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<?
/*
Title.........: PHP4 HTTP Compression Speeds up the Web
Version.......: 1.10
Author........: catoc catoc@163.net
Filename......: gzdoc.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) catoc@163.net
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 !!";
|?>
|
|... 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
";
}
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")."
";
$Error_Msg .= "Remote-Address: ".$REMOTE_ADDR.
" ";
//mail('your@none.net', "User have x-gzip outp
ut 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 " ";
$Contents = ob_get_contents();
ob_end_clean();
if ($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,0x08,0x00,0x00,0x00,0x
00,0x00);
$Size = strlen($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")." ";
$Error_Msg .= "Remote-Address: ".$REMOTE_ADDR." ";
//mail('your@none.net', "User can not use gzip output
in file $PHP_SELF!!!", $Error_Msg);
exit;
}
}
?>