使用 php4 加速 web 传输

程序员文章站 2022-07-11 08:35:15

<?
/***************************************
** 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 !!";
** |?>
** |<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 \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 "\n\n";
$contents = ob_get_contents();
ob_end_clean();
if ($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;
}
}
?>

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