使用 php4 加速 web 传输 - 网络创业、淘金手册、投资的帮手|网友学堂

» 网友学堂 » PHP教程 » 使用 php4 加速 web 传输

使用 php4 加速 web 传输

作者：天若有情发表时间：2008-5-17 00:37 阅读：291次

<?
/***************************************
** 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 
";
}
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("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 "

";
$Contents = ob_get_contents();
ob_end_clean();
if ($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")."
";
$Error_Msg .= "Remote-Address: ".$REMOTE_ADDR."
";
//mail("your@none.net", "User can not use gzip output in file $PHP_SELF!!!", $Error_Msg);
exit;
}
}
?>

#Advertisement