<?
/***************************************
** Title………: php4 HTTP Compression Speeds up the web
** Version…….: 1.10
** Author……..: catoc <[email protected]>
** Filename……: gzdoc.php
http://www.gaodaima.com/46421.html使用 php 4 加速 web 传输_php
** Last changed..: 25/08/2000
** Requirments…: PHP4 >= 4.0.1
** PHP was configured with –with-zlib[=DIR]
** Notes………: Dynamic Content Acceleration compresses
** the data transmission data on the fly
** code by sun jin hu (catoc) <[email protected]>
** 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 ‘<?’ tag.
** ————Start of file———-
** |<?
** | include(‘gzdoc.php’);
** | print "Start output !!";
** |?>
** |<HTML>
** |… the page …
** |</HTML>
** |<?
** | gzdocout();
** |?>
** ————-End of file———–
***************************************/
ob_start();
ob_implicit_flush(0);
function GetHeader(){
$headers = getallheaders();
while (list($header, $value) = each($headers)) {
$Message .= "$header: $value<br>/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(‘<br>’,”,GetHeader());
$Error_Msg .= "Time: ".date("Y-m-d H:i:s")."/n";
$Error_Msg .= "Remote-Address: ".$REMOTE_ADDR."/n";
//mail(‘[email protected]’, "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 "/n<!– Use compress $ENCODING –>/n";
$Contents = ob_get_contents();
ob_end_clean();
if ($CatocGz == ‘Y’){
print "Not compress lenth: ".strlen($Contents)."<BR>";
print "Compressed lenth: ".strlen(gzcompress($Contents))."<BR>";
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(‘<br>’,”,GetHeader());
$Error_Msg .= "Time: ".date("Y-m-d H:i:s")."/n";
$Error_Msg .= "Remote-Address: ".$REMOTE_ADDR."/n";
//mail(‘[email protected]’, "User can not use gzip output in file $PHP_SELF!!!", $Error_Msg);
exit;
}
}
?>
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