标 题: 使用php4加速网络传输。<? /*************************************** ** 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<br> "; } 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 " <!-- Use compress $ENCODING --> "; $Contents = ob_get_contents(); ob_end_clean(); if ($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,0x08,0x00,0x00,0x00,0x 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("<br>","",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; } } ?>
