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Better compression compat. Props dd32. see #10163 

git-svn-id: https://develop.svn.wordpress.org/trunk@11684 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Ryan Boren 2009-07-02 23:18:27 +00:00
parent b4bdb17956
commit 17e3dc5b40
1 changed files with 37 additions and 1 deletions
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38
wp-includes/http.php
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@ -1784,7 +1784,7 @@ class WP_Http_Encoding {
* @return string|bool False on failure.
*/
function decompress( $compressed, $length = null ) {
$decompressed = gzinflate( $compressed );
$decompressed = WP_Http_Encoding::compatible_gzinflate( $compressed );
if ( false !== $decompressed )
return $decompressed;
@ -1804,6 +1804,42 @@ class WP_Http_Encoding {
return $compressed;
}
/**
* Decompression of deflated string while staying compatible with the majority of servers.
*
* Certain Servers will return deflated data with headers which PHP's gziniflate()
* function cannot handle out of the box. The following function lifted from
* http://au2.php.net/manual/en/function.gzinflate.php#77336 will attempt to deflate
* the various return forms used.
*
* @since 2.8.1
* @link http://au2.php.net/manual/en/function.gzinflate.php#77336
*
* @param string $gzData String to decompress.
* @return string|bool False on failure.
*/
function compatible_gzinflate($gzData) {
if ( substr($gzData, 0, 3) == "\x1f\x8b\x08" ) {
$i = 10;
$flg = ord( substr($gzData, 3, 1) );
if ( $flg > 0 ) {
if ( $flg & 4 ) {
list($xlen) = unpack('v', substr($gzData, $i, 2) );
$i = $i + 2 + $xlen;
}
if ( $flg & 8 )
$i = strpos($gzData, "\0", $i) + 1;
if ( $flg & 16 )
$i = strpos($gzData, "\0", $i) + 1;
if ( $flg & 2 )
$i = $i + 2;
}
return gzinflate( substr($gzData, $i, -8) );
} else {
return false;
}
}
/**
* What encoding types to accept and their priority values.
*