★使用 php4 加速 web 传输℃

使用 php4 加速 web 传输
/*************************************** 
** Title.........: PHP4 HTTP Compression Speeds up the Web 
** Version.......: 1.10 
** Author........: yungangwu 
** Filename......: gzdoc.php 
** Last changed..: 16/01/2005 
** Requirments...: PHP4 >= 4.0.1 
** PHP was configured with --with-zlib[=DIR] 
** the data transmission data on the fly 
** code by wuyungang (wyg) 
** Most newer browsers since 1998/1999 have 
** been equipped to support the HTTP 1.1 
** standard known as "content-encoding." 
** Essentially the browser indicates to the 
** server that it can accept "content encoding" 
** and if the server is capable it will then 
** compress the data and transmit it. The 
** browser decompresses it and then renders 
** the page. 
** Useage........: 
** No space before the beginning of the first '** ------------Start of file---------- 
** |** | include('gzdoc.php'); 
** | print "Start output !!"; 
** |?> 
** | 
** |... the page ... 
** | 
** |** | gzdocout(); 
** |?> 
** -------------End of file----------- 
***************************************/ 
ob_start(); 
ob_implicit_flush(0); 
function GetHeader(){ 
$headers = getallheaders(); 
while (list($header, $value) = each($headers)) { 
$Message .= "$header: $value
n"; 
} 
return $Message; 
} 
function CheckCanGzip(){ 
global $HTTP_ACCEPT_ENCODING, $PHP_SELF, $Wget, $REMOTE_ADDR, $S_UserName; 
if (connection_timeout() || connection_aborted()){ 
return 0; 
} 
if ((strpos('catoc'.$HTTP_ACCEPT_ENCODING, 'gzip')) || $Wget == 'Y'){ 
if (strpos('catoc'.$HTTP_ACCEPT_ENCODING, 'x-gzip')){ 
$ENCODING = "x-gzip"; 
$Error_Msg = str_replace('
','',GetHeader()); 
$Error_Msg .= "Time: ".date("Y-m-d H:i:s")."n"; 
$Error_Msg .= "Remote-Address: ".$REMOTE_ADDR."n"; 
//mail('your@none.net', "User have x-gzip output in file $PHP_SELF!!!", $Error_Msg); 
}else{ 
$ENCODING = "gzip"; 
} 
return $ENCODING; 
}else{ 
return 0; 
} 
} 
function GzDocOut(){ 
global $PHP_SELF, $CatocGz, $REMOTE_ADDR, $S_UserName; 
$ENCODING = CheckCanGzip(); 
if ($ENCODING){ 
print "nn"; 
$Contents = ob_get_contents(); 
ob_end_clean(); 
if ($CatocGz == 'Y'){ 
print "Not compress lenth: ".strlen($Contents)."
"; 
print "Compressed lenth: ".strlen(gzcompress($Contents))."
"; 
exit; 
}else{ 
header("Content-Encoding: $ENCODING"); 
} 
print pack('cccccccc',0x1f,0x8b,0x08,0x00,0x00,0x00,0x00,0x00); 
$Size = strlen($Contents); 
$Crc = crc32($Contents); 
$Contents = gzcompress($Contents); 
$Contents = substr($Contents, 0, strlen($Contents) - 4); 
print $Contents; 
print pack('V',$Crc); 
print pack('V',$Size); 
exit; 
}else{ 
ob_end_flush(); 
$Error_Msg = str_replace('
','',GetHeader()); 
$Error_Msg .= "Time: ".date("Y-m-d H:i:s")."n"; 
$Error_Msg .= "Remote-Address: ".$REMOTE_ADDR."n"; 
//mail('your@none.net', "User can not use gzip output in file $PHP_SELF!!!", $Error_Msg); 
exit; 
} 
} 
?>