使用php4加速網絡傳輸

2024-05-04 23:00:58

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標題: 使用php4加速網絡傳輸。

<?
/***************************************
** title.........: php4 http compression speeds up the web
** version.......: 1.10
** author........: catoc <[email protected]>
** 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) <[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 ";
 }
 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")."
";
 $error_msg .= "remote-address: ".$remote_addr.
" ";
 //mail('[email protected]', "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('[email protected]', "user can not use gzip output
in file $php_self!!!", $error_msg);
 exit;
 }
}
?>

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