 'file->body, $ws, 5)) === 'file->body, $ws, 7)) === 'file->body, 0, 5) === '%PDF-') {
return 'application/pdf';
} elseif (substr($this->file->body, 0, 11) === '%!PS-Adobe-') {
return 'application/postscript';
} elseif (substr($this->file->body, 0, 6) === 'GIF87a'
|| substr($this->file->body, 0, 6) === 'GIF89a') {
return 'image/gif';
} elseif (substr($this->file->body, 0, 8) === "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A") {
return 'image/png';
} elseif (substr($this->file->body, 0, 3) === "\xFF\xD8\xFF") {
return 'image/jpeg';
} elseif (substr($this->file->body, 0, 2) === "\x42\x4D") {
return 'image/bmp';
} elseif (substr($this->file->body, 0, 4) === "\x00\x00\x01\x00") {
return 'image/vnd.microsoft.icon';
}
return $this->text_or_binary();
}
/**
* Sniff images
*
* @return string Actual Content-Type
*/
public function image()
{
if (substr($this->file->body, 0, 6) === 'GIF87a'
|| substr($this->file->body, 0, 6) === 'GIF89a') {
return 'image/gif';
} elseif (substr($this->file->body, 0, 8) === "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A") {
return 'image/png';
} elseif (substr($this->file->body, 0, 3) === "\xFF\xD8\xFF") {
return 'image/jpeg';
} elseif (substr($this->file->body, 0, 2) === "\x42\x4D") {
return 'image/bmp';
} elseif (substr($this->file->body, 0, 4) === "\x00\x00\x01\x00") {
return 'image/vnd.microsoft.icon';
}
return false;
}
/**
* Sniff HTML
*
* @return string Actual Content-Type
*/
public function feed_or_html()
{
$len = strlen($this->file->body);
$pos = strspn($this->file->body, "\x09\x0A\x0D\x20\xEF\xBB\xBF");
while ($pos < $len) {
switch ($this->file->body[$pos]) {
case "\x09":
case "\x0A":
case "\x0D":
case "\x20":
$pos += strspn($this->file->body, "\x09\x0A\x0D\x20", $pos);
continue 2;
case '<':
$pos++;
break;
default:
return 'text/html';
}
if (substr($this->file->body, $pos, 3) === '!--') {
$pos += 3;
if ($pos < $len && ($pos = strpos($this->file->body, '-->', $pos)) !== false) {
$pos += 3;
} else {
return 'text/html';
}
} elseif (substr($this->file->body, $pos, 1) === '!') {
if ($pos < $len && ($pos = strpos($this->file->body, '>', $pos)) !== false) {
$pos++;
} else {
return 'text/html';
}
} elseif (substr($this->file->body, $pos, 1) === '?') {
if ($pos < $len && ($pos = strpos($this->file->body, '?>', $pos)) !== false) {
$pos += 2;
} else {
return 'text/html';
}
} elseif (substr($this->file->body, $pos, 3) === 'rss'
|| substr($this->file->body, $pos, 7) === 'rdf:RDF') {
return 'application/rss+xml';
} elseif (substr($this->file->body, $pos, 4) === 'feed') {
return 'application/atom+xml';
} else {
return 'text/html';
}
}
return 'text/html';
}
}
class_alias('SimplePie\Content\Type\Sniffer', 'SimplePie_Content_Type_Sniffer');