<? /*************************************** ** 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<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; } } ?>
