/**
* Handler that compresses data with gzip if allowed by the Accept header.
* Unlike ob_gzhandler, it works for HEAD requests too.
*
* @param $s string
*
* @return string
*/
function wfGzipHandler($s)
{
if (!function_exists('gzencode') || headers_sent()) {
return $s;
}
$ext = wfRequestExtension();
if ($ext == '.gz' || $ext == '.tgz') {
// Don't do gzip compression if the URL path ends in .gz or .tgz
// This confuses Safari and triggers a download of the page,
// even though it's pretty clearly labeled as viewable HTML.
// Bad Safari! Bad!
return $s;
}
if (wfClientAcceptsGzip()) {
header('Content-Encoding: gzip');
$s = gzencode($s, 6);
}
// Set vary header if it hasn't been set already
$headers = headers_list();
$foundVary = false;
foreach ($headers as $header) {
if (substr($header, 0, 5) == 'Vary:') {
$foundVary = true;
break;
}
}
if (!$foundVary) {
header('Vary: Accept-Encoding');
global $wgUseXVO;
if ($wgUseXVO) {
header('X-Vary-Options: Accept-Encoding;list-contains=gzip');
}
}
return $s;
}
/**
* Handler that compresses data with gzip if allowed by the Accept header.
* Unlike ob_gzhandler, it works for HEAD requests too.
*/
function wfGzipHandler($s)
{
if (!function_exists('gzencode') || headers_sent()) {
return $s;
}
$ext = wfRequestExtension();
if ($ext == '.gz' || $ext == '.tgz') {
// Don't do gzip compression if the URL path ends in .gz or .tgz
// This confuses Safari and triggers a download of the page,
// even though it's pretty clearly labeled as viewable HTML.
// Bad Safari! Bad!
return $s;
}
if (isset($_SERVER['HTTP_ACCEPT_ENCODING'])) {
$tokens = preg_split('/[,; ]/', $_SERVER['HTTP_ACCEPT_ENCODING']);
if (in_array('gzip', $tokens)) {
header('Content-Encoding: gzip');
$s = gzencode($s, 3);
}
}
// Set vary header if it hasn't been set already
$headers = headers_list();
$foundVary = false;
foreach ($headers as $header) {
if (substr($header, 0, 5) == 'Vary:') {
$foundVary = true;
break;
}
}
if (!$foundVary) {
header('Vary: Accept-Encoding');
header('X-Vary-Options: Accept-Encoding;list-contains=gzip');
}
return $s;
}
/**
* Handler that compresses data with gzip if allowed by the Accept header.
* Unlike ob_gzhandler, it works for HEAD requests too.
*
* @param string $s
*
* @return string
*/
function wfGzipHandler($s)
{
if (!function_exists('gzencode')) {
wfDebug(__FUNCTION__ . "() skipping compression (gzencode unavailable)\n");
return $s;
}
if (headers_sent()) {
wfDebug(__FUNCTION__ . "() skipping compression (headers already sent)\n");
return $s;
}
$ext = wfRequestExtension();
if ($ext == '.gz' || $ext == '.tgz') {
// Don't do gzip compression if the URL path ends in .gz or .tgz
// This confuses Safari and triggers a download of the page,
// even though it's pretty clearly labeled as viewable HTML.
// Bad Safari! Bad!
return $s;
}
if (wfClientAcceptsGzip()) {
wfDebug(__FUNCTION__ . "() is compressing output\n");
header('Content-Encoding: gzip');
$s = gzencode($s, 6);
}
// Set vary header if it hasn't been set already
$headers = headers_list();
$foundVary = false;
foreach ($headers as $header) {
$headerName = strtolower(substr($header, 0, 5));
if ($headerName == 'vary:') {
$foundVary = true;
break;
}
}
if (!$foundVary) {
header('Vary: Accept-Encoding');
global $wgUseKeyHeader;
if ($wgUseKeyHeader) {
header('Key: Accept-Encoding;match=gzip');
}
}
return $s;
}
